5:12 a.m.
This patch set adds block io, memory and domain cpu statistics API
slot implementations to the LXC driver, in order to get linux
container monitoring and accounting a bit closer to qemu standards.
The last patch is a tad quirky (happy to hear suggestions on
alternative ways), in that it widens the permissible value set
at the .domainBlockStats slot: for lxc guests, it is relatively
likely to have zero disk devices, since host filesystems can be
used via passthrough bind mounts. Therefore, passing the zero-length
string as device path, is interpreted as 'return summary stats for
the entire domains's block io'.
Thorsten Behrens (6):
Add util virCgroupGetBlkioIo*Serviced methods.
Implement domainMemoryStats API slot for LXC driver.
Make qemuGetDomainTotalCPUStats a virCgroup function.
Implement domainGetCPUStats for lxc driver.
Implemet lxcDomainBlockStats for lxc driver
Widening API change - accept empty path for virDomainBlockStats
src/libvirt.c | 8 +-
src/libvirt_private.syms | 3 +
src/lxc/lxc_driver.c | 239 +++++++++++++++++++++++++++++++++++
src/qemu/qemu_driver.c | 54 +-------
src/util/vircgroup.c | 291 +++++++++++++++++++++++++++++++++++++++++++
src/util/vircgroup.h | 17 +++
tools/virsh-domain-monitor.c | 11 +-
tools/virsh.pod | 5 +-
8 files changed, 569 insertions(+), 59 deletions(-)
--
1.8.4
5:12 a.m.
New subject: [libvirt] [PATCHv2 1/6] Add util virCgroupGetBlkioIo*Serviced methods.
This reads blkio stats from blkio.throttle.io_service_bytes and
blkio.throttle.io_serviced.
---
Notes v2:
- loop over all devices in io_service_bytes / io_serviced files
- report value_names in error message
- adds overflow checks to summation
- moved loop invariants out for virCgroupGetBlkioIoDeviceServiced
- fixed func signatures for non-cgroup dummy impls
src/libvirt_private.syms | 2 +
src/util/vircgroup.c | 238 +++++++++++++++++++++++++++++++++++++++++++++++
src/util/vircgroup.h | 12 +++
3 files changed, 252 insertions(+)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 91d1304..e4815b3 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1002,6 +1002,8 @@ virCgroupDenyDevice;
virCgroupDenyDeviceMajor;
virCgroupDenyDevicePath;
virCgroupFree;
+virCgroupGetBlkioIoDeviceServiced;
+virCgroupGetBlkioIoServiced;
virCgroupGetBlkioWeight;
virCgroupGetCpuacctPercpuUsage;
virCgroupGetCpuacctStat;
diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index 43eb649..83fcefc 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -1826,6 +1826,217 @@ virCgroupGetBlkioWeight(virCgroupPtr group, unsigned int *weight)
/**
+ * virCgroupGetBlkioIoServiced:
+ *
+ * @group: The cgroup to get throughput for
+ * @kb: Pointer to returned serviced io in kilobytes
+ *
+ * Returns: 0 on success, -1 on error
+ */
+int
+virCgroupGetBlkioIoServiced(virCgroupPtr group,
+ long long *bytes_read,
+ long long *bytes_write,
+ long long *requests_read,
+ long long *requests_write)
+{
+ long long stats_val;
+ char *str1 = NULL, *str2 = NULL, *p1, *p2;
+ size_t i;
+ int ret = -1;
+
+ const char *value_names[] = {
+ "Read ",
+ "Write "
+ };
+ long long *bytes_ptrs[] = {
+ bytes_read,
+ bytes_write
+ };
+ long long *requests_ptrs[] = {
+ requests_read,
+ requests_write
+ };
+
+ *bytes_read = 0;
+ *bytes_write = 0;
+ *requests_read = 0;
+ *requests_write = 0;
+
+ if (virCgroupGetValueStr(group,
+ VIR_CGROUP_CONTROLLER_BLKIO,
+ "blkio.throttle.io_service_bytes", &str1) <
0)
+ goto cleanup;
+
+ if (virCgroupGetValueStr(group,
+ VIR_CGROUP_CONTROLLER_BLKIO,
+ "blkio.throttle.io_serviced", &str2) < 0)
+ goto cleanup;
+
+ /* sum up all entries of the same kind, from all devices */
+ for (i = 0; i < ARRAY_CARDINALITY(value_names); i++) {
+ p1 = str1;
+ p2 = str2;
+
+ while ((p1 = strstr(p1, value_names[i]))) {
+ p1 += strlen(value_names[i]);
+ if (virStrToLong_ll(p1, &p1, 10, &stats_val) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot parse byte %sstat '%s'"),
+ value_names[i],
+ p1);
+ goto cleanup;
+ }
+
+ if (stats_val < 0 ||
+ (stats_val > 0 && *bytes_ptrs[i] > (LLONG_MAX -
stats_val)))
+ {
+ virReportError(VIR_ERR_OVERFLOW,
+ _("Sum of byte %sstat overflows"),
+ value_names[i]);
+ goto cleanup;
+ }
+ *bytes_ptrs[i] += stats_val;
+ }
+
+ while ((p2 = strstr(p2, value_names[i]))) {
+ p2 += strlen(value_names[i]);
+ if (virStrToLong_ll(p2, &p2, 10, &stats_val) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot parse %srequest stat '%s'"),
+ value_names[i],
+ p2);
+ goto cleanup;
+ }
+
+ if (stats_val < 0 ||
+ (stats_val > 0 && *requests_ptrs[i] > (LLONG_MAX -
stats_val)))
+ {
+ virReportError(VIR_ERR_OVERFLOW,
+ _("Sum of %srequest stat overflows"),
+ value_names[i]);
+ goto cleanup;
+ }
+ *requests_ptrs[i] += stats_val;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ VIR_FREE(str2);
+ VIR_FREE(str1);
+ return ret;
+}
+
+
+/**
+ * virCgroupGetBlkioIoDeviceServiced:
+ *
+ * @group: The cgroup to get throughput for
+ * @path: The device to get throughput for
+ * @kb_read: Pointer to serviced read io in kilobytes
+ * @kb_write: Pointer to serviced write io in kilobytes
+ * @kb_total: Pointer to serviced io in kilobytes
+ *
+ * Returns: 0 on success, -1 on error
+ */
+int
+virCgroupGetBlkioIoDeviceServiced(virCgroupPtr group,
+ const char *path,
+ long long *bytes_read,
+ long long *bytes_write,
+ long long *requests_read,
+ long long *requests_write)
+{
+ char *str1 = NULL, *str2 = NULL, *str3 = NULL, *p;
+ struct stat sb;
+ size_t i;
+ int ret = -1;
+
+ const char *value_names[] = {
+ "Read ",
+ "Write "
+ };
+ long long *bytes_ptrs[] = {
+ bytes_read,
+ bytes_write
+ };
+ long long *requests_ptrs[] = {
+ requests_read,
+ requests_write
+ };
+
+ if (stat(path, &sb) < 0) {
+ virReportSystemError(errno,
+ _("Path '%s' is not accessible"),
+ path);
+ return -1;
+ }
+
+ if (!S_ISBLK(sb.st_mode)) {
+ virReportSystemError(EINVAL,
+ _("Path '%s' must be a block device"),
+ path);
+ return -1;
+ }
+
+ if (virCgroupGetValueStr(group,
+ VIR_CGROUP_CONTROLLER_BLKIO,
+ "blkio.throttle.io_service_bytes", &str1) <
0)
+ goto cleanup;
+
+ if (virCgroupGetValueStr(group,
+ VIR_CGROUP_CONTROLLER_BLKIO,
+ "blkio.throttle.io_serviced", &str2) < 0)
+ goto cleanup;
+
+ if (virAsprintf(&str3, "%d:%d ", major(sb.st_rdev), minor(sb.st_rdev))
< 0)
+ goto cleanup;
+
+ if (!(p = strstr(str1, str3))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot find byte stats for block device
'%s'"),
+ p);
+ goto cleanup;
+ }
+
+ if (!(p = strstr(str2, str3))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot find request stats for block device
'%s'"),
+ p);
+ goto cleanup;
+ }
+
+ for (i = 0; i < ARRAY_CARDINALITY(value_names); i++) {
+ if (!(p = strstr(p, value_names[i])) ||
+ virStrToLong_ll(p + strlen(value_names[i]), &p, 10, bytes_ptrs[i]) <
0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot parse stat '%s'"),
+ p + strlen(value_names[i]));
+ goto cleanup;
+ }
+
+ if (!(p = strstr(p, value_names[i])) ||
+ virStrToLong_ll(p + strlen(value_names[i]), &p, 10, requests_ptrs[i])
< 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot parse stat '%s'"),
+ p + strlen(value_names[i]));
+ goto cleanup;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ VIR_FREE(str3);
+ VIR_FREE(str2);
+ VIR_FREE(str1);
+ return ret;
+}
+
+
+/**
* virCgroupSetBlkioDeviceWeight:
*
* @group: The cgroup to change io device weight device for
@@ -3303,6 +3514,33 @@ virCgroupGetBlkioWeight(virCgroupPtr group ATTRIBUTE_UNUSED,
int
+virCgroupGetBlkioIoServiced(virCgroupPtr group ATTRIBUTE_UNUSED,
+ long long *bytes_read ATTRIBUTE_UNUSED,
+ long long *bytes_write ATTRIBUTE_UNUSED,
+ long long *requests_read ATTRIBUTE_UNUSED,
+ long long *requests_write ATTRIBUTE_UNUSED)
+{
+ virReportSystemError(ENXIO, "%s",
+ _("Control groups not supported on this platform"));
+ return -1;
+}
+
+
+int
+virCgroupGetBlkioIoDeviceServiced(virCgroupPtr group ATTRIBUTE_UNUSED,
+ const char *path ATTRIBUTE_UNUSED,
+ long long *bytes_read ATTRIBUTE_UNUSED,
+ long long *bytes_write ATTRIBUTE_UNUSED,
+ long long *requests_read ATTRIBUTE_UNUSED,
+ long long *requests_write ATTRIBUTE_UNUSED)
+{
+ virReportSystemError(ENXIO, "%s",
+ _("Control groups not supported on this platform"));
+ return -1;
+}
+
+
+int
virCgroupSetBlkioDeviceWeight(virCgroupPtr group ATTRIBUTE_UNUSED,
const char *path ATTRIBUTE_UNUSED,
unsigned int weight ATTRIBUTE_UNUSED)
diff --git a/src/util/vircgroup.h b/src/util/vircgroup.h
index 835eb30..cd6b27b 100644
--- a/src/util/vircgroup.h
+++ b/src/util/vircgroup.h
@@ -122,6 +122,18 @@ int virCgroupMoveTask(virCgroupPtr src_group,
int virCgroupSetBlkioWeight(virCgroupPtr group, unsigned int weight);
int virCgroupGetBlkioWeight(virCgroupPtr group, unsigned int *weight);
+int virCgroupGetBlkioIoServiced(virCgroupPtr group,
+ long long *bytes_read,
+ long long *bytes_write,
+ long long *requests_read,
+ long long *requests_write);
+int virCgroupGetBlkioIoDeviceServiced(virCgroupPtr group,
+ const char *path,
+ long long *bytes_read,
+ long long *bytes_write,
+ long long *requests_read,
+ long long *requests_write);
+
int virCgroupSetBlkioDeviceWeight(virCgroupPtr group,
const char *path,
unsigned int weight);
--
1.8.4
6:15 a.m.
New subject: [libvirt] [PATCHv3] Add util virCgroupGetBlkioIo*Serviced methods.
This reads blkio stats from blkio.throttle.io_service_bytes and
blkio.throttle.io_serviced.
---
Note on v3:
- rebased to current master, sadly the
virCgroupSetBlkioDeviceReadBps etc conflicted
src/libvirt_private.syms | 2 +
src/util/vircgroup.c | 242 +++++++++++++++++++++++++++++++++++++++++++++++
src/util/vircgroup.h | 12 +++
3 files changed, 256 insertions(+)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 3ede3d5..1e44ed8 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1002,6 +1002,8 @@ virCgroupDenyDevice;
virCgroupDenyDeviceMajor;
virCgroupDenyDevicePath;
virCgroupFree;
+virCgroupGetBlkioIoDeviceServiced;
+virCgroupGetBlkioIoServiced;
virCgroupGetBlkioWeight;
virCgroupGetCpuacctPercpuUsage;
virCgroupGetCpuacctStat;
diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index a6d60c5..2b70bcb 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -1786,6 +1786,221 @@ virCgroupPathOfController(virCgroupPtr group,
/**
+ * virCgroupGetBlkioIoServiced:
+ *
+ * @group: The cgroup to get throughput for
+ * @bytes_read: Pointer to returned bytes read
+ * @bytes_write: Pointer to returned bytes written
+ * @requests_read: Pointer to returned read io ops
+ * @requests_write: Pointer to returned write io ops
+ *
+ * Returns: 0 on success, -1 on error
+ */
+int
+virCgroupGetBlkioIoServiced(virCgroupPtr group,
+ long long *bytes_read,
+ long long *bytes_write,
+ long long *requests_read,
+ long long *requests_write)
+{
+ long long stats_val;
+ char *str1 = NULL, *str2 = NULL, *p1, *p2;
+ size_t i;
+ int ret = -1;
+
+ const char *value_names[] = {
+ "Read ",
+ "Write "
+ };
+ long long *bytes_ptrs[] = {
+ bytes_read,
+ bytes_write
+ };
+ long long *requests_ptrs[] = {
+ requests_read,
+ requests_write
+ };
+
+ *bytes_read = 0;
+ *bytes_write = 0;
+ *requests_read = 0;
+ *requests_write = 0;
+
+ if (virCgroupGetValueStr(group,
+ VIR_CGROUP_CONTROLLER_BLKIO,
+ "blkio.throttle.io_service_bytes", &str1) <
0)
+ goto cleanup;
+
+ if (virCgroupGetValueStr(group,
+ VIR_CGROUP_CONTROLLER_BLKIO,
+ "blkio.throttle.io_serviced", &str2) < 0)
+ goto cleanup;
+
+ /* sum up all entries of the same kind, from all devices */
+ for (i = 0; i < ARRAY_CARDINALITY(value_names); i++) {
+ p1 = str1;
+ p2 = str2;
+
+ while ((p1 = strstr(p1, value_names[i]))) {
+ p1 += strlen(value_names[i]);
+ if (virStrToLong_ll(p1, &p1, 10, &stats_val) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot parse byte %sstat '%s'"),
+ value_names[i],
+ p1);
+ goto cleanup;
+ }
+
+ if (stats_val < 0 ||
+ (stats_val > 0 && *bytes_ptrs[i] > (LLONG_MAX -
stats_val)))
+ {
+ virReportError(VIR_ERR_OVERFLOW,
+ _("Sum of byte %sstat overflows"),
+ value_names[i]);
+ goto cleanup;
+ }
+ *bytes_ptrs[i] += stats_val;
+ }
+
+ while ((p2 = strstr(p2, value_names[i]))) {
+ p2 += strlen(value_names[i]);
+ if (virStrToLong_ll(p2, &p2, 10, &stats_val) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot parse %srequest stat '%s'"),
+ value_names[i],
+ p2);
+ goto cleanup;
+ }
+
+ if (stats_val < 0 ||
+ (stats_val > 0 && *requests_ptrs[i] > (LLONG_MAX -
stats_val)))
+ {
+ virReportError(VIR_ERR_OVERFLOW,
+ _("Sum of %srequest stat overflows"),
+ value_names[i]);
+ goto cleanup;
+ }
+ *requests_ptrs[i] += stats_val;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ VIR_FREE(str2);
+ VIR_FREE(str1);
+ return ret;
+}
+
+
+/**
+ * virCgroupGetBlkioIoDeviceServiced:
+ *
+ * @group: The cgroup to get throughput for
+ * @path: The device to get throughput for
+ * @bytes_read: Pointer to returned bytes read
+ * @bytes_write: Pointer to returned bytes written
+ * @requests_read: Pointer to returned read io ops
+ * @requests_write: Pointer to returned write io ops
+ *
+ * Returns: 0 on success, -1 on error
+ */
+int
+virCgroupGetBlkioIoDeviceServiced(virCgroupPtr group,
+ const char *path,
+ long long *bytes_read,
+ long long *bytes_write,
+ long long *requests_read,
+ long long *requests_write)
+{
+ char *str1 = NULL, *str2 = NULL, *str3 = NULL, *p;
+ struct stat sb;
+ size_t i;
+ int ret = -1;
+
+ const char *value_names[] = {
+ "Read ",
+ "Write "
+ };
+ long long *bytes_ptrs[] = {
+ bytes_read,
+ bytes_write
+ };
+ long long *requests_ptrs[] = {
+ requests_read,
+ requests_write
+ };
+
+ if (stat(path, &sb) < 0) {
+ virReportSystemError(errno,
+ _("Path '%s' is not accessible"),
+ path);
+ return -1;
+ }
+
+ if (!S_ISBLK(sb.st_mode)) {
+ virReportSystemError(EINVAL,
+ _("Path '%s' must be a block device"),
+ path);
+ return -1;
+ }
+
+ if (virCgroupGetValueStr(group,
+ VIR_CGROUP_CONTROLLER_BLKIO,
+ "blkio.throttle.io_service_bytes", &str1) <
0)
+ goto cleanup;
+
+ if (virCgroupGetValueStr(group,
+ VIR_CGROUP_CONTROLLER_BLKIO,
+ "blkio.throttle.io_serviced", &str2) < 0)
+ goto cleanup;
+
+ if (virAsprintf(&str3, "%d:%d ", major(sb.st_rdev), minor(sb.st_rdev))
< 0)
+ goto cleanup;
+
+ if (!(p = strstr(str1, str3))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot find byte stats for block device
'%s'"),
+ p);
+ goto cleanup;
+ }
+
+ if (!(p = strstr(str2, str3))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot find request stats for block device
'%s'"),
+ p);
+ goto cleanup;
+ }
+
+ for (i = 0; i < ARRAY_CARDINALITY(value_names); i++) {
+ if (!(p = strstr(p, value_names[i])) ||
+ virStrToLong_ll(p + strlen(value_names[i]), &p, 10, bytes_ptrs[i]) <
0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot parse stat '%s'"),
+ p + strlen(value_names[i]));
+ goto cleanup;
+ }
+
+ if (!(p = strstr(p, value_names[i])) ||
+ virStrToLong_ll(p + strlen(value_names[i]), &p, 10, requests_ptrs[i])
< 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot parse stat '%s'"),
+ p + strlen(value_names[i]));
+ goto cleanup;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ VIR_FREE(str3);
+ VIR_FREE(str2);
+ VIR_FREE(str1);
+ return ret;
+}
+
+
+/**
* virCgroupSetBlkioWeight:
*
* @group: The cgroup to change io weight for
@@ -3459,6 +3674,33 @@ virCgroupMoveTask(virCgroupPtr src_group ATTRIBUTE_UNUSED,
int
+virCgroupGetBlkioIoServiced(virCgroupPtr group ATTRIBUTE_UNUSED,
+ long long *bytes_read ATTRIBUTE_UNUSED,
+ long long *bytes_write ATTRIBUTE_UNUSED,
+ long long *requests_read ATTRIBUTE_UNUSED,
+ long long *requests_write ATTRIBUTE_UNUSED)
+{
+ virReportSystemError(ENXIO, "%s",
+ _("Control groups not supported on this platform"));
+ return -1;
+}
+
+
+int
+virCgroupGetBlkioIoDeviceServiced(virCgroupPtr group ATTRIBUTE_UNUSED,
+ const char *path ATTRIBUTE_UNUSED,
+ long long *bytes_read ATTRIBUTE_UNUSED,
+ long long *bytes_write ATTRIBUTE_UNUSED,
+ long long *requests_read ATTRIBUTE_UNUSED,
+ long long *requests_write ATTRIBUTE_UNUSED)
+{
+ virReportSystemError(ENXIO, "%s",
+ _("Control groups not supported on this platform"));
+ return -1;
+}
+
+
+int
virCgroupSetBlkioWeight(virCgroupPtr group ATTRIBUTE_UNUSED,
unsigned int weight ATTRIBUTE_UNUSED)
{
diff --git a/src/util/vircgroup.h b/src/util/vircgroup.h
index a70eb18..3159a08 100644
--- a/src/util/vircgroup.h
+++ b/src/util/vircgroup.h
@@ -122,6 +122,18 @@ int virCgroupMoveTask(virCgroupPtr src_group,
int virCgroupSetBlkioWeight(virCgroupPtr group, unsigned int weight);
int virCgroupGetBlkioWeight(virCgroupPtr group, unsigned int *weight);
+int virCgroupGetBlkioIoServiced(virCgroupPtr group,
+ long long *bytes_read,
+ long long *bytes_write,
+ long long *requests_read,
+ long long *requests_write);
+int virCgroupGetBlkioIoDeviceServiced(virCgroupPtr group,
+ const char *path,
+ long long *bytes_read,
+ long long *bytes_write,
+ long long *requests_read,
+ long long *requests_write);
+
int virCgroupSetBlkioDeviceWeight(virCgroupPtr group,
const char *path,
unsigned int weight);
--
1.8.4
3:47 a.m.
New subject: [libvirt] [PATCHv3] Add util virCgroupGetBlkioIo*Serviced methods.
On 01/20/2014 08:15 PM, Thorsten Behrens wrote:
This reads blkio stats from blkio.throttle.io_service_bytes and
blkio.throttle.io_serviced.
---
Note on v3:
- rebased to current master, sadly the
virCgroupSetBlkioDeviceReadBps etc conflicted
src/libvirt_private.syms | 2 +
src/util/vircgroup.c | 242 +++++++++++++++++++++++++++++++++++++++++++++++
src/util/vircgroup.h | 12 +++
3 files changed, 256 insertions(+)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 3ede3d5..1e44ed8 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1002,6 +1002,8 @@ virCgroupDenyDevice;
virCgroupDenyDeviceMajor;
virCgroupDenyDevicePath;
virCgroupFree;
+virCgroupGetBlkioIoDeviceServiced;
+virCgroupGetBlkioIoServiced;
virCgroupGetBlkioWeight;
virCgroupGetCpuacctPercpuUsage;
virCgroupGetCpuacctStat;
diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index a6d60c5..2b70bcb 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -1786,6 +1786,221 @@ virCgroupPathOfController(virCgroupPtr group,
/**
+ * virCgroupGetBlkioIoServiced:
+ *
+ * @group: The cgroup to get throughput for
+ * @bytes_read: Pointer to returned bytes read
+ * @bytes_write: Pointer to returned bytes written
+ * @requests_read: Pointer to returned read io ops
+ * @requests_write: Pointer to returned write io ops
+ *
+ * Returns: 0 on success, -1 on error
+ */
+int
+virCgroupGetBlkioIoServiced(virCgroupPtr group,
+ long long *bytes_read,
+ long long *bytes_write,
+ long long *requests_read,
+ long long *requests_write)
+{
+ long long stats_val;
+ char *str1 = NULL, *str2 = NULL, *p1, *p2;
+ size_t i;
+ int ret = -1;
+
+ const char *value_names[] = {
+ "Read ",
+ "Write "
+ };
+ long long *bytes_ptrs[] = {
+ bytes_read,
+ bytes_write
+ };
+ long long *requests_ptrs[] = {
+ requests_read,
+ requests_write
+ };
+
+ *bytes_read = 0;
+ *bytes_write = 0;
+ *requests_read = 0;
+ *requests_write = 0;
+
+ if (virCgroupGetValueStr(group,
+ VIR_CGROUP_CONTROLLER_BLKIO,
+ "blkio.throttle.io_service_bytes", &str1)
< 0)
+ goto cleanup;
+
+ if (virCgroupGetValueStr(group,
+ VIR_CGROUP_CONTROLLER_BLKIO,
+ "blkio.throttle.io_serviced", &str2) < 0)
+ goto cleanup;
+
+ /* sum up all entries of the same kind, from all devices */
+ for (i = 0; i < ARRAY_CARDINALITY(value_names); i++) {
+ p1 = str1;
+ p2 = str2;
+
+ while ((p1 = strstr(p1, value_names[i]))) {
+ p1 += strlen(value_names[i]);
+ if (virStrToLong_ll(p1, &p1, 10, &stats_val) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot parse byte %sstat '%s'"),
+ value_names[i],
+ p1);
+ goto cleanup;
+ }
+
+ if (stats_val < 0 ||
+ (stats_val > 0 && *bytes_ptrs[i] > (LLONG_MAX -
stats_val)))
+ {
+ virReportError(VIR_ERR_OVERFLOW,
+ _("Sum of byte %sstat overflows"),
+ value_names[i]);
+ goto cleanup;
+ }
+ *bytes_ptrs[i] += stats_val;
+ }
+
+ while ((p2 = strstr(p2, value_names[i]))) {
+ p2 += strlen(value_names[i]);
+ if (virStrToLong_ll(p2, &p2, 10, &stats_val) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot parse %srequest stat '%s'"),
+ value_names[i],
+ p2);
+ goto cleanup;
+ }
+
+ if (stats_val < 0 ||
+ (stats_val > 0 && *requests_ptrs[i] > (LLONG_MAX -
stats_val)))
+ {
+ virReportError(VIR_ERR_OVERFLOW,
+ _("Sum of %srequest stat overflows"),
+ value_names[i]);
+ goto cleanup;
+ }
+ *requests_ptrs[i] += stats_val;
+ }
+ }
+
+ ret = 0;
+
+cleanup:
+ VIR_FREE(str2);
+ VIR_FREE(str1);
+ return ret;
+}
+
+
+/**
+ * virCgroupGetBlkioIoDeviceServiced:
+ *
+ * @group: The cgroup to get throughput for
+ * @path: The device to get throughput for
+ * @bytes_read: Pointer to returned bytes read
+ * @bytes_write: Pointer to returned bytes written
+ * @requests_read: Pointer to returned read io ops
+ * @requests_write: Pointer to returned write io ops
+ *
+ * Returns: 0 on success, -1 on error
+ */
+int
+virCgroupGetBlkioIoDeviceServiced(virCgroupPtr group,
+ const char *path,
+ long long *bytes_read,
+ long long *bytes_write,
+ long long *requests_read,
+ long long *requests_write)
+{
+ char *str1 = NULL, *str2 = NULL, *str3 = NULL, *p;
+ struct stat sb;
+ size_t i;
+ int ret = -1;
+
+ const char *value_names[] = {
+ "Read ",
+ "Write "
+ };
+ long long *bytes_ptrs[] = {
+ bytes_read,
+ bytes_write
+ };
+ long long *requests_ptrs[] = {
+ requests_read,
+ requests_write
+ };
+
+ if (stat(path, &sb) < 0) {
+ virReportSystemError(errno,
+ _("Path '%s' is not accessible"),
+ path);
+ return -1;
+ }
+
+ if (!S_ISBLK(sb.st_mode)) {
+ virReportSystemError(EINVAL,
+ _("Path '%s' must be a block device"),
+ path);
+ return -1;
+ }
+
+ if (virCgroupGetValueStr(group,
+ VIR_CGROUP_CONTROLLER_BLKIO,
+ "blkio.throttle.io_service_bytes", &str1)
< 0)
+ goto cleanup;
+
+ if (virCgroupGetValueStr(group,
+ VIR_CGROUP_CONTROLLER_BLKIO,
+ "blkio.throttle.io_serviced", &str2) < 0)
+ goto cleanup;
+
+ if (virAsprintf(&str3, "%d:%d ", major(sb.st_rdev), minor(sb.st_rdev))
< 0)
+ goto cleanup;
+
+ if (!(p = strstr(str1, str3))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot find byte stats for block device
'%s'"),
+ p);
path?
+ goto cleanup;
+ }
+
+ if (!(p = strstr(str2, str3))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot find request stats for block device
'%s'"),
+ p);
here too;
+ goto cleanup;
+ }
+
+ for (i = 0; i < ARRAY_CARDINALITY(value_names); i++) {
+ if (!(p = strstr(p, value_names[i])) ||
+ virStrToLong_ll(p + strlen(value_names[i]), &p, 10, bytes_ptrs[i]) <
0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot parse stat '%s'"),
+ p + strlen(value_names[i]));
p may null here.
+ goto cleanup;
+ }
+
+ if (!(p = strstr(p, value_names[i])) ||
+ virStrToLong_ll(p + strlen(value_names[i]), &p, 10, requests_ptrs[i])
< 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Cannot parse stat '%s'"),
+ p + strlen(value_names[i]));
here too;
ACK with these changed.
2:59 a.m.
on 2014/01/28 03:27, Thorsten Behrens wrote:
Hi,
Hi,
Sorry, I'm out of office now, If nobody gives you review or comments,
I will pick this up when I am back on Feb 10.
Thanks!
sorry for the noise - but I don't see the patch series pushed
yet?
Gao feng wrote:
> [...]
> ACK with these changed.
>
Should I fix the editorial issues & resubmit?
this should be great and I hadn't finished reviewing patch
"Implement lxcDomainBlockStatsFlags for lxc driver".
Thanks!
Gao
5:12 a.m.
New subject: [libvirt] [PATCHv2 2/6] Implement domainMemoryStats API slot for LXC driver.
---
Notes on v2:
- check if domain is running, fixed ret val calculation
- api slot comment is now referencing 1.2.2
src/lxc/lxc_driver.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 50 insertions(+)
diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index 5ae4b65..8cf8e48 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -4556,6 +4556,55 @@ lxcNodeGetInfo(virConnectPtr conn,
static int
+lxcDomainMemoryStats(virDomainPtr dom,
+ struct _virDomainMemoryStat *stats,
+ unsigned int nr_stats,
+ unsigned int flags)
+{
+ virDomainObjPtr vm;
+ int ret = -1;
+ virLXCDomainObjPrivatePtr priv;
+
+ virCheckFlags(0, -1);
+
+ if (!(vm = lxcDomObjFromDomain(dom)))
+ goto cleanup;
+
+ priv = vm->privateData;
+
+ if (virDomainMemoryStatsEnsureACL(dom->conn, vm->def) < 0)
+ goto cleanup;
+
+ ret = 0;
+ if (!virDomainObjIsActive(vm))
+ goto cleanup;
+
+ if (ret < nr_stats) {
+ stats[ret].tag = VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON;
+ stats[ret].val = vm->def->mem.cur_balloon;
+ ret++;
+ }
+ if (ret < nr_stats) {
+ stats[ret].tag = VIR_DOMAIN_MEMORY_STAT_SWAP_IN;
+ virCgroupGetMemSwapUsage(priv->cgroup, &stats[ret].val);
+ ret++;
+ }
+ if (ret < nr_stats) {
+ unsigned long kb;
+ stats[ret].tag = VIR_DOMAIN_MEMORY_STAT_RSS;
+ virCgroupGetMemoryUsage(priv->cgroup, &kb);
+ stats[ret].val = kb;
+ ret++;
+ }
+
+cleanup:
+ if (vm)
+ virObjectUnlock(vm);
+ return ret;
+}
+
+
+static int
lxcNodeGetCPUStats(virConnectPtr conn,
int cpuNum,
virNodeCPUStatsPtr params,
@@ -4783,6 +4832,7 @@ static virDriver lxcDriver = {
.domainSetSchedulerParameters = lxcDomainSetSchedulerParameters, /* 0.5.0 */
.domainSetSchedulerParametersFlags = lxcDomainSetSchedulerParametersFlags, /* 0.9.2
*/
.domainInterfaceStats = lxcDomainInterfaceStats, /* 0.7.3 */
+ .domainMemoryStats = lxcDomainMemoryStats, /* 1.2.2 */
.nodeGetCPUStats = lxcNodeGetCPUStats, /* 0.9.3 */
.nodeGetMemoryStats = lxcNodeGetMemoryStats, /* 0.9.3 */
.nodeGetCellsFreeMemory = lxcNodeGetCellsFreeMemory, /* 0.6.5 */
--
1.8.4
3:57 a.m.
New subject: [libvirt] [PATCHv2 2/6] Implement domainMemoryStats API slot for LXC driver.
On 01/20/2014 07:12 PM, Thorsten Behrens wrote:
---
Notes on v2:
- check if domain is running, fixed ret val calculation
- api slot comment is now referencing 1.2.2
src/lxc/lxc_driver.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 50 insertions(+)
diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index 5ae4b65..8cf8e48 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -4556,6 +4556,55 @@ lxcNodeGetInfo(virConnectPtr conn,
static int
+lxcDomainMemoryStats(virDomainPtr dom,
+ struct _virDomainMemoryStat *stats,
+ unsigned int nr_stats,
+ unsigned int flags)
+{
+ virDomainObjPtr vm;
+ int ret = -1;
+ virLXCDomainObjPrivatePtr priv;
+
+ virCheckFlags(0, -1);
+
+ if (!(vm = lxcDomObjFromDomain(dom)))
+ goto cleanup;
+
+ priv = vm->privateData;
+
+ if (virDomainMemoryStatsEnsureACL(dom->conn, vm->def) < 0)
+ goto cleanup;
+
+ ret = 0;
+ if (!virDomainObjIsActive(vm))
+ goto cleanup;
+
+ if (ret < nr_stats) {
+ stats[ret].tag = VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON;
+ stats[ret].val = vm->def->mem.cur_balloon;
+ ret++;
+ }
+ if (ret < nr_stats) {
+ stats[ret].tag = VIR_DOMAIN_MEMORY_STAT_SWAP_IN;
+ virCgroupGetMemSwapUsage(priv->cgroup, &stats[ret].val);
+ ret++;
+ }
+ if (ret < nr_stats) {
+ unsigned long kb;
+ stats[ret].tag = VIR_DOMAIN_MEMORY_STAT_RSS;
+ virCgroupGetMemoryUsage(priv->cgroup, &kb);
+ stats[ret].val = kb;
+ ret++;
+ }
+
+cleanup:
+ if (vm)
+ virObjectUnlock(vm);
+ return ret;
+}
+
+
+static int
lxcNodeGetCPUStats(virConnectPtr conn,
int cpuNum,
virNodeCPUStatsPtr params,
@@ -4783,6 +4832,7 @@ static virDriver lxcDriver = {
.domainSetSchedulerParameters = lxcDomainSetSchedulerParameters, /* 0.5.0 */
.domainSetSchedulerParametersFlags = lxcDomainSetSchedulerParametersFlags, /* 0.9.2
*/
.domainInterfaceStats = lxcDomainInterfaceStats, /* 0.7.3 */
+ .domainMemoryStats = lxcDomainMemoryStats, /* 1.2.2 */
.nodeGetCPUStats = lxcNodeGetCPUStats, /* 0.9.3 */
.nodeGetMemoryStats = lxcNodeGetMemoryStats, /* 0.9.3 */
.nodeGetCellsFreeMemory = lxcNodeGetCellsFreeMemory, /* 0.6.5 */
looks good to me
ACK
thanks!
5:12 a.m.
New subject: [libvirt] [PATCHv2 3/6] Make qemuGetDomainTotalCPUStats a virCgroup function.
To reuse this from other drivers, like lxc.
---
Notes on v2:
- renamed to proper camel case: virCgroupGetDomainTotalCpuStats
src/libvirt_private.syms | 1 +
src/qemu/qemu_driver.c | 54 ++----------------------------------------------
src/util/vircgroup.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++
src/util/vircgroup.h | 5 +++++
4 files changed, 61 insertions(+), 52 deletions(-)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index e4815b3..97198d1 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1013,6 +1013,7 @@ virCgroupGetCpuCfsQuota;
virCgroupGetCpusetCpus;
virCgroupGetCpusetMems;
virCgroupGetCpuShares;
+virCgroupGetDomainTotalCpuStats;
virCgroupGetFreezerState;
virCgroupGetMemoryHardLimit;
virCgroupGetMemorySoftLimit;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index ebb77dc..a1e45c3 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -105,7 +105,6 @@
#define QEMU_NB_NUMA_PARAM 2
-#define QEMU_NB_TOTAL_CPU_STAT_PARAM 3
#define QEMU_NB_PER_CPU_STAT_PARAM 2
#define QEMU_SCHED_MIN_PERIOD 1000LL
@@ -15304,56 +15303,6 @@ cleanup:
return ret;
}
-/* qemuDomainGetCPUStats() with start_cpu == -1 */
-static int
-qemuDomainGetTotalcpuStats(virDomainObjPtr vm,
- virTypedParameterPtr params,
- int nparams)
-{
- unsigned long long cpu_time;
- int ret;
- qemuDomainObjPrivatePtr priv = vm->privateData;
-
- if (nparams == 0) /* return supported number of params */
- return QEMU_NB_TOTAL_CPU_STAT_PARAM;
- /* entry 0 is cputime */
- ret = virCgroupGetCpuacctUsage(priv->cgroup, &cpu_time);
- if (ret < 0) {
- virReportSystemError(-ret, "%s", _("unable to get cpu
account"));
- return -1;
- }
-
- if (virTypedParameterAssign(¶ms[0], VIR_DOMAIN_CPU_STATS_CPUTIME,
- VIR_TYPED_PARAM_ULLONG, cpu_time) < 0)
- return -1;
-
- if (nparams > 1) {
- unsigned long long user;
- unsigned long long sys;
-
- ret = virCgroupGetCpuacctStat(priv->cgroup, &user, &sys);
- if (ret < 0) {
- virReportSystemError(-ret, "%s", _("unable to get cpu
account"));
- return -1;
- }
-
- if (virTypedParameterAssign(¶ms[1],
- VIR_DOMAIN_CPU_STATS_USERTIME,
- VIR_TYPED_PARAM_ULLONG, user) < 0)
- return -1;
- if (nparams > 2 &&
- virTypedParameterAssign(¶ms[2],
- VIR_DOMAIN_CPU_STATS_SYSTEMTIME,
- VIR_TYPED_PARAM_ULLONG, sys) < 0)
- return -1;
-
- if (nparams > QEMU_NB_TOTAL_CPU_STAT_PARAM)
- nparams = QEMU_NB_TOTAL_CPU_STAT_PARAM;
- }
-
- return nparams;
-}
-
/* This function gets the sums of cpu time consumed by all vcpus.
* For example, if there are 4 physical cpus, and 2 vcpus in a domain,
* then for each vcpu, the cpuacct.usage_percpu looks like this:
@@ -15552,7 +15501,8 @@ qemuDomainGetCPUStats(virDomainPtr domain,
}
if (start_cpu == -1)
- ret = qemuDomainGetTotalcpuStats(vm, params, nparams);
+ ret = virCgroupGetDomainTotalCpuStats(priv->cgroup,
+ params, nparams);
else
ret = qemuDomainGetPercpuStats(vm, params, nparams,
start_cpu, ncpus);
diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index 83fcefc..66045fb 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -51,11 +51,14 @@
#include "virhashcode.h"
#include "virstring.h"
#include "virsystemd.h"
+#include "virtypedparam.h"
#define CGROUP_MAX_VAL 512
#define VIR_FROM_THIS VIR_FROM_CGROUP
+#define CGROUP_NB_TOTAL_CPU_STAT_PARAM 3
+
#if defined(__linux__) && defined(HAVE_GETMNTENT_R) && \
defined(_DIRENT_HAVE_D_TYPE) && defined(_SC_CLK_TCK)
# define VIR_CGROUP_SUPPORTED
@@ -2629,6 +2632,56 @@ virCgroupDenyDevicePath(virCgroupPtr group, const char *path, int
perms)
}
+
+int
+virCgroupGetDomainTotalCpuStats(virCgroupPtr group,
+ virTypedParameterPtr params,
+ int nparams)
+{
+ unsigned long long cpu_time;
+ int ret;
+
+ if (nparams == 0) /* return supported number of params */
+ return CGROUP_NB_TOTAL_CPU_STAT_PARAM;
+ /* entry 0 is cputime */
+ ret = virCgroupGetCpuacctUsage(group, &cpu_time);
+ if (ret < 0) {
+ virReportSystemError(-ret, "%s", _("unable to get cpu
account"));
+ return -1;
+ }
+
+ if (virTypedParameterAssign(¶ms[0], VIR_DOMAIN_CPU_STATS_CPUTIME,
+ VIR_TYPED_PARAM_ULLONG, cpu_time) < 0)
+ return -1;
+
+ if (nparams > 1) {
+ unsigned long long user;
+ unsigned long long sys;
+
+ ret = virCgroupGetCpuacctStat(group, &user, &sys);
+ if (ret < 0) {
+ virReportSystemError(-ret, "%s", _("unable to get cpu
account"));
+ return -1;
+ }
+
+ if (virTypedParameterAssign(¶ms[1],
+ VIR_DOMAIN_CPU_STATS_USERTIME,
+ VIR_TYPED_PARAM_ULLONG, user) < 0)
+ return -1;
+ if (nparams > 2 &&
+ virTypedParameterAssign(¶ms[2],
+ VIR_DOMAIN_CPU_STATS_SYSTEMTIME,
+ VIR_TYPED_PARAM_ULLONG, sys) < 0)
+ return -1;
+
+ if (nparams > CGROUP_NB_TOTAL_CPU_STAT_PARAM)
+ nparams = CGROUP_NB_TOTAL_CPU_STAT_PARAM;
+ }
+
+ return nparams;
+}
+
+
int
virCgroupSetCpuShares(virCgroupPtr group, unsigned long long shares)
{
diff --git a/src/util/vircgroup.h b/src/util/vircgroup.h
index cd6b27b..b42bddc 100644
--- a/src/util/vircgroup.h
+++ b/src/util/vircgroup.h
@@ -185,6 +185,11 @@ int virCgroupDenyDevicePath(virCgroupPtr group,
const char *path,
int perms);
+int
+virCgroupGetDomainTotalCpuStats(virCgroupPtr group,
+ virTypedParameterPtr params,
+ int nparams);
+
int virCgroupSetCpuShares(virCgroupPtr group, unsigned long long shares);
int virCgroupGetCpuShares(virCgroupPtr group, unsigned long long *shares);
--
1.8.4
3:58 a.m.
New subject: [libvirt] [PATCHv2 3/6] Make qemuGetDomainTotalCPUStats a virCgroup function.
On 01/20/2014 07:12 PM, Thorsten Behrens wrote:
To reuse this from other drivers, like lxc.
---
Notes on v2:
- renamed to proper camel case: virCgroupGetDomainTotalCpuStats
src/libvirt_private.syms | 1 +
src/qemu/qemu_driver.c | 54 ++----------------------------------------------
src/util/vircgroup.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++
src/util/vircgroup.h | 5 +++++
4 files changed, 61 insertions(+), 52 deletions(-)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index e4815b3..97198d1 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1013,6 +1013,7 @@ virCgroupGetCpuCfsQuota;
virCgroupGetCpusetCpus;
virCgroupGetCpusetMems;
virCgroupGetCpuShares;
+virCgroupGetDomainTotalCpuStats;
virCgroupGetFreezerState;
virCgroupGetMemoryHardLimit;
virCgroupGetMemorySoftLimit;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index ebb77dc..a1e45c3 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -105,7 +105,6 @@
#define QEMU_NB_NUMA_PARAM 2
-#define QEMU_NB_TOTAL_CPU_STAT_PARAM 3
#define QEMU_NB_PER_CPU_STAT_PARAM 2
#define QEMU_SCHED_MIN_PERIOD 1000LL
@@ -15304,56 +15303,6 @@ cleanup:
return ret;
}
-/* qemuDomainGetCPUStats() with start_cpu == -1 */
-static int
-qemuDomainGetTotalcpuStats(virDomainObjPtr vm,
- virTypedParameterPtr params,
- int nparams)
-{
- unsigned long long cpu_time;
- int ret;
- qemuDomainObjPrivatePtr priv = vm->privateData;
-
- if (nparams == 0) /* return supported number of params */
- return QEMU_NB_TOTAL_CPU_STAT_PARAM;
- /* entry 0 is cputime */
- ret = virCgroupGetCpuacctUsage(priv->cgroup, &cpu_time);
- if (ret < 0) {
- virReportSystemError(-ret, "%s", _("unable to get cpu
account"));
- return -1;
- }
-
- if (virTypedParameterAssign(¶ms[0], VIR_DOMAIN_CPU_STATS_CPUTIME,
- VIR_TYPED_PARAM_ULLONG, cpu_time) < 0)
- return -1;
-
- if (nparams > 1) {
- unsigned long long user;
- unsigned long long sys;
-
- ret = virCgroupGetCpuacctStat(priv->cgroup, &user, &sys);
- if (ret < 0) {
- virReportSystemError(-ret, "%s", _("unable to get cpu
account"));
- return -1;
- }
-
- if (virTypedParameterAssign(¶ms[1],
- VIR_DOMAIN_CPU_STATS_USERTIME,
- VIR_TYPED_PARAM_ULLONG, user) < 0)
- return -1;
- if (nparams > 2 &&
- virTypedParameterAssign(¶ms[2],
- VIR_DOMAIN_CPU_STATS_SYSTEMTIME,
- VIR_TYPED_PARAM_ULLONG, sys) < 0)
- return -1;
-
- if (nparams > QEMU_NB_TOTAL_CPU_STAT_PARAM)
- nparams = QEMU_NB_TOTAL_CPU_STAT_PARAM;
- }
-
- return nparams;
-}
-
/* This function gets the sums of cpu time consumed by all vcpus.
* For example, if there are 4 physical cpus, and 2 vcpus in a domain,
* then for each vcpu, the cpuacct.usage_percpu looks like this:
@@ -15552,7 +15501,8 @@ qemuDomainGetCPUStats(virDomainPtr domain,
}
if (start_cpu == -1)
- ret = qemuDomainGetTotalcpuStats(vm, params, nparams);
+ ret = virCgroupGetDomainTotalCpuStats(priv->cgroup,
+ params, nparams);
else
ret = qemuDomainGetPercpuStats(vm, params, nparams,
start_cpu, ncpus);
diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index 83fcefc..66045fb 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -51,11 +51,14 @@
#include "virhashcode.h"
#include "virstring.h"
#include "virsystemd.h"
+#include "virtypedparam.h"
#define CGROUP_MAX_VAL 512
#define VIR_FROM_THIS VIR_FROM_CGROUP
+#define CGROUP_NB_TOTAL_CPU_STAT_PARAM 3
+
#if defined(__linux__) && defined(HAVE_GETMNTENT_R) && \
defined(_DIRENT_HAVE_D_TYPE) && defined(_SC_CLK_TCK)
# define VIR_CGROUP_SUPPORTED
@@ -2629,6 +2632,56 @@ virCgroupDenyDevicePath(virCgroupPtr group, const char *path, int
perms)
}
+
+int
+virCgroupGetDomainTotalCpuStats(virCgroupPtr group,
+ virTypedParameterPtr params,
+ int nparams)
+{
+ unsigned long long cpu_time;
+ int ret;
+
+ if (nparams == 0) /* return supported number of params */
+ return CGROUP_NB_TOTAL_CPU_STAT_PARAM;
+ /* entry 0 is cputime */
+ ret = virCgroupGetCpuacctUsage(group, &cpu_time);
+ if (ret < 0) {
+ virReportSystemError(-ret, "%s", _("unable to get cpu
account"));
+ return -1;
+ }
+
+ if (virTypedParameterAssign(¶ms[0], VIR_DOMAIN_CPU_STATS_CPUTIME,
+ VIR_TYPED_PARAM_ULLONG, cpu_time) < 0)
+ return -1;
+
+ if (nparams > 1) {
+ unsigned long long user;
+ unsigned long long sys;
+
+ ret = virCgroupGetCpuacctStat(group, &user, &sys);
+ if (ret < 0) {
+ virReportSystemError(-ret, "%s", _("unable to get cpu
account"));
+ return -1;
+ }
+
+ if (virTypedParameterAssign(¶ms[1],
+ VIR_DOMAIN_CPU_STATS_USERTIME,
+ VIR_TYPED_PARAM_ULLONG, user) < 0)
+ return -1;
+ if (nparams > 2 &&
+ virTypedParameterAssign(¶ms[2],
+ VIR_DOMAIN_CPU_STATS_SYSTEMTIME,
+ VIR_TYPED_PARAM_ULLONG, sys) < 0)
+ return -1;
+
+ if (nparams > CGROUP_NB_TOTAL_CPU_STAT_PARAM)
+ nparams = CGROUP_NB_TOTAL_CPU_STAT_PARAM;
+ }
+
+ return nparams;
+}
+
+
int
virCgroupSetCpuShares(virCgroupPtr group, unsigned long long shares)
{
diff --git a/src/util/vircgroup.h b/src/util/vircgroup.h
index cd6b27b..b42bddc 100644
--- a/src/util/vircgroup.h
+++ b/src/util/vircgroup.h
@@ -185,6 +185,11 @@ int virCgroupDenyDevicePath(virCgroupPtr group,
const char *path,
int perms);
+int
+virCgroupGetDomainTotalCpuStats(virCgroupPtr group,
+ virTypedParameterPtr params,
+ int nparams);
+
int virCgroupSetCpuShares(virCgroupPtr group, unsigned long long shares);
int virCgroupGetCpuShares(virCgroupPtr group, unsigned long long *shares);
Just rename and move,
ACK
thanks!
5:12 a.m.
New subject: [libvirt] [PATCHv2 4/6] Implement domainGetCPUStats for lxc driver.
---
Notes on v2:
- elided extra memset and leftover loop var n
- api slot comment references 1.2.2 now
src/lxc/lxc_driver.c | 128 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 128 insertions(+)
diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index 8cf8e48..19426f5 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -75,6 +75,8 @@
#define LXC_NB_MEM_PARAM 3
+#define LXC_NB_PER_CPU_STAT_PARAM 1
+
static int lxcStateInitialize(bool privileged,
virStateInhibitCallback callback,
@@ -4775,6 +4777,131 @@ cleanup:
}
+static int
+lxcDomainGetPercpuStats(virDomainObjPtr vm,
+ virTypedParameterPtr params,
+ unsigned int nparams,
+ int start_cpu,
+ unsigned int ncpus)
+{
+ int rv = -1;
+ size_t i;
+ int id, max_id;
+ char *pos;
+ char *buf = NULL;
+ virLXCDomainObjPrivatePtr priv = vm->privateData;
+ virTypedParameterPtr ent;
+ int param_idx;
+ unsigned long long cpu_time;
+
+ /* TODO: share api contract code with other drivers here */
+
+ /* return the number of supported params */
+ if (nparams == 0 && ncpus != 0)
+ return LXC_NB_PER_CPU_STAT_PARAM;
+
+ /* To parse account file, we need to know how many cpus are present. */
+ max_id = nodeGetCPUCount();
+ if (max_id < 0)
+ return rv;
+
+ if (ncpus == 0) { /* returns max cpu ID */
+ rv = max_id;
+ goto cleanup;
+ }
+
+ if (start_cpu > max_id) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _("start_cpu %d larger than maximum of %d"),
+ start_cpu, max_id);
+ goto cleanup;
+ }
+
+ /* we get percpu cputime accounting info. */
+ if (virCgroupGetCpuacctPercpuUsage(priv->cgroup, &buf))
+ goto cleanup;
+ pos = buf;
+
+ /* return percpu cputime in index 0 */
+ param_idx = 0;
+
+ /* number of cpus to compute */
+ if (start_cpu >= max_id - ncpus)
+ id = max_id - 1;
+ else
+ id = start_cpu + ncpus - 1;
+
+ for (i = 0; i <= id; i++) {
+ if (virStrToLong_ull(pos, &pos, 10, &cpu_time) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("cpuacct parse error"));
+ goto cleanup;
+ }
+ if (i < start_cpu)
+ continue;
+ ent = ¶ms[(i - start_cpu) * nparams + param_idx];
+ if (virTypedParameterAssign(ent, VIR_DOMAIN_CPU_STATS_CPUTIME,
+ VIR_TYPED_PARAM_ULLONG, cpu_time) < 0)
+ goto cleanup;
+ }
+
+ rv = nparams;
+
+cleanup:
+ VIR_FREE(buf);
+ return rv;
+}
+
+
+static int
+lxcDomainGetCPUStats(virDomainPtr dom,
+ virTypedParameterPtr params,
+ unsigned int nparams,
+ int start_cpu,
+ unsigned int ncpus,
+ unsigned int flags)
+{
+ virDomainObjPtr vm = NULL;
+ int ret = -1;
+ bool isActive;
+ virLXCDomainObjPrivatePtr priv;
+
+ virCheckFlags(VIR_TYPED_PARAM_STRING_OKAY, -1);
+
+ if (!(vm = lxcDomObjFromDomain(dom)))
+ return ret;
+
+ priv = vm->privateData;
+
+ if (virDomainGetCPUStatsEnsureACL(dom->conn, vm->def) < 0)
+ goto cleanup;
+
+ isActive = virDomainObjIsActive(vm);
+ if (!isActive) {
+ virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+ _("domain is not running"));
+ goto cleanup;
+ }
+
+ if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPUACCT)) {
+ virReportError(VIR_ERR_OPERATION_INVALID,
+ "%s", _("cgroup CPUACCT controller is not
mounted"));
+ goto cleanup;
+ }
+
+ if (start_cpu == -1)
+ ret = virCgroupGetDomainTotalCpuStats(priv->cgroup,
+ params, nparams);
+ else
+ ret = lxcDomainGetPercpuStats(vm, params, nparams,
+ start_cpu, ncpus);
+cleanup:
+ if (vm)
+ virObjectUnlock(vm);
+ return ret;
+}
+
+
/* Function Tables */
static virDriver lxcDriver = {
.no = VIR_DRV_LXC,
@@ -4852,6 +4979,7 @@ static virDriver lxcDriver = {
.nodeSuspendForDuration = lxcNodeSuspendForDuration, /* 0.9.8 */
.domainSetMetadata = lxcDomainSetMetadata, /* 1.1.3 */
.domainGetMetadata = lxcDomainGetMetadata, /* 1.1.3 */
+ .domainGetCPUStats = lxcDomainGetCPUStats, /* 1.2.2 */
.nodeGetMemoryParameters = lxcNodeGetMemoryParameters, /* 0.10.2 */
.nodeSetMemoryParameters = lxcNodeSetMemoryParameters, /* 0.10.2 */
.domainSendProcessSignal = lxcDomainSendProcessSignal, /* 1.0.1 */
--
1.8.4
4:17 a.m.
New subject: [libvirt] [PATCHv2 4/6] Implement domainGetCPUStats for lxc driver.
On 01/20/2014 07:12 PM, Thorsten Behrens wrote:
---
Notes on v2:
- elided extra memset and leftover loop var n
- api slot comment references 1.2.2 now
src/lxc/lxc_driver.c | 128 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 128 insertions(+)
diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index 8cf8e48..19426f5 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -75,6 +75,8 @@
#define LXC_NB_MEM_PARAM 3
+#define LXC_NB_PER_CPU_STAT_PARAM 1
+
static int lxcStateInitialize(bool privileged,
virStateInhibitCallback callback,
@@ -4775,6 +4777,131 @@ cleanup:
}
+static int
+lxcDomainGetPercpuStats(virDomainObjPtr vm,
+ virTypedParameterPtr params,
+ unsigned int nparams,
+ int start_cpu,
+ unsigned int ncpus)
+{
+ int rv = -1;
+ size_t i;
+ int id, max_id;
+ char *pos;
+ char *buf = NULL;
+ virLXCDomainObjPrivatePtr priv = vm->privateData;
+ virTypedParameterPtr ent;
+ int param_idx;
+ unsigned long long cpu_time;
+
+ /* TODO: share api contract code with other drivers here */
+
+ /* return the number of supported params */
+ if (nparams == 0 && ncpus != 0)
+ return LXC_NB_PER_CPU_STAT_PARAM;
+
+ /* To parse account file, we need to know how many cpus are present. */
+ max_id = nodeGetCPUCount();
+ if (max_id < 0)
+ return rv;
+
+ if (ncpus == 0) { /* returns max cpu ID */
+ rv = max_id;
+ goto cleanup;
+ }
+
+ if (start_cpu > max_id) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _("start_cpu %d larger than maximum of %d"),
+ start_cpu, max_id);
+ goto cleanup;
+ }
+
+ /* we get percpu cputime accounting info. */
+ if (virCgroupGetCpuacctPercpuUsage(priv->cgroup, &buf))
+ goto cleanup;
+ pos = buf;
+
+ /* return percpu cputime in index 0 */
+ param_idx = 0;
+
+ /* number of cpus to compute */
+ if (start_cpu >= max_id - ncpus)
+ id = max_id - 1;
+ else
+ id = start_cpu + ncpus - 1;
+
+ for (i = 0; i <= id; i++) {
+ if (virStrToLong_ull(pos, &pos, 10, &cpu_time) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("cpuacct parse error"));
+ goto cleanup;
+ }
+ if (i < start_cpu)
+ continue;
+ ent = ¶ms[(i - start_cpu) * nparams + param_idx];
+ if (virTypedParameterAssign(ent, VIR_DOMAIN_CPU_STATS_CPUTIME,
+ VIR_TYPED_PARAM_ULLONG, cpu_time) < 0)
+ goto cleanup;
+ }
+
+ rv = nparams;
+
+cleanup:
+ VIR_FREE(buf);
+ return rv;
+}
+
+
+static int
+lxcDomainGetCPUStats(virDomainPtr dom,
+ virTypedParameterPtr params,
+ unsigned int nparams,
+ int start_cpu,
+ unsigned int ncpus,
+ unsigned int flags)
+{
+ virDomainObjPtr vm = NULL;
+ int ret = -1;
+ bool isActive;
+ virLXCDomainObjPrivatePtr priv;
+
+ virCheckFlags(VIR_TYPED_PARAM_STRING_OKAY, -1);
+
+ if (!(vm = lxcDomObjFromDomain(dom)))
+ return ret;
+
+ priv = vm->privateData;
+
+ if (virDomainGetCPUStatsEnsureACL(dom->conn, vm->def) < 0)
+ goto cleanup;
+
+ isActive = virDomainObjIsActive(vm);
+ if (!isActive) {
+ virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+ _("domain is not running"));
+ goto cleanup;
+ }
+
+ if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPUACCT)) {
+ virReportError(VIR_ERR_OPERATION_INVALID,
+ "%s", _("cgroup CPUACCT controller is not
mounted"));
+ goto cleanup;
+ }
+
+ if (start_cpu == -1)
+ ret = virCgroupGetDomainTotalCpuStats(priv->cgroup,
+ params, nparams);
+ else
+ ret = lxcDomainGetPercpuStats(vm, params, nparams,
+ start_cpu, ncpus);
+cleanup:
+ if (vm)
+ virObjectUnlock(vm);
+ return ret;
+}
+
+
/* Function Tables */
static virDriver lxcDriver = {
.no = VIR_DRV_LXC,
@@ -4852,6 +4979,7 @@ static virDriver lxcDriver = {
.nodeSuspendForDuration = lxcNodeSuspendForDuration, /* 0.9.8 */
.domainSetMetadata = lxcDomainSetMetadata, /* 1.1.3 */
.domainGetMetadata = lxcDomainGetMetadata, /* 1.1.3 */
+ .domainGetCPUStats = lxcDomainGetCPUStats, /* 1.2.2 */
.nodeGetMemoryParameters = lxcNodeGetMemoryParameters, /* 0.10.2 */
.nodeSetMemoryParameters = lxcNodeSetMemoryParameters, /* 0.10.2 */
.domainSendProcessSignal = lxcDomainSendProcessSignal, /* 1.0.1 */
Looks good to me
ACK
thanks!
5:12 a.m.
New subject: [libvirt] [PATCHv2 5/6] Implemet lxcDomainBlockStats for lxc driver
---
Notes on v2:
- works as-is, will send lxcDomainBlockStatsFlags patch separately
src/lxc/lxc_driver.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 51 insertions(+)
diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index 19426f5..bf6fd5c 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -2023,6 +2023,56 @@ lxcDomainGetSchedulerParameters(virDomainPtr domain,
static int
+lxcDomainBlockStats(virDomainPtr dom,
+ const char *path,
+ struct _virDomainBlockStats *stats)
+{
+ int ret = -1, idx;
+ virDomainObjPtr vm;
+ virDomainDiskDefPtr disk = NULL;
+ virLXCDomainObjPrivatePtr priv;
+
+ if (!(vm = lxcDomObjFromDomain(dom)))
+ return ret;
+
+ priv = vm->privateData;
+
+ if (virDomainBlockStatsEnsureACL(dom->conn, vm->def) < 0)
+ goto cleanup;
+
+ if (!virDomainObjIsActive(vm)) {
+ virReportError(VIR_ERR_OPERATION_INVALID,
+ "%s", _("domain is not running"));
+ goto cleanup;
+ }
+
+ if ((idx = virDomainDiskIndexByName(vm->def, path, false)) < 0) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _("invalid path: %s"), path);
+ goto cleanup;
+ }
+ disk = vm->def->disks[idx];
+
+ if (!disk->info.alias) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("missing disk device alias name for %s"),
disk->dst);
+ goto cleanup;
+ }
+
+ ret = virCgroupGetBlkioIoDeviceServiced(priv->cgroup,
+ disk->info.alias,
+ &stats->rd_bytes,
+ &stats->wr_bytes,
+ &stats->rd_req,
+ &stats->wr_req);
+cleanup:
+ if (vm)
+ virObjectUnlock(vm);
+ return ret;
+}
+
+
+static int
lxcDomainSetBlkioParameters(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
@@ -4958,6 +5008,7 @@ static virDriver lxcDriver = {
.domainGetSchedulerParametersFlags = lxcDomainGetSchedulerParametersFlags, /* 0.9.2
*/
.domainSetSchedulerParameters = lxcDomainSetSchedulerParameters, /* 0.5.0 */
.domainSetSchedulerParametersFlags = lxcDomainSetSchedulerParametersFlags, /* 0.9.2
*/
+ .domainBlockStats = lxcDomainBlockStats, /* 0.4.1 */
.domainInterfaceStats = lxcDomainInterfaceStats, /* 0.7.3 */
.domainMemoryStats = lxcDomainMemoryStats, /* 1.2.2 */
.nodeGetCPUStats = lxcNodeGetCPUStats, /* 0.9.3 */
--
1.8.4
4:19 a.m.
New subject: [libvirt] [PATCHv2 5/6] Implemet lxcDomainBlockStats for lxc driver
On 01/20/2014 07:12 PM, Thorsten Behrens wrote:
---
Notes on v2:
- works as-is, will send lxcDomainBlockStatsFlags patch separately
src/lxc/lxc_driver.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 51 insertions(+)
diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index 19426f5..bf6fd5c 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -2023,6 +2023,56 @@ lxcDomainGetSchedulerParameters(virDomainPtr domain,
static int
+lxcDomainBlockStats(virDomainPtr dom,
+ const char *path,
+ struct _virDomainBlockStats *stats)
+{
+ int ret = -1, idx;
+ virDomainObjPtr vm;
+ virDomainDiskDefPtr disk = NULL;
+ virLXCDomainObjPrivatePtr priv;
+
+ if (!(vm = lxcDomObjFromDomain(dom)))
+ return ret;
+
+ priv = vm->privateData;
+
+ if (virDomainBlockStatsEnsureACL(dom->conn, vm->def) < 0)
+ goto cleanup;
+
+ if (!virDomainObjIsActive(vm)) {
+ virReportError(VIR_ERR_OPERATION_INVALID,
+ "%s", _("domain is not running"));
+ goto cleanup;
+ }
+
+ if ((idx = virDomainDiskIndexByName(vm->def, path, false)) < 0) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _("invalid path: %s"), path);
+ goto cleanup;
+ }
+ disk = vm->def->disks[idx];
+
+ if (!disk->info.alias) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("missing disk device alias name for %s"),
disk->dst);
+ goto cleanup;
+ }
+
+ ret = virCgroupGetBlkioIoDeviceServiced(priv->cgroup,
+ disk->info.alias,
+ &stats->rd_bytes,
+ &stats->wr_bytes,
+ &stats->rd_req,
+ &stats->wr_req);
+cleanup:
+ if (vm)
+ virObjectUnlock(vm);
+ return ret;
+}
+
+
+static int
lxcDomainSetBlkioParameters(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
@@ -4958,6 +5008,7 @@ static virDriver lxcDriver = {
.domainGetSchedulerParametersFlags = lxcDomainGetSchedulerParametersFlags, /* 0.9.2
*/
.domainSetSchedulerParameters = lxcDomainSetSchedulerParameters, /* 0.5.0 */
.domainSetSchedulerParametersFlags = lxcDomainSetSchedulerParametersFlags, /* 0.9.2
*/
+ .domainBlockStats = lxcDomainBlockStats, /* 0.4.1 */
this should be 1.2.2
.domainInterfaceStats = lxcDomainInterfaceStats, /* 0.7.3 */
.domainMemoryStats = lxcDomainMemoryStats, /* 1.2.2 */
.nodeGetCPUStats = lxcNodeGetCPUStats, /* 0.9.3 */
ACK
thanks!
5:12 a.m.
New subject: [libvirt] [PATCHv2 6/6] Widening API change - accept empty path for virDomainBlockStats
And provide domain summary stat in that case, for lxc backend.
Use case is a container inheriting all devices from the host,
e.g. when doing application containerization.
---
Notes on v2:
- adapted virDomainBlockStats docs
- adapted virsh domblkstat docs
- made virsh actually accept empty disk argument
- pedaling back a bit on the API change - accepting a NULL ptr
for the disk arg would need changing the remote protocol, so
better just take the empty string. Makes this less invasive even.
src/libvirt.c | 8 ++++++--
src/lxc/lxc_driver.c | 10 ++++++++++
tools/virsh-domain-monitor.c | 11 ++++++++---
tools/virsh.pod | 5 +++--
4 files changed, 27 insertions(+), 7 deletions(-)
diff --git a/src/libvirt.c b/src/libvirt.c
index 87a4d46..ead0813 100644
--- a/src/libvirt.c
+++ b/src/libvirt.c
@@ -7781,7 +7781,9 @@ error:
* an unambiguous source name of the block device (the <source
* file='...'/> sub-element, such as "/path/to/image"). Valid
names
* can be found by calling virDomainGetXMLDesc() and inspecting
- * elements within //domain/devices/disk.
+ * elements within //domain/devices/disk. Some drivers might also
+ * accept the empty string for the @disk parameter, and then yield
+ * summary stats for the entire domain.
*
* Domains may have more than one block device. To get stats for
* each you should make multiple calls to this function.
@@ -7847,7 +7849,9 @@ error:
* an unambiguous source name of the block device (the <source
* file='...'/> sub-element, such as "/path/to/image"). Valid
names
* can be found by calling virDomainGetXMLDesc() and inspecting
- * elements within //domain/devices/disk.
+ * elements within //domain/devices/disk. Some drivers might also
+ * accept the empty string for the @disk parameter, and then yield
+ * summary stats for the entire domain.
*
* Domains may have more than one block device. To get stats for
* each you should make multiple calls to this function.
diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index bf6fd5c..31f1625 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -2046,6 +2046,16 @@ lxcDomainBlockStats(virDomainPtr dom,
goto cleanup;
}
+ if (!*path) {
+ /* empty path - return entire domain blkstats instead */
+ ret = virCgroupGetBlkioIoServiced(priv->cgroup,
+ &stats->rd_bytes,
+ &stats->wr_bytes,
+ &stats->rd_req,
+ &stats->wr_req);
+ goto cleanup;
+ }
+
if ((idx = virDomainDiskIndexByName(vm->def, path, false)) < 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("invalid path: %s"), path);
diff --git a/tools/virsh-domain-monitor.c b/tools/virsh-domain-monitor.c
index b29b82a..6be253f 100644
--- a/tools/virsh-domain-monitor.c
+++ b/tools/virsh-domain-monitor.c
@@ -880,7 +880,7 @@ static const vshCmdOptDef opts_domblkstat[] = {
},
{.name = "device",
.type = VSH_OT_DATA,
- .flags = VSH_OFLAG_REQ,
+ .flags = VSH_OFLAG_EMPTY_OK,
.help = N_("block device")
},
{.name = "human",
@@ -946,8 +946,13 @@ cmdDomblkstat(vshControl *ctl, const vshCmd *cmd)
if (!(dom = vshCommandOptDomain(ctl, cmd, &name)))
return false;
- if (vshCommandOptStringReq(ctl, cmd, "device", &device) < 0)
- goto cleanup;
+ /* device argument is optional now. if it's missing, supply empty
+ string to denote 'all devices'. A NULL device arg would violate
+ API contract.
+ */
+ rc = vshCommandOptStringReq(ctl, cmd, "device", &device); /* and ignore
rc */
+ if (!device)
+ device = "";
rc = virDomainBlockStatsFlags(dom, device, NULL, &nparams, 0);
diff --git a/tools/virsh.pod b/tools/virsh.pod
index 3534b54..c3ca016 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -616,12 +616,13 @@ If I<--graceful> is specified, don't resort to extreme
measures
(e.g. SIGKILL) when the guest doesn't stop after a reasonable timeout;
return an error instead.
-=item B<domblkstat> I<domain> I<block-device> [I<--human>]
+=item B<domblkstat> I<domain> [I<block-device>] [I<--human>]
Get device block stats for a running domain. A I<block-device> corresponds
to a unique target name (<target dev='name'/>) or source file (<source
file='name'/>) for one of the disk devices attached to I<domain> (see
-also B<domblklist> for listing these names).
+also B<domblklist> for listing these names). On a lxc domain, omitting the
+I<block-device> yields device block stats summarily for the entire domain.
Use I<--human> for a more human readable output.
--
1.8.4
4:24 a.m.
New subject: [libvirt] [PATCHv2 6/6] Widening API change - accept empty path for virDomainBlockStats
On 01/20/2014 07:12 PM, Thorsten Behrens wrote:
And provide domain summary stat in that case, for lxc backend.
Use case is a container inheriting all devices from the host,
e.g. when doing application containerization.
---
Notes on v2:
- adapted virDomainBlockStats docs
- adapted virsh domblkstat docs
- made virsh actually accept empty disk argument
- pedaling back a bit on the API change - accepting a NULL ptr
for the disk arg would need changing the remote protocol, so
better just take the empty string. Makes this less invasive even.
src/libvirt.c | 8 ++++++--
src/lxc/lxc_driver.c | 10 ++++++++++
tools/virsh-domain-monitor.c | 11 ++++++++---
tools/virsh.pod | 5 +++--
4 files changed, 27 insertions(+), 7 deletions(-)
diff --git a/src/libvirt.c b/src/libvirt.c
index 87a4d46..ead0813 100644
--- a/src/libvirt.c
+++ b/src/libvirt.c
@@ -7781,7 +7781,9 @@ error:
* an unambiguous source name of the block device (the <source
* file='...'/> sub-element, such as "/path/to/image"). Valid
names
* can be found by calling virDomainGetXMLDesc() and inspecting
- * elements within //domain/devices/disk.
+ * elements within //domain/devices/disk. Some drivers might also
+ * accept the empty string for the @disk parameter, and then yield
+ * summary stats for the entire domain.
*
* Domains may have more than one block device. To get stats for
* each you should make multiple calls to this function.
@@ -7847,7 +7849,9 @@ error:
* an unambiguous source name of the block device (the <source
* file='...'/> sub-element, such as "/path/to/image"). Valid
names
* can be found by calling virDomainGetXMLDesc() and inspecting
- * elements within //domain/devices/disk.
+ * elements within //domain/devices/disk. Some drivers might also
+ * accept the empty string for the @disk parameter, and then yield
+ * summary stats for the entire domain.
*
* Domains may have more than one block device. To get stats for
* each you should make multiple calls to this function.
diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index bf6fd5c..31f1625 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -2046,6 +2046,16 @@ lxcDomainBlockStats(virDomainPtr dom,
goto cleanup;
}
+ if (!*path) {
+ /* empty path - return entire domain blkstats instead */
+ ret = virCgroupGetBlkioIoServiced(priv->cgroup,
+ &stats->rd_bytes,
+ &stats->wr_bytes,
+ &stats->rd_req,
+ &stats->wr_req);
+ goto cleanup;
+ }
+
if ((idx = virDomainDiskIndexByName(vm->def, path, false)) < 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("invalid path: %s"), path);
diff --git a/tools/virsh-domain-monitor.c b/tools/virsh-domain-monitor.c
index b29b82a..6be253f 100644
--- a/tools/virsh-domain-monitor.c
+++ b/tools/virsh-domain-monitor.c
@@ -880,7 +880,7 @@ static const vshCmdOptDef opts_domblkstat[] = {
},
{.name = "device",
.type = VSH_OT_DATA,
- .flags = VSH_OFLAG_REQ,
+ .flags = VSH_OFLAG_EMPTY_OK,
.help = N_("block device")
},
{.name = "human",
@@ -946,8 +946,13 @@ cmdDomblkstat(vshControl *ctl, const vshCmd *cmd)
if (!(dom = vshCommandOptDomain(ctl, cmd, &name)))
return false;
- if (vshCommandOptStringReq(ctl, cmd, "device", &device) < 0)
- goto cleanup;
+ /* device argument is optional now. if it's missing, supply empty
+ string to denote 'all devices'. A NULL device arg would violate
+ API contract.
+ */
+ rc = vshCommandOptStringReq(ctl, cmd, "device", &device); /* and
ignore rc */
+ if (!device)
+ device = "";
rc = virDomainBlockStatsFlags(dom, device, NULL, &nparams, 0);
diff --git a/tools/virsh.pod b/tools/virsh.pod
index 3534b54..c3ca016 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -616,12 +616,13 @@ If I<--graceful> is specified, don't resort to extreme
measures
(e.g. SIGKILL) when the guest doesn't stop after a reasonable timeout;
return an error instead.
-=item B<domblkstat> I<domain> I<block-device> [I<--human>]
+=item B<domblkstat> I<domain> [I<block-device>] [I<--human>]
Get device block stats for a running domain. A I<block-device> corresponds
to a unique target name (<target dev='name'/>) or source file (<source
file='name'/>) for one of the disk devices attached to I<domain> (see
-also B<domblklist> for listing these names).
+also B<domblklist> for listing these names). On a lxc domain, omitting the
+I<block-device> yields device block stats summarily for the entire domain.
Use I<--human> for a more human readable output.
Looks good to me
ACK
thanks!
5:23 a.m.
New subject: [libvirt] [PATCH] Implement lxcDomainBlockStatsFlags for lxc driver
---
src/lxc/lxc_driver.c | 124 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 124 insertions(+)
diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index 7fa9612..57d8fcb 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -77,6 +77,8 @@
#define LXC_NB_MEM_PARAM 3
#define LXC_NB_PER_CPU_STAT_PARAM 1
+#define LXC_NB_DOMAIN_BLOCK_STAT_PARAM 4
+
static int lxcStateInitialize(bool privileged,
virStateInhibitCallback callback,
@@ -2262,6 +2264,127 @@ cleanup:
static int
+lxcDomainBlockStatsFlags(virDomainPtr dom,
+ const char * path,
+ virTypedParameterPtr params,
+ int * nparams,
+ unsigned int flags)
+{
+ int tmp, ret = -1, idx;
+ virDomainObjPtr vm;
+ virDomainDiskDefPtr disk = NULL;
+ virLXCDomainObjPrivatePtr priv;
+ long long rd_req, rd_bytes, wr_req, wr_bytes;
+ virTypedParameterPtr param;
+
+ virCheckFlags(VIR_TYPED_PARAM_STRING_OKAY, -1);
+
+ /* We don't return strings, and thus trivially support this flag. */
+ flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
+
+ if (!params && !*nparams) {
+ *nparams = LXC_NB_DOMAIN_BLOCK_STAT_PARAM;
+ return 0;
+ }
+
+ if (!(vm = lxcDomObjFromDomain(dom)))
+ return ret;
+
+ priv = vm->privateData;
+
+ if (virDomainBlockStatsFlagsEnsureACL(dom->conn, vm->def) < 0)
+ goto cleanup;
+
+ if (!virDomainObjIsActive(vm)) {
+ virReportError(VIR_ERR_OPERATION_INVALID,
+ "%s", _("domain is not running"));
+ goto cleanup;
+ }
+
+ if (!*path) {
+ /* empty path - return entire domain blkstats instead */
+ if (virCgroupGetBlkioIoServiced(priv->cgroup,
+ &rd_bytes,
+ &wr_bytes,
+ &rd_req,
+ &wr_req) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ "%s", _("domain stats query failed"));
+ goto cleanup;
+ }
+ }
+ else {
+ if ((idx = virDomainDiskIndexByName(vm->def, path, false)) < 0) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _("invalid path: %s"), path);
+ goto cleanup;
+ }
+ disk = vm->def->disks[idx];
+
+ if (!disk->info.alias) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("missing disk device alias name for %s"),
disk->dst);
+ goto cleanup;
+ }
+
+ if (virCgroupGetBlkioIoDeviceServiced(priv->cgroup,
+ disk->info.alias,
+ &rd_bytes,
+ &wr_bytes,
+ &rd_req,
+ &wr_req) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ "%s", _("domain stats query failed"));
+ goto cleanup;
+ }
+ }
+
+ tmp = 0;
+ ret = -1;
+
+ if (tmp < *nparams && wr_bytes != -1) {
+ param = ¶ms[tmp];
+ if (virTypedParameterAssign(param, VIR_DOMAIN_BLOCK_STATS_WRITE_BYTES,
+ VIR_TYPED_PARAM_LLONG, wr_bytes) < 0)
+ goto cleanup;
+ tmp++;
+ }
+
+ if (tmp < *nparams && wr_req != -1) {
+ param = ¶ms[tmp];
+ if (virTypedParameterAssign(param, VIR_DOMAIN_BLOCK_STATS_WRITE_REQ,
+ VIR_TYPED_PARAM_LLONG, wr_req) < 0)
+ goto cleanup;
+ tmp++;
+ }
+
+ if (tmp < *nparams && rd_bytes != -1) {
+ param = ¶ms[tmp];
+ if (virTypedParameterAssign(param, VIR_DOMAIN_BLOCK_STATS_READ_BYTES,
+ VIR_TYPED_PARAM_LLONG, rd_bytes) < 0)
+ goto cleanup;
+ tmp++;
+ }
+
+ if (tmp < *nparams && rd_req != -1) {
+ param = ¶ms[tmp];
+ if (virTypedParameterAssign(param, VIR_DOMAIN_BLOCK_STATS_READ_REQ,
+ VIR_TYPED_PARAM_LLONG, rd_req) < 0)
+ goto cleanup;
+ tmp++;
+ }
+
+ ret = 0;
+ *nparams = tmp;
+
+cleanup:
+ if (vm)
+ virObjectUnlock(vm);
+ return ret;
+}
+
+
+static int
lxcDomainSetBlkioParameters(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
@@ -5642,6 +5765,7 @@ static virDriver lxcDriver = {
.domainSetSchedulerParameters = lxcDomainSetSchedulerParameters, /* 0.5.0 */
.domainSetSchedulerParametersFlags = lxcDomainSetSchedulerParametersFlags, /* 0.9.2
*/
.domainBlockStats = lxcDomainBlockStats, /* 0.4.1 */
+ .domainBlockStatsFlags = lxcDomainBlockStatsFlags, /* 1.2.2 */
.domainInterfaceStats = lxcDomainInterfaceStats, /* 0.7.3 */
.domainMemoryStats = lxcDomainMemoryStats, /* 1.2.2 */
.nodeGetCPUStats = lxcNodeGetCPUStats, /* 0.9.3 */
--
1.8.4
3923
days inactive
3932
days old
16 comments
2 participants
participants (2)
-
Gao feng -
Thorsten Behrens