4:06 a.m.
Add new virsh command line `nodecachestats` to expose the cache usage
on a node.
Signed-off-by: Eli Qiao <liyong.qiao(a)intel.com>
---
src/libvirt_private.syms | 3 ++-
src/qemu/qemu_driver.c | 12 ++++++++++
src/util/virresctrl.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++
src/util/virresctrl.h | 8 +++++++
tools/virsh-host.c | 49 ++++++++++++++++++++++++++++++++++++++
5 files changed, 133 insertions(+), 1 deletion(-)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 9cfffb8..75a4c98 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -2323,13 +2323,14 @@ virRandomInt;
# util/virresctrl.h
virResCtrlAvailable;
+virResCtrlCacheGetStats;
virResCtrlGet;
virResCtrlInit;
virResCtrlSetCacheBanks;
virResCtrlTypeFromString;
virResCtrlTypeToString;
virResCtrlUpdate;
-#
+
# util/virrotatingfile.h
virRotatingFileReaderConsume;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 0f11ae2..4677406 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -18285,6 +18285,17 @@ qemuNodeGetCPUStats(virConnectPtr conn,
return virHostCPUGetStats(cpuNum, params, nparams, flags);
}
+static int
+qemuNodeGetCacheStats(virConnectPtr conn,
+ virNodeCacheStatsPtr params,
+ int *nparams,
+ unsigned int flags)
+{
+ if (virNodeGetCacheStatsEnsureACL(conn) < 0)
+ return -1;
+
+ return virResCtrlCacheGetStats(params, nparams, flags);
+}
static int
qemuNodeGetMemoryStats(virConnectPtr conn,
@@ -20391,6 +20402,7 @@ static virHypervisorDriver qemuHypervisorDriver = {
.domainMemoryPeek = qemuDomainMemoryPeek, /* 0.4.4 */
.domainGetBlockInfo = qemuDomainGetBlockInfo, /* 0.8.1 */
.nodeGetCPUStats = qemuNodeGetCPUStats, /* 0.9.3 */
+ .nodeGetCacheStats = qemuNodeGetCacheStats, /* 3.1.0 */
.nodeGetMemoryStats = qemuNodeGetMemoryStats, /* 0.9.3 */
.nodeGetCellsFreeMemory = qemuNodeGetCellsFreeMemory, /* 0.4.4 */
.nodeGetFreeMemory = qemuNodeGetFreeMemory, /* 0.4.4 */
diff --git a/src/util/virresctrl.c b/src/util/virresctrl.c
index 16c01a2..97f7e84 100644
--- a/src/util/virresctrl.c
+++ b/src/util/virresctrl.c
@@ -1034,3 +1034,65 @@ virResCtrlGet(int type)
{
return &resctrlall[type];
}
+
+int virResCtrlCacheGetStats(virNodeCacheStatsPtr params,
+ int *nparams,
+ unsigned int flags)
+{
+ virCheckFlags(0, -1);
+ size_t i, j, k;
+ char *value;
+ int rc = -1;
+ int lockfd;
+
+ if (*nparams == 0) {
+ for (i = 0; i < VIR_RDT_RESOURCE_LAST; i++) {
+ if (VIR_RESCTRL_ENABLED(i))
+ *nparams += resctrlall[i].num_banks;
+ }
+ }
+ if (params == NULL)
+ return 0;
+
+ if ((lockfd = open(RESCTRL_DIR, O_RDONLY)) < 0)
+ goto cleanup;
+
+ if (VIR_RESCTRL_LOCK(lockfd, LOCK_SH) < 0) {
+ virReportSystemError(errno, _("Unable to lock '%s'"),
RESCTRL_DIR);
+ goto cleanup;
+ }
+ if (virResCtrlScan() < 0) {
+ VIR_ERROR(_("Failed to scan resctrl domain dir"));
+ goto cleanup;
+ }
+
+ virResCtrlRefreshSchemata();
+
+ if ((rc = virResCtrlFlushDomainToSysfs(domainall.domains)) < 0)
+ goto cleanup;
+
+ k = 0;
+
+ for (i = 0; i < VIR_RDT_RESOURCE_LAST; i++) {
+ if (VIR_RESCTRL_ENABLED(i)) {
+ for (j = 0; j < resctrlall[i].num_banks; j++) {
+
+ if (virAsprintf(&value, "%s.%zu",
+ resctrlall[i].name, j) < 0)
+ goto cleanup;
+
+ if (virStrcpyStatic((¶ms[k])->field, value) == NULL)
+ goto cleanup;
+
+ (¶ms[k++])->value = resctrlall[i].cache_banks[j].cache_left;
+ }
+ }
+ }
+
+ rc = 0;
+
+ cleanup:
+ VIR_FREE(value);
+ VIR_RESCTRL_UNLOCK(lockfd);
+ return rc;
+}
diff --git a/src/util/virresctrl.h b/src/util/virresctrl.h
index 968e0dc..eef5370 100644
--- a/src/util/virresctrl.h
+++ b/src/util/virresctrl.h
@@ -80,9 +80,17 @@ struct _virResCtrl {
};
bool virResCtrlAvailable(void);
+
int virResCtrlInit(void);
+
virResCtrlPtr virResCtrlGet(int);
+
int virResCtrlSetCacheBanks(virDomainCachetunePtr,
unsigned char *, pid_t *, int);
+
int virResCtrlUpdate(unsigned char *);
+
+int virResCtrlCacheGetStats(virNodeCacheStatsPtr params,
+ int *nparams,
+ unsigned int flags);
#endif
diff --git a/tools/virsh-host.c b/tools/virsh-host.c
index 24ebde2..c90bd2e 100644
--- a/tools/virsh-host.c
+++ b/tools/virsh-host.c
@@ -946,6 +946,49 @@ cmdNodeMemStats(vshControl *ctl, const vshCmd *cmd)
VIR_FREE(params);
return ret;
}
+/* "nodecachestats" command
+ */
+static const vshCmdInfo info_nodecachestats[] = {
+ {.name = "help",
+ .data = N_("Prints cache stats of the node.")
+ },
+ {.name = "desc",
+ .data = N_("Returns cache stats of the node, in kilobytes.")
+ },
+ {.name = NULL}
+};
+
+static bool
+cmdNodeCacheStats(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
+{
+ virshControlPtr priv = ctl->privData;
+ virNodeCacheStatsPtr params;
+ int nparams = 0;
+ size_t i;
+ bool ret = false;
+
+ if (virNodeGetCacheStats(priv->conn, NULL, &nparams, 0) != 0) {
+ vshError(ctl, "%s",
+ _("Unable to get number of cache stats"));
+ return false;
+ }
+ if (nparams == 0) {
+ /* nothing to output */
+ return true;
+ }
+
+ params = vshCalloc(ctl, nparams, sizeof(*params));
+ if (virNodeGetCacheStats(priv->conn, params, &nparams, 0) != 0) {
+ vshError(ctl, "%s", _("Unable to get node cache stats"));
+ goto cleanup;
+ }
+
+ for (i = 0; i < nparams; i++)
+ vshPrint(ctl, "%s: %llu KiB\n", params[i].field, params[i].value);
+
+ cleanup:
+ return ret;
+}
/*
* "nodesuspend" command
@@ -1455,6 +1498,12 @@ const vshCmdDef hostAndHypervisorCmds[] = {
.info = info_nodememstats,
.flags = 0
},
+ {.name = "nodecachestats",
+ .handler = cmdNodeCacheStats,
+ .opts = NULL,
+ .info = info_nodecachestats,
+ .flags = 0
+ },
{.name = "nodesuspend",
.handler = cmdNodeSuspend,
.opts = opts_node_suspend,
--
1.9.1