9:38 p.m.
virNodeGetCPUTimeParameters: Implement virsh support
Add nodecputime subcommand to virsh.
This subcommand prints below outputs.
[Linux]
# virsh nodecputime
usage : 0.5%
user : 0.0%
system: 0.5%
idle : 99.5%
iowait: 0.0%
[can get cpu utilization directly(ESX?)]
# virsh nodecputime
usage : 0.5%
idle : 99.5%
The reason is here.
http://www.mail-archive.com/libvir-list@redhat.com/msg36821.html
Signed-off-by: Minoru Usui <usui(a)mxm.nes.nec.co.jp>
---
tools/virsh.c | 107 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
tools/virsh.pod | 4 ++
2 files changed, 111 insertions(+), 0 deletions(-)
diff --git a/tools/virsh.c b/tools/virsh.c
index 3baa015..fd5aa2a 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -3454,6 +3454,112 @@ cmdNodeinfo(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
}
/*
+ * "nodecputime" command
+ */
+static const vshCmdInfo info_nodecputime[] = {
+ {"help", N_("Prints cpu utilization of the node.")},
+ {"desc", N_("Returns cpu utilization of the node.(%)")},
+ {NULL, NULL}
+};
+
+static bool
+cmdNodeCPUTimeParameters(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
+{
+ int i, j;
+ bool flag_utilization = false;
+ virCPUTimeParameterPtr params;
+ int nparams = 0;
+ bool ret = false;
+ struct cpu_time {
+ unsigned long long user;
+ unsigned long long sys;
+ unsigned long long idle;
+ unsigned long long iowait;
+ unsigned long long util;
+ } cpu_time[2];
+ double user_time, sys_time, idle_time, iowait_time, total_time;
+ double usage;
+
+ if (!vshConnectionUsability(ctl, ctl->conn))
+ return false;
+
+ if (virNodeGetCPUTimeParameters(ctl->conn, NULL, &nparams, 0) != 0) {
+ vshError(ctl, "%s",
+ _("Unable to get number of cpu time parameters"));
+ return false;
+ }
+ if (nparams == 0) {
+ /* nothing to output */
+ return true;
+ }
+
+ memset(cpu_time, 0, sizeof(struct cpu_time) * 2);
+ params = vshCalloc(ctl, nparams, sizeof(*params));
+ for (i = 0; i < 2; i++) {
+ if (virNodeGetCPUTimeParameters(ctl->conn, params, &nparams, 0) != 0) {
+ vshError(ctl, "%s", _("Unable to get node cpu time
parameters"));
+ goto cleanup;
+ }
+
+ for (j = 0; j < nparams; j++) {
+ unsigned long long value = params[j].value;
+
+ if (strcmp(params[j].field, VIR_CPU_TIME_KERNEL) == 0)
+ cpu_time[i].sys = value;
+
+ if (strcmp(params[j].field, VIR_CPU_TIME_USER) == 0)
+ cpu_time[i].user = value;
+
+ if (strcmp(params[j].field, VIR_CPU_TIME_IDLE) == 0)
+ cpu_time[i].idle = value;
+
+ if (strcmp(params[j].field, VIR_CPU_TIME_IOWAIT) == 0)
+ cpu_time[i].iowait = value;
+
+ if (strcmp(params[j].field, VIR_CPU_TIME_UTILIZATION) == 0) {
+ cpu_time[i].util = value;
+ flag_utilization = true;
+ break;
+ }
+ }
+
+ sleep(1);
+ }
+
+ if (flag_utilization == true) {
+ usage = cpu_time[0].util;
+
+ vshPrint(ctl, "%-15s %5.1lf%%\n", _("usage:"), usage);
+ vshPrint(ctl, "%-15s %5.1lf%%\n", _("idle :"), 100 - usage);
+ } else {
+ user_time = cpu_time[1].user - cpu_time[0].user;
+ sys_time = cpu_time[1].sys - cpu_time[0].sys;
+ idle_time = cpu_time[1].idle - cpu_time[0].idle;
+ iowait_time = cpu_time[1].iowait - cpu_time[0].iowait;
+ total_time = user_time + sys_time + idle_time + iowait_time;
+
+ usage = (user_time + sys_time) / total_time * 100;
+
+ vshPrint(ctl, "%-15s %5.1lf%%\n",
+ _("usage:"), usage);
+ vshPrint(ctl, "%-15s %5.1lf%%\n",
+ _(" user :"), user_time / total_time * 100);
+ vshPrint(ctl, "%-15s %5.1lf%%\n",
+ _(" system:"), sys_time / total_time * 100);
+ vshPrint(ctl, "%-15s %5.1lf%%\n",
+ _("idle :"), idle_time / total_time * 100);
+ vshPrint(ctl, "%-15s %5.1lf%%\n",
+ _("iowait:"), iowait_time / total_time * 100);
+ }
+
+ ret = true;
+
+ cleanup:
+ VIR_FREE(params);
+ return ret;
+}
+
+/*
* "capabilities" command
*/
static const vshCmdInfo info_capabilities[] = {
@@ -10909,6 +11015,7 @@ static const vshCmdDef hostAndHypervisorCmds[] = {
{"freecell", cmdFreecell, opts_freecell, info_freecell},
{"hostname", cmdHostname, NULL, info_hostname},
{"nodeinfo", cmdNodeinfo, NULL, info_nodeinfo},
+ {"nodecputime", cmdNodeCPUTimeParameters, NULL, info_nodecputime},
{"qemu-monitor-command", cmdQemuMonitorCommand, opts_qemu_monitor_command,
info_qemu_monitor_command},
{"sysinfo", cmdSysinfo, NULL, info_sysinfo},
{"uri", cmdURI, NULL, info_uri},
diff --git a/tools/virsh.pod b/tools/virsh.pod
index f317c57..e669edb 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -237,6 +237,10 @@ Print the XML representation of the hypervisor sysinfo, if
available.
Returns basic information about the node, like number and type of CPU,
and size of the physical memory.
+=item B<nodecputime>
+
+Returns cpu utilization of the node.
+
=item B<capabilities>
Print an XML document describing the capabilities of the hypervisor
--
1.7.1
--
Minoru Usui <usui(a)mxm.nes.nec.co.jp>