[libvirt] [PATCHv6 5/6] virNodeGetCPUStats: Implement virsh support
Minoru Usui
usui at mxm.nes.nec.co.jp
Wed May 25 06:11:41 UTC 2011
virNodeGetCPUStats: Implement virsh support
Add nodecpustats subcommand to virsh.
This subcommand prints below output.
[Linux]
# virsh nodecpustats
user : 3820240000000
system: 3029560000000
idle : 186380870000000
iowait: 518300000000
# virsh nodecpustats --percent
usage : 0.5%
user : 0.0%
system: 0.5%
idle : 99.5%
iowait: 0.0%
[can get cpu utilization directly(ESX?)]
# virsh nodecpustats
# virsh nodecpustats --percent
usage : 0.5%
idle : 99.5%
Signed-off-by: Minoru Usui <usui at mxm.nes.nec.co.jp>
---
tools/virsh.c | 127 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
tools/virsh.pod | 6 +++
2 files changed, 133 insertions(+), 0 deletions(-)
diff --git a/tools/virsh.c b/tools/virsh.c
index de49489..6d6a5dd 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -3490,6 +3490,132 @@ cmdNodeinfo(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
}
/*
+ * "nodecpustats" command
+ */
+static const vshCmdInfo info_nodecpustats[] = {
+ {"help", N_("Prints cpu stats of the node.")},
+ {"desc", N_("Returns cpu stats of the node.(nsec)")},
+ {NULL, NULL}
+};
+
+static const vshCmdOptDef opts_node_cpustats[] = {
+ {"percent", VSH_OT_BOOL, 0, N_("prints by percentage during 1 second.")},
+ {NULL, 0, 0, NULL}
+};
+
+static bool
+cmdNodeCPUStats(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
+{
+ int i, j;
+ bool flag_utilization = false;
+ bool flag_percent = vshCommandOptBool(cmd, "percent");
+ virCPUStatsPtr params;
+ int nparams = 0;
+ bool ret = false;
+ struct cpu_stats {
+ unsigned long long user;
+ unsigned long long sys;
+ unsigned long long idle;
+ unsigned long long iowait;
+ unsigned long long util;
+ } cpu_stats[2];
+ double user_time, sys_time, idle_time, iowait_time, total_time;
+ double usage;
+
+ if (!vshConnectionUsability(ctl, ctl->conn))
+ return false;
+
+ if (virNodeGetCPUStats(ctl->conn, NULL, &nparams, 0) != 0) {
+ vshError(ctl, "%s",
+ _("Unable to get number of cpu stats"));
+ return false;
+ }
+ if (nparams == 0) {
+ /* nothing to output */
+ return true;
+ }
+
+ memset(cpu_stats, 0, sizeof(struct cpu_stats) * 2);
+ params = vshCalloc(ctl, nparams, sizeof(*params));
+
+ i = 0;
+ do {
+ if (virNodeGetCPUStats(ctl->conn, params, &nparams, 0) != 0) {
+ vshError(ctl, "%s", _("Unable to get node cpu stats"));
+ goto cleanup;
+ }
+
+ for (j = 0; j < nparams; j++) {
+ unsigned long long value = params[j].value;
+
+ if (strcmp(params[j].field, VIR_CPU_STATS_KERNEL) == 0)
+ cpu_stats[i].sys = value;
+
+ if (strcmp(params[j].field, VIR_CPU_STATS_USER) == 0)
+ cpu_stats[i].user = value;
+
+ if (strcmp(params[j].field, VIR_CPU_STATS_IDLE) == 0)
+ cpu_stats[i].idle = value;
+
+ if (strcmp(params[j].field, VIR_CPU_STATS_IOWAIT) == 0)
+ cpu_stats[i].iowait = value;
+
+ if (strcmp(params[j].field, VIR_CPU_STATS_UTILIZATION) == 0) {
+ cpu_stats[i].util = value;
+ flag_utilization = true;
+ }
+ }
+
+ if (flag_utilization || (flag_percent == false))
+ break;
+
+ i++;
+ sleep(1);
+ } while(i < 2);
+
+ if (flag_percent == false) {
+ if (flag_utilization == false) {
+ vshPrint(ctl, "%-15s %20llu\n", _("user :"), cpu_stats[0].user);
+ vshPrint(ctl, "%-15s %20llu\n", _("system:"), cpu_stats[0].sys);
+ vshPrint(ctl, "%-15s %20llu\n", _("idle :"), cpu_stats[0].idle);
+ vshPrint(ctl, "%-15s %20llu\n", _("iowait:"), cpu_stats[0].iowait);
+ }
+ } else {
+ if (flag_utilization) {
+ usage = cpu_stats[0].util;
+
+ vshPrint(ctl, "%-15s %5.1lf%%\n", _("usage:"), usage);
+ vshPrint(ctl, "%-15s %5.1lf%%\n", _("idle :"), 100 - usage);
+ } else {
+ user_time = cpu_stats[1].user - cpu_stats[0].user;
+ sys_time = cpu_stats[1].sys - cpu_stats[0].sys;
+ idle_time = cpu_stats[1].idle - cpu_stats[0].idle;
+ iowait_time = cpu_stats[1].iowait - cpu_stats[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[] = {
@@ -10998,6 +11124,7 @@ static const vshCmdDef hostAndHypervisorCmds[] = {
{"freecell", cmdFreecell, opts_freecell, info_freecell, 0},
{"hostname", cmdHostname, NULL, info_hostname, 0},
{"nodeinfo", cmdNodeinfo, NULL, info_nodeinfo, 0},
+ {"nodecpustats", cmdNodeCPUStats, opts_node_cpustats, info_nodecpustats},
{"qemu-monitor-command", cmdQemuMonitorCommand, opts_qemu_monitor_command,
info_qemu_monitor_command, 0},
{"sysinfo", cmdSysinfo, NULL, info_sysinfo, 0},
diff --git a/tools/virsh.pod b/tools/virsh.pod
index ef01f41..76f6616 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -237,6 +237,12 @@ 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<nodecpustats>
+
+Returns cpu stats of the node, if I<--percent>
+is specified this will prints percentage of each kind of cpu time
+during 1 second.
+
=item B<capabilities>
Print an XML document describing the capabilities of the hypervisor
--
1.7.1
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