[libvirt] [PATCH 05/12] [v7] virNodeGetCPUStats: Implement virsh support
Daniel P. Berrange
berrange at redhat.com
Tue Jun 14 09:06:46 UTC 2011
On Tue, Jun 07, 2011 at 10:02:13AM +0900, Minoru Usui wrote:
> virNodeGetCPUStats: Implement virsh support
>
> Signed-off-by: Minoru Usui <usui at mxm.nes.nec.co.jp>
> ---
> tools/virsh.c | 134 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
> tools/virsh.pod | 7 +++
> 2 files changed, 141 insertions(+), 0 deletions(-)
>
> diff --git a/tools/virsh.c b/tools/virsh.c
> index 5679a2d..2fbc91a 100644
> --- a/tools/virsh.c
> +++ b/tools/virsh.c
> @@ -3682,6 +3682,139 @@ 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[] = {
> + {"cpu", VSH_OT_INT, 0, N_("prints specified cpu statistics only.")},
> + {"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");
> + int cpuNum = VIR_CPU_STATS_ALL_CPUS;
> + 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 (vshCommandOptInt(cmd, "cpu", &cpuNum) < 0) {
> + vshError(ctl, "%s", _("Invalid value of cpuNum"));
> + return false;
> + }
> +
> + if (virNodeGetCPUStats(ctl->conn, cpuNum, 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, cpuNum, 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[] = {
> @@ -11293,6 +11426,7 @@ 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 6ca3002..ade4eab 100644
> --- a/tools/virsh.pod
> +++ b/tools/virsh.pod
> @@ -237,6 +237,13 @@ 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> optional I<--cpu> I<--percent>
> +
> +Returns cpu stats of the node.
> +If I<--cpu> is specified, this will prints specified cpu statistics only.
> +If I<--percent> is specified, this will prints percentage of each kind of cpu
> +statistics during 1 second.
> +
> =item B<capabilities>
>
> Print an XML document describing the capabilities of the hypervisor
ACK
Daniel
--
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