[libvirt] [PATCH 2/2] cpustats: report user and sys times
Eric Blake
eblake at redhat.com
Fri Mar 9 17:37:12 UTC 2012
Thanks to cgroups, providing user vs. system time of the overall
guest is easy to add to our existing API.
* include/libvirt/libvirt.h.in (VIR_DOMAIN_CPU_STATS_USERTIME)
(VIR_DOMAIN_CPU_STATS_SYSTEMTIME): New constants.
* src/util/virtypedparam.h (virTypedParameterArrayValidate)
(virTypedParameterAssign): Enforce checking the result.
* src/qemu/qemu_driver.c (qemuDomainGetPercpuStats): Fix offender.
(qemuDomainGetTotalcpuStats): Implement new parameters.
* tools/virsh.c (cmdCPUStats): Tweak output accordingly.
---
include/libvirt/libvirt.h.in | 12 +++++++++++
src/qemu/qemu_driver.c | 45 ++++++++++++++++++++++++++++++++++-------
src/util/virtypedparam.h | 5 ++-
tools/virsh.c | 12 ++++++----
4 files changed, 59 insertions(+), 15 deletions(-)
diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
index 66883fb..7d41642 100644
--- a/include/libvirt/libvirt.h.in
+++ b/include/libvirt/libvirt.h.in
@@ -1332,6 +1332,18 @@ int virDomainGetState (virDomainPtr domain,
*/
#define VIR_DOMAIN_CPU_STATS_CPUTIME "cpu_time"
+/**
+ * VIR_DOMAIN_CPU_STATS_USERTIME:
+ * cpu time charged to user instructions in nanoseconds, as a ullong
+ */
+#define VIR_DOMAIN_CPU_STATS_USERTIME "user_time"
+
+/**
+ * VIR_DOMAIN_CPU_STATS_SYSTEMTIME:
+ * cpu time charged to system instructions in nanoseconds, as a ullong
+ */
+#define VIR_DOMAIN_CPU_STATS_SYSTEMTIME "system_time"
+
int virDomainGetCPUStats(virDomainPtr domain,
virTypedParameterPtr params,
unsigned int nparams,
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index be678f3..3147a9b 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -101,6 +101,9 @@
#define QEMU_NB_NUMA_PARAM 2
+#define QEMU_NB_TOTAL_CPU_STAT_PARAM 3
+#define QEMU_NB_PER_CPU_STAT_PARAM 1
+
#if HAVE_LINUX_KVM_H
# include <linux/kvm.h>
#endif
@@ -12145,11 +12148,10 @@ qemuDomainGetTotalcpuStats(virCgroupPtr group,
int nparams)
{
unsigned long long cpu_time;
- int param_idx = 0;
int ret;
if (nparams == 0) /* return supported number of params */
- return 1;
+ return QEMU_NB_TOTAL_CPU_STAT_PARAM;
/* entry 0 is cputime */
ret = virCgroupGetCpuacctUsage(group, &cpu_time);
if (ret < 0) {
@@ -12157,9 +12159,35 @@ qemuDomainGetTotalcpuStats(virCgroupPtr group,
return -1;
}
- virTypedParameterAssign(¶ms[param_idx], VIR_DOMAIN_CPU_STATS_CPUTIME,
- VIR_TYPED_PARAM_ULLONG, cpu_time);
- 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 > QEMU_NB_TOTAL_CPU_STAT_PARAM)
+ nparams = QEMU_NB_TOTAL_CPU_STAT_PARAM;
+ }
+
+ return nparams;
}
static int
@@ -12180,7 +12208,7 @@ qemuDomainGetPercpuStats(virDomainPtr domain,
/* return the number of supported params */
if (nparams == 0 && ncpus != 0)
- return 1; /* only cpu_time is supported */
+ return QEMU_NB_PER_CPU_STAT_PARAM; /* only cpu_time is supported */
/* return percpu cputime in index 0 */
param_idx = 0;
@@ -12223,8 +12251,9 @@ qemuDomainGetPercpuStats(virDomainPtr domain,
if (i < start_cpu)
continue;
ent = ¶ms[ (i - start_cpu) * nparams + param_idx];
- virTypedParameterAssign(ent, VIR_DOMAIN_CPU_STATS_CPUTIME,
- VIR_TYPED_PARAM_ULLONG, cpu_time);
+ if (virTypedParameterAssign(ent, VIR_DOMAIN_CPU_STATS_CPUTIME,
+ VIR_TYPED_PARAM_ULLONG, cpu_time) < 0)
+ goto cleanup;
}
rv = param_idx + 1;
cleanup:
diff --git a/src/util/virtypedparam.h b/src/util/virtypedparam.h
index 52cbe78..7c513ed 100644
--- a/src/util/virtypedparam.h
+++ b/src/util/virtypedparam.h
@@ -29,9 +29,10 @@ void virTypedParameterArrayClear(virTypedParameterPtr params, int nparams);
int virTypedParameterArrayValidate(virTypedParameterPtr params, int nparams,
/* const char *name, int type ... */ ...)
- ATTRIBUTE_SENTINEL;
+ ATTRIBUTE_SENTINEL ATTRIBUTE_RETURN_CHECK;
int virTypedParameterAssign(virTypedParameterPtr param, const char *name,
- int type, /* TYPE arg */ ...);
+ int type, /* TYPE arg */ ...)
+ ATTRIBUTE_RETURN_CHECK;
#endif /* __VIR_TYPED_PARAM_H */
diff --git a/tools/virsh.c b/tools/virsh.c
index 9a16ef8..630b77f 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -5630,10 +5630,10 @@ cmdCPUStats(vshControl *ctl, const vshCmd *cmd)
for (j = 0; j < nparams; j++) {
pos = i * nparams + j;
- vshPrint(ctl, "\t%-10s ", params[pos].field);
+ vshPrint(ctl, "\t%-12s ", params[pos].field);
if (STREQ(params[pos].field, VIR_DOMAIN_CPU_STATS_CPUTIME) &&
params[j].type == VIR_TYPED_PARAM_ULLONG) {
- vshPrint(ctl, "%lld.%09lld seconds\n",
+ vshPrint(ctl, "%9lld.%09lld seconds\n",
params[pos].value.ul / 1000000000,
params[pos].value.ul % 1000000000);
} else {
@@ -5671,10 +5671,12 @@ do_show_total:
vshPrint(ctl, _("Total:\n"));
for (i = 0; i < nparams; i++) {
- vshPrint(ctl, "\t%-10s ", params[i].field);
- if (STREQ(params[i].field, VIR_DOMAIN_CPU_STATS_CPUTIME) &&
+ vshPrint(ctl, "\t%-12s ", params[i].field);
+ if ((STREQ(params[i].field, VIR_DOMAIN_CPU_STATS_CPUTIME) ||
+ STREQ(params[i].field, VIR_DOMAIN_CPU_STATS_USERTIME) ||
+ STREQ(params[i].field, VIR_DOMAIN_CPU_STATS_SYSTEMTIME)) &&
params[i].type == VIR_TYPED_PARAM_ULLONG) {
- vshPrint(ctl, "%llu.%09llu seconds\n",
+ vshPrint(ctl, "%9lld.%09lld seconds\n",
params[i].value.ul / 1000000000,
params[i].value.ul % 1000000000);
} else {
--
1.7.7.6
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