提交 8110c6a5 编写于 作者: N Nitesh Konkar 提交者: John Ferlan

perf: add cpu_migrations software perf event support

This patch adds support and documentation
for the cpu_migrations perf event.
Signed-off-by: NNitesh Konkar <nitkon12@linux.vnet.ibm.com>
上级 99cc3dc6
......@@ -1951,6 +1951,7 @@
&lt;event name='task_clock' enabled='no'/&gt;
&lt;event name='page_faults' enabled='no'/&gt;
&lt;event name='context_switches' enabled='no'/&gt;
&lt;event name='cpu_migrations' enabled='no'/&gt;
&lt;/perf&gt;
...
</pre>
......@@ -2056,6 +2057,13 @@
the platform</td>
<td><code>perf.context_switches</code></td>
</tr>
<tr>
<td><code>cpu_migrations</code></td>
<td>the count of cpu migrations, that is, where the process
moved from one logical processor to another, by
applications running on the platform</td>
<td><code>perf.cpu_migrations</code></td>
</tr>
</table>
<h3><a name="elementsDevices">Devices</a></h3>
......
......@@ -437,6 +437,7 @@
<value>task_clock</value>
<value>page_faults</value>
<value>context_switches</value>
<value>cpu_migrations</value>
</choice>
</attribute>
<attribute name="enabled">
......
......@@ -2230,6 +2230,15 @@ void virDomainStatsRecordListFree(virDomainStatsRecordPtr *stats);
*/
# define VIR_PERF_PARAM_CONTEXT_SWITCHES "context_switches"
/**
* VIR_PERF_PARAM_CPU_MIGRATIONS:
*
* Macro for typed parameter name that represents cpu_migrations
* perf event which can be used to measure the count of cpu
* migrations by applications running on the platform. It corresponds
* to the "perf.cpu_migrations" field in the *Stats APIs.
*/
# define VIR_PERF_PARAM_CPU_MIGRATIONS "cpu_migrations"
int virDomainGetPerfEvents(virDomainPtr dom,
virTypedParameterPtr *params,
......
......@@ -11259,6 +11259,10 @@ virConnectGetDomainCapabilities(virConnectPtr conn,
* "perf.context_switches" - The count of context switches as unsigned long
* long. It is produced by the context_switches
* perf event.
* "perf.cpu_migrations" - The count of cpu migrations, from one logical
* processor to another, as unsigned long
* long. It is produced by the cpu_migrations
* perf event.
*
* Note that entire stats groups or individual stat fields may be missing from
* the output in case they are not supported by the given hypervisor, are not
......
......@@ -9571,6 +9571,7 @@ qemuDomainSetPerfEvents(virDomainPtr dom,
VIR_PERF_PARAM_TASK_CLOCK, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_PAGE_FAULTS, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_CONTEXT_SWITCHES, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_CPU_MIGRATIONS, VIR_TYPED_PARAM_BOOLEAN,
NULL) < 0)
return -1;
......
......@@ -45,7 +45,7 @@ VIR_ENUM_IMPL(virPerfEvent, VIR_PERF_EVENT_LAST,
"bus_cycles", "stalled_cycles_frontend",
"stalled_cycles_backend", "ref_cpu_cycles",
"cpu_clock", "task_clock", "page_faults",
"context_switches");
"context_switches", "cpu_migrations");
struct virPerfEvent {
int type;
......@@ -126,6 +126,9 @@ static struct virPerfEventAttr attrs[] = {
{.type = VIR_PERF_EVENT_CONTEXT_SWITCHES,
.attrType = PERF_TYPE_SOFTWARE,
.attrConfig = PERF_COUNT_SW_CONTEXT_SWITCHES},
{.type = VIR_PERF_EVENT_CPU_MIGRATIONS,
.attrType = PERF_TYPE_SOFTWARE,
.attrConfig = PERF_COUNT_SW_CPU_MIGRATIONS},
};
typedef struct virPerfEventAttr *virPerfEventAttrPtr;
......
......@@ -51,6 +51,7 @@ typedef enum {
VIR_PERF_EVENT_TASK_CLOCK, /* Count of task clock time*/
VIR_PERF_EVENT_PAGE_FAULTS, /* Count of total page faults */
VIR_PERF_EVENT_CONTEXT_SWITCHES, /* Count of context switches */
VIR_PERF_EVENT_CPU_MIGRATIONS, /* Count of cpu migrations */
VIR_PERF_EVENT_LAST
} virPerfEventType;
......
......@@ -30,6 +30,7 @@
<event name='task_clock' enabled='yes'/>
<event name='page_faults' enabled='yes'/>
<event name='context_switches' enabled='yes'/>
<event name='cpu_migrations' enabled='yes'/>
</perf>
<devices>
</devices>
......
......@@ -968,6 +968,7 @@ I<--perf> returns the statistics of all enabled perf events:
"perf.task_clock" - the count of task clock time
"perf.page_faults" - the count of page faults
"perf.context_switches" - the count of context switches
"perf.cpu_migrations" - the count of cpu migrations
See the B<perf> command for more details about each event.
......@@ -2345,6 +2346,8 @@ B<Valid perf event names>
applications running on the platform.
context_switches - Provides the count of context switches
by applications running on the platform.
cpu_migrations - Provides the count cpu migrations by
applications running on the platform.
B<Note>: The statistics can be retrieved using the B<domstats> command using
the I<--perf> flag.
......
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