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perf: add task_clock software perf event support
This patch adds support and documentation for the task_clock perf event. Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
This commit is contained in:
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f372a862ac
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20dc690865
@ -1948,6 +1948,7 @@
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<event name='stalled_cycles_backend' enabled='no'/>
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<event name='stalled_cycles_backend' enabled='no'/>
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<event name='ref_cpu_cycles' enabled='no'/>
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<event name='ref_cpu_cycles' enabled='no'/>
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<event name='cpu_clock' enabled='no'/>
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<event name='cpu_clock' enabled='no'/>
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<event name='task_clock' enabled='no'/>
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</perf>
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</perf>
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...
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...
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</pre>
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</pre>
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@ -2033,6 +2034,13 @@
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the platform</td>
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the platform</td>
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<td><code>perf.cpu_clock</code></td>
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<td><code>perf.cpu_clock</code></td>
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</tr>
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</tr>
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<tr>
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<td><code>task_clock</code></td>
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<td>the count of task clock time, as measured by a monotonic
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high-resolution CPU timer, specific to the task that
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is run by applications running on the platform</td>
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<td><code>perf.task_clock</code></td>
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</tr>
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</table>
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</table>
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<h3><a name="elementsDevices">Devices</a></h3>
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<h3><a name="elementsDevices">Devices</a></h3>
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@ -434,6 +434,7 @@
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<value>stalled_cycles_backend</value>
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<value>stalled_cycles_backend</value>
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<value>ref_cpu_cycles</value>
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<value>ref_cpu_cycles</value>
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<value>cpu_clock</value>
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<value>cpu_clock</value>
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<value>task_clock</value>
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</choice>
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</choice>
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</attribute>
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</attribute>
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<attribute name="enabled">
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<attribute name="enabled">
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@ -2199,6 +2199,17 @@ void virDomainStatsRecordListFree(virDomainStatsRecordPtr *stats);
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*/
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*/
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# define VIR_PERF_PARAM_CPU_CLOCK "cpu_clock"
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# define VIR_PERF_PARAM_CPU_CLOCK "cpu_clock"
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/**
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* VIR_PERF_PARAM_TASK_CLOCK:
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*
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* Macro for typed parameter name that represents task_clock
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* perf event which can be used to measure the count of task
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* clock time by applications running on the platform. It
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* corresponds to the "perf.task_clock" field in the *Stats
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* APIs.
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*/
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# define VIR_PERF_PARAM_TASK_CLOCK "task_clock"
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int virDomainGetPerfEvents(virDomainPtr dom,
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int virDomainGetPerfEvents(virDomainPtr dom,
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virTypedParameterPtr *params,
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virTypedParameterPtr *params,
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int *nparams,
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int *nparams,
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@ -11252,6 +11252,8 @@ virConnectGetDomainCapabilities(virConnectPtr conn,
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* ref_cpu_cycles perf event.
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* ref_cpu_cycles perf event.
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* "perf.cpu_clock" - The count of cpu clock time as unsigned long long.
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* "perf.cpu_clock" - The count of cpu clock time as unsigned long long.
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* It is produced by the cpu_clock perf event.
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* It is produced by the cpu_clock perf event.
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* "perf.task_clock" - The count of task clock time as unsigned long long.
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* It is produced by the task_clock perf event.
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*
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*
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* Note that entire stats groups or individual stat fields may be missing from
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* Note that entire stats groups or individual stat fields may be missing from
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* the output in case they are not supported by the given hypervisor, are not
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* the output in case they are not supported by the given hypervisor, are not
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@ -9568,6 +9568,7 @@ qemuDomainSetPerfEvents(virDomainPtr dom,
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VIR_PERF_PARAM_STALLED_CYCLES_BACKEND, VIR_TYPED_PARAM_BOOLEAN,
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VIR_PERF_PARAM_STALLED_CYCLES_BACKEND, VIR_TYPED_PARAM_BOOLEAN,
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VIR_PERF_PARAM_REF_CPU_CYCLES, VIR_TYPED_PARAM_BOOLEAN,
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VIR_PERF_PARAM_REF_CPU_CYCLES, VIR_TYPED_PARAM_BOOLEAN,
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VIR_PERF_PARAM_CPU_CLOCK, VIR_TYPED_PARAM_BOOLEAN,
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VIR_PERF_PARAM_CPU_CLOCK, VIR_TYPED_PARAM_BOOLEAN,
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VIR_PERF_PARAM_TASK_CLOCK, VIR_TYPED_PARAM_BOOLEAN,
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NULL) < 0)
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NULL) < 0)
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return -1;
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return -1;
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@ -44,7 +44,7 @@ VIR_ENUM_IMPL(virPerfEvent, VIR_PERF_EVENT_LAST,
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"branch_instructions", "branch_misses",
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"branch_instructions", "branch_misses",
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"bus_cycles", "stalled_cycles_frontend",
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"bus_cycles", "stalled_cycles_frontend",
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"stalled_cycles_backend", "ref_cpu_cycles",
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"stalled_cycles_backend", "ref_cpu_cycles",
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"cpu_clock");
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"cpu_clock", "task_clock");
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struct virPerfEvent {
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struct virPerfEvent {
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int type;
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int type;
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@ -116,6 +116,9 @@ static struct virPerfEventAttr attrs[] = {
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{.type = VIR_PERF_EVENT_CPU_CLOCK,
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{.type = VIR_PERF_EVENT_CPU_CLOCK,
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.attrType = PERF_TYPE_SOFTWARE,
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.attrType = PERF_TYPE_SOFTWARE,
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.attrConfig = PERF_COUNT_SW_CPU_CLOCK},
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.attrConfig = PERF_COUNT_SW_CPU_CLOCK},
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{.type = VIR_PERF_EVENT_TASK_CLOCK,
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.attrType = PERF_TYPE_SOFTWARE,
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.attrConfig = PERF_COUNT_SW_TASK_CLOCK},
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};
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};
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typedef struct virPerfEventAttr *virPerfEventAttrPtr;
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typedef struct virPerfEventAttr *virPerfEventAttrPtr;
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@ -48,6 +48,7 @@ typedef enum {
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processor pipeline */
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processor pipeline */
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VIR_PERF_EVENT_REF_CPU_CYCLES, /* Count of ref cpu cycles */
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VIR_PERF_EVENT_REF_CPU_CYCLES, /* Count of ref cpu cycles */
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VIR_PERF_EVENT_CPU_CLOCK, /* Count of cpu clock time*/
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VIR_PERF_EVENT_CPU_CLOCK, /* Count of cpu clock time*/
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VIR_PERF_EVENT_TASK_CLOCK, /* Count of task clock time*/
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VIR_PERF_EVENT_LAST
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VIR_PERF_EVENT_LAST
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} virPerfEventType;
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} virPerfEventType;
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@ -27,6 +27,7 @@
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<event name='stalled_cycles_backend' enabled='yes'/>
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<event name='stalled_cycles_backend' enabled='yes'/>
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<event name='ref_cpu_cycles' enabled='yes'/>
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<event name='ref_cpu_cycles' enabled='yes'/>
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<event name='cpu_clock' enabled='yes'/>
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<event name='cpu_clock' enabled='yes'/>
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<event name='task_clock' enabled='yes'/>
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</perf>
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</perf>
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<devices>
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<devices>
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</devices>
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</devices>
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@ -965,6 +965,7 @@ I<--perf> returns the statistics of all enabled perf events:
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cpu cycles
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cpu cycles
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"perf.ref_cpu_cycles" - the count of ref cpu cycles
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"perf.ref_cpu_cycles" - the count of ref cpu cycles
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"perf.cpu_clock" - the count of cpu clock time
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"perf.cpu_clock" - the count of cpu clock time
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"perf.task_clock" - the count of task clock time
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See the B<perf> command for more details about each event.
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See the B<perf> command for more details about each event.
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@ -2336,6 +2337,8 @@ B<Valid perf event names>
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applications running on the platform.
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applications running on the platform.
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cpu_clock - Provides the cpu clock time consumed by
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cpu_clock - Provides the cpu clock time consumed by
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applications running on the platform.
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applications running on the platform.
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task_clock - Provides the task clock time consumed by
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applications running on the platform.
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B<Note>: The statistics can be retrieved using the B<domstats> command using
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B<Note>: The statistics can be retrieved using the B<domstats> command using
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the I<--perf> flag.
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the I<--perf> flag.
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