mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2025-01-12 07:42:56 +00:00
perf: add cpu_clock software perf event support
This patch adds support and documentation for the cpu_clock perf event. Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
This commit is contained in:
parent
62bc956786
commit
f372a862ac
docs
include/libvirt
src
tests/genericxml2xmlindata
tools
@ -1947,6 +1947,7 @@
|
||||
<event name='stalled_cycles_frontend' enabled='no'/>
|
||||
<event name='stalled_cycles_backend' enabled='no'/>
|
||||
<event name='ref_cpu_cycles' enabled='no'/>
|
||||
<event name='cpu_clock' enabled='no'/>
|
||||
</perf>
|
||||
...
|
||||
</pre>
|
||||
@ -2025,6 +2026,13 @@
|
||||
by applications running on the platform</td>
|
||||
<td><code>perf.ref_cpu_cycles</code></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><code>cpu_clock</code></td>
|
||||
<td>the count of cpu clock time, as measured by a monotonic
|
||||
high-resolution per-CPU timer, by applications running on
|
||||
the platform</td>
|
||||
<td><code>perf.cpu_clock</code></td>
|
||||
</tr>
|
||||
</table>
|
||||
|
||||
<h3><a name="elementsDevices">Devices</a></h3>
|
||||
|
@ -433,6 +433,7 @@
|
||||
<value>stalled_cycles_frontend</value>
|
||||
<value>stalled_cycles_backend</value>
|
||||
<value>ref_cpu_cycles</value>
|
||||
<value>cpu_clock</value>
|
||||
</choice>
|
||||
</attribute>
|
||||
<attribute name="enabled">
|
||||
|
@ -2188,6 +2188,17 @@ void virDomainStatsRecordListFree(virDomainStatsRecordPtr *stats);
|
||||
*/
|
||||
# define VIR_PERF_PARAM_REF_CPU_CYCLES "ref_cpu_cycles"
|
||||
|
||||
/**
|
||||
* VIR_PERF_PARAM_CPU_CLOCK:
|
||||
*
|
||||
* Macro for typed parameter name that represents cpu_clock
|
||||
* perf event which can be used to measure the count of cpu
|
||||
* clock time by applications running on the platform. It
|
||||
* corresponds to the "perf.cpu_clock" field in the *Stats
|
||||
* APIs.
|
||||
*/
|
||||
# define VIR_PERF_PARAM_CPU_CLOCK "cpu_clock"
|
||||
|
||||
int virDomainGetPerfEvents(virDomainPtr dom,
|
||||
virTypedParameterPtr *params,
|
||||
int *nparams,
|
||||
|
@ -11250,6 +11250,8 @@ virConnectGetDomainCapabilities(virConnectPtr conn,
|
||||
* CPU frequency scaling by applications running
|
||||
* as unsigned long long. It is produced by the
|
||||
* ref_cpu_cycles perf event.
|
||||
* "perf.cpu_clock" - The count of cpu clock time as unsigned long long.
|
||||
* It is produced by the cpu_clock 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
|
||||
|
@ -9567,6 +9567,7 @@ qemuDomainSetPerfEvents(virDomainPtr dom,
|
||||
VIR_PERF_PARAM_STALLED_CYCLES_FRONTEND, VIR_TYPED_PARAM_BOOLEAN,
|
||||
VIR_PERF_PARAM_STALLED_CYCLES_BACKEND, VIR_TYPED_PARAM_BOOLEAN,
|
||||
VIR_PERF_PARAM_REF_CPU_CYCLES, VIR_TYPED_PARAM_BOOLEAN,
|
||||
VIR_PERF_PARAM_CPU_CLOCK, VIR_TYPED_PARAM_BOOLEAN,
|
||||
NULL) < 0)
|
||||
return -1;
|
||||
|
||||
|
@ -43,7 +43,8 @@ VIR_ENUM_IMPL(virPerfEvent, VIR_PERF_EVENT_LAST,
|
||||
"cache_references", "cache_misses",
|
||||
"branch_instructions", "branch_misses",
|
||||
"bus_cycles", "stalled_cycles_frontend",
|
||||
"stalled_cycles_backend", "ref_cpu_cycles");
|
||||
"stalled_cycles_backend", "ref_cpu_cycles",
|
||||
"cpu_clock");
|
||||
|
||||
struct virPerfEvent {
|
||||
int type;
|
||||
@ -112,6 +113,9 @@ static struct virPerfEventAttr attrs[] = {
|
||||
.attrConfig = 0,
|
||||
# endif
|
||||
},
|
||||
{.type = VIR_PERF_EVENT_CPU_CLOCK,
|
||||
.attrType = PERF_TYPE_SOFTWARE,
|
||||
.attrConfig = PERF_COUNT_SW_CPU_CLOCK},
|
||||
};
|
||||
typedef struct virPerfEventAttr *virPerfEventAttrPtr;
|
||||
|
||||
|
@ -47,6 +47,7 @@ typedef enum {
|
||||
the backend of the instruction
|
||||
processor pipeline */
|
||||
VIR_PERF_EVENT_REF_CPU_CYCLES, /* Count of ref cpu cycles */
|
||||
VIR_PERF_EVENT_CPU_CLOCK, /* Count of cpu clock time*/
|
||||
|
||||
VIR_PERF_EVENT_LAST
|
||||
} virPerfEventType;
|
||||
|
@ -26,6 +26,7 @@
|
||||
<event name='stalled_cycles_frontend' enabled='yes'/>
|
||||
<event name='stalled_cycles_backend' enabled='yes'/>
|
||||
<event name='ref_cpu_cycles' enabled='yes'/>
|
||||
<event name='cpu_clock' enabled='yes'/>
|
||||
</perf>
|
||||
<devices>
|
||||
</devices>
|
||||
|
@ -964,6 +964,7 @@ I<--perf> returns the statistics of all enabled perf events:
|
||||
"perf.stalled_cycles_backend" - the count of stalled backend
|
||||
cpu cycles
|
||||
"perf.ref_cpu_cycles" - the count of ref cpu cycles
|
||||
"perf.cpu_clock" - the count of cpu clock time
|
||||
|
||||
See the B<perf> command for more details about each event.
|
||||
|
||||
@ -2333,6 +2334,8 @@ B<Valid perf event names>
|
||||
ref_cpu_cycles - Provides the count of total cpu cycles
|
||||
not affected by CPU frequency scaling by
|
||||
applications running on the platform.
|
||||
cpu_clock - Provides the cpu clock time consumed by
|
||||
applications running on the platform.
|
||||
|
||||
B<Note>: The statistics can be retrieved using the B<domstats> command using
|
||||
the I<--perf> flag.
|
||||
|
Loading…
x
Reference in New Issue
Block a user