External/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2024-12-22 05:35:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

perf: add ref_cpu_cycles perf event support

Browse Source 
This patch adds support and documentation for
the ref_cpu_cycles perf event.

Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
This commit is contained in:
Nitesh Konkar 2016-12-13 21:31:41 +05:30 committed by John Ferlan
parent 9ae79400ff
commit 71bbe65311
10 changed files with 37 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
docs/formatdomain.html.in
View File

@ -1932,6 +1932,7 @@
&lt;event name='bus_cycles' enabled='no'/&gt;
&lt;event name='stalled_cycles_frontend' enabled='no'/&gt;
&lt;event name='stalled_cycles_backend' enabled='no'/&gt;
&lt;event name='ref_cpu_cycles' enabled='no'/&gt;
&lt;/perf&gt;
...
</pre>
@ -2004,6 +2005,12 @@
processor pipeline by applications running on the platform</td>
<td><code>perf.stalled_cycles_backend</code></td>
</tr>
<tr>
<td><code>ref_cpu_cycles</code></td>
<td>the count of total cpu cycles not affected by CPU frequency scaling
by applications running on the platform</td>
<td><code>perf.ref_cpu_cycles</code></td>
</tr>
</table>
<h3><a name="elementsDevices">Devices</a></h3>

4
docs/news.html.in
View File

@ -37,8 +37,8 @@
<li>perf: Add more perf statistics<br/>
Add support to get the count of branch instructions
executed, branch misses, bus cycles, stalled frontend
cpu cycles, and stalled backend cpu cycles by applications
running on the platform
cpu cycles, stalled backend cpu cycles, and ref cpu
cycles by applications running on the platform
</li>
</ul>
</li>

1
docs/schemas/domaincommon.rng
View File

@ -432,6 +432,7 @@
<value>bus_cycles</value>
<value>stalled_cycles_frontend</value>
<value>stalled_cycles_backend</value>
<value>ref_cpu_cycles</value>
</choice>
</attribute>
<attribute name="enabled">

11
include/libvirt/libvirt-domain.h
View File

@ -2177,6 +2177,17 @@ void virDomainStatsRecordListFree(virDomainStatsRecordPtr *stats);
*/
# define VIR_PERF_PARAM_STALLED_CYCLES_BACKEND "stalled_cycles_backend"
/**
* VIR_PERF_PARAM_REF_CPU_CYCLES:
*
* Macro for typed parameter name that represents ref_cpu_cycles
* perf event which can be used to measure the count of total cpu
* cycles not affected by CPU frequency scaling by applications
* running on the platform. It corresponds to the
* "perf.ref_cpu_cycles" field in the *Stats APIs.
*/
# define VIR_PERF_PARAM_REF_CPU_CYCLES "ref_cpu_cycles"
int virDomainGetPerfEvents(virDomainPtr dom,
virTypedParameterPtr *params,
int *nparams,

4
src/libvirt-domain.c
View File

@ -11246,6 +11246,10 @@ virConnectGetDomainCapabilities(virConnectPtr conn,
* pipeline as unsigned long long. It is
* produced by stalled_cycles_backend
* perf event.
* "perf.ref_cpu_cycles" - The count of total cpu cycles not affected by
* CPU frequency scaling by applications running
* as unsigned long long. It is produced by the
* ref_cpu_cycles 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

1
src/qemu/qemu_driver.c
View File

@ -9858,6 +9858,7 @@ qemuDomainSetPerfEvents(virDomainPtr dom,
VIR_PERF_PARAM_BUS_CYCLES, VIR_TYPED_PARAM_BOOLEAN,
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,
NULL) < 0)
return -1;

5
src/util/virperf.c
View File

@ -43,7 +43,7 @@ VIR_ENUM_IMPL(virPerfEvent, VIR_PERF_EVENT_LAST,
"cache_references", "cache_misses",
"branch_instructions", "branch_misses",
"bus_cycles", "stalled_cycles_frontend",
"stalled_cycles_backend");
"stalled_cycles_backend", "ref_cpu_cycles");
struct virPerfEvent {
int type;
@ -103,6 +103,9 @@ static struct virPerfEventAttr attrs[] = {
{.type = VIR_PERF_EVENT_STALLED_CYCLES_BACKEND,
.attrType = PERF_TYPE_HARDWARE,
.attrConfig = PERF_COUNT_HW_STALLED_CYCLES_BACKEND},
{.type = VIR_PERF_EVENT_REF_CPU_CYCLES,
.attrType = PERF_TYPE_HARDWARE,
.attrConfig = PERF_COUNT_HW_REF_CPU_CYCLES},
};
typedef struct virPerfEventAttr *virPerfEventAttrPtr;

1
src/util/virperf.h
View File

@ -46,6 +46,7 @@ typedef enum {
VIR_PERF_EVENT_STALLED_CYCLES_BACKEND, /* Count of stalled cpu cycles in
the backend of the instruction
processor pipeline */
VIR_PERF_EVENT_REF_CPU_CYCLES, /* Count of ref cpu cycles */
VIR_PERF_EVENT_LAST
} virPerfEventType;

1
tests/genericxml2xmlindata/generic-perf.xml
View File

@ -25,6 +25,7 @@
<event name='bus_cycles' enabled='yes'/>
<event name='stalled_cycles_frontend' enabled='yes'/>
<event name='stalled_cycles_backend' enabled='yes'/>
<event name='ref_cpu_cycles' enabled='yes'/>
</perf>
<devices>
</devices>

6
tools/virsh.pod
View File

@ -950,7 +950,8 @@ I<--perf> returns the statistics of all enabled perf events:
"perf.branch_misses" - the count of branch misses,
"perf.bus_cycles" - the count of bus cycles,
"perf.stalled_cycles_frontend" - the count of stalled frontend cpu cycles,
"perf.stalled_cycles_backend" - the count of stalled backend cpu cycles
"perf.stalled_cycles_backend" - the count of stalled backend cpu cycles,
"perf.ref_cpu_cycles" - the count of ref cpu cycles
See the B<perf> command for more details about each event.
@ -2312,6 +2313,9 @@ B<Valid perf event names>
cycles in the backend of the
instruction processor pipeline by
applications running on the platform.
ref_cpu_cycles - Provides the count of total cpu cycles
not affected by CPU frequency scaling by
applications running on the platform.
B<Note>: The statistics can be retrieved using the B<domstats> command using
the I<--perf> flag.