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| author | Runzhen Wang <runzhen@linux.vnet.ibm.com> | 2013-06-28 08:14:57 (GMT) |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-07-12 16:46:09 (GMT) |
| commit | cfe0d8ba14a1d98245b371e486c68f37eba1ca52 (patch) | |
| tree | 73ba840aa9a401befd3425d1eba0d7b63a81f851 /arch/powerpc/include | |
| parent | d4ae0a6f7c79be64c8f3551dd149189f8c4480eb (diff) | |
| download | linux-fsl-qoriq-cfe0d8ba14a1d98245b371e486c68f37eba1ca52.tar.xz | |
perf tools: Make Power7 events available for perf
Power7 supports over 530 different perf events but only a small subset
of these can be specified by name, for the remaining events, we must
specify them by their raw code:
perf stat -e r2003c <application>
This patch makes all the POWER7 events available in sysfs. So we can
instead specify these as:
perf stat -e 'cpu/PM_CMPLU_STALL_DFU/' <application>
where PM_CMPLU_STALL_DFU is the r2003c in previous example.
Before this patch is applied, the size of power7-pmu.o is:
$ size arch/powerpc/perf/power7-pmu.o
text data bss dec hex filename
3073 2720 0 5793 16a1 arch/powerpc/perf/power7-pmu.o
and after the patch is applied, it is:
$ size arch/powerpc/perf/power7-pmu.o
text data bss dec hex filename
15950 31112 0 47062 b7d6 arch/powerpc/perf/power7-pmu.o
For the run time overhead, I use two scripts, one is "event_name.sh",
which contains 50 event names, it looks like:
# ./perf record -e 'cpu/PM_CMPLU_STALL_DFU/' -e ..... /bin/sleep 1
the other one is named "event_code.sh" which use corresponding events
raw
code instead of events names, it looks like:
# ./perf record -e r2003c -e ...... /bin/sleep 1
below is the result.
Using events name:
[root@localhost perf]# time ./event_name.sh
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.002 MB perf.data (~102 samples) ]
real 0m1.192s
user 0m0.028s
sys 0m0.106s
Using events raw code:
[root@localhost perf]# time ./event_code.sh
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.003 MB perf.data (~112 samples) ]
real 0m1.198s
user 0m0.028s
sys 0m0.105s
Signed-off-by: Runzhen Wang <runzhen@linux.vnet.ibm.com>
Acked-by: Michael Ellerman <michael@ellerman.id.au>
Cc: icycoder@gmail.com
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Michael Ellerman <michael@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Runzhen Wang <runzhew@clemson.edu>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1372407297-6996-3-git-send-email-runzhen@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/perf_event_server.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/perf_event_server.h b/arch/powerpc/include/asm/perf_event_server.h index f265049..d9270d8 100644 --- a/arch/powerpc/include/asm/perf_event_server.h +++ b/arch/powerpc/include/asm/perf_event_server.h @@ -136,11 +136,11 @@ extern ssize_t power_events_sysfs_show(struct device *dev, #define EVENT_PTR(_id, _suffix) &EVENT_VAR(_id, _suffix).attr.attr #define EVENT_ATTR(_name, _id, _suffix) \ - PMU_EVENT_ATTR(_name, EVENT_VAR(_id, _suffix), PME_PM_##_id, \ + PMU_EVENT_ATTR(_name, EVENT_VAR(_id, _suffix), PME_##_id, \ power_events_sysfs_show) #define GENERIC_EVENT_ATTR(_name, _id) EVENT_ATTR(_name, _id, _g) #define GENERIC_EVENT_PTR(_id) EVENT_PTR(_id, _g) -#define POWER_EVENT_ATTR(_name, _id) EVENT_ATTR(PM_##_name, _id, _p) +#define POWER_EVENT_ATTR(_name, _id) EVENT_ATTR(_name, _id, _p) #define POWER_EVENT_PTR(_id) EVENT_PTR(_id, _p) |