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| author | Peter Zijlstra | 2009-05-05 17:50:23 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2009-05-05 20:18:31 +0200 |
| commit | 6de6a7b95705b859b61430fa3afa1403034eb3e6 (patch) | |
| tree | 29214ae667a58aa005d0ed13e51c265fa675adf0 /include | |
| parent | perf_counter: uncouple data_head updates from wakeups (diff) | |
| download | kernel-qcow2-linux-6de6a7b95705b859b61430fa3afa1403034eb3e6.tar.gz kernel-qcow2-linux-6de6a7b95705b859b61430fa3afa1403034eb3e6.tar.xz kernel-qcow2-linux-6de6a7b95705b859b61430fa3afa1403034eb3e6.zip | |
perf_counter: add ioctl(PERF_COUNTER_IOC_RESET)
Provide a way to reset an existing counter - this eases PAPI
libraries around perfcounters.
Similar to read() it doesn't collapse pending child counters.
[ Impact: new perfcounter fd ioctl method to reset counters ]
Suggested-by: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <20090505155437.022272933@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/perf_counter.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h index 17b63105f2aa..0fcbf34a4f73 100644 --- a/include/linux/perf_counter.h +++ b/include/linux/perf_counter.h @@ -160,6 +160,7 @@ struct perf_counter_hw_event { #define PERF_COUNTER_IOC_ENABLE _IO ('$', 0) #define PERF_COUNTER_IOC_DISABLE _IO ('$', 1) #define PERF_COUNTER_IOC_REFRESH _IOW('$', 2, u32) +#define PERF_COUNTER_IOC_RESET _IO ('$', 3) /* * Structure of the page that can be mapped via mmap |