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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-05-20 12:21:20 +0200
committerIngo Molnar <mingo@elte.hu>2009-05-20 12:43:33 +0200
commit26b119bc811a73bac6ecf95bdf284bf31c7955f0 (patch)
treecc8b39284012c27c4014c253655cff7ee95f79ce /include/linux
parentd7b629a34fc4134a43c730b5f0197855dc4948d0 (diff)
perf_counter: Log irq_period changes
For the dynamic irq_period code, log whenever we change the period so that analyzing code can normalize the event flow. [ Impact: add new feature to allow more precise profiling ] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: John Kacur <jkacur@redhat.com> LKML-Reference: <20090520102553.298769743@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/perf_counter.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index c8c1dfc22c9..f612941ef46 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -258,6 +258,14 @@ enum perf_event_type {
PERF_EVENT_COMM = 3,
/*
+ * struct {
+ * struct perf_event_header header;
+ * u64 irq_period;
+ * };
+ */
+ PERF_EVENT_PERIOD = 4,
+
+ /*
* When header.misc & PERF_EVENT_MISC_OVERFLOW the event_type field
* will be PERF_RECORD_*
*