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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2010-09-02 10:50:03 -0400
committerIngo Molnar <mingo@elte.hu>2010-09-09 14:46:33 -0400
commit8dc85d547285668e509f86c177bcd4ea055bcaaf (patch)
tree5474dd6c31952b342f0a3f1bcec09e3049129264 /include/linux/perf_event.h
parenteb184479874238393ac186c4e054d24311c34aaa (diff)
perf: Multiple task contexts
Provide the infrastructure for multiple task contexts. A more flexible approach would have resulted in more pointer chases in the scheduling hot-paths. This approach has the limitation of a static number of task contexts. Since I expect most external PMUs to be system wide, or at least node wide (as per the intel uncore unit) they won't actually need a task context. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/perf_event.h')
-rw-r--r--include/linux/perf_event.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 22155ef3b362..9ecfd856ce6e 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -572,6 +572,7 @@ struct pmu {
572 572
573 int * __percpu pmu_disable_count; 573 int * __percpu pmu_disable_count;
574 struct perf_cpu_context * __percpu pmu_cpu_context; 574 struct perf_cpu_context * __percpu pmu_cpu_context;
575 int task_ctx_nr;
575 576
576 /* 577 /*
577 * Fully disable/enable this PMU, can be used to protect from the PMI 578 * Fully disable/enable this PMU, can be used to protect from the PMI