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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-09-02 16:50:03 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-09-09 20:46:33 +0200 |
| commit | 8dc85d547285668e509f86c177bcd4ea055bcaaf (patch) | |
| tree | 5474dd6c31952b342f0a3f1bcec09e3049129264 /include/linux/perf_event.h | |
| parent | eb184479874238393ac186c4e054d24311c34aaa (diff) | |
| download | lwn-8dc85d547285668e509f86c177bcd4ea055bcaaf.tar.gz lwn-8dc85d547285668e509f86c177bcd4ea055bcaaf.zip | |
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.h | 1 |
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 { int * __percpu pmu_disable_count; struct perf_cpu_context * __percpu pmu_cpu_context; + int task_ctx_nr; /* * Fully disable/enable this PMU, can be used to protect from the PMI |