diff options
| author | Yan, Zheng <zheng.z.yan@intel.com> | 2014-11-04 21:56:01 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-02-18 17:16:05 +0100 |
| commit | 4af57ef28c2c1047fda9e1a5be02aa7a6a69cf9e (patch) | |
| tree | d186ebdcb589686170bfac7dc97b5d1c613dab9c /include/linux/perf_event.h | |
| parent | e9d7f7cd97c45e2c612d3b38be05b4cfb27939ee (diff) | |
| download | lwn-4af57ef28c2c1047fda9e1a5be02aa7a6a69cf9e.tar.gz lwn-4af57ef28c2c1047fda9e1a5be02aa7a6a69cf9e.zip | |
perf: Add pmu specific data for perf task context
Introduce a new flag PERF_ATTACH_TASK_DATA for perf event's attach
stata. The flag is set by PMU's event_init() callback, it indicates
that perf event needs PMU specific data.
The PMU specific data are initialized to zeros. Later patches will
use PMU specific data to save LBR stack.
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Kan Liang <kan.liang@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: eranian@google.com
Cc: jolsa@redhat.com
Link: http://lkml.kernel.org/r/1415156173-10035-6-git-send-email-kan.liang@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/perf_event.h')
| -rw-r--r-- | include/linux/perf_event.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index c7007a564440..270cd0173e61 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -271,6 +271,10 @@ struct pmu { */ void (*sched_task) (struct perf_event_context *ctx, bool sched_in); + /* + * PMU specific data size + */ + size_t task_ctx_size; }; @@ -307,6 +311,7 @@ struct swevent_hlist { #define PERF_ATTACH_CONTEXT 0x01 #define PERF_ATTACH_GROUP 0x02 #define PERF_ATTACH_TASK 0x04 +#define PERF_ATTACH_TASK_DATA 0x08 struct perf_cgroup; struct ring_buffer; @@ -511,6 +516,7 @@ struct perf_event_context { u64 generation; int pin_count; int nr_cgroups; /* cgroup evts */ + void *task_ctx_data; /* pmu specific data */ struct rcu_head rcu_head; struct delayed_work orphans_remove; |