diff options
| author | Peter Zijlstra | 2010-09-02 16:50:03 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2010-09-09 20:46:33 +0200 |
| commit | 8dc85d547285668e509f86c177bcd4ea055bcaaf (patch) | |
| tree | 5474dd6c31952b342f0a3f1bcec09e3049129264 /include/linux/sched.h | |
| parent | perf: Clean up perf_event_context allocation (diff) | |
| download | kernel-qcow2-linux-8dc85d547285668e509f86c177bcd4ea055bcaaf.tar.gz kernel-qcow2-linux-8dc85d547285668e509f86c177bcd4ea055bcaaf.tar.xz kernel-qcow2-linux-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/sched.h')
| -rw-r--r-- | include/linux/sched.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 1e2a6db2d7dd..89d6023c6f82 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1160,6 +1160,12 @@ struct sched_rt_entity { struct rcu_node; +enum perf_event_task_context { + perf_invalid_context = -1, + perf_hw_context = 0, + perf_nr_task_contexts, +}; + struct task_struct { volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */ void *stack; @@ -1431,7 +1437,7 @@ struct task_struct { struct futex_pi_state *pi_state_cache; #endif #ifdef CONFIG_PERF_EVENTS - struct perf_event_context *perf_event_ctxp; + struct perf_event_context *perf_event_ctxp[perf_nr_task_contexts]; struct mutex perf_event_mutex; struct list_head perf_event_list; #endif |