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perfcounters: add task migrations counter

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Impact: add new feature, new sw counter

Add a counter that counts the number of cross-CPU migrations a
task is suffering.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2008-12-14 12:34:15 +01:00
commit 6c594c21fc
4 changed files with 61 additions and 6 deletions
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3
include/linux/sched.h
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@ -1014,6 +1014,8 @@ struct sched_entity {
u64 last_wakeup;
u64 avg_overlap;
u64 nr_migrations;
#ifdef CONFIG_SCHEDSTATS
u64 wait_start;
u64 wait_max;
@ -1029,7 +1031,6 @@ struct sched_entity {
u64 exec_max;
u64 slice_max;
u64 nr_migrations;
u64 nr_migrations_cold;
u64 nr_failed_migrations_affine;
u64 nr_failed_migrations_running;