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| author | Ken Chen <kenchen@google.com> | 2008-12-16 23:41:22 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-18 13:54:01 +0100 |
| commit | 9c2c48020ec0dd6ecd27e5a1298f73b40d85a595 (patch) | |
| tree | 1a44f56e18012120aff0969094eebd572deb2ea3 /include | |
| parent | e9515c3c9feecd74174c2998add0db51e02abb8d (diff) | |
| download | linux-9c2c48020ec0dd6ecd27e5a1298f73b40d85a595.tar.gz linux-9c2c48020ec0dd6ecd27e5a1298f73b40d85a595.tar.bz2 linux-9c2c48020ec0dd6ecd27e5a1298f73b40d85a595.zip | |
schedstat: consolidate per-task cpu runtime stats
Impact: simplify code
When we turn on CONFIG_SCHEDSTATS, per-task cpu runtime is accumulated
twice. Once in task->se.sum_exec_runtime and once in sched_info.cpu_time.
These two stats are exactly the same.
Given that task->se.sum_exec_runtime is always accumulated by the core
scheduler, sched_info can reuse that data instead of duplicate the accounting.
Signed-off-by: Ken Chen <kenchen@google.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sched.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 8cccd6dc5d66..2d1e840ddd35 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -670,8 +670,7 @@ struct reclaim_state; struct sched_info { /* cumulative counters */ unsigned long pcount; /* # of times run on this cpu */ - unsigned long long cpu_time, /* time spent on the cpu */ - run_delay; /* time spent waiting on a runqueue */ + unsigned long long run_delay; /* time spent waiting on a runqueue */ /* timestamps */ unsigned long long last_arrival,/* when we last ran on a cpu */ |