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| author | Rakib Mullick <rakib.mullick@gmail.com> | 2012-01-24 22:33:56 +0600 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2012-01-27 13:28:53 +0100 |
| commit | 30fd049afcfed50e022704036e8629d6bdfe84e6 (patch) | |
| tree | 829472524c157f1d7a769d088b2f9b70c9779c11 | |
| parent | 4ec4412e1e91f44a3dcb97b6c9172a13fc78bac9 (diff) | |
| download | linux-stable-30fd049afcfed50e022704036e8629d6bdfe84e6.tar.gz linux-stable-30fd049afcfed50e022704036e8629d6bdfe84e6.tar.bz2 linux-stable-30fd049afcfed50e022704036e8629d6bdfe84e6.zip | |
sched: Remove sched_switch
Currently we don't utilize the sched_switch field anymore.
But, simply removing sched_switch field from the middle of the
sched_stat output will break tools.
So, to stay compatible we hardcode it to zero and remove the
field from the scheduler data structures.
Update the schedstat documentation accordingly.
Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1327422836.27181.5.camel@localhost.localdomain
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | Documentation/scheduler/sched-stats.txt | 3 | ||||
| -rw-r--r-- | kernel/sched/debug.c | 1 | ||||
| -rw-r--r-- | kernel/sched/sched.h | 1 | ||||
| -rw-r--r-- | kernel/sched/stats.c | 4 |
4 files changed, 4 insertions, 5 deletions
diff --git a/Documentation/scheduler/sched-stats.txt b/Documentation/scheduler/sched-stats.txt index 1cd5d51bc761..8259b34a66ae 100644 --- a/Documentation/scheduler/sched-stats.txt +++ b/Documentation/scheduler/sched-stats.txt @@ -38,7 +38,8 @@ First field is a sched_yield() statistic: 1) # of times sched_yield() was called Next three are schedule() statistics: - 2) # of times we switched to the expired queue and reused it + 2) This field is a legacy array expiration count field used in the O(1) + scheduler. We kept it for ABI compatibility, but it is always set to zero. 3) # of times schedule() was called 4) # of times schedule() left the processor idle diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c index 2a075e10004b..09acaa15161d 100644 --- a/kernel/sched/debug.c +++ b/kernel/sched/debug.c @@ -288,7 +288,6 @@ static void print_cpu(struct seq_file *m, int cpu) P(yld_count); - P(sched_switch); P(sched_count); P(sched_goidle); #ifdef CONFIG_SMP diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 98c0c2623db8..8a2c768d2f98 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -462,7 +462,6 @@ struct rq { unsigned int yld_count; /* schedule() stats */ - unsigned int sched_switch; unsigned int sched_count; unsigned int sched_goidle; diff --git a/kernel/sched/stats.c b/kernel/sched/stats.c index 2a581ba8e190..903ffa9e8872 100644 --- a/kernel/sched/stats.c +++ b/kernel/sched/stats.c @@ -32,9 +32,9 @@ static int show_schedstat(struct seq_file *seq, void *v) /* runqueue-specific stats */ seq_printf(seq, - "cpu%d %u %u %u %u %u %u %llu %llu %lu", + "cpu%d %u 0 %u %u %u %u %llu %llu %lu", cpu, rq->yld_count, - rq->sched_switch, rq->sched_count, rq->sched_goidle, + rq->sched_count, rq->sched_goidle, rq->ttwu_count, rq->ttwu_local, rq->rq_cpu_time, rq->rq_sched_info.run_delay, rq->rq_sched_info.pcount); |