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| author | Gautham R Shenoy <ego@in.ibm.com> | 2009-03-30 06:55:20 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-01 17:58:03 +0200 |
| commit | 46e0bb9c12f4bab539736f1714cbf16600f681ec (patch) | |
| tree | 755769f792c6b59eadfdda02b6a64166bf0ca8d8 | |
| parent | cpuacct: add per-cgroup utime/stime statistics (diff) | |
| download | linux-46e0bb9c12f4bab539736f1714cbf16600f681ec.tar.xz linux-46e0bb9c12f4bab539736f1714cbf16600f681ec.zip | |
sched: Print sched_group::__cpu_power in sched_domain_debug
Impact: extend debug info /proc/sched_debug
If the user changes the value of the sched_mc/smt_power_savings sysfs
tunable, it'll trigger a rebuilding of the whole sched_domain tree,
with the SD_POWERSAVINGS_BALANCE flag set at certain levels.
As a result, there would be a change in the __cpu_power of sched_groups
in the sched_domain hierarchy.
Print the __cpu_power values for each sched_group in sched_domain_debug
to help verify this change and correlate it with the change in the
load-balancing behavior.
Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20090330045520.2869.24777.stgit@sofia.in.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | kernel/sched.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 8d1bdbe8aafc..6234d10c6a79 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -6963,7 +6963,8 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level, cpumask_or(groupmask, groupmask, sched_group_cpus(group)); cpulist_scnprintf(str, sizeof(str), sched_group_cpus(group)); - printk(KERN_CONT " %s", str); + printk(KERN_CONT " %s (__cpu_power = %d)", str, + group->__cpu_power); group = group->next; } while (group != sd->groups); |