From: Gautham R Shenoy Date: Mon, 30 Mar 2009 04:55:20 +0000 (+0530) Subject: sched: Print sched_group::__cpu_power in sched_domain_debug X-Git-Tag: v2.6.30-rc2~101^2~3 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=46e0bb9c12f4bab539736f1714cbf16600f681ec 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 Cc: Peter Zijlstra LKML-Reference: <20090330045520.2869.24777.stgit@sofia.in.ibm.com> Signed-off-by: Ingo Molnar --- 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);