From: Venkatesh Pallipadi Date: Wed, 22 Dec 2010 01:09:03 +0000 (-0800) Subject: sched: Export ns irqtimes through /proc/stat X-Git-Tag: v2.6.39-rc1~509^2~23 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=abb74cefa9c682fb38ba86c17ca3c86fed6cc464;p=pandora-kernel.git sched: Export ns irqtimes through /proc/stat CONFIG_IRQ_TIME_ACCOUNTING adds ns granularity irq time on each CPU. This info is already used in scheduler to do proper task chargeback (earlier patches). This patch retro-fits this ns granularity hardirq and softirq information to /proc/stat irq and softirq fields. The update is still done on timer tick, where we look at accumulated ns hardirq/softirq time and account the tick to user/system/irq/hardirq/guest accordingly. No new interface added. Earlier versions looked at adding this as new fields in some /proc files. This one seems to be the best in terms of impact to existing apps, even though it has somewhat more kernel code than earlier versions. Tested-by: Shaun Ruffell Signed-off-by: Venkatesh Pallipadi Signed-off-by: Peter Zijlstra LKML-Reference: <1292980144-28796-5-git-send-email-venki@google.com> Signed-off-by: Ingo Molnar --- Reading git-diff-tree failed