From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757836Ab0JYWbS (ORCPT ); Mon, 25 Oct 2010 18:31:18 -0400 Received: from smtp-out.google.com ([74.125.121.35]:47173 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751746Ab0JYWbP (ORCPT ); Mon, 25 Oct 2010 18:31:15 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=google.com; s=beta; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=XqDWQen5XqGZXMfdRbxtVEABQGywnPW8YGypIhNQLYBssZm9mewu9CFQx80mg7N8WV bNErLU+7/Qelk01UEa/A== From: Venkatesh Pallipadi To: Peter Zijlstra , Ingo Molnar , "H. Peter Anvin" , Thomas Gleixner , Balbir Singh , Martin Schwidefsky Cc: linux-kernel@vger.kernel.org, Paul Turner , Eric Dumazet , Shaun Ruffell , Yong Zhang , Venkatesh Pallipadi Subject: [PATCH 6/6] Account ksoftirqd time as cpustat softirq -v1 Date: Mon, 25 Oct 2010 15:30:17 -0700 Message-Id: <1288045817-3135-7-git-send-email-venki@google.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1288045817-3135-1-git-send-email-venki@google.com> References: <1288045817-3135-1-git-send-email-venki@google.com> X-System-Of-Record: true Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org softirq time in ksoftirqd context is not accounted in ns granularity per cpu softirq stats, as we want that to be a part of ksoftirqd exec_runtime. Accounting them as softirq on /proc/stat separately. Tested-by: Shaun Ruffell Signed-off-by: Venkatesh Pallipadi --- kernel/sched.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/kernel/sched.c b/kernel/sched.c index 49f6f61..0955050 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -3617,6 +3617,14 @@ static void irqtime_account_process_tick(struct task_struct *p, int user_tick, cpustat->irq = cputime64_add(cpustat->irq, tmp); } else if (irqtime_account_si_update()) { cpustat->softirq = cputime64_add(cpustat->softirq, tmp); + } else if (this_cpu_ksoftirqd() == p) { + /* + * ksoftirqd time do not get accounted in cpu_softirq_time. + * So, we have to handle it separately here. + * Also, p->stime needs to be updated for ksoftirqd. + */ + __account_system_time(p, cputime_one_jiffy, one_jiffy_scaled, + &cpustat->softirq); } else if (user_tick) { account_user_time(p, cputime_one_jiffy, one_jiffy_scaled); } else if (p == rq->idle) { -- 1.7.1