From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753546AbaB0Neh (ORCPT ); Thu, 27 Feb 2014 08:34:37 -0500 Received: from terminus.zytor.com ([198.137.202.10]:55065 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751905AbaB0Neb (ORCPT ); Thu, 27 Feb 2014 08:34:31 -0500 Date: Thu, 27 Feb 2014 05:34:01 -0800 From: tip-bot for Peter Zijlstra Message-ID: Cc: linux-kernel@vger.kernel.org, eranian@google.com, hpa@zytor.com, mingo@kernel.org, peterz@infradead.org, tglx@linutronix.de Reply-To: mingo@kernel.org, hpa@zytor.com, eranian@google.com, linux-kernel@vger.kernel.org, peterz@infradead.org, tglx@linutronix.de To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf: Optimize group_sched_in() Git-Commit-ID: 4a2345937c17722bd2979f662ae909846b4a052a X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 4a2345937c17722bd2979f662ae909846b4a052a Gitweb: http://git.kernel.org/tip/4a2345937c17722bd2979f662ae909846b4a052a Author: Peter Zijlstra AuthorDate: Mon, 24 Feb 2014 12:43:31 +0100 Committer: Ingo Molnar CommitDate: Thu, 27 Feb 2014 12:43:26 +0100 perf: Optimize group_sched_in() Use the ctx pmu instead of the event pmu. When a group leader is a software event but the group contains hardware events, the entire group is on the hardware PMU. Using the hardware PMU for the transaction makes most sense since that's the most expensive one to programm (and software PMUs generally don't have TXN support anyway). Signed-off-by: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-sctoo9t2f3nn2c9g568928q3@git.kernel.org Signed-off-by: Ingo Molnar --- kernel/events/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/events/core.c b/kernel/events/core.c index 823a53d..661951a 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -1733,7 +1733,7 @@ group_sched_in(struct perf_event *group_event, struct perf_event_context *ctx) { struct perf_event *event, *partial_group = NULL; - struct pmu *pmu = group_event->pmu; + struct pmu *pmu = ctx->pmu; u64 now = ctx->time; bool simulate = false;