Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965103Ab3IDRxu (ORCPT ); Wed, 4 Sep 2013 13:53:50 -0400 Received: from mail-ea0-f182.google.com ([209.85.215.182]:57207 "EHLO mail-ea0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964786Ab3IDRxt (ORCPT ); Wed, 4 Sep 2013 13:53:49 -0400 MIME-Version: 1.0 In-Reply-To: <20130903132933.GA24955@gmail.com> References: <20130903132933.GA24955@gmail.com> Date: Wed, 4 Sep 2013 10:53:47 -0700 X-Google-Sender-Auth: seGha5GRQ4bonq6cJviCi6PhFqI Message-ID: Subject: Re: [GIT PULL] perf changes for v3.12 From: Linus Torvalds To: Ingo Molnar Cc: Linux Kernel Mailing List , Arnaldo Carvalho de Melo , Peter Zijlstra , Thomas Gleixner , Andrew Morton Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id r84HrsHf024701 Content-Length: 1502 Lines: 35 On Tue, Sep 3, 2013 at 6:29 AM, Ingo Molnar wrote: > > Please pull the latest perf-core-for-linus git tree from: I don't think this is new at all, but I just tried to do a perf record/report of "make -j64 test" on git: It's a big perf.data file (1.6G), but after it has done the "processing time ordered events" thing it results in: ┌─Warning:───────────────────────────────────┐ │Processed 8672030 events and lost 71 chunks!│ │Check IO/CPU overload! │ │ │ │ │ │Press any key... │ └────────────────────────────────────────────┘ and then it just hangs using 100% CPU time. Pressing any key doesn't do anything. It may well still be *doing* something, and maybe it will come back some day with results. But it sure doesn't show any indication that it will. Try this (in a current git source tree: note, by "git" I actually mean git itself, not some random git repository):: perf record -g -e cycles:pp make -j64 test >& out perf report maybe you can reproduce it. Linus ????{.n?+???????+%?????ݶ??w??{.n?+????{??G?????{ay?ʇڙ?,j??f???h?????????z_??(?階?ݢj"???m??????G????????????&???~???iO???z??v?^?m???? ????????I?