From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751534AbaAYFUl (ORCPT ); Sat, 25 Jan 2014 00:20:41 -0500 Received: from moutng.kundenserver.de ([212.227.17.8]:58312 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750889AbaAYFUi (ORCPT ); Sat, 25 Jan 2014 00:20:38 -0500 Message-ID: <1390627226.3625.18.camel@marge.simpson.net> Subject: Re: [PATCH] rcu: Eliminate softirq processing from rcutree From: Mike Galbraith To: Sebastian Andrzej Siewior Cc: linux-rt-users@vger.kernel.org, Steven Rostedt , linux-kernel@vger.kernel.org, Thomas Gleixner , "Paul E. McKenney" Date: Sat, 25 Jan 2014 06:20:26 +0100 In-Reply-To: <20140124194642.GA29981@linutronix.de> References: <20131221193900.GA8427@linutronix.de> <1387681647.5412.25.camel@marge.simpson.net> <1387702631.5412.101.camel@marge.simpson.net> <1387773533.5369.16.camel@marge.simpson.net> <1387775559.5369.20.camel@marge.simpson.net> <20140124194642.GA29981@linutronix.de> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 X-Provags-ID: V02:K0:Thvqj5GM/vpgIDwbwlpoCOudJEY2RO1nLGZf1BjvMpE v4EeA8YWyRDvfbODY0YZSlB2jul4M706GgaHhsoIjSgdhGVqwc +5nPqP2ycr8o15PBNsp6G6PgWULHxzs01GVh4GvW/5Hg+JQ0Ta C/eZ75F/DEd//FsQAhXvT5cepLJ/KEh9DwHJNrFdy5QB2CJoc+ 1S9a0sy/fC2bsYpQ/3jK6DIDDbk1sy/0MvkKnTT/wiutRWMlOu 7tAAym+hojq2i0RYl5U/s8VDnJbb2KUM2Bxfx290d+pN36yhla g7m3zYmL5zl+Lqy45qLkiy90p1GBdzGSTJovwCgNlk65UmY4p4 J1ToxDQqRJTg2IV5Je+9zlNkHfJPNOR0PaXB5HsISbvBUNdSGA nEXaXDcjzkxQg== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2014-01-24 at 20:46 +0100, Sebastian Andrzej Siewior wrote: > * Mike Galbraith | 2013-12-23 06:12:39 [+0100]: > > >P.S. > > > >virgin -rt7 doing tbench 64 + make -j64 > > > >[ 97.907960] perf samples too long (3138 > 2500), lowering kernel.perf_event_max_sample_rate to 50000 > >[ 103.047921] perf samples too long (5544 > 5000), lowering kernel.perf_event_max_sample_rate to 25000 > >[ 181.561271] perf samples too long (10318 > 10000), lowering kernel.perf_event_max_sample_rate to 13000 > >[ 184.243750] INFO: NMI handler (perf_event_nmi_handler) took too long to run: 1.084 msecs > >[ 248.914422] perf samples too long (19719 > 19230), lowering kernel.perf_event_max_sample_rate to 7000 > >[ 382.116674] NOHZ: local_softirq_pending 10 > This is block > > >[ 405.201593] perf samples too long (36824 > 35714), lowering kernel.perf_event_max_sample_rate to 4000 > >[ 444.704185] NOHZ: local_softirq_pending 08 > >[ 444.704208] NOHZ: local_softirq_pending 08 > >[ 444.704579] NOHZ: local_softirq_pending 08 > >[ 444.704678] NOHZ: local_softirq_pending 08 > >[ 444.705100] NOHZ: local_softirq_pending 08 > >[ 444.705980] NOHZ: local_softirq_pending 08 > >[ 444.705994] NOHZ: local_softirq_pending 08 > >[ 444.708315] NOHZ: local_softirq_pending 08 > >[ 444.710348] NOHZ: local_softirq_pending 08 > > and this is RX. Is your testcase heavy disk-io or heavy disk-io + > network? Yeah. -Mike