From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753611AbZGCGGT (ORCPT ); Fri, 3 Jul 2009 02:06:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752139AbZGCGGL (ORCPT ); Fri, 3 Jul 2009 02:06:11 -0400 Received: from mail-vw0-f202.google.com ([209.85.212.202]:57532 "EHLO mail-vw0-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751952AbZGCGGL (ORCPT ); Fri, 3 Jul 2009 02:06:11 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=geby4YilKebA23vckrzR46/VnkM5UIkMF/zMlSwEQMTymE8iM/3VCW1GLL5d523IQF UTrAlz6KeJA267iE3gyoiIDX+hvA5V00dx4uGhovqk5c894JQAp6yuBR3AbmJpmMzwPe 3T+mEMEr9zH+qr2v6zPkTXM2Y49h90rgJN9b0= MIME-Version: 1.0 Date: Fri, 3 Jul 2009 11:36:13 +0530 Message-ID: Subject: ring-buffer: Kernel threads cpu utilization. From: Tej To: linux-kernel@vger.kernel.org Cc: srostedt@redhat.com Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org rb_producer and rb_comsumer, kernel thread uses lot of CPU (~100%) bandwidth every 10s. bisection results commit: [5092dbc96f3acdac5433b27c06860352dc6d23b9] ring-buffer: add benchmark and tester I have read commit logs: git log -r 5092dbc96f3acdac5433b27c06860352dc6d23b9 Is it correct behavior for these thread to consume this much cpu bandwidth even if someone selects rb benchmarks config options? thanks -tej