Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756846AbYLEPfh (ORCPT ); Fri, 5 Dec 2008 10:35:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754589AbYLEPf3 (ORCPT ); Fri, 5 Dec 2008 10:35:29 -0500 Received: from mx2.redhat.com ([66.187.237.31]:47051 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752245AbYLEPf2 (ORCPT ); Fri, 5 Dec 2008 10:35:28 -0500 To: Jiaying Zhang Cc: Steven Rostedt , linux-kernel@vger.kernel.org, Michael Rubin , Martin Bligh , Michael Davidson , Andrew Morton Subject: Re: [RFC PATCH 3/3] kernel tracing prototype References: <5df78e1d0812021626y68c7241ahfdba4d37c7840e10@mail.gmail.com> <1228278908.4886.49.camel@localhost.localdomain> <5df78e1d0812022130g7c5a004bnd729d0a8454f24ed@mail.gmail.com> <5df78e1d0812050004q505cba8dnee39997a84d67847@mail.gmail.com> From: fche@redhat.com (Frank Ch. Eigler) Date: Fri, 05 Dec 2008 10:34:50 -0500 In-Reply-To: <5df78e1d0812050004q505cba8dnee39997a84d67847@mail.gmail.com> (Jiaying Zhang's message of "Fri, 5 Dec 2008 00:04:54 -0800") Message-ID: User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1021 Lines: 30 Jiaying Zhang writes: > To better answer the question why we want to implement a new kernel > tracing prototype, here are some performance results we collected before > with the tbench benchmark. Thanks. > - vanilla 2.6.26 kernel, CONFIG_MARKERS=n > Throughput 759.352 MB/sec 4 > - markers compiled in, tracing disabled > Throughput 754.18 MB/sec 4 Is your kernel built with -freorder-blocks? This option dramatically reduces the cost of inactive markers/tracepoints. > - tracing syscall entry/exit, use markers, not logging data to ring_buffer > Throughput 715.68 MB/sec 4 > - tracing syscall entry/exit, use markers, logging data to ring_buffer > Throughput 654.056 MB/sec 4 (By the way, how are you doing syscall entry/exit tracing?) - FChE -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/