From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frederic Weisbecker Subject: Re: [PATCH 1/6] vmscan: tracing: Roll up of patches currently in mmotm Date: Fri, 30 Jul 2010 16:04:42 +0200 Message-ID: <20100730140441.GB5269@nowhere> References: <1280497020-22816-1-git-send-email-mel@csn.ul.ie> <1280497020-22816-2-git-send-email-mel@csn.ul.ie> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Dave Chinner , Chris Mason , Nick Piggin , Rik van Riel , Johannes Weiner , Christoph Hellwig , Wu Fengguang , KAMEZAWA Hiroyuki , KOSAKI Motohiro , Andrea Arcangeli To: Mel Gorman Return-path: Content-Disposition: inline In-Reply-To: <1280497020-22816-2-git-send-email-mel@csn.ul.ie> Sender: owner-linux-mm@kvack.org List-Id: linux-fsdevel.vger.kernel.org On Fri, Jul 30, 2010 at 02:36:55PM +0100, Mel Gorman wrote: > This is a roll-up of patches currently in mmotm related to stack reduction and > tracing reclaim. It is based on 2.6.35-rc6 and included for the convenience > of testing. > > No signed off required. > --- > .../trace/postprocess/trace-vmscan-postprocess.pl | 654 ++++++++++++++++++++ I have the feeling you've made an ad-hoc post processing script that seems to rewrite all the format parsing, debugfs, stream handling, etc... we have that in perf tools already. May be you weren't aware of what we have in perf in terms of scripting support. First, launch perf list and spot the events you're interested in, let's say you're interested in irqs: $ perf list [...] irq:irq_handler_entry [Tracepoint event] irq:irq_handler_exit [Tracepoint event] irq:softirq_entry [Tracepoint event] irq:softirq_exit [Tracepoint event] [...] Now do a trace record: # perf record -e irq:irq_handler_entry -e irq:irq_handler_exit -e irq:softirq_entry -e irq:softirq_exit cmd or more simple: # perf record -e irq:* cmd You can use -a instead of cmd for wide tracing. Now generate a perf parsing script on top of these traces: # perf trace -g perl generated Perl script: perf-trace.pl Fill up the trace handlers inside perf-trace.pl and just run it: # perf trace -s perf-trace.pl Once ready, you can place your script in the script directory. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org