Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934437AbbGVPAn (ORCPT ); Wed, 22 Jul 2015 11:00:43 -0400 Received: from casper.infradead.org ([85.118.1.10]:47141 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932206AbbGVPAm (ORCPT ); Wed, 22 Jul 2015 11:00:42 -0400 Date: Wed, 22 Jul 2015 17:00:35 +0200 From: Peter Zijlstra To: Vince Weaver Cc: linux-kernel@vger.kernel.org, Ingo Molnar , Arnaldo Carvalho de Melo Subject: Re: perf: multiplexing broken on amd fam16h? Message-ID: <20150722150035.GU25159@twins.programming.kicks-ass.net> References: <20150721193224.GW19282@twins.programming.kicks-ass.net> <20150722122208.GB19282@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 983 Lines: 27 On Wed, Jul 22, 2015 at 10:57:23AM -0400, Vince Weaver wrote: > On Wed, 22 Jul 2015, Peter Zijlstra wrote: > > Can you run with something like the below? > > OK, so I have to admit I'm a bit weak on ftrace. What type of command > line are you interested in seeing? The ones I've tried with trace-cmd > have activated your trace_printks but there's 500MB of other data mixed > in so maybe I am doing something wrong. something along the lines of: echo function > /debug/tracing/current_tracer echo nop > /debug/tracing/current_tracer echo 0 > /debug/tracing/trace ./check_multiplexing echo 0 > /debug/tracing/tracing_on cat /debug/tracing/trace > ~/trace.log I've no idea how trace-cmd works, I don't even think I have it :-) -- 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/