From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932480AbcHISao (ORCPT ); Tue, 9 Aug 2016 14:30:44 -0400 Received: from smtprelay0092.hostedemail.com ([216.40.44.92]:51560 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932193AbcHISal (ORCPT ); Tue, 9 Aug 2016 14:30:41 -0400 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Spam-Summary: 2,0,0,,d41d8cd98f00b204,rostedt@goodmis.org,:::::::::::::::::::,RULES_HIT:41:355:379:541:599:800:960:973:988:989:1260:1277:1311:1313:1314:1345:1359:1437:1515:1516:1518:1534:1539:1593:1594:1711:1730:1747:1777:1792:2393:2553:2559:2562:2895:3138:3139:3140:3141:3142:3352:3622:3865:3866:3867:3868:3870:3872:3874:4250:5007:6261:7875:7903:10004:10400:10848:10967:11232:11658:11914:12517:12519:12663:12740:13069:13311:13357:13439:14181:14659:14721:21080:30012:30054:30070:30090:30091,0,RBL:none,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:none,Custom_rules:0:0:0,LFtime:2,LUA_SUMMARY:none X-HE-Tag: place67_3fc237ae81026 X-Filterd-Recvd-Size: 1908 Date: Tue, 9 Aug 2016 14:30:36 -0400 From: Steven Rostedt To: Clark Williams Cc: Carsten Emde , linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org, Ingo Molnar , Andrew Morton , Thomas Gleixner , Jon Masters , Daniel Wagner , Sebastian Andrzej Siewior Subject: Re: [RFC][PATCH 0/3] tracing: Add Hardware Latency detector tracer Message-ID: <20160809143036.72f9f67b@gandalf.local.home> In-Reply-To: <20160809131516.6a83e93e@sluggy.hsv.redhat.com> References: <20160804145708.158968389@goodmis.org> <20160804113033.78132a93@gandalf.local.home> <20160809131516.6a83e93e@sluggy.hsv.redhat.com> X-Mailer: Claws Mail 3.13.2 (GTK+ 2.24.30; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 9 Aug 2016 13:15:16 -0500 Clark Williams wrote: > On Thu, 4 Aug 2016 11:30:33 -0400 > Steven Rostedt wrote: > > > Note, I'm currently working on adding code to detect NMIs to this as > > well. And perhaps even tracing SMI counters. Just to show what caused > > the latency, as latency isn't measured by the counters (that I know of). > > > > I like the trace report, but for one small thing; I think it's worth > either adding units to the reported latency values (us suffix) or > putting in a header line that hwlatdetect values are reported in > microseconds. Yeah, adding "us" to the time stamps would be useful. I'll update. -- Steve