From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S967441AbdIZCrf (ORCPT ); Mon, 25 Sep 2017 22:47:35 -0400 Received: from smtprelay0226.hostedemail.com ([216.40.44.226]:38649 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S965923AbdIZCre (ORCPT ); Mon, 25 Sep 2017 22:47:34 -0400 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Spam-Summary: 2,0,0,,d41d8cd98f00b204,rostedt@goodmis.org,:::::::,RULES_HIT:41:355:379:541:599:800:960:973:988:989:1260:1277:1311:1313:1314:1345:1359:1437:1515:1516:1518:1534:1538:1593:1594:1711:1714:1730:1747:1777:1792:2393:2553:2559:2562:2693:3138:3139:3140:3141:3142:3350:3622:3865:3867:3871:3872:3874:5007:6261:7875:10004:10400:10848:10967:11232:11658:11914:12663:12740:12760:12895:13069:13255:13311:13357:13439:14181:14659:14721:21080:21627:30054:30090:30091,0,RBL:none,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:,MSBL:0,DNSBL:none,Custom_rules:0:0:0,LFtime:2,LUA_SUMMARY:none X-HE-Tag: touch53_7928c7df680e X-Filterd-Recvd-Size: 1903 Date: Mon, 25 Sep 2017 22:47:25 -0400 From: Steven Rostedt To: Joel Fernandes Cc: Peter Zijlstra , LKML , kernel-team@android.com Subject: Re: [PATCH v6 2/2] tracing: Add support for preempt and irq enable/disable events Message-ID: <20170925224725.3309f8c3@vmware.local.home> In-Reply-To: References: <20170922015024.16123-1-joelaf@google.com> <20170922015024.16123-3-joelaf@google.com> <20170922090229.rdicci6emtyffqdn@hirez.programming.kicks-ass.net> <20170925083432.jvaewlsrb46wjmjj@hirez.programming.kicks-ass.net> <20170925061528.09082957@vmware.local.home> <20170925103223.horr6amiunw6if3n@hirez.programming.kicks-ass.net> <20170925065226.137ec45e@vmware.local.home> X-Mailer: Claws Mail 3.15.0-dirty (GTK+ 2.24.31; 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 Mon, 25 Sep 2017 15:57:30 -0700 Joel Fernandes wrote: > 2. This stuff is already a bit trace heavy, I prefer not to generate > event every time the preempt count increases. Ofcourse filters but > still then we have the filtering overhead for a usecase that I am not > really targetting with this patchset. This is actually a key reason I would agree with Joel. Just tracing the toggle is extremely heavy. Adding all the other calls will probably make it useless. -- Steve