From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ahern Subject: Re: [PATCH] x86: Run checksumming in parallel accross multiple alu's Date: Tue, 29 Oct 2013 08:12:58 -0600 Message-ID: <526FC26A.8050806@gmail.com> References: <20131017003421.GA31470@hmsreliant.think-freely.org> <20131017084121.GC22705@gmail.com> <20131028160131.GA31048@hmsreliant.think-freely.org> <20131028162438.GB14350@gmail.com> <20131028174630.GB31048@hmsreliant.think-freely.org> <20131028182913.GD31048@hmsreliant.think-freely.org> <20131029082542.GA24625@gmail.com> <20131029112022.GA24477@neilslaptop.think-freely.org> <20131029113031.GA16897@gmail.com> <20131029114907.GE24477@neilslaptop.think-freely.org> <20131029125233.GA17449@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Eric Dumazet , linux-kernel@vger.kernel.org, sebastien.dugue@bull.net, Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, netdev@vger.kernel.org To: Ingo Molnar , Neil Horman Return-path: In-Reply-To: <20131029125233.GA17449@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On 10/29/13 6:52 AM, Ingo Molnar wrote: >> According to the perf man page, I'm supposed to be able to use -- >> to separate perf command line parameters from the command I want >> to run. And it definately executed test.sh, I added an echo to >> stdout in there as a test run and observed them get captured in >> counters.txt > > Well, '--' can be used to delineate the command portion for cases > where it's ambiguous. > > Here's it's unambiguous though. This: > > perf stat --repeat 20 -C 0 -ddd perf bench sched messaging -- /root/test.sh > > stops parsing a valid option after the -ddd option, so in theory it > should execute 'perf bench sched messaging -- /root/test.sh' where > '-- /root/test.sh' is simply a parameter to 'perf bench' and is thus > ignored. Normally with perf commands a workload can be specified to state how long to collect perf data. That is not the case for perf-bench. David