Messages in this thread | | | Date | Tue, 29 Oct 2013 07:49:07 -0400 | From | Neil Horman <> | Subject | Re: [PATCH] x86: Run checksumming in parallel accross multiple alu's |
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On Tue, Oct 29, 2013 at 12:30:31PM +0100, Ingo Molnar wrote: > > * Neil Horman <nhorman@tuxdriver.com> wrote: > > > Sure it was this: > > for i in `seq 0 1 3` > > do > > echo $i > /sys/module/csum_test/parameters/module_test_mode > > taskset -c 0 perf stat --repeat 20 -C 0 -ddd perf bench sched messaging -- /root/test.sh > > done >> counters.txt 2>&1 > > > > where test.sh is: > > #!/bin/sh > > echo 1 > /sys/module/csum_test/parameters/test_fire > > What does '-- /root/test.sh' do? > > Unless I'm missing something, the line above will run: > > perf bench sched messaging -- /root/test.sh > > which should be equivalent to: > > perf bench sched messaging > > i.e. /root/test.sh won't be run. > 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
Neil
> Thanks, > > Ingo >
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