Re: [PATCH] x86: Run checksumming in parallel accross multiple alu's

[David Ahern]

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
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