Re: [PATCH 3/3] perf: bench: fix memcpy/memset output

[Ingo Molnar]

* Rabin Vincent <rabin.vincent@xxxxxxxx> wrote:

> The memcpy and memset benchmarks return bogus results when iterations >
> 0 because the iterations value is not taken into account when
> calculating the final result:
> 
>  $ perf bench mem memset --only-prefault --length 1GB --iterations 1
>  # Running 'mem/memset' benchmark:
>  # Copying 1GB Bytes ...
> 
>        20.798669 GB/Sec (with prefault)
>  $ perf bench mem memset --only-prefault --length 1GB --iterations 10
>  # Running 'mem/memset' benchmark:
>  # Copying 1GB Bytes ...
> 
>         2.086576 GB/Sec (with prefault)
>  $ perf bench mem memset --only-prefault --length 1GB --iterations 100
>  # Running 'mem/memset' benchmark:
>  # Copying 1GB Bytes ...
> 
>       212.840917 MB/Sec (with prefault)
> 
> Fix this.
> 
> Signed-off-by: Rabin Vincent <rabin.vincent@xxxxxxxx>

Acked-by: Ingo Molnar <mingo@xxxxxxxxxx>

Thanks,

	Ingo
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