[llvm-dev] New LLD performance builder

[Galina Kistanova via llvm-dev]

Sudo was in place.

But somehow it still had multiple cores in the shield.
Now it must be just 1 core. Should make the difference with variations but
slower to test.

Thanks

Galina


On Mon, Mar 26, 2018 at 1:16 PM, Galina Kistanova <gkistanova at gmail.com>
wrote:

> Hi Rafael,
>
> Thanks for mentioning this.
>
> It should be running as root, but I'll double check anyway.
>
> Thanks
>
> Galina
>
> On Mon, Mar 26, 2018 at 10:47 AM, Rafael Avila de Espindola <
> rafael.espindola at gmail.com> wrote:
>
>> Galina Kistanova <gkistanova at gmail.com> writes:
>>
>> > Disabling swap and having a single CPU in the shield group didn't change
>> > much, besides cpu-migrations and context-switches, which now are 0
>> > obviously.
>> > That clustering remains the same. It is also stable to the number of
>> runs
>> > (I have changed the test to run 20 times in the middle of that range on
>> the
>> > right).
>> >
>> > http://lnt.llvm.org/db_default/v4/link/graph?highlight_run=
>> 426&plot.9=1.9.6
>> >
>> > Unless somebody has a good idea what else we should try, it seems we
>> have
>> > it as good as it could be with the current approach.
>>
>> I am benchmarking a patch and just remembered one thing: cset will only
>> enable the shield if run as root, but it will still run the program
>> outside otherwise.
>>
>> Is the benchmark being run as root? if not that might explain the large
>> variations from run to run.
>>
>> Cheers,
>> Rafael
>>
>
>
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