ww-mutex performance tests?

Wed Apr 4 18:02:41 UTC 2018

On Tue, Apr 3, 2018 at 10:37 AM, Maarten Lankhorst
<maarten.lankhorst at linux.intel.com> wrote:
> Op 02-04-18 om 19:49 schreef Thomas Hellstrom:
>> Maarten, Daniel,
>>
>> Do we have any ww-mutex performance tests somewhere that can be used to test the impact of implementation details on various locking scenarios?
>>
>> Thanks,
>>
>> /Thomas
>>
>>
> The thing that comes to my mind are some of the kms_cursor_legacy tests that have been proven to be sensitive to locking issues before.
> All subtests with (pipe-*/all-pipes)-(single/forked/torture)-(bo/move) try to do cursor updates as fast as possible, and report how many updates have been done.

AMD folks have a bunch of tests to exercise their CS paths I think,
that should be interesting for the multi-ww_mutex/backoff paths,
adding Christian et al.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch