[LKP] [drm/mgag200] 90f479ae51: vm-scalability.median -18.8% regression

Thomas Zimmermann tzimmermann at suse.de
Wed Sep 4 06:53:25 UTC 2019


Am 04.09.19 um 08:27 schrieb Feng Tang:
>> Thank you for testing. But don't get too excited, because the patch
>> simulates a bug that was present in the original mgag200 code. A
>> significant number of frames are simply skipped. That is apparently the
>> reason why it's faster.
> Thanks for the detailed info, so the original code skips time-consuming
> work inside atomic context on purpose. Is there any space to optmise it?
> If 2 scheduled update worker are handled at almost same time, can one be
> skipped?

To my knowledge, there's only one instance of the worker. Re-scheduling
the worker before a previous instance started, will not create a second
instance. The worker's instance will complete all pending updates. So in
some way, skipping workers already happens.

Best regards

> Thanks,
> Feng
>> Best regards
>> Thomas
> _______________________________________________
> dri-devel mailing list
> dri-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

Thomas Zimmermann
Graphics Driver Developer
SUSE Linux GmbH, Maxfeldstrasse 5, 90409 Nuernberg, Germany
GF: Felix Imend├Ârffer, Mary Higgins, Sri Rasiah
HRB 21284 (AG N├╝rnberg)

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: OpenPGP digital signature
URL: <https://lists.freedesktop.org/archives/dri-devel/attachments/20190904/cd9d4519/attachment.sig>

More information about the dri-devel mailing list