unparseable, undocumented /sys/class/drm/.../pstate
Pavel Machek
pavel at ucw.cz
Sat Jun 21 11:02:01 PDT 2014
Hi!
AFAICT, pstate file will contain something like
07: core 100 MHz memory 123 MHz *
08: core 100-200 MHz memory 123 MHz
...which does not look exactly like one-value-per-file, and I'm pretty
sure userspace will get it wrong if it tries to parse it. Plus, I
don't see required documentation in Documentation/ABI.
Should we disable it for now, so that userspace does not start
depending on it and we'll not have to maintain it forever?
I guess better interface would be something like
pstate/07/core_clock_min
core_clock_max
memory_clock_min
memory_clock_max
and then pstate/active containing just the number of active state?
Thanks,
Pavel
PS: I have no nvidia, got the news at
http://www.phoronix.com/scan.php?page=article&item=nouveau_try_linux316&num=2
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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