On Sat, Jun 21, 2014 at 2:50 PM, Pavel Machek <pavel@xxxxxx> wrote: > On Sat 2014-06-21 14:22:59, Ilia Mirkin wrote: >> On Sat, Jun 21, 2014 at 2:02 PM, Pavel Machek <pavel@xxxxxx> wrote: >> > 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. > ... >> >> FTR, this file has been in place since 3.13, and there was a different >> file before it (performance_levels), with a comparable format since >> much earlier (definitely 3.8, probably earlier). I think it's meant >> a > > According to the article, it is only starting to work now. I know > articles can be wrong, but I don't have that hardware... Sorry if it > is the case. Commit 26fdd78cce3f51a49e1f2d3ad27ee893a28d220e introduced this particular one. Commit 330c5988ee78045e6a731c3693251aaa5b0d14e3 had introduced the former version, which was removed in 3.13, replaced with the new one. > >> lot more for people looking at it and echo'ing stuff to it to modify >> the levels (where supported), than for programs parsing it. Perhaps >> sysfs is the wrong place for this -- what is the right place? debugfs? > > debugfs would work, yes. > Pavel > -- > (english) http://www.livejournal.com/~pavelmachek > (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
