On Mon, Aug 26, 2013 at 09:45:50AM +0000, Cui, Dexuan wrote: > Hi all, I'm using haswell with linux-3.8.13.4: > http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=commitdiff;h=d1baa1360260b5a01938674fc518109a4e5a148d > and I find the CAGF showed by i915_cur_delayinfo is always twice as gt_cur_freq_mhz, e.g., when the system is idle, I can get the below log: > > ----------------------------- Log begins > # cat /sys/kernel/debug/dri/0/i915_cur_delayinfo; echo; cat /sys/devices/pci0000:00/0000:00:02.0/drm/card0/gt_cur_freq_mhz; echo ; > GT_PERF_STATUS: 0x00000800 > RPSTAT1: 0x00040400 > Render p-state ratio: 8 > Render p-state VID: 0 > Render p-state limit: 255 > CAGF: 400MHz > RP CUR UP EI: 55890us > RP CUR UP: 276us > RP PREV UP: 0us > RP CUR DOWN EI: 94295us > RP CUR DOWN: 389us > RP PREV DOWN: 0us > Lowest (RPN) frequency: 200MHz > Nominal (RP1) frequency: 400MHz > Max non-overclocked (RP0) frequency: 1200MHz > > 200 > ----------------------------- Log ends. > > But with the latest 3.10.0, both values are 200, as expected. > > I guess there is a fix in 3.10.0 I can pick for my 3.8.13.4? > > Thanks, > -- Dexuan > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/intel-gfx Please don't use i915_cur_delayinfo unless you have good reason. However, this is likely what you need: commit f82855d342b6c8483c56e6d2e200a71731509a39 Author: Ben Widawsky <ben@xxxxxxxxxxxx> Date: Tue Jan 29 12:00:15 2013 -0800 drm/i915: Fix CAGF for HSW -- Ben Widawsky, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
