Created attachment 88467 [details] Perf report for bad commit System Environment: ---------------------------------------------- Platform: BYT-M Libdrm:(master)2.4.47-2-g45810d3d7546f3ddbcdae114c6726ada30e919c9 Mesa: (master)git-8bd4476 Xserver: (master)xorg-server-1.14.99.3-24-g902ff0b3497d20 Xf86_video_intel: (master)2.99.905-41-ged16e34c00d5eb5c Cairo: (master)98fef3cef2d0f7f463a2e4f9f1b35b09f7b6ea77 Kernel: (drm-intel-nightly) 164a4cb4c1431a Bug detailed description: ---------------------------------------------- X11perf –aa10text performance reduced ~78% on Raw X and gnome-session. The problem only exists on BYT-M. It’s Xf86_video_intel regression, bisecting show that the first bad commit is: 40d4199f151a39ecebf127cf468b4470d2906f4e Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Mon Oct 28 10:45:52 2013 +0000 sna: Use page-count for mappable aperture size For consistency with the other aperture metrics and correctness when passing around required number of pages. Signed-off-by: Chris Wilson chris@chris-wilson.co.uk Performance -------------------------------------------------------------------- X11perf –aa10text on Raw X drm-intel-next-queued git-40d4199 git-9266e35 1490000 6860000 Reproduce steps: --------------------------------------------- 1, xinit& 2, vblank_mode=0 x11perf –a10text
Created attachment 88468 [details] Perf report for good commit
commit 6b1a6f32179f7bff8503c6b8b38351a7cf1d08b7 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Fri Nov 1 10:48:06 2013 +0000 sna: Scale uses of aperture_mappable by PAGE_SIZE After converting aperture_mappable to count in pages, there were a few residual users expecting a byte count. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=71117 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Verified it.
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