On Mon, Aug 24, 2015 at 05:28:13PM +0530, ankitprasad.r.sharma@xxxxxxxxx wrote: > From: Ankitprasad Sharma <ankitprasad.r.sharma@xxxxxxxxx> > > We are trying to reduce the time for which the global 'struct_mutex' > is locked. Execbuffer ioctl is one place where it is generally held > for the longest time. And sometimes because of this occasional > glitches/flickers are observed in 60 fps playback (due to miss of > V-blank intervals) as page flip calls gets blocked/delayed because the > 'struct_mutex' is already locked. > > For this, we have exposed two new flags in GEM_CREATE ioctl, to pre-populate > the object with system memory pages and also do an immediate clflush for the > new pages. > > The third patch too tries to reduce the 'struct_mutex' lock time by > moving only those objects to CPU domain in put_pages(), that can either > be used in the future or had a CPU mapping. > > This series is based on an earlier series of Stolen Memory patches, > extending the GEM_CREATE ioctl further > http://lists.freedesktop.org/archives/intel-gfx/2015-July/072199.html > > Ankitprasad Sharma (2): > drm/i915: Support for pre-populating the object with system pages > drm/i915: Support for the clflush of pre-populated pages > > Chris Wilson (1): > drm/i915: Only move to the CPU write domain if keeping the GTT pages Usual broken maintainer record: Needs igt and userspace. And for the case of the put_pages optimization probably really nasty igt. -Daniel > > drivers/gpu/drm/i915/i915_dma.c | 2 +- > drivers/gpu/drm/i915/i915_drv.h | 5 ++ > drivers/gpu/drm/i915/i915_gem.c | 116 ++++++++++++++++++++++++++++++---------- > include/uapi/drm/i915_drm.h | 12 ++--- > 4 files changed, 101 insertions(+), 34 deletions(-) > > -- > 1.9.1 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
