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586428852a
linux/drivers/gpu/drm/i915
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Daniel Vetter 586428852a drm/i915: implement inline clflush for pwrite 
In micro-benchmarking of the usual pwrite use-pattern of alternating
pwrites with gtt domain reads from the gpu, this yields around 30%
improvement of pwrite throughput across all buffers size. The trick is
that we can avoid clflush cachelines that we will overwrite completely
anyway.

Furthermore for partial pwrites it gives a proportional speedup on top
of the 30% percent because we only clflush back the part of the buffer
we're actually writing.

v2: Simplify the clflush-before-write logic, as suggested by Chris
Wilson.

v3: Finishing touches suggested by Chris Wilson:
- add comment to needs_clflush_before and only set this if the bo is
  uncached.
- s/needs_clflush/needs_clflush_after/ in the write paths to clearly
  differentiate it from needs_clflush_before.

Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-03-27 13:28:45 +02:00
..
dvo_ch7xxx.c Drivers: i915: Fix all space related issues. 2011-09-19 18:01:47 -07:00
dvo_ch7017.c Drivers: i915: Fix all space related issues. 2011-09-19 18:01:47 -07:00
dvo_ivch.c Drivers: i915: Fix all space related issues. 2011-09-19 18:01:47 -07:00
dvo_sil164.c Drivers: i915: Fix all space related issues. 2011-09-19 18:01:47 -07:00
dvo_tfp410.c Drivers: i915: Fix all space related issues. 2011-09-19 18:01:47 -07:00
dvo.h
i915_debugfs.c drm/i915: [dinq] shut up six instances of -Warray-bounds 2012-03-22 17:45:06 +01:00
i915_dma.c drm/i915: clear the entire gtt when using gem 2012-03-27 13:15:24 +02:00
i915_drv.c drm/i915: move NEEDS_FORCE_WAKE to i915_drv.c 2012-03-23 23:45:50 +01:00
i915_drv.h drm/i915: kill ranged cpu read domain support 2012-03-27 13:25:32 +02:00
i915_gem_debug.c drm/i915: drop KM_USER0 argument to k(un)map_atomic 2011-10-20 15:26:37 -07:00
i915_gem_evict.c drm/i915: No need to search again after retiring requests 2012-02-27 17:37:13 +01:00
i915_gem_execbuffer.c drm/i915: Avoid using mappable space for relocation processing through the CPU 2012-03-27 13:16:17 +02:00
i915_gem_gtt.c drm/i915: clear the entire gtt when using gem 2012-03-27 13:15:24 +02:00
i915_gem_tiling.c drm/i915: swizzling support for snb/ivb 2012-02-08 23:16:24 +01:00
i915_gem.c drm/i915: implement inline clflush for pwrite 2012-03-27 13:28:45 +02:00
i915_ioc32.c
i915_irq.c drm/i915: bind objects to the global gtt only when needed 2012-03-20 21:52:01 +01:00
i915_reg.h drm/i915: re-order GT IIR bit definitions 2012-03-23 23:46:40 +01:00
i915_suspend.c drm/i915: Re-enable gen7 RC6 and GPU turbo after resume. 2012-01-24 13:25:10 -08:00
i915_trace_points.c
i915_trace.h Drivers: i915: Fix all space related issues. 2011-09-19 18:01:47 -07:00
intel_acpi.c drm/i915: remove ACPI related DRM_ERRORs 2012-03-02 19:23:44 +01:00
intel_bios.c drm/i915: Check VBIOS value for determining LVDS dual channel mode, too 2012-03-22 23:23:45 +01:00
intel_bios.h drm/i915: VBT Parser cleanup for eDP block 2012-01-13 08:37:44 -08:00
intel_crt.c drm/i915: don't allow interlaced pipeconf on gen2 2012-02-10 17:28:45 +01:00
intel_display.c drm/i915/sdov: switch IS_SDVOB to a flag 2012-03-24 15:55:53 +01:00
intel_dp.c drm/i915: use the new hdmi_force_audio enum more 2012-02-27 17:45:36 +01:00
intel_drv.h drm/i915/sdov: switch IS_SDVOB to a flag 2012-03-24 15:55:53 +01:00
intel_dvo.c drm/i915: fixup interlaced vertical timings confusion, part 1 2012-02-10 17:24:06 +01:00
intel_fb.c drm: do not set fb_info->pixmap fields 2012-02-09 10:34:43 +00:00
intel_hdmi.c drm/i915: add a "force-dvi" HDMI audio mode 2012-02-14 10:03:18 +01:00
intel_i2c.c drm/i915: enable gmbus on gen2 2012-03-25 22:35:14 +02:00
intel_lvds.c drm/i915: Ignore LVDS on hp t5745 and hp st5747 thin client 2012-02-27 11:12:38 +01:00
intel_modes.c Merge remote-tracking branch 'airlied/drm-next' into for-airlied 2012-02-23 14:56:11 +01:00
intel_opregion.c i915: Add and use pr_fmt and pr_<level> 2012-03-18 21:50:21 +01:00
intel_overlay.c Revert "drivers/gpu/drm/i915/intel_overlay.c needs seq_file.h" 2012-02-16 10:31:23 +01:00
intel_panel.c i915: Add and use pr_fmt and pr_<level> 2012-03-18 21:50:21 +01:00
intel_ringbuffer.c drm/i915: Add wait_for in init_ring_common 2012-03-18 19:10:06 +01:00
intel_ringbuffer.h drm/i915: Record the tail at each request and use it to estimate the head 2012-02-15 14:26:03 +01:00
intel_sdvo_regs.h misc latin1 to utf8 conversions 2012-01-02 13:04:55 +01:00
intel_sdvo.c drm/i915/sdov: switch IS_SDVOB to a flag 2012-03-24 15:55:53 +01:00
intel_sprite.c Merge tag 'drm-intel-next-2012-02-07' of git://people.freedesktop.org/~danvet/drm-intel into drm-core-next 2012-02-14 14:16:00 +00:00
intel_tv.c drm/i915: reinstate GM45 TV detection fix 2012-03-27 13:12:28 +02:00
Makefile drm/i915: kill i915_mem.c 2012-01-17 20:01:01 +01:00