[PATCH] drm/i915/execlists: Flush the post-sync breadcrumb write harder

[PATCH] drm/i915/execlists: Flush the post-sync breadcrumb write harder

[Chris Wilson]

Quite rarely we see that the CS completion event fires before the
breadcrumb is coherent, which presumably is a result of the CS_STALL not
waiting for the post-sync operation. Try following in a DC_FLUSH into
the following pipecontrol to see if that makes any difference.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
---
 drivers/gpu/drm/i915/gt/intel_lrc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 80a3f1dbb456..48046d445733 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -2971,6 +2971,7 @@ static u32 *gen8_emit_fini_breadcrumb_rcs(struct i915_request *request, u32 *cs)
 	/* XXX flush+write+CS_STALL all in one upsets gem_concurrent_blt:kbl */
 	cs = gen8_emit_pipe_control(cs,
 				    PIPE_CONTROL_FLUSH_ENABLE |
+				    PIPE_CONTROL_DC_FLUSH_ENABLE |
 				    PIPE_CONTROL_CS_STALL,
 				    0);
 
-- 
2.23.0

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✓ Fi.CI.BAT: success for drm/i915/execlists: Flush the post-sync breadcrumb write harder

[Patchwork]

== Series Details ==

Series: drm/i915/execlists: Flush the post-sync breadcrumb write harder
URL   : https://patchwork.freedesktop.org/series/65871/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_6792 -> Patchwork_14200
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  External URL: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/

Known issues
------------

  Here are the changes found in Patchwork_14200 that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_exec_suspend@basic-s3:
    - fi-blb-e6850:       [PASS][1] -> [INCOMPLETE][2] ([fdo#107718])
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/fi-blb-e6850/igt@gem_exec_suspend@basic-s3.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/fi-blb-e6850/igt@gem_exec_suspend@basic-s3.html

  * igt@kms_chamelium@dp-crc-fast:
    - fi-cml-u2:          [PASS][3] -> [FAIL][4] ([fdo#110627])
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/fi-cml-u2/igt@kms_chamelium@dp-crc-fast.html
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/fi-cml-u2/igt@kms_chamelium@dp-crc-fast.html

  * igt@kms_frontbuffer_tracking@basic:
    - fi-hsw-peppy:       [PASS][5] -> [DMESG-WARN][6] ([fdo#102614])
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/fi-hsw-peppy/igt@kms_frontbuffer_tracking@basic.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/fi-hsw-peppy/igt@kms_frontbuffer_tracking@basic.html

  
#### Possible fixes ####

  * igt@i915_selftest@live_execlists:
    - fi-skl-gvtdvm:      [DMESG-FAIL][7] ([fdo#111108]) -> [PASS][8]
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/fi-skl-gvtdvm/igt@i915_selftest@live_execlists.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/fi-skl-gvtdvm/igt@i915_selftest@live_execlists.html

  * igt@kms_frontbuffer_tracking@basic:
    - fi-icl-u2:          [FAIL][9] ([fdo#103167]) -> [PASS][10]
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/fi-icl-u2/igt@kms_frontbuffer_tracking@basic.html
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/fi-icl-u2/igt@kms_frontbuffer_tracking@basic.html

  
#### Warnings ####

  * igt@kms_chamelium@hdmi-hpd-fast:
    - fi-icl-u2:          [FAIL][11] ([fdo#111407]) -> [FAIL][12] ([fdo#109483])
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/fi-icl-u2/igt@kms_chamelium@hdmi-hpd-fast.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/fi-icl-u2/igt@kms_chamelium@hdmi-hpd-fast.html

  
  [fdo#102614]: https://bugs.freedesktop.org/show_bug.cgi?id=102614
  [fdo#103167]: https://bugs.freedesktop.org/show_bug.cgi?id=103167
  [fdo#107718]: https://bugs.freedesktop.org/show_bug.cgi?id=107718
  [fdo#109483]: https://bugs.freedesktop.org/show_bug.cgi?id=109483
  [fdo#110627]: https://bugs.freedesktop.org/show_bug.cgi?id=110627
  [fdo#111108]: https://bugs.freedesktop.org/show_bug.cgi?id=111108
  [fdo#111407]: https://bugs.freedesktop.org/show_bug.cgi?id=111407


Participating hosts (52 -> 43)
------------------------------

  Missing    (9): fi-kbl-soraka fi-hsw-4770r fi-ilk-m540 fi-hsw-4200u fi-byt-squawks fi-bsw-cyan fi-icl-y fi-byt-clapper fi-bdw-samus 


Build changes
-------------

  * CI: CI-20190529 -> None
  * Linux: CI_DRM_6792 -> Patchwork_14200

  CI-20190529: 20190529
  CI_DRM_6792: 87f7792bc3891de3fab4fb64d66a85a66729e3d4 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_5150: a4e8217bcdfef9bb523f26a9084bbf615a6e8abb @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_14200: c4d5dbd2cff36d506ce5f84da812b77434e94cfb @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

c4d5dbd2cff3 drm/i915/execlists: Flush the post-sync breadcrumb write harder

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/
_______________________________________________
Intel-gfx mailing list
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✓ Fi.CI.IGT: success for drm/i915/execlists: Flush the post-sync breadcrumb write harder

[Patchwork]

== Series Details ==

Series: drm/i915/execlists: Flush the post-sync breadcrumb write harder
URL   : https://patchwork.freedesktop.org/series/65871/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_6792_full -> Patchwork_14200_full
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  

Known issues
------------

  Here are the changes found in Patchwork_14200_full that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_exec_parallel@bcs0-contexts:
    - shard-hsw:          [PASS][1] -> [FAIL][2] ([fdo#111469])
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-hsw7/igt@gem_exec_parallel@bcs0-contexts.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-hsw6/igt@gem_exec_parallel@bcs0-contexts.html

  * igt@gem_exec_schedule@reorder-wide-bsd:
    - shard-iclb:         [PASS][3] -> [SKIP][4] ([fdo#111325]) +6 similar issues
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-iclb3/igt@gem_exec_schedule@reorder-wide-bsd.html
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-iclb1/igt@gem_exec_schedule@reorder-wide-bsd.html

  * igt@kms_cursor_crc@pipe-b-cursor-suspend:
    - shard-skl:          [PASS][5] -> [INCOMPLETE][6] ([fdo#110741])
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-skl2/igt@kms_cursor_crc@pipe-b-cursor-suspend.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-skl10/igt@kms_cursor_crc@pipe-b-cursor-suspend.html

  * igt@kms_flip@flip-vs-expired-vblank:
    - shard-glk:          [PASS][7] -> [FAIL][8] ([fdo#105363])
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-glk3/igt@kms_flip@flip-vs-expired-vblank.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-glk3/igt@kms_flip@flip-vs-expired-vblank.html

  * igt@kms_flip@flip-vs-modeset-vs-hang:
    - shard-apl:          [PASS][9] -> [INCOMPLETE][10] ([fdo#103927]) +5 similar issues
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-apl6/igt@kms_flip@flip-vs-modeset-vs-hang.html
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-apl5/igt@kms_flip@flip-vs-modeset-vs-hang.html

  * igt@kms_frontbuffer_tracking@fbc-1p-pri-indfb-multidraw:
    - shard-iclb:         [PASS][11] -> [FAIL][12] ([fdo#103167]) +4 similar issues
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-iclb3/igt@kms_frontbuffer_tracking@fbc-1p-pri-indfb-multidraw.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-iclb1/igt@kms_frontbuffer_tracking@fbc-1p-pri-indfb-multidraw.html

  * igt@kms_frontbuffer_tracking@fbc-suspend:
    - shard-apl:          [PASS][13] -> [DMESG-WARN][14] ([fdo#108566]) +4 similar issues
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-apl2/igt@kms_frontbuffer_tracking@fbc-suspend.html
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-apl4/igt@kms_frontbuffer_tracking@fbc-suspend.html

  * igt@kms_frontbuffer_tracking@fbcpsr-rgb101010-draw-mmap-gtt:
    - shard-iclb:         [PASS][15] -> [INCOMPLETE][16] ([fdo#106978] / [fdo#107713])
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-iclb3/igt@kms_frontbuffer_tracking@fbcpsr-rgb101010-draw-mmap-gtt.html
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-iclb7/igt@kms_frontbuffer_tracking@fbcpsr-rgb101010-draw-mmap-gtt.html

  * igt@kms_frontbuffer_tracking@psr-1p-primscrn-cur-indfb-draw-mmap-gtt:
    - shard-skl:          [PASS][17] -> [FAIL][18] ([fdo#103167])
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-skl3/igt@kms_frontbuffer_tracking@psr-1p-primscrn-cur-indfb-draw-mmap-gtt.html
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-skl8/igt@kms_frontbuffer_tracking@psr-1p-primscrn-cur-indfb-draw-mmap-gtt.html

  * igt@kms_psr@suspend:
    - shard-skl:          [PASS][19] -> [INCOMPLETE][20] ([fdo#108972])
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-skl2/igt@kms_psr@suspend.html
   [20]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-skl3/igt@kms_psr@suspend.html

  * igt@prime_busy@hang-bsd2:
    - shard-iclb:         [PASS][21] -> [SKIP][22] ([fdo#109276]) +21 similar issues
   [21]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-iclb1/igt@prime_busy@hang-bsd2.html
   [22]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-iclb7/igt@prime_busy@hang-bsd2.html

  * igt@tools_test@sysfs_l3_parity:
    - shard-hsw:          [PASS][23] -> [SKIP][24] ([fdo#109271])
   [23]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-hsw2/igt@tools_test@sysfs_l3_parity.html
   [24]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-hsw1/igt@tools_test@sysfs_l3_parity.html

  
#### Possible fixes ####

  * igt@gem_ctx_shared@exec-single-timeline-bsd:
    - shard-iclb:         [SKIP][25] ([fdo#110841]) -> [PASS][26]
   [25]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-iclb1/igt@gem_ctx_shared@exec-single-timeline-bsd.html
   [26]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-iclb6/igt@gem_ctx_shared@exec-single-timeline-bsd.html

  * igt@gem_exec_schedule@fifo-bsd1:
    - shard-iclb:         [SKIP][27] ([fdo#109276]) -> [PASS][28] +17 similar issues
   [27]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-iclb5/igt@gem_exec_schedule@fifo-bsd1.html
   [28]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-iclb1/igt@gem_exec_schedule@fifo-bsd1.html

  * igt@gem_exec_schedule@wide-bsd:
    - shard-iclb:         [SKIP][29] ([fdo#111325]) -> [PASS][30] +8 similar issues
   [29]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-iclb4/igt@gem_exec_schedule@wide-bsd.html
   [30]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-iclb7/igt@gem_exec_schedule@wide-bsd.html

  * igt@gem_wait@write-wait-vecs0:
    - shard-skl:          [DMESG-WARN][31] ([fdo#106107]) -> [PASS][32] +1 similar issue
   [31]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-skl7/igt@gem_wait@write-wait-vecs0.html
   [32]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-skl5/igt@gem_wait@write-wait-vecs0.html

  * igt@kms_cursor_edge_walk@pipe-b-128x128-top-edge:
    - shard-apl:          [INCOMPLETE][33] ([fdo#103927]) -> [PASS][34]
   [33]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-apl8/igt@kms_cursor_edge_walk@pipe-b-128x128-top-edge.html
   [34]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-apl6/igt@kms_cursor_edge_walk@pipe-b-128x128-top-edge.html

  * igt@kms_flip@flip-vs-expired-vblank:
    - shard-skl:          [FAIL][35] ([fdo#105363]) -> [PASS][36] +1 similar issue
   [35]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-skl5/igt@kms_flip@flip-vs-expired-vblank.html
   [36]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-skl4/igt@kms_flip@flip-vs-expired-vblank.html

  * igt@kms_flip@flip-vs-suspend-interruptible:
    - shard-skl:          [INCOMPLETE][37] ([fdo#109507]) -> [PASS][38]
   [37]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-skl8/igt@kms_flip@flip-vs-suspend-interruptible.html
   [38]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-skl2/igt@kms_flip@flip-vs-suspend-interruptible.html

  * igt@kms_frontbuffer_tracking@fbc-1p-offscren-pri-indfb-draw-render:
    - shard-iclb:         [FAIL][39] ([fdo#103167]) -> [PASS][40] +5 similar issues
   [39]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-iclb6/igt@kms_frontbuffer_tracking@fbc-1p-offscren-pri-indfb-draw-render.html
   [40]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-iclb3/igt@kms_frontbuffer_tracking@fbc-1p-offscren-pri-indfb-draw-render.html

  * igt@kms_frontbuffer_tracking@fbcpsr-1p-primscrn-cur-indfb-draw-mmap-wc:
    - shard-skl:          [FAIL][41] ([fdo#103167]) -> [PASS][42] +2 similar issues
   [41]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-skl4/igt@kms_frontbuffer_tracking@fbcpsr-1p-primscrn-cur-indfb-draw-mmap-wc.html
   [42]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-skl5/igt@kms_frontbuffer_tracking@fbcpsr-1p-primscrn-cur-indfb-draw-mmap-wc.html

  * igt@kms_plane@plane-panning-bottom-right-suspend-pipe-b-planes:
    - shard-apl:          [DMESG-WARN][43] ([fdo#108566]) -> [PASS][44] +3 similar issues
   [43]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-apl7/igt@kms_plane@plane-panning-bottom-right-suspend-pipe-b-planes.html
   [44]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-apl6/igt@kms_plane@plane-panning-bottom-right-suspend-pipe-b-planes.html

  * igt@kms_plane_alpha_blend@pipe-b-coverage-7efc:
    - shard-skl:          [FAIL][45] ([fdo#108145] / [fdo#110403]) -> [PASS][46]
   [45]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-skl10/igt@kms_plane_alpha_blend@pipe-b-coverage-7efc.html
   [46]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-skl9/igt@kms_plane_alpha_blend@pipe-b-coverage-7efc.html

  * igt@kms_plane_lowres@pipe-a-tiling-x:
    - shard-iclb:         [FAIL][47] ([fdo#103166]) -> [PASS][48]
   [47]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-iclb7/igt@kms_plane_lowres@pipe-a-tiling-x.html
   [48]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-iclb3/igt@kms_plane_lowres@pipe-a-tiling-x.html

  * igt@perf_pmu@enable-race-rcs0:
    - shard-iclb:         [INCOMPLETE][49] ([fdo#107713]) -> [PASS][50]
   [49]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-iclb7/igt@perf_pmu@enable-race-rcs0.html
   [50]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-iclb1/igt@perf_pmu@enable-race-rcs0.html

  
#### Warnings ####

  * igt@gem_ctx_isolation@vcs1-nonpriv:
    - shard-iclb:         [FAIL][51] ([fdo#111329]) -> [SKIP][52] ([fdo#109276])
   [51]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-iclb4/igt@gem_ctx_isolation@vcs1-nonpriv.html
   [52]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-iclb8/igt@gem_ctx_isolation@vcs1-nonpriv.html

  * igt@gem_mocs_settings@mocs-reset-bsd2:
    - shard-iclb:         [SKIP][53] ([fdo#109276]) -> [FAIL][54] ([fdo#111330]) +1 similar issue
   [53]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-iclb5/igt@gem_mocs_settings@mocs-reset-bsd2.html
   [54]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-iclb4/igt@gem_mocs_settings@mocs-reset-bsd2.html

  * igt@kms_content_protection@atomic:
    - shard-apl:          [FAIL][55] ([fdo#110321] / [fdo#110336]) -> [INCOMPLETE][56] ([fdo#103927])
   [55]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6792/shard-apl4/igt@kms_content_protection@atomic.html
   [56]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/shard-apl4/igt@kms_content_protection@atomic.html

  
  [fdo#103166]: https://bugs.freedesktop.org/show_bug.cgi?id=103166
  [fdo#103167]: https://bugs.freedesktop.org/show_bug.cgi?id=103167
  [fdo#103927]: https://bugs.freedesktop.org/show_bug.cgi?id=103927
  [fdo#105363]: https://bugs.freedesktop.org/show_bug.cgi?id=105363
  [fdo#106107]: https://bugs.freedesktop.org/show_bug.cgi?id=106107
  [fdo#106978]: https://bugs.freedesktop.org/show_bug.cgi?id=106978
  [fdo#107713]: https://bugs.freedesktop.org/show_bug.cgi?id=107713
  [fdo#108145]: https://bugs.freedesktop.org/show_bug.cgi?id=108145
  [fdo#108566]: https://bugs.freedesktop.org/show_bug.cgi?id=108566
  [fdo#108972]: https://bugs.freedesktop.org/show_bug.cgi?id=108972
  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [fdo#109276]: https://bugs.freedesktop.org/show_bug.cgi?id=109276
  [fdo#109507]: https://bugs.freedesktop.org/show_bug.cgi?id=109507
  [fdo#110321]: https://bugs.freedesktop.org/show_bug.cgi?id=110321
  [fdo#110336]: https://bugs.freedesktop.org/show_bug.cgi?id=110336
  [fdo#110403]: https://bugs.freedesktop.org/show_bug.cgi?id=110403
  [fdo#110741]: https://bugs.freedesktop.org/show_bug.cgi?id=110741
  [fdo#110841]: https://bugs.freedesktop.org/show_bug.cgi?id=110841
  [fdo#111325]: https://bugs.freedesktop.org/show_bug.cgi?id=111325
  [fdo#111329]: https://bugs.freedesktop.org/show_bug.cgi?id=111329
  [fdo#111330]: https://bugs.freedesktop.org/show_bug.cgi?id=111330
  [fdo#111469]: https://bugs.freedesktop.org/show_bug.cgi?id=111469


Participating hosts (10 -> 10)
------------------------------

  No changes in participating hosts


Build changes
-------------

  * CI: CI-20190529 -> None
  * Linux: CI_DRM_6792 -> Patchwork_14200

  CI-20190529: 20190529
  CI_DRM_6792: 87f7792bc3891de3fab4fb64d66a85a66729e3d4 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_5150: a4e8217bcdfef9bb523f26a9084bbf615a6e8abb @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_14200: c4d5dbd2cff36d506ce5f84da812b77434e94cfb @ git://anongit.freedesktop.org/gfx-ci/linux
  piglit_4509: fdc5a4ca11124ab8413c7988896eec4c97336694 @ git://anongit.freedesktop.org/piglit

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_14200/
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Re: [PATCH] drm/i915/execlists: Flush the post-sync breadcrumb write harder

[Mika Kuoppala]

Chris Wilson <chris@chris-wilson.co.uk> writes:

> Quite rarely we see that the CS completion event fires before the
> breadcrumb is coherent, which presumably is a result of the CS_STALL not
> waiting for the post-sync operation. Try following in a DC_FLUSH into
> the following pipecontrol to see if that makes any difference.
>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>

Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>

> ---
>  drivers/gpu/drm/i915/gt/intel_lrc.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
> index 80a3f1dbb456..48046d445733 100644
> --- a/drivers/gpu/drm/i915/gt/intel_lrc.c
> +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
> @@ -2971,6 +2971,7 @@ static u32 *gen8_emit_fini_breadcrumb_rcs(struct i915_request *request, u32 *cs)
>  	/* XXX flush+write+CS_STALL all in one upsets gem_concurrent_blt:kbl */
>  	cs = gen8_emit_pipe_control(cs,
>  				    PIPE_CONTROL_FLUSH_ENABLE |
> +				    PIPE_CONTROL_DC_FLUSH_ENABLE |
>  				    PIPE_CONTROL_CS_STALL,
>  				    0);
>  
> -- 
> 2.23.0
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Re: [PATCH] drm/i915/execlists: Flush the post-sync breadcrumb write harder

[Chris Wilson]

Quoting Mika Kuoppala (2019-08-28 13:49:55)
> Chris Wilson <chris@chris-wilson.co.uk> writes:
> 
> > Quite rarely we see that the CS completion event fires before the
> > breadcrumb is coherent, which presumably is a result of the CS_STALL not
> > waiting for the post-sync operation. Try following in a DC_FLUSH into
> > the following pipecontrol to see if that makes any difference.
> >
> > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> > Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
> 
> Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>

Yup, there's only way to find out if this helps... Ta,
-Chris
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Re: [PATCH] drm/i915/execlists: Flush the post-sync breadcrumb write harder

[Chris Wilson]

Quoting Chris Wilson (2019-08-28 14:09:23)
> Quoting Mika Kuoppala (2019-08-28 13:49:55)
> > Chris Wilson <chris@chris-wilson.co.uk> writes:
> > 
> > > Quite rarely we see that the CS completion event fires before the
> > > breadcrumb is coherent, which presumably is a result of the CS_STALL not
> > > waiting for the post-sync operation. Try following in a DC_FLUSH into
> > > the following pipecontrol to see if that makes any difference.
> > >
> > > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> > > Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
> > 
> > Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
> 
> Yup, there's only way to find out if this helps... Ta,

And the answer came back straight away. Nope.

Sigh,
-Chris
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