Now we use the first chunk id as the id of a composited layer. If the id changes, we will create a new layer. To avoid unnecessary layer re-creation, we need to stabilize the ids.
The following revision refers to this bug: https://chromium.googlesource.com/chromium/src.git/+/b63383e4e3f2b774ce0e6d3bfafb4adc84e48f2b commit b63383e4e3f2b774ce0e6d3bfafb4adc84e48f2b Author: Xianzhu Wang <wangxianzhu@chromium.org> Date: Thu May 17 00:45:19 2018 [SPv175+] Force multiple chunks under subsequences This increases stability of chunk ids under subsequences to reduce full chunk invalidation because of chunk id changes. This especially improves chunk id stability that was reduced by crrev.com/c/1027209. This also helps to stabilize composited layer ids for SPv2, though I need some more work for it (crbug.com/842356). An example: Paint N-1: { ScopedPaintChunkProperties properties1(id1, same_properties); PaintBackground(); } { ScopedPaintChunkProperties properties2(id2, same_properties); PaintForeground(); } Paint N: { ScopedPaintChunkProperties properties2(id2, same_properties); PaintForeground(); } Previously, in Paint N-1, we combined both background and foreground in chunk(id1), and in Paint N, we painted forground in chunk(id2). Because the paint invalidator saw that chunk(id1) disappeared and chunk(id2) appeared, it issued full chunk invalidation for chunk(id1) and chunk(id2). With this CL we'll force chunk for background and foreground, so we'll issue chunk invalidation for the background only. Measurements: For all compositing and paint layout tests, this increases total number of chunks from 3390 to 3676. (For comparison, crrev.com/c/1027209 reduced the number from 4055 to 3390.) Bug: 838456 ,842356 Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2 Change-Id: I4e9809fee46364189845b293706ff70554f562ba Reviewed-on: https://chromium-review.googlesource.com/1040876 Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org> Reviewed-by: Philip Rogers <pdr@chromium.org> Cr-Commit-Position: refs/heads/master@{#559370} [modify] https://crrev.com/b63383e4e3f2b774ce0e6d3bfafb4adc84e48f2b/third_party/WebKit/LayoutTests/FlagExpectations/enable-slimming-paint-v2 [modify] https://crrev.com/b63383e4e3f2b774ce0e6d3bfafb4adc84e48f2b/third_party/WebKit/LayoutTests/flag-specific/enable-slimming-paint-v2/paint/invalidation/bugzilla-6473-expected.txt [modify] https://crrev.com/b63383e4e3f2b774ce0e6d3bfafb4adc84e48f2b/third_party/WebKit/LayoutTests/flag-specific/enable-slimming-paint-v2/paint/invalidation/clip/outline-clip-change-expected.txt [modify] 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The following revision refers to this bug: https://chromium.googlesource.com/chromium/src.git/+/44ab27047d914c47ac888a5daa0977703750767f commit 44ab27047d914c47ac888a5daa0977703750767f Author: Xianzhu Wang <wangxianzhu@chromium.org> Date: Sat Jun 23 00:27:56 2018 [RasterInvalidation] Track explicit and implicit full composited layer invalidation 1. For explicit full composited layer invalidation (Pre-SPv2 only) which is issued by GraphicsLayer::SetNeedsDisplay(): - Use more descriptive reason kFullLayer instead of kFull; - Clear RasterInvalidator old states which are stale 2. Track implicit full composited layer invalidation (Pre-SPv2 and SPv2) which happens when a layer is newly created or becomes non empty. We don't issue raster invaidation because the new tiles are invalid initially. However, it's a performance overhead when we unnecessarily re-create a composited layer e.g. just because the layer's id changed (crbug.com/842356), and we need to expose this overhead in layout test results. Bug: 842356 Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_slimming_paint_v2;master.tryserver.blink:linux_trusty_blink_rel Change-Id: I2ffcfa9dbc43668f57b0ea84795d3b0fbcb7b9c6 Reviewed-on: https://chromium-review.googlesource.com/1112300 Reviewed-by: Chris Harrelson <chrishtr@chromium.org> Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org> Cr-Commit-Position: refs/heads/master@{#569855} [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/compositing/squashing/squash-above-fixed-1-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/flag-specific/enable-slimming-paint-v2/paint/invalidation/filters/filter-invalidation-with-composited-container-change-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/flag-specific/enable-slimming-paint-v2/paint/invalidation/table/composited-table-background-composited-row-initial-empty-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/flag-specific/enable-slimming-paint-v2/paint/invalidation/table/composited-table-background-section-composited-row-initial-empty-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/flag-specific/enable-slimming-paint-v2/paint/invalidation/table/composited-table-background-section-initial-empty-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/compositing/invalidate-when-leaving-squashed-layer-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/compositing/new-stacking-context-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/compositing/pointer-events-composited-scrolling-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/compositing/scrolling-without-painting-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/compositing/should-invoke-deferred-compositing-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/compositing/should-not-clip-composited-overflow-scrolling-layer-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/compositing/should-not-repaint-composited-descendants-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/compositing/updating-scrolling-content-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/filters/filter-invalidation-with-composited-container-change-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/overflow/overflow-changed-on-child-of-composited-layer-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/scroll/composited-add-resizer-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/scroll/destroy-composited-scrollbar-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/scroll/flipped-blocks-writing-mode-scroll-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/scroll/invalidate-after-composited-scroll-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/scroll/overflow-move-after-scroll-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/paint/invalidation/scroll/overflow-scroll-after-move-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/platform/linux/paint/invalidation/scroll/invalidate-caret-in-composited-scrolling-container-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/platform/linux/paint/invalidation/scroll/invalidate-caret-in-non-composited-scrolling-container-expected.txt [delete] https://crrev.com/900f41068a78bc344295af674596847b6e50c0ce/third_party/WebKit/LayoutTests/platform/mac-mac10.10/paint/invalidation/scroll/invalidate-caret-in-composited-scrolling-container-expected.txt [delete] https://crrev.com/900f41068a78bc344295af674596847b6e50c0ce/third_party/WebKit/LayoutTests/platform/mac-mac10.10/paint/invalidation/scroll/invalidate-caret-in-non-composited-scrolling-container-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/platform/mac/paint/invalidation/scroll/invalidate-caret-in-composited-scrolling-container-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/platform/mac/paint/invalidation/scroll/invalidate-caret-in-non-composited-scrolling-container-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/platform/mac/paint/invalidation/scroll/overflow-scroll-local-background-text-color-change-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/platform/mac/paint/invalidation/svg/transform-focus-ring-repaint-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/platform/win/paint/invalidation/scroll/invalidate-caret-in-composited-scrolling-container-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/platform/win/paint/invalidation/scroll/invalidate-caret-in-non-composited-scrolling-container-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/WebKit/LayoutTests/platform/win/paint/invalidation/scroll/overflow-scroll-local-background-text-color-change-expected.txt [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/blink/renderer/core/paint/link_highlight_impl.cc [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/blink/renderer/platform/graphics/graphics_layer.cc [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/blink/renderer/platform/graphics/paint/raster_invalidator.cc [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/blink/renderer/platform/graphics/paint/raster_invalidator.h [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/blink/renderer/platform/graphics/paint/raster_invalidator_test.cc [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/blink/renderer/platform/graphics/paint_invalidation_reason.cc [modify] https://crrev.com/44ab27047d914c47ac888a5daa0977703750767f/third_party/blink/renderer/platform/graphics/paint_invalidation_reason.h
Comment 1 by bugdroid1@chromium.org
, May 17 2018