[Impeller] use 3 fences to synchronize AHB swapchains (like we do for KHR). #161767

jonahwilliams · 2025-01-16T18:56:15Z

Testing on a newer Adreno, I can still see rendering artifacts. This change matches the syncrhonization to what we do for KHR, and on the Adreno I see no more rendering artifacts.

… KHR).

flutter-dashboard · 2025-01-16T18:56:18Z

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jonahwilliams · 2025-01-16T19:24:24Z

The reason for having both the signal semaphore in fence is that there is a difference between completion of command buffer execution and the memory visibility of the input attachment. Not necessariyl on all devices of course, but it matches KHR so seems reasonable.

chinmaygarde

All nits.

chinmaygarde · 2025-01-16T19:34:07Z

engine/src/flutter/impeller/renderer/backend/vulkan/swapchain/ahb/external_semaphore_vk.h

 ///             on the implementation.
 ///
-class ExternalFenceVK {
+class ExternalSemaphoreVK {


The docs above are outdated.

chinmaygarde · 2025-01-16T19:36:53Z

engine/src/flutter/impeller/renderer/backend/vulkan/swapchain/ahb/ahb_swapchain_impl_vk.h


+static constexpr const size_t kMaxPendingPresents = 2u;
+
+struct AHBFrameSynchronizerVK {


Can we just use the same synchronizer util (with some mods if necessary) for both KHR and ABH? The KHR synchronizer was just an implementation detail and I don't think I did a great job documenting it.

There is different behavior in how/when we initialize the semaphores, specifically the external ones. I'd like to keep the swapchains as separate as possible until I know this one actually works in prod...

chinmaygarde · 2025-01-16T19:38:06Z

engine/src/flutter/impeller/renderer/backend/vulkan/swapchain/ahb/ahb_swapchain_impl_vk.cc

  is_valid_ = control && control->IsValid();
+
+  for (auto i = 0u; i < kMaxPendingPresents; i++) {
+    frame_data_.push_back(std::make_unique<AHBFrameSynchronizerVK>(


Let's add some error checking here? Perhaps a validity checks for all the handles.

…e do for KHR). (flutter/flutter#161767)

flutter/flutter@5517cc9...b9e86a5 2025-01-18 737941+loic-sharma@users.noreply.github.com Fix link to Linux custom embedder artifacts (flutter/flutter#161699) 2025-01-18 matanlurey@users.noreply.github.com Remove tests, GLFW examples, and non-artifact builds from `linux_host_engine`. (flutter/flutter#161786) 2025-01-18 jonahwilliams@google.com [Impeller] when mips are disabled, also disable from sampler options. (flutter/flutter#161765) 2025-01-18 lukepighetti@gmail.com revert removing Twitter, retain BlueSky (flutter/flutter#161803) 2025-01-17 yjbanov@google.com fix reorderable_list_test.dart (flutter/flutter#161836) 2025-01-17 kevinjchisholm@google.com [Release] Update the cherry-pick process. (flutter/flutter#161771) 2025-01-17 victorsanniay@gmail.com Reland "#143249 Autocomplete options width" (flutter/flutter#161695) 2025-01-17 a-siva@users.noreply.github.com Roll Dart to Version 3.8.0-1.0.dev (flutter/flutter#161781) 2025-01-17 jonahwilliams@google.com [Impeller] use 3 fences to synchronize AHB swapchains (like we do for KHR). (flutter/flutter#161767) 2025-01-17 jonahwilliams@google.com [Impeller] remove Adreno denylist entries. (flutter/flutter#161740) 2025-01-17 robert.ancell@canonical.com Refactor event redispatching (flutter/flutter#161701) 2025-01-17 jonahwilliams@google.com [Impellerc] correctly pad arrays of vec3s in reflector. (flutter/flutter#161697) 2025-01-17 jason-simmons@users.noreply.github.com Initialize dartLoader.rootDirectories so the Web stack trace mapper can convert package source paths (flutter/flutter#160383) 2025-01-16 robert.ancell@canonical.com Make fl_keyboard_manager_handle_event async (flutter/flutter#161637) 2025-01-16 kevmoo@users.noreply.github.com Update social links in readme (flutter/flutter#161778) 2025-01-16 robert.ancell@canonical.com Remove some stray printf debugging (flutter/flutter#161706) 2025-01-16 58529443+srujzs@users.noreply.github.com Set meta tag in default index (flutter/flutter#161493) 2025-01-16 andrewrkolos@gmail.com remove usage of `Usage` from build system (flutter/flutter#160663) 2025-01-16 andrewrkolos@gmail.com route CLI command usage information through the logger instead of using `print` (flutter/flutter#161533) 2025-01-16 matanlurey@users.noreply.github.com Enable duplicate `linux_host_engine_test`. (flutter/flutter#161613) 2025-01-16 58190796+MitchellGoodwin@users.noreply.github.com Do not block vertical drag gestures in CupertinoSheetRoute body (flutter/flutter#161696) 2025-01-16 jonahwilliams@google.com [Impeller] Update partial repaint to use a fullsize onscreen. (flutter/flutter#161626) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC stuartmorgan@google.com on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

… KHR). (flutter#161767) Testing on a newer Adreno, I can still see rendering artifacts. This change matches the syncrhonization to what we do for KHR, and on the Adreno I see no more rendering artifacts.

…e do for KHR). (flutter/flutter#161767)

flutter/flutter@5517cc9...b9e86a5 2025-01-18 737941+loic-sharma@users.noreply.github.com Fix link to Linux custom embedder artifacts (flutter/flutter#161699) 2025-01-18 matanlurey@users.noreply.github.com Remove tests, GLFW examples, and non-artifact builds from `linux_host_engine`. (flutter/flutter#161786) 2025-01-18 jonahwilliams@google.com [Impeller] when mips are disabled, also disable from sampler options. (flutter/flutter#161765) 2025-01-18 lukepighetti@gmail.com revert removing Twitter, retain BlueSky (flutter/flutter#161803) 2025-01-17 yjbanov@google.com fix reorderable_list_test.dart (flutter/flutter#161836) 2025-01-17 kevinjchisholm@google.com [Release] Update the cherry-pick process. (flutter/flutter#161771) 2025-01-17 victorsanniay@gmail.com Reland "#143249 Autocomplete options width" (flutter/flutter#161695) 2025-01-17 a-siva@users.noreply.github.com Roll Dart to Version 3.8.0-1.0.dev (flutter/flutter#161781) 2025-01-17 jonahwilliams@google.com [Impeller] use 3 fences to synchronize AHB swapchains (like we do for KHR). (flutter/flutter#161767) 2025-01-17 jonahwilliams@google.com [Impeller] remove Adreno denylist entries. (flutter/flutter#161740) 2025-01-17 robert.ancell@canonical.com Refactor event redispatching (flutter/flutter#161701) 2025-01-17 jonahwilliams@google.com [Impellerc] correctly pad arrays of vec3s in reflector. (flutter/flutter#161697) 2025-01-17 jason-simmons@users.noreply.github.com Initialize dartLoader.rootDirectories so the Web stack trace mapper can convert package source paths (flutter/flutter#160383) 2025-01-16 robert.ancell@canonical.com Make fl_keyboard_manager_handle_event async (flutter/flutter#161637) 2025-01-16 kevmoo@users.noreply.github.com Update social links in readme (flutter/flutter#161778) 2025-01-16 robert.ancell@canonical.com Remove some stray printf debugging (flutter/flutter#161706) 2025-01-16 58529443+srujzs@users.noreply.github.com Set meta tag in default index (flutter/flutter#161493) 2025-01-16 andrewrkolos@gmail.com remove usage of `Usage` from build system (flutter/flutter#160663) 2025-01-16 andrewrkolos@gmail.com route CLI command usage information through the logger instead of using `print` (flutter/flutter#161533) 2025-01-16 matanlurey@users.noreply.github.com Enable duplicate `linux_host_engine_test`. (flutter/flutter#161613) 2025-01-16 58190796+MitchellGoodwin@users.noreply.github.com Do not block vertical drag gestures in CupertinoSheetRoute body (flutter/flutter#161696) 2025-01-16 jonahwilliams@google.com [Impeller] Update partial repaint to use a fullsize onscreen. (flutter/flutter#161626) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC stuartmorgan@google.com on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

[Impeller] use 3 fences to synchronize AHB swapchains (like we do for…

3c780ad

… KHR).

github-actions bot added engine flutter/engine related. See also e: labels. e: impeller Impeller rendering backend issues and features requests labels Jan 16, 2025

Cleanups and renames.

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jonahwilliams requested a review from chinmaygarde January 16, 2025 19:07

chinmaygarde approved these changes Jan 16, 2025

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jonahwilliams added 2 commits January 16, 2025 12:14

docs update and validity check.

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Update licenses.

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Merge branch 'master' into really-fix-ahb-swapchain

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		static constexpr const size_t kMaxPendingPresents = 2u;

		struct AHBFrameSynchronizerVK {

[Impeller] use 3 fences to synchronize AHB swapchains (like we do for KHR). #161767

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