[macos] prefer integrated GPU. #164569

jonahwilliams · 2025-03-04T19:13:52Z

Attempted fix for #163218

There are very few macOS devices with multiple GPUs and they were only brielfy sold. We seem to have a problem o the specific devices when choosing the dedicated GPU. INstead, lets try forcing the integrated GPU when its available.

loic-sharma · 2025-03-04T19:22:55Z

Not sure if you're aware, but on Windows we recently added an API so that users can set a GPU preference. If you add an API, ideally it should mirror the Windows API: #162490

knopp · 2025-03-04T19:23:53Z

Not sure if you're aware, but on Windows we recently added an API so that users can set a GPU preference. If you add an API, ideally it should mirror the Windows API: #162490

Yeah, the issue is that right now it crashes with the dedicated one :)

jonahwilliams · 2025-03-04T19:24:59Z

@loic-sharma I think if they were still making macbooks with multiple GPUs we'd probably support via enum like with windows, but support for multiple GPUs was removed with the arm mac so it seems like a dead end.

loic-sharma · 2025-03-04T19:25:46Z

Sounds good!

knopp

LGTM!

gaaclarke

The code looks fine to me. I'm still fuzzy on the premise. We want this because we've written the code to require unified memory and all integrated graphics cards we care about have unified memory? I'm not sure if that's going to be the case.

knopp · 2025-03-04T20:25:01Z

engine/src/flutter/shell/platform/darwin/macos/framework/Source/FlutterRenderer.mm

+id<MTLDevice> SelectMetalDevice() {
+  NSArray<id<MTLDevice>>* devices = MTLCopyAllDevices();
+  for (id<MTLDevice> device in devices) {
+    if (!device.isRemovable && device.isLowPower) {


Shouldn't we use hasUnifiedMemory perhaps?

jonahwilliams · 2025-03-04T20:28:34Z

We don't actually need unified memory AFAIK. I can run on a much older macbook (2015) which I think doesn't have unified memory and it works fine 🤷

jonahwilliams · 2025-03-04T20:45:34Z

Let me double check on my 2015 Mac to see if it has unified memory.

jonahwilliams · 2025-03-05T00:57:21Z

Okay so looks like the 2015 macbook also has unified memory. So the crash seems to be specific to using GPUs without unified memory, which means a bug when using Shared memory types. I think as long as it works, its probably what we should prefer.

gaaclarke · 2025-03-05T16:21:04Z

So the crash seems to be specific to using GPUs without unified memory

Yay, glad to have gotten to the bottom of that. That was the most plausible explanation. It makes sense too since we have no test coverage from discrete gpus.

We should get this fixed since there are probably some android devices that don't have unified memory, like TVs, streaming boxes and cars.

flutter/flutter@2578d97...321fbc0 2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from fefecd49e03a to ccd8cc23aa94 (1 revision) (flutter/flutter#164712) 2025-03-06 mdebbar@google.com [web] Detect scrollable semantics nodes more reliably (flutter/flutter#164491) 2025-03-06 matt.kosarek@canonical.com [windows] wire the focus request and the focus events through the Windows platform (flutter/flutter#164296) 2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from 02897747c7d5 to fefecd49e03a (1 revision) (flutter/flutter#164701) 2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from e315b0ab7c84 to 02897747c7d5 (1 revision) (flutter/flutter#164677) 2025-03-06 engine-flutter-autoroll@skia.org Roll Skia from 0c3880f94970 to e315b0ab7c84 (1 revision) (flutter/flutter#164669) 2025-03-06 jonahwilliams@google.com [Impeller] use device private on non-iOS devices. (flutter/flutter#164601) 2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 43294a662fd0 to 0c3880f94970 (1 revision) (flutter/flutter#164661) 2025-03-05 codefu@google.com Add a workflow (only triggered from rest events) for hasing experiment (flutter/flutter#164657) 2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 4cf9f0b77d41 to 43294a662fd0 (4 revisions) (flutter/flutter#164649) 2025-03-05 50643541+Mairramer@users.noreply.github.com Adds animateToItem to the CarouselController (flutter/flutter#162694) 2025-03-05 30870216+gaaclarke@users.noreply.github.com Cleanup content context (flutter/flutter#164229) 2025-03-05 34465683+rkishan516@users.noreply.github.com Fix: Update CupertinoSheetRoute transition rounded corner (flutter/flutter#163700) 2025-03-05 jonahwilliams@google.com [Impeller] fix macOS managed memory. (flutter/flutter#164635) 2025-03-05 jacksongardner@google.com [skwasm] Clear font collection cache when font is loaded manually. (flutter/flutter#164588) 2025-03-05 victorsanniay@gmail.com Fix race condition causing crash when interacting with an animating scrollable (flutter/flutter#164392) 2025-03-05 58529443+srujzs@users.noreply.github.com Use dwds 24.3.6 and pass uri for the reload scripts path to FrontendServerDdcLibraryBundleProvider (flutter/flutter#164582) 2025-03-05 engine-flutter-autoroll@skia.org Roll Packages from 9e4684e to abba683 (8 revisions) (flutter/flutter#164630) 2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 7e4323f72c9d to 4cf9f0b77d41 (1 revision) (flutter/flutter#164622) 2025-03-05 harri.kirik@lab.mobi Fix to Linux_pixel_7pro integration_ui_keyboard_resize test flakiness (flutter/flutter#162308) 2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 03a3f653d64e to 7e4323f72c9d (1 revision) (flutter/flutter#164599) 2025-03-05 34871572+gmackall@users.noreply.github.com Implement `clipPath` Mutator for hcpp (flutter/flutter#164525) 2025-03-05 98614782+auto-submit[bot]@users.noreply.github.com Reverts "[Impeller] use DeviceLocal textures for gifs on non-iOS devices. (#164573)" (flutter/flutter#164600) 2025-03-05 jonahwilliams@google.com [macos] prefer integrated GPU. (flutter/flutter#164569) 2025-03-05 muhatashim@google.com Enforce minSdk constraint for Android Flutter (flutter/flutter#164251) 2025-03-05 dkwingsmt@users.noreply.github.com Add `clipRSuperellipse`, and use them for dialogs (flutter/flutter#161111) 2025-03-05 engine-flutter-autoroll@skia.org Roll Skia from 46705a22edc3 to 03a3f653d64e (1 revision) (flutter/flutter#164590) 2025-03-05 psturm@esri.com when resetting FlutterPlatformViewsController, clear out some additional internal state to prevent it from carrying over across a Hot Restart (flutter/flutter#164456) 2025-03-05 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from Rt6pxGFLVAJHduM0V... to fhm5z889sA5T1AQao... (flutter/flutter#164583) 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,tarrinneal@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

jonahwilliams added 2 commits March 4, 2025 11:10

[macos] prefer integrated GPU.

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++

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github-actions bot added engine flutter/engine related. See also e: labels. a: desktop Running on desktop platform-macos labels Mar 4, 2025

jonahwilliams requested review from gaaclarke and knopp March 4, 2025 19:22

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Update FlutterRenderer.mm

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App crashes on macOS with Impeller enabled when using external GPU. #163218

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[macos] prefer integrated GPU. #164569

[macos] prefer integrated GPU. #164569

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