Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 20eaa761a17cddfa7df1a0db999d84f9eff35bff
https://github.com/WebKit/WebKit/commit/20eaa761a17cddfa7df1a0db999d84f9eff35bff
Author: Mike Wyrzykowski <mwyrzykow...@apple.com>
Date: 2025-08-18 (Mon, 18 Aug 2025)
Changed paths:
M Source/WebGPU/WebGPU/HardwareCapabilities.mm
Log Message:
-----------
[WebGPU] iOS often reports 256MB max buffer size
https://bugs.webkit.org/show_bug.cgi?id=297475
rdar://158431698
Reviewed by Tadeu Zagallo.
As encountered on WebLLM and also reported on some other
AI / ML developers, WebGPU reporting a max buffer size of 1/10th
the device's true maximum buffer size is too limiting.
iPhone 16 Pro for instance can report a 4GB max buffer size from
Metal, so WebGPU would report 400MB.
Instead, allow up to 1 GB buffers on iOS as the jetsam limit is
still 1.5GB on iOS, so reporting any larger is going to result
in the web process getting instantly terminated due to memory pressure.
After this change, iPhone 16 Pro reports 1GB buffer size.
* Source/WebGPU/WebGPU/HardwareCapabilities.mm:
(WebGPU::maxBufferSize):
Canonical link: https://commits.webkit.org/298851@main
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