Commit 941b3df3df32a06a4b8a01c41c5522e2ea859d04
2024-08-21T17:23:16
Vulkan: Add new threshold for CPU buffer subdata Currently, with preferCPUForBufferSubData enabled, when the GPU is busy, we use the CPU to copy subdata, which includes duplicating the buffer. If the buffer is large, this can cause performance regression. To avoid this, we should avoid using the CPU in cases that can lead to such regressions. * Enabled preferCPUForBufferSubData for all ARM devices. * This feature is only used in the following cases: * If the buffer is smaller than than 32K; or * If the copy size is greater than 1/8 of the total buffer size. * Significant performance improvement observed in several traces. Bug: b/360118138 Change-Id: Ibc8e3de9b4e081c69457c85facba893283c8fb38 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5824347 Reviewed-by: Charlie Lao <cclao@google.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Amirali Abdolrashidi <abdolrashidi@google.com>