[pa] Use adaptive-spin and data-sync on macos

Those features give us better kernel scheduling support in case of
contention. When I switch the v8 side over I see up to 90% reduction
of stall time:

https://chromeperf.appspot.com/report?sid=3d6c6608c114bf32f3168f045992e8c1ff6ef5025cf064ca9846383e7d0195a6&start_rev=97803&end_rev=97900

Bug: 384940357
Change-Id: Iab423cd7b62fe53334bf75fdc056e0cb9e9643a0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6110502
Reviewed-by: Benoit Lize <lizeb@chromium.org>
Commit-Queue: Benoit Lize <lizeb@chromium.org>
Auto-Submit: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1402471}
NOKEYCHECK=True
GitOrigin-RevId: a89d77d4a62bc1a76a12b8b0ed39082e97ce04fa
1 file changed