• Clemens Backes's avatar
    [counters] Make all counters thread-safe · f0c982b8
    Clemens Backes authored
    D8 shares counters across isolates, so even if they are only updated
    from the main thread, they need to be thread-safe.
    This CL removes the distinction between {StatsCounter} and
    {StatsCounterThreadSafe}, and just makes all {StatsCounter} use (cheap)
    atomic operations for counter updates. This will make previously
    thread-safe counters cheaper, because no Mutex is involved. It might
    make previously not-thread-safe counters slightly more expensive, but
    it's not expected to be a significant regression.
    
    R=mlippautz@chromium.org
    
    Bug: v8:12481, v8:12482
    Change-Id: I47b8681c1cf26d142e1ccfafa0c192e3fdcb7d2a
    Cq-Include-Trybots: luci.v8.try:v8_linux64_tsan_rel_ng
    Cq-Include-Trybots: luci.v8.try:v8_linux64_ubsan_rel_ng
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3320427Reviewed-by: 's avatarMichael Lippautz <mlippautz@chromium.org>
    Commit-Queue: Clemens Backes <clemensb@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#78278}
    f0c982b8
counters-definitions.h 27.4 KB