• Clemens Backes's avatar
    [wasm] Grow number of compilation queues dynamically · 0af542c8
    Clemens Backes authored
    Instead of querying the platform for the number of available threads,
    and allocating exactly N+1 queues, do grow the number of queues
    dynamically. This allows for more than N+1 concurrent threads,
    which then allows us to contribute to compilation instead of waiting
    doing nothing. This will be added in a follow-up CL.
    
    Special care is being taken to not synchronize too much between threads.
    We take a shared mutex whenever stealing tasks, but not on the default
    path where we pick a unit from the task's own queue.
    
    R=thibaudm@chromium.org
    CC=​etiennep@chromium.org
    
    Bug: v8:11005
    Change-Id: I1f67f15fb22b95ef246c37eb80c03132d8a1d149
    Cq-Include-Trybots: luci.v8.try:v8_linux64_tsan_rel_ng
    Cq-Include-Trybots: luci.v8.try:v8_linux64_tsan_isolates_rel_ng
    Cq-Include-Trybots: luci.v8.try:v8_linux_gc_stress_dbg_ng
    Cq-Include-Trybots: luci.v8.try:v8_mac64_gc_stress_dbg_ng
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2467844
    Commit-Queue: Clemens Backes <clemensb@chromium.org>
    Reviewed-by: 's avatarThibaud Michaud <thibaudm@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#70508}
    0af542c8
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