| commit | cfe3cd903f018dec3cb5997d53b1744df4e53909 | [log] [tgz] |
|---|---|---|
| author | Ian Lance Taylor <iant@golang.org> | Mon Jan 13 12:17:26 2020 -0800 |
| committer | Ian Lance Taylor <iant@golang.org> | Tue Jan 14 19:54:20 2020 +0000 |
| tree | e685f5fa8ca0df1bd74b2c2a634a3b70dc276deb | |
| parent | 71154e061f067a668e7b619d7b3701470b8561be [diff] |
runtime: keep P's first timer when in new atomically accessed field This reduces lock contention when only a few P's are running and checking for whether they need to run timers on the sleeping P's. Without this change the running P's would get lock contention while looking at the sleeping P's timers. With this change a single atomic load suffices to determine whether there are any ready timers. Change-Id: Ie843782bd56df49867a01ecf19c47498ec827452 Reviewed-on: https://go-review.googlesource.com/c/go/+/214185 Run-TryBot: Ian Lance Taylor <iant@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com> Reviewed-by: David Chase <drchase@google.com>
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