250a9610a4
Currently, GC captures the start-the-world time stamp after startTheWorldWithSema returns. This is problematic for two reasons: 1. It's possible to get preempted between startTheWorldWithSema starting the world and calling nanotime. 2. startTheWorldWithSema does several clean-up tasks after the world is up and running that on rare occasions can take upwards of 10ms. Since the runtime uses the start-the-world time stamp to compute the STW duration, both of these can significantly inflate the reported STW duration. Fix this by having startTheWorldWithSema itself call nanotime once the world is started. Change-Id: I114630234fb73c9dabae50a2ef1884661f2459db Reviewed-on: https://go-review.googlesource.com/55410 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rick Hudson <rlh@golang.org> |
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