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/goPublic

Commitceeda72

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[release-branch.go1.1] runtime: prevent sysmon from polling network excessivly
««« CL 11569043 / 6b3c351c7fe6runtime: prevent sysmon from polling network excessivlyIf the network is not polled for 10ms, sysmon starts polling networkon every iteration (every 20us) until another thread blocks in netpoll.Fixes issue 5922 .R=golang-dev, iantCC=golang-devhttps://golang.org/cl/11569043»»»Update#5928R=golang-dev, bradfitzCC=golang-devhttps://golang.org/cl/11438044
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‎src/pkg/runtime/proc.c‎

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Original file line numberDiff line numberDiff line change
@@ -2015,6 +2015,7 @@ sysmon(void)
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lastpoll=runtime·atomicload64(&runtime·sched.lastpoll);
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now=runtime·nanotime();
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if(lastpoll!=0&&lastpoll+10*1000*1000>now) {
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runtime·cas64(&runtime·sched.lastpoll,lastpoll,now);
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gp=runtime·netpoll(false);// non-blocking
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injectglist(gp);
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}

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