diff options
Diffstat (limited to 'src/runtime/runtime2.go')
| -rw-r--r-- | src/runtime/runtime2.go | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/runtime/runtime2.go b/src/runtime/runtime2.go index f84cb51bad..7fc7174334 100644 --- a/src/runtime/runtime2.go +++ b/src/runtime/runtime2.go @@ -462,6 +462,10 @@ type g struct { raceignore int8 // ignore race detection events sysblocktraced bool // StartTrace has emitted EvGoInSyscall about this goroutine + tracking bool // whether we're tracking this G for sched latency statistics + trackingSeq uint8 // used to decide whether to track this G + runnableStamp int64 // timestamp of when the G last became runnable, only used when tracking + runnableTime int64 // the amount of time spent runnable, cleared when running, only used when tracking sysexitticks int64 // cputicks when syscall has returned (for tracing) traceseq uint64 // trace event sequencer tracelastp puintptr // last P emitted an event for this goroutine @@ -493,6 +497,10 @@ type g struct { gcAssistBytes int64 } +// gTrackingPeriod is the number of transitions out of _Grunning between +// latency tracking runs. +const gTrackingPeriod = 8 + const ( // tlsSlots is the number of pointer-sized slots reserved for TLS on some platforms, // like Windows. @@ -824,6 +832,15 @@ type schedt struct { // Acquire and hold this mutex to block sysmon from interacting // with the rest of the runtime. sysmonlock mutex + + _ uint32 // ensure timeToRun has 8-byte alignment + + // timeToRun is a distribution of scheduling latencies, defined + // as the sum of time a G spends in the _Grunnable state before + // it transitions to _Grunning. + // + // timeToRun is protected by sched.lock. + timeToRun timeHistogram } // Values for the flags field of a sigTabT. |