diff options
Diffstat (limited to 'src/runtime/mprof.go')
| -rw-r--r-- | src/runtime/mprof.go | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/runtime/mprof.go b/src/runtime/mprof.go index b51a1ad3ce..b97fac787e 100644 --- a/src/runtime/mprof.go +++ b/src/runtime/mprof.go @@ -667,6 +667,17 @@ func (lt *lockTimer) end() { } } +// mWaitList is part of the M struct, and holds the list of Ms that are waiting +// for a particular runtime.mutex. +// +// When an M is unable to immediately obtain a lock, it adds itself to the list +// of Ms waiting for the lock. It does that via this struct's next field, +// forming a singly-linked list with the mutex's key field pointing to the head +// of the list. +type mWaitList struct { + next muintptr // next m waiting for lock (set by us, cleared by another during unlock) +} + type mLockProfile struct { waitTime atomic.Int64 // total nanoseconds spent waiting in runtime.lockWithRank stack []uintptr // stack that experienced contention in runtime.lockWithRank |