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runtime: convert schedt.ngsys to atomic type
Note that this converts ngsys from uint32 to int32 to match the other (non-atomic) counters. For #53821. Change-Id: I3acbfbbd1dabc59b0ea5ddc86a97e0d0afa9f80c Reviewed-on: https://go-review.googlesource.com/c/go/+/419444 Run-TryBot: Michael Pratt <mpratt@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Austin Clements <austin@google.com>
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@ -1868,7 +1868,7 @@ func needm() {
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// mp.curg is now a real goroutine.
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casgstatus(mp.curg, _Gdead, _Gsyscall)
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atomic.Xadd(&sched.ngsys, -1)
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sched.ngsys.Add(-1)
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}
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var earlycgocallback = []byte("fatal error: cgo callback before cgo call\n")
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@ -1930,7 +1930,7 @@ func oneNewExtraM() {
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// counted by gcount. It would be more "proper" to increment
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// sched.ngfree, but that requires locking. Incrementing ngsys
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// has the same effect.
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atomic.Xadd(&sched.ngsys, +1)
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sched.ngsys.Add(1)
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// Add m to the extra list.
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mnext := lockextra(true)
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@ -1971,7 +1971,7 @@ func dropm() {
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// Return mp.curg to dead state.
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casgstatus(mp.curg, _Gsyscall, _Gdead)
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mp.curg.preemptStop = false
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atomic.Xadd(&sched.ngsys, +1)
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sched.ngsys.Add(1)
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// Block signals before unminit.
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// Unminit unregisters the signal handling stack (but needs g on some systems).
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@ -3474,7 +3474,7 @@ func goexit0(gp *g) {
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casgstatus(gp, _Grunning, _Gdead)
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gcController.addScannableStack(pp, -int64(gp.stack.hi-gp.stack.lo))
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if isSystemGoroutine(gp, false) {
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atomic.Xadd(&sched.ngsys, -1)
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sched.ngsys.Add(-1)
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}
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gp.m = nil
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locked := gp.lockedm != 0
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@ -4141,7 +4141,7 @@ func newproc1(fn *funcval, callergp *g, callerpc uintptr) *g {
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newg.ancestors = saveAncestors(callergp)
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newg.startpc = fn.fn
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if isSystemGoroutine(newg, false) {
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atomic.Xadd(&sched.ngsys, +1)
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sched.ngsys.Add(1)
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} else {
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// Only user goroutines inherit pprof labels.
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if mp.curg != nil {
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@ -4462,7 +4462,7 @@ func badunlockosthread() {
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}
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func gcount() int32 {
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n := int32(atomic.Loaduintptr(&allglen)) - sched.gFree.n - int32(atomic.Load(&sched.ngsys))
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n := int32(atomic.Loaduintptr(&allglen)) - sched.gFree.n - sched.ngsys.Load()
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for _, pp := range allp {
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n -= pp.gFree.n
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}
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@ -775,7 +775,7 @@ type schedt struct {
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nmsys int32 // number of system m's not counted for deadlock
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nmfreed int64 // cumulative number of freed m's
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ngsys uint32 // number of system goroutines; updated atomically
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ngsys atomic.Int32 // number of system goroutines
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pidle puintptr // idle p's
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npidle uint32
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