38 lines
633 B
Go
38 lines
633 B
Go
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package sync
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import (
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"sort"
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"sync"
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"github.com/anacrolix/missinggo/perf"
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)
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var (
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// Stats on lock usage by call graph.
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lockStatsMu sync.Mutex
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lockStatsByStack map[lockStackKey]lockStats
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)
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type (
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lockStats = perf.Event
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lockStackKey = [32]uintptr
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lockCount = int64
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)
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type stackLockStats struct {
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stack lockStackKey
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lockStats
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}
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func sortedLockTimes() (ret []stackLockStats) {
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lockStatsMu.Lock()
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for stack, stats := range lockStatsByStack {
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ret = append(ret, stackLockStats{stack, stats})
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}
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lockStatsMu.Unlock()
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sort.Slice(ret, func(i, j int) bool {
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return ret[i].Total > ret[j].Total
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})
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return
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}
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