Operational Remediation Reports
Mutex Guard Remediation Report
Turn the number of waiters behind a held guard into an enter, backoff, or page remediation action.
guard contention
The waiter count behind a held guard is kept as a scalar, so the remediation action stays deterministic and never depends on scheduler timing or lock identity.
Mutex Guard Remediation Report
mutex_guard_remediation_report.go
Replay: real traced execution (multi-file project)
package main
import "fmt"
func main() {
var waiters = 0
guardLimit := 2
acquired := 1
var action string
if waiters == 0 {
action = "enter"
} else if waiters <= guardLimit {
action = "backoff"
} else {
action = "page"
}
fmt.Printf("waiters=%d acquired=%d %s\n", waiters, acquired, action)
}
package main
import "fmt"
func main() {
var waiters = 1
guardLimit := 2
acquired := 1
var action string
if waiters == 0 {
action = "enter"
} else if waiters <= guardLimit {
action = "backoff"
} else {
action = "page"
}
fmt.Printf("waiters=%d acquired=%d %s\n", waiters, acquired, action)
}
package main
import "fmt"
func main() {
var waiters = 3
guardLimit := 2
acquired := 1
var action string
if waiters == 0 {
action = "enter"
} else if waiters <= guardLimit {
action = "backoff"
} else {
action = "page"
}
fmt.Printf("waiters=%d acquired=%d %s\n", waiters, acquired, action)
}
waiters ← 0, guardLimit ← 2, acquired ← 1, action ← ""
5func main() {6 var waiters→ 0 = 0 //@waiters=1, 37 guardLimit→ 2 := 28 acquired→ 1 := 19 var action→ "" string10 if waiters == 0 {action ← "enter"
9var action string10if waiters0 == 0 {11 action→ "enter" = "enter"12} else if waiters <= guardLimit {fmt.Printf("waiters=%d acquired=%d %s ", waiters, acquired, action)
16 }17 fmt.Printf("waiters=%d acquired=%d %s\n", waiters0, acquired1, action"enter")18}outputwaiters=0 acquired=1 enter
waiters ← 1, guardLimit ← 2, acquired ← 1, action ← ""
5func main() {6 var waiters→ 1 = 17 guardLimit→ 2 := 28 acquired→ 1 := 19 var action→ "" string10 if waiters == 0 {action ← "backoff"
11 action = "enter"12} else if waiters1 <= guardLimit2 {13 action→ "backoff" = "backoff"14} else {fmt.Printf("waiters=%d acquired=%d %s ", waiters, acquired, action)
16 }17 fmt.Printf("waiters=%d acquired=%d %s\n", waiters1, acquired1, action"backoff")18}outputwaiters=1 acquired=1 backoff
waiters ← 3, guardLimit ← 2, acquired ← 1, action ← ""
5func main() {6 var waiters→ 3 = 37 guardLimit→ 2 := 28 acquired→ 1 := 19 var action→ "" string10 if waiters == 0 {action ← "page"
13 action = "backoff"14} else {15 action→ "page" = "page"16}fmt.Printf("waiters=%d acquired=%d %s ", waiters, acquired, action)
16 }17 fmt.Printf("waiters=%d acquired=%d %s\n", waiters3, acquired1, action"page")18}outputwaiters=3 acquired=1 page