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Merge pull request #45357 from tklauser/sched-getaffinity-pid-zero

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pkg/sysinfo: omit Getpid call in numCPU
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Sebastiaan van Stijn 2023-04-25 11:21:30 +02:00 • committed by GitHub
commit 599a258421
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1 changed files with 2 additions and 8 deletions
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10
pkg/sysinfo/numcpu_linux.go
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@ -1,23 +1,17 @@
package sysinfo // import "github.com/docker/docker/pkg/sysinfo"
import (
"golang.org/x/sys/unix"
)
import "golang.org/x/sys/unix"
// numCPU queries the system for the count of threads available
// for use to this process.
//
// Issues two syscalls.
// Returns 0 on errors. Use |runtime.NumCPU| in that case.
func numCPU() int {
// Gets the affinity mask for a process: The very one invoking this function.
pid := unix.Getpid()
var mask unix.CPUSet
err := unix.SchedGetaffinity(pid, &mask)
err := unix.SchedGetaffinity(0, &mask)
if err != nil {
return 0
}
return mask.Count()
}