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cmd/containerd-shim: set GOMAXPROCS to 2

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The shim doesn't need massive concurrency and a bunch of CPUs to do its
job correctly. We can reduce the number of threads to save memory at
little cost to performance.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
This commit is contained in:
Stephen J Day 2017-11-22 15:58:32 -08:00
parent 8e09b565a7
commit 5764bf1bad
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1 changed files with 7 additions and 0 deletions
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7
cmd/containerd-shim/main_unix.go
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@ -60,6 +60,13 @@ func main() {
if debugFlag { if debugFlag {
logrus.SetLevel(logrus.DebugLevel) logrus.SetLevel(logrus.DebugLevel)
} }
if os.Getenv("GOMAXPROCS") == "" {
// If GOMAXPROCS hasn't been set, we default to a value of 2 to reduce
// the number of Go stacks present in the shim.
runtime.GOMAXPROCS(2)
}
if err := executeShim(); err != nil { if err := executeShim(); err != nil {
fmt.Fprintf(os.Stderr, "containerd-shim: %s\n", err) fmt.Fprintf(os.Stderr, "containerd-shim: %s\n", err)
os.Exit(1) os.Exit(1)