X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/b2b6c8a9ac127ba76dc0421782503e4574837f4d..0348478eba20e59c3305dd5eda702d9192b45058:/lib/mount/command.go

diff --git a/lib/mount/command.go b/lib/mount/command.go
index da3f97b467..e92af24075 100644
--- a/lib/mount/command.go
+++ b/lib/mount/command.go
@@ -8,6 +8,9 @@ import (
 	"flag"
 	"io"
 	"log"
+	"net/http"
+	// pprof is only imported to register its HTTP handlers
+	_ "net/http/pprof"
 	"os"
 
 	"git.arvados.org/arvados.git/sdk/go/arvados"
@@ -24,7 +27,7 @@ type cmd struct {
 	// not be called more than once, or when ready is already
 	// closed.
 	ready chan struct{}
-	// It is safe to call Unmount ounly after ready has been
+	// It is safe to call Unmount only after ready has been
 	// closed.
 	Unmount func() (ok bool)
 }
@@ -39,6 +42,7 @@ func (c *cmd) RunCommand(prog string, args []string, stdin io.Reader, stdout, st
 	ro := flags.Bool("ro", false, "read-only")
 	experimental := flags.Bool("experimental", false, "acknowledge this is an experimental command, and should not be used in production (required)")
 	blockCache := flags.Int("block-cache", 4, "read cache size (number of 64MiB blocks)")
+	pprof := flags.String("pprof", "", "serve Go profile data at `[addr]:port`")
 	err := flags.Parse(args)
 	if err != nil {
 		logger.Print(err)
@@ -48,6 +52,11 @@ func (c *cmd) RunCommand(prog string, args []string, stdin io.Reader, stdout, st
 		logger.Printf("error: experimental command %q used without --experimental flag", prog)
 		return 2
 	}
+	if *pprof != "" {
+		go func() {
+			log.Println(http.ListenAndServe(*pprof, nil))
+		}()
+	}
 
 	client := arvados.NewClientFromEnv()
 	ac, err := arvadosclient.New(client)