refacotr: move signal handling and pprof to grace package

weed/util/grace/pprof.go

@@ -0,0 +1,34 @@
+package grace
+
+import (
+	"os"
+	"runtime"
+	"runtime/pprof"
+
+	"github.com/chrislusf/seaweedfs/weed/glog"
+)
+
+func SetupProfiling(cpuProfile, memProfile string) {
+	if cpuProfile != "" {
+		f, err := os.Create(cpuProfile)
+		if err != nil {
+			glog.Fatal(err)
+		}
+		pprof.StartCPUProfile(f)
+		OnInterrupt(func() {
+			pprof.StopCPUProfile()
+		})
+	}
+	if memProfile != "" {
+		runtime.MemProfileRate = 1
+		f, err := os.Create(memProfile)
+		if err != nil {
+			glog.Fatal(err)
+		}
+		OnInterrupt(func() {
+			pprof.WriteHeapProfile(f)
+			f.Close()
+		})
+	}
+
+}