lib/connections: Add KCP support (fixes #804)

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3489

test/usage_unix.go

@@ -0,0 +1,30 @@
+// Copyright (C) 2014 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// +build integration,benchmark,!windows
+
+package integration
+
+import (
+	"log"
+	"os"
+	"runtime"
+	"syscall"
+	"time"
+)
+
+func printUsage(name string, proc *os.ProcessState) {
+	if rusage, ok := proc.SysUsage().(*syscall.Rusage); ok {
+		log.Printf("%s: Utime: %s", name, time.Duration(rusage.Utime.Nano()))
+		log.Printf("%s: Stime: %s", name, time.Duration(rusage.Stime.Nano()))
+		if runtime.GOOS == "darwin" {
+			// Darwin reports in bytes, Linux seems to report in KiB even
+			// though the manpage says otherwise.
+			rusage.Maxrss /= 1024
+		}
+		log.Printf("%s: MaxRSS: %d KiB", name, rusage.Maxrss)
+	}
+}