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-rw-r--r--main.go46
-rw-r--r--profiling.go95
2 files changed, 101 insertions, 40 deletions
diff --git a/main.go b/main.go
index 13514c1..c4d35b4 100644
--- a/main.go
+++ b/main.go
@@ -3,11 +3,8 @@ package main
import (
"fmt"
"os"
-
"path/filepath"
"runtime"
- "runtime/pprof"
- "runtime/trace"
"strconv"
"strings"
"time"
@@ -208,49 +205,18 @@ func main() {
}
// "-cpuprofile"
if args.cpuprofile != "" {
- tlog.Info.Printf("Writing CPU profile to %s", args.cpuprofile)
- var f *os.File
- f, err = os.Create(args.cpuprofile)
- if err != nil {
- tlog.Fatal.Println(err)
- os.Exit(exitcodes.Profiler)
- }
- err = pprof.StartCPUProfile(f)
- if err != nil {
- tlog.Fatal.Println(err)
- os.Exit(exitcodes.Profiler)
- }
- defer pprof.StopCPUProfile()
+ onExitFunc := setupCpuprofile(args.cpuprofile)
+ defer onExitFunc()
}
// "-memprofile"
if args.memprofile != "" {
- tlog.Info.Printf("Writing mem profile to %s", args.memprofile)
- var f *os.File
- f, err = os.Create(args.memprofile)
- if err != nil {
- tlog.Fatal.Println(err)
- os.Exit(exitcodes.Profiler)
- }
- defer func() {
- pprof.WriteHeapProfile(f)
- f.Close()
- return
- }()
+ onExitFunc := setupMemprofile(args.memprofile)
+ defer onExitFunc()
}
// "-trace"
if args.trace != "" {
- tlog.Info.Printf("Writing execution trace to %s", args.trace)
- f, err := os.Create(args.trace)
- if err != nil {
- tlog.Fatal.Println(err)
- os.Exit(exitcodes.Profiler)
- }
- err = trace.Start(f)
- if err != nil {
- tlog.Fatal.Println(err)
- os.Exit(exitcodes.Profiler)
- }
- defer trace.Stop()
+ onExitFunc := setupTrace(args.trace)
+ defer onExitFunc()
}
if args.cpuprofile != "" || args.memprofile != "" || args.trace != "" {
tlog.Info.Printf("Note: You must unmount gracefully, otherwise the profile file(s) will stay empty!\n")
diff --git a/profiling.go b/profiling.go
new file mode 100644
index 0000000..11d6326
--- /dev/null
+++ b/profiling.go
@@ -0,0 +1,95 @@
+package main
+
+import (
+ "os"
+ "runtime/pprof"
+ "runtime/trace"
+ "time"
+
+ "github.com/rfjakob/gocryptfs/internal/exitcodes"
+ "github.com/rfjakob/gocryptfs/internal/tlog"
+)
+
+// setupCpuprofile is called to handle a non-empty "-cpuprofile" cli argument
+func setupCpuprofile(cpuprofileArg string) func() {
+ tlog.Info.Printf("Writing CPU profile to %s", cpuprofileArg)
+ f, err := os.Create(cpuprofileArg)
+ if err != nil {
+ tlog.Fatal.Println(err)
+ os.Exit(exitcodes.Profiler)
+ }
+ err = pprof.StartCPUProfile(f)
+ if err != nil {
+ tlog.Fatal.Println(err)
+ os.Exit(exitcodes.Profiler)
+ }
+ return func() {
+ pprof.StopCPUProfile()
+ }
+}
+
+// setupTrace is called to handle a non-empty "-memprofile" cli argument
+func setupMemprofile(memprofileArg string) func() {
+ tlog.Info.Printf("Will write memory profile to %q", memprofileArg)
+ f, err := os.Create(memprofileArg)
+ if err != nil {
+ tlog.Fatal.Println(err)
+ os.Exit(exitcodes.Profiler)
+ }
+ exiting := false
+ // Write the memory profile to disk every 60 seconds to get the in-use
+ // memory stats.
+ go func() {
+ for {
+ time.Sleep(60 * time.Second)
+ if exiting {
+ return
+ }
+ _, err = f.Seek(0, 0)
+ if err != nil {
+ tlog.Warn.Printf("memprofile: Seek failed: %v", err)
+ return
+ }
+ err = f.Truncate(0)
+ if err != nil {
+ tlog.Warn.Printf("memprofile: Truncate failed: %v", err)
+ return
+ }
+ err = pprof.WriteHeapProfile(f)
+ if err == nil {
+ tlog.Info.Printf("memprofile: periodic write to %q succeeded",
+ memprofileArg)
+ } else {
+ tlog.Warn.Printf("memprofile: periodic WriteHeapProfile failed: %v", err)
+ return
+ }
+ }
+ }()
+ // Final write on exit.
+ return func() {
+ exiting = true
+ err = pprof.WriteHeapProfile(f)
+ if err != nil {
+ tlog.Warn.Printf("memprofile: on-exit WriteHeapProfile failed: %v", err)
+ }
+ f.Close()
+ }
+}
+
+// setupTrace is called to handle a non-empty "-trace" cli argument
+func setupTrace(traceArg string) func() {
+ tlog.Info.Printf("Writing execution trace to %s", traceArg)
+ f, err := os.Create(traceArg)
+ if err != nil {
+ tlog.Fatal.Println(err)
+ os.Exit(exitcodes.Profiler)
+ }
+ err = trace.Start(f)
+ if err != nil {
+ tlog.Fatal.Println(err)
+ os.Exit(exitcodes.Profiler)
+ }
+ return func() {
+ trace.Stop()
+ }
+}