Return a meaningful message when a profile is empty.
Also rename "IO blocking" to "Network blocking",
currently only network blocking is captured.
Fixes #11098
Change-Id: Ib6f1292b8ade4805756fcb6696ba1fca8f9f39a9
Reviewed-on: https://go-review.googlesource.com/11243
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
<body>
<a href="/trace">View trace</a><br>
<a href="/goroutines">Goroutine analysis</a><br>
-<a href="/io">IO blocking profile</a><br>
+<a href="/io">Network blocking profile</a><br>
<a href="/block">Synchronization blocking profile</a><br>
<a href="/syscall">Syscall blocking profile</a><br>
<a href="/sched">Scheduler latency profile</a><br>
// generateSVGProfile generates pprof-like profile stored in prof and writes in to w.
func serveSVGProfile(w http.ResponseWriter, r *http.Request, prof map[uint64]Record) {
+ if len(prof) == 0 {
+ http.Error(w, "The profile is empty", http.StatusNotFound)
+ return
+ }
blockf, err := ioutil.TempFile("", "block")
if err != nil {
http.Error(w, fmt.Sprintf("failed to create temp file: %v", err), http.StatusInternalServerError)