src: reduce cpu profiler overhead

bnoordhuis · trevnorris · commit 1eb1e0a9af9b · 2014-12-17T12:37:30.000-08:00
Reduce the overhead of the CPU profiler by suppressing SIGPROF signals when sleeping / polling for events. Avoids unnecessary wakeups when the CPU profiler is active. Depends on https://github.com/libuv/libuv#15. Ref: strongloop/strong-agent#3 PR-URL: #8791 Reviewed-by: Trevor Norris <trev.norris@gmail.com>
diff --git a/src/node.cc b/src/node.cc
@@ -2962,6 +2962,7 @@ char** Init(int argc, char *argv[]) {
   V8::SetFlagsFromCommandLine(&v8argc, v8argv, false);
 
 #ifdef __POSIX__
+  uv_loop_configure(uv_default_loop(), UV_LOOP_BLOCK_SIGNAL, SIGPROF);
   // Ignore SIGPIPE
   RegisterSignalHandler(SIGPIPE, SIG_IGN);
   RegisterSignalHandler(SIGINT, SignalExit);
