From ac129fe548b2224bc22ae9eae54815cde44a4f31 Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Thu, 27 Nov 2014 09:10:21 +0100
Subject: [PATCH] src: reduce cpu profiler overhead

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 libuv/libuv#15.

Refs strongloop/strong-agent#3 and strongloop-internal/scrum-cs#37.
---
 src/node.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/node.cc b/src/node.cc
index e80c1a573f50..6d4d212bfb72 100644
--- 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);