From 1eb1e0a9af9b5f0782f4b877f6e50247e0276ba1 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 https://github.com/libuv/libuv#15.

Ref: https://github.com/strongloop/strong-agent/issues/3
PR-URL: https://github.com/joyent/node/pull/8791
Reviewed-by: Trevor Norris <trev.norris@gmail.com>
---
 src/node.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/node.cc b/src/node.cc
index e80c1a573f..6d4d212bfb 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);