From e93f84e28f0da4ce7aa21d714f0504677f4bf6f6 Mon Sep 17 00:00:00 2001
From: Eric Wong <normalperson@yhbt.net>
Date: Fri, 24 Apr 2009 01:21:31 -0700
Subject: Avoid getppid() if serving heavy traffic

As long as our speculative accept()s are succeeding, then avoid
checking for master process death and keep processing requests.
This allows us to save some syscalls under extremely heavy
traffic spikes.
---
 lib/unicorn.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/unicorn.rb b/lib/unicorn.rb
index c2ac09d..a049b5c 100644
--- a/lib/unicorn.rb
+++ b/lib/unicorn.rb
@@ -471,7 +471,7 @@ module Unicorn
       [:TERM, :INT].each { |sig| trap(sig) { exit(0) } } # instant shutdown
       @logger.info "worker=#{worker.nr} ready"
 
-      while alive && master_pid == Process.ppid
+      while alive
         if nr < 0
           @logger.info "worker=#{worker.nr} reopening logs..."
           Unicorn::Util.reopen_logs
@@ -517,6 +517,7 @@ module Unicorn
           if nr != 0 # (nr < 0) => reopen logs
             ready = LISTENERS
           else
+            master_pid == Process.ppid or exit(0)
             begin
               alive.chmod(nr += 1)
               # timeout used so we can detect parent death:
-- 
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