From 92574ab8f61c87215ab9651e7772dba225e2d873 Mon Sep 17 00:00:00 2001
From: Henry Chang <henry@bigtera.com>
Date: Thu, 23 Apr 2015 10:38:27 +0800
Subject: [PATCH] Throttle: reset max only if max changed

Save some CPU cycles.

Signed-off-by: Henry Chang <henry@bigtera.com>
---
 src/common/Throttle.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/common/Throttle.cc b/src/common/Throttle.cc
index f0dd91d4db9e..ce7666904e17 100644
--- a/src/common/Throttle.cc
+++ b/src/common/Throttle.cc
@@ -80,6 +80,8 @@ Throttle::~Throttle()
 void Throttle::_reset_max(int64_t m)
 {
   assert(lock.is_locked());
+  if ((int64_t)max.read() == m)
+    return;
   if (!cond.empty())
     cond.front()->SignalOne();
   if (logger)
-- 
2.47.3