From: Henry Chang <henry@bigtera.com>
Date: Thu, 23 Apr 2015 02:38:27 +0000 (+0800)
Subject: Throttle: reset max only if max changed
X-Git-Tag: v9.0.1~81^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=refs%2Fpull%2F4444%2Fhead;p=ceph.git

Throttle: reset max only if max changed

Save some CPU cycles.

Signed-off-by: Henry Chang <henry@bigtera.com>
---

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)