From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: edumazet@google.com, davem@davemloft.net, brouer@redhat.com
Cc: netdev@vger.kernel.org
Subject: Measurable performance improvements from RCU_INIT_POINTER()?
Date: Sat, 19 Jul 2014 01:12:40 -0700 [thread overview]
Message-ID: <20140719081240.GA13806@linux.vnet.ibm.com> (raw)
Hello!
Did the replacement of selected calls to rcu_assign_pointer() by
RCU_INIT_POINTER() in the networking stack result in measurable
system-level performance improvements?
The reason I ask is that some of the compiler guys on the C and C++
standards committees are suggesting changes that would add barriers
in some cases. I suspect that this is a very bad idea, and was hoping
that you guys would have some hard numbers on the system-level effects
of barriers. ;-)
Thanx, Paul
reply other threads:[~2014-07-19 17:42 UTC|newest]
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