Subject: Re: ipsec impact on performance

From: David Ahern <[email-masked]>
Date: Tue, 1 Dec 2015 17:25:21 -0800

On 12/1/15 5:09 PM, Sowmini Varadhan wrote:
> The not-so-great news is that I see that just adding perf tracepoints
> (not even enabling them!) seems to make a small diff (3 Gbps vs 3.2 Gbps)
> to my numbers. Is that mere standard-deviation, or something
> one should be aware of, about perf?

existence of traepoints has no overhead until activated (ie., launch 
perf or start ftrace for those tracepoints).