linux-kernel - Re: [PATCH 07/17] net: convert sock.sk_refcnt from atomic_t to refcount

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Message-ID: <20170320132713.GA26954@gondor.apana.org.au>
Date:   Mon, 20 Mar 2017 21:27:13 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     David Miller <davem@...emloft.net>, eric.dumazet@...il.com,
        elena.reshetova@...el.com, keescook@...omium.org,
        netdev@...r.kernel.org, bridge@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, kuznet@....inr.ac.ru,
        jmorris@...ei.org, kaber@...sh.net, stephen@...workplumber.org,
        ishkamiel@...il.com, dwindsor@...il.com, akpm@...ux-foundation.org
Subject: Re: [PATCH 07/17] net: convert sock.sk_refcnt from atomic_t to
 refcount_t

On Mon, Mar 20, 2017 at 02:23:57PM +0100, Peter Zijlstra wrote:
>
> So what bench/setup do you want ran?

You can start by counting how many cycles an atomic op takes
vs. how many cycles this new code takes.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt