From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-crypto-owner@kernel.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
	aws-us-west-2-korg-lkml-1.web.codeaurora.org
X-Spam-Level: 
X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00,
	HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,
	USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0
Received: from mail.kernel.org (mail.kernel.org [198.145.29.99])
	by smtp.lore.kernel.org (Postfix) with ESMTP id BF6F3C2BB9A
	for <linux-crypto@archiver.kernel.org>; Tue, 15 Dec 2020 09:20:13 +0000 (UTC)
Received: from vger.kernel.org (vger.kernel.org [23.128.96.18])
	by mail.kernel.org (Postfix) with ESMTP id 759B422258
	for <linux-crypto@archiver.kernel.org>; Tue, 15 Dec 2020 09:20:13 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1727967AbgLOJT6 (ORCPT
        <rfc822;linux-crypto@archiver.kernel.org>);
        Tue, 15 Dec 2020 04:19:58 -0500
Received: from helcar.hmeau.com ([216.24.177.18]:50836 "EHLO fornost.hmeau.com"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1727543AbgLOJTx (ORCPT <rfc822;linux-crypto@vger.kernel.org>);
        Tue, 15 Dec 2020 04:19:53 -0500
Received: from gwarestrin.arnor.me.apana.org.au ([192.168.0.7])
        by fornost.hmeau.com with smtp (Exim 4.92 #5 (Debian))
        id 1kp6U2-0002Pr-Sk; Tue, 15 Dec 2020 20:19:04 +1100
Received: by gwarestrin.arnor.me.apana.org.au (sSMTP sendmail emulation); Tue, 15 Dec 2020 20:19:02 +1100
Date:   Tue, 15 Dec 2020 20:19:02 +1100
From:   Herbert Xu <herbert@gondor.apana.org.au>
To:     Ard Biesheuvel <ardb@kernel.org>
Cc:     Ben Greear <greearb@candelatech.com>,
        Linux Crypto Mailing List <linux-crypto@vger.kernel.org>,
        Eric Biggers <ebiggers@kernel.org>
Subject: Re: [PATCH v2] crypto: aesni - add ccm(aes) algorithm implementation
Message-ID: <20201215091902.GA21455@gondor.apana.org.au>
References: <20201201231158.GA32274@gondor.apana.org.au>
 <CAMj1kXHwD5ktJTUrh8sndMY7P0kSFhgkGT66YJN1-ONUaU05-g@mail.gmail.com>
 <20201210024342.GA26428@gondor.apana.org.au>
 <e02fe07e-8cb6-f889-3228-60e4fabf4e40@candelatech.com>
 <CAMj1kXF05XZtyakdpLixpP9Lroy0D3_gEcY2SFbSshD8ERUU7w@mail.gmail.com>
 <20201210111427.GA28014@gondor.apana.org.au>
 <CAMj1kXG39GgsTeNBbX7_oaK+f-awPyL8NxJ7R+fyOBjL4c5xMw@mail.gmail.com>
 <20201210121627.GB28441@gondor.apana.org.au>
 <CAMj1kXE-+35tfO87024xB274ZVOu7HTHqDa8o-hjoxDasd8p7g@mail.gmail.com>
 <CAMj1kXH5LPib2vPgLkdzHX4gSawDSE=ij451s106_xTuT19YmA@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAMj1kXH5LPib2vPgLkdzHX4gSawDSE=ij451s106_xTuT19YmA@mail.gmail.com>
User-Agent: Mutt/1.10.1 (2018-07-13)
Precedence: bulk
List-ID: <linux-crypto.vger.kernel.org>
X-Mailing-List: linux-crypto@vger.kernel.org

On Tue, Dec 15, 2020 at 09:55:37AM +0100, Ard Biesheuvel wrote:
>
> So the question is then how granular these kernel mode SIMD regions
> need to be to avoid excessive latencies in softirq handling.

Can you get some real world numbers on what the latency is like?

Then we could take it to the scheduler folks and see if they're
OK with it.

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