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From: Eric Biggers <ebiggers3@gmail.com>
To: Ingo Molnar <mingo@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>,
	x86@kernel.org, linux-kernel@vger.kernel.org,
	Tim Chen <tim.c.chen@linux.intel.com>,
	Mathias Krause <minipli@googlemail.com>,
	Chandramouli Narayanan <mouli@linux.intel.com>,
	Jussi Kivilinna <jussi.kivilinna@iki.fi>,
	Peter Zijlstra <peterz@infradead.org>,
	Herbert Xu <herbert@gondor.apana.org.au>,
	"David S. Miller" <davem@davemloft.net>,
	linux-crypto@vger.kernel.org, Eric Biggers <ebiggers@google.com>,
	Andy Lutomirski <luto@kernel.org>, Jiri Slaby <jslaby@suse.cz>
Subject: Re: [PATCH 00/12] x86/crypto: Fix RBP usage in several crypto .S files
Date: Fri, 8 Sep 2017 10:57:05 -0700	[thread overview]
Message-ID: <20170908175705.GA623@zzz.localdomain> (raw)
In-Reply-To: <20170907212646.q3y5wmhyaaqblg5m@gmail.com>

On Thu, Sep 07, 2017 at 11:26:47PM +0200, Ingo Molnar wrote:
> 
> * Eric Biggers <ebiggers3@gmail.com> wrote:
> 
> > On Thu, Sep 07, 2017 at 09:15:34AM +0200, Ingo Molnar wrote:
> > > 
> > > * Eric Biggers <ebiggers3@gmail.com> wrote:
> > > 
> > > > Thanks for fixing these!  I don't have time to review these in detail, but I ran
> > > > the crypto self-tests on the affected algorithms, and they all pass.  I also
> > > > benchmarked them before and after; the only noticable performance difference was
> > > > that sha256-avx2 and sha512-avx2 became a few percent slower.  I don't suppose
> > > > there is a way around that?  Otherwise it's probably not a big deal.
> > > 
> > > Which CPU model did you use for the test?
> > > 
> > > Thanks,
> > > 
> > > 	Ingo
> > 
> > This was on Haswell, "Intel(R) Xeon(R) CPU E5-1650 v3 @ 3.50GHz".
> 
> Any chance to test this with the latest microarchitecture - any Skylake derivative 
> Intel CPU you have access to?
> 
> Thanks,
> 
> 	Ingo

Tested with Skylake, "Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz".  The results
were the following which seemed a bit worse than Haswell:

	sha256-avx2 became 3.5% slower
	sha512-avx2 became 7.5% slower

Note: it's tricky to benchmark this, especially with just a few percent
difference, so don't read too much into the exact numbers.

Eric

  reply	other threads:[~2017-09-08 17:57 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-29 18:05 [PATCH 00/12] x86/crypto: Fix RBP usage in several crypto .S files Josh Poimboeuf
2017-08-29 18:05 ` [PATCH 01/12] x86/crypto: Fix RBP usage in blowfish-x86_64-asm_64.S Josh Poimboeuf
2017-08-29 18:05 ` [PATCH 02/12] x86/crypto: Fix RBP usage in camellia-x86_64-asm_64.S Josh Poimboeuf
2017-08-29 18:05 ` [PATCH 03/12] x86/crypto: Fix RBP usage in cast5-avx-x86_64-asm_64.S Josh Poimboeuf
2017-08-29 18:05 ` [PATCH 04/12] x86/crypto: Fix RBP usage in cast6-avx-x86_64-asm_64.S Josh Poimboeuf
2017-08-29 18:05 ` [PATCH 05/12] x86/crypto: Fix RBP usage in des3_ede-asm_64.S Josh Poimboeuf
2017-08-29 18:05 ` [PATCH 06/12] x86/crypto: Fix RBP usage in sha1_avx2_x86_64_asm.S Josh Poimboeuf
2017-09-06 16:11   ` Tim Chen
2017-08-29 18:05 ` [PATCH 07/12] x86/crypto: Fix RBP usage in sha1_ssse3_asm.S Josh Poimboeuf
2017-08-29 18:05 ` [PATCH 08/12] x86/crypto: Fix RBP usage in sha256-avx-asm.S Josh Poimboeuf
2017-08-29 18:05 ` [PATCH 09/12] x86/crypto: Fix RBP usage in sha256-avx2-asm.S Josh Poimboeuf
2017-08-29 18:05 ` [PATCH 10/12] x86/crypto: Fix RBP usage in sha256-ssse3-asm.S Josh Poimboeuf
2017-08-29 18:05 ` [PATCH 11/12] x86/crypto: Fix RBP usage in sha512-avx2-asm.S Josh Poimboeuf
2017-08-29 18:05 ` [PATCH 12/12] x86/crypto: Fix RBP usage in twofish-avx-x86_64-asm_64.S Josh Poimboeuf
2017-09-02  0:09 ` [PATCH 00/12] x86/crypto: Fix RBP usage in several crypto .S files Eric Biggers
2017-09-07  0:15   ` Josh Poimboeuf
2017-09-07  7:15   ` Ingo Molnar
2017-09-07 17:58     ` Eric Biggers
2017-09-07 21:26       ` Ingo Molnar
2017-09-08 17:57         ` Eric Biggers [this message]
2017-09-13 21:24           ` Josh Poimboeuf
2017-09-13 22:33             ` Josh Poimboeuf
2017-09-15  4:54               ` Eric Biggers
2017-09-15  5:34                 ` Ingo Molnar
2017-09-15 16:07                   ` Eric Biggers
2017-09-15 21:06                     ` Ingo Molnar
2017-09-19  3:00                       ` Herbert Xu
2017-09-14  9:16             ` Ingo Molnar
2017-09-14  9:28               ` Ingo Molnar
2017-09-14 13:28               ` Josh Poimboeuf
2017-09-15  5:37                 ` Ingo Molnar

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