From: Eric Biggers <ebiggers@kernel.org>
To: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
Linux Crypto Mailing List <linux-crypto@vger.kernel.org>,
David Sterba <dsterba@suse.com>, Ard Biesheuvel <ardb@kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
Paul Crowley <paulcrowley@google.com>
Subject: Re: [PATCH 0/5] crypto: add NEON-optimized BLAKE2b
Date: Wed, 16 Dec 2020 19:54:18 -0800 [thread overview]
Message-ID: <X9rWatnoHtF/7gBU@sol.localdomain> (raw)
In-Reply-To: <CAHmME9qj+D8opq6pnoMd4vsOsTYaL9Ntxk0HvskAiPvXFev75A@mail.gmail.com>
On Wed, Dec 16, 2020 at 11:32:44PM +0100, Jason A. Donenfeld wrote:
> Hi Eric,
>
> On Wed, Dec 16, 2020 at 9:48 PM Eric Biggers <ebiggers@kernel.org> wrote:
> > By the way, if people are interested in having my ARM scalar implementation of
> > BLAKE2s in the kernel too, I can send a patchset for that too. It just ended up
> > being slower than BLAKE2b and SHA-1, so it wasn't as good for the use case
> > mentioned above. If it were to be added as "blake2s-256-arm", we'd have:
>
> I'd certainly be interested in this. Any rough idea how it performs
> for pretty small messages compared to the generic implementation?
> 100-140 byte ranges? Is the speedup about the same as for longer
> messages because this doesn't parallelize across multiple blocks?
>
It does one block at a time, and there isn't much overhead, so yes the speedup
on short messages should be about the same as on long messages.
I did a couple quick userspace benchmarks and got (still on Cortex-A7):
100-byte messages:
BLAKE2s ARM: 28.9 cpb
BLAKE2s generic: 42.4 cpb
140-byte messages:
BLAKE2s ARM: 29.5 cpb
BLAKE2s generic: 44.0 cpb
The results in the kernel may differ a bit, but probably not by much.
- Eric
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next prev parent reply other threads:[~2020-12-17 3:55 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-15 23:47 [PATCH 0/5] crypto: add NEON-optimized BLAKE2b Eric Biggers
2020-12-15 23:47 ` [PATCH 1/5] crypto: blake2b - rename constants for consistency with blake2s Eric Biggers
2020-12-17 17:13 ` David Sterba
2020-12-15 23:47 ` [PATCH 2/5] crypto: blake2b - define shash_alg structs using macros Eric Biggers
2020-12-17 17:15 ` David Sterba
2020-12-17 18:35 ` Eric Biggers
2020-12-15 23:47 ` [PATCH 3/5] crypto: blake2b - export helpers for optimized implementations Eric Biggers
2020-12-17 17:15 ` David Sterba
2020-12-17 22:33 ` Eric Biggers
2020-12-15 23:47 ` [PATCH 4/5] crypto: blake2b - update file comment Eric Biggers
2020-12-17 17:17 ` David Sterba
2020-12-15 23:47 ` [PATCH 5/5] crypto: arm/blake2b - add NEON-optimized BLAKE2b implementation Eric Biggers
2020-12-16 20:57 ` Eric Biggers
2020-12-16 20:47 ` [PATCH 0/5] crypto: add NEON-optimized BLAKE2b Eric Biggers
2020-12-16 22:32 ` Jason A. Donenfeld
2020-12-17 3:54 ` Eric Biggers [this message]
2020-12-17 14:01 ` Jason A. Donenfeld
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