From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Theodore Tso <tytso@mit.edu>,
Greg KH <gregkh@linuxfoundation.org>,
Jean-Philippe Aumasson <jeanphilippe.aumasson@gmail.com>
Subject: Re: [PATCH v2 2/2] random: use BLAKE2s instead of SHA1 in extraction
Date: Tue, 11 Jan 2022 14:00:44 +0100 [thread overview]
Message-ID: <CAHmME9pvGoPCL=KBJGa-3vZTY1Afshk0ccfGiL-zFVNHh1CjPA@mail.gmail.com> (raw)
In-Reply-To: <CAMuHMdVJSAe_uQ0yzBL9gkzhW+8Po81Eh332NFENMHCUqbw-dQ@mail.gmail.com>
On Tue, Jan 11, 2022 at 1:58 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> Cool, much more than 1000 bytes:
>
> add/remove: 1/0 grow/shrink: 0/1 up/down: 160/-4032 (-3872)
> Function old new delta
> blake2s_sigma - 160 +160
> blake2s_compress_generic 4448 416 -4032
> Total: Before=4227876, After=4224004, chg -0.09%
>
> I don't know what the impact is on performance, and if the compiler
> might do a good job unrolling this again when performance matters
> (i.e. if CONFIG_CC_OPTIMIZE_FOR_SIZE is not set).
Oh, wow, that's a lot indeed.
I guess the new code could be ifdef'd in a CONFIG_CC_OPTIMIZE_FOR_SIZE block?
next prev parent reply other threads:[~2022-01-11 13:01 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-23 14:11 [PATCH v2 1/2] lib/crypto: blake2s: include as built-in Jason A. Donenfeld
2021-12-23 14:11 ` [PATCH v2 2/2] random: use BLAKE2s instead of SHA1 in extraction Jason A. Donenfeld
2021-12-24 20:56 ` Eric Biggers
2022-01-05 21:42 ` Eric Biggers
2021-12-27 15:52 ` Theodore Ts'o
2022-01-11 11:38 ` Geert Uytterhoeven
2022-01-11 12:28 ` Jason A. Donenfeld
2022-01-11 12:50 ` Jason A. Donenfeld
2022-01-11 12:57 ` Geert Uytterhoeven
2022-01-11 13:00 ` Jason A. Donenfeld [this message]
2022-01-11 15:46 ` David Laight
2022-01-11 18:26 ` Jason A. Donenfeld
2022-01-14 17:27 ` David Laight
2022-01-14 17:31 ` Jason A. Donenfeld
2022-01-11 12:51 ` Geert Uytterhoeven
2022-01-11 13:02 ` Jason A. Donenfeld
2022-01-11 13:49 ` [PATCH crypto 0/2] smaller blake2s code size on m68k and other small platforms Jason A. Donenfeld
2022-01-11 13:49 ` [PATCH crypto 1/2] lib/crypto: blake2s-generic: reduce code size on small systems Jason A. Donenfeld
2022-01-12 10:57 ` Geert Uytterhoeven
2022-01-12 13:16 ` Jason A. Donenfeld
2022-01-12 18:31 ` Eric Biggers
2022-01-12 18:50 ` Jason A. Donenfeld
2022-01-12 21:27 ` David Laight
2022-01-12 22:00 ` Jason A. Donenfeld
2022-01-11 13:49 ` [PATCH crypto 2/2] lib/crypto: blake2s: move hmac construction into wireguard Jason A. Donenfeld
2022-01-11 14:43 ` Ard Biesheuvel
2022-01-12 18:35 ` Eric Biggers
2022-01-11 18:10 ` [PATCH crypto v2 0/2] reduce code size from blake2s on m68k and other small platforms Jason A. Donenfeld
2022-01-11 18:10 ` [PATCH crypto v2 1/2] lib/crypto: blake2s: move hmac construction into wireguard Jason A. Donenfeld
2022-01-11 18:10 ` [PATCH crypto v2 2/2] lib/crypto: sha1: re-roll loops to reduce code size Jason A. Donenfeld
2022-01-11 22:05 ` [PATCH crypto v3 0/2] reduce code size from blake2s on m68k and other small platforms Jason A. Donenfeld
2022-01-11 22:05 ` [PATCH crypto v3 1/2] lib/crypto: blake2s: move hmac construction into wireguard Jason A. Donenfeld
2022-01-11 22:05 ` [PATCH crypto v3 2/2] lib/crypto: sha1: re-roll loops to reduce code size Jason A. Donenfeld
2022-01-12 10:59 ` [PATCH crypto v3 0/2] reduce code size from blake2s on m68k and other small platforms Geert Uytterhoeven
2022-01-12 13:18 ` Jason A. Donenfeld
2022-01-18 6:42 ` Herbert Xu
2022-01-18 11:43 ` Jason A. Donenfeld
2022-01-18 12:44 ` David Laight
2022-01-18 12:50 ` Jason A. Donenfeld
2021-12-23 14:20 ` [PATCH v2 1/2] lib/crypto: blake2s: include as built-in Ard Biesheuvel
2021-12-24 13:35 ` Greg KH
2021-12-25 9:26 ` Masahiro Yamada
2021-12-25 10:26 ` Ard Biesheuvel
2021-12-25 15:47 ` Masahiro Yamada
2021-12-27 13:43 ` Jason A. Donenfeld
2021-12-27 13:47 ` [PATCH v3] " Jason A. Donenfeld
2021-12-27 14:20 ` [PATCH v4] " Jason A. Donenfeld
2022-01-01 15:59 ` [PATCH v5] " Jason A. Donenfeld
2022-01-02 20:42 ` [PATCH v6] " Jason A. Donenfeld
2022-01-03 3:23 ` Herbert Xu
2022-01-03 3:45 ` Jason A. Donenfeld
2022-01-03 4:06 ` Herbert Xu
2022-01-03 11:57 ` Jason A. Donenfeld
2022-01-03 12:31 ` [PATCH v7] " Jason A. Donenfeld
2022-01-04 1:21 ` Herbert Xu
2022-01-04 17:02 ` Ard Biesheuvel
2022-01-04 17:04 ` Jason A. Donenfeld
2022-01-05 0:28 ` Herbert Xu
2022-01-05 21:53 ` Eric Biggers
2022-01-05 22:01 ` Ard Biesheuvel
2022-01-05 22:09 ` Eric Biggers
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