From: Isaac Dunham <idunham@lavabit.com>
To: musl@lists.openwall.com
Subject: Re: crypt* files in crypt directory
Date: Wed, 8 Aug 2012 16:08:10 -0700 [thread overview]
Message-ID: <20120808160810.731cec78@newbook> (raw)
In-Reply-To: <20120808214855.GL27715@brightrain.aerifal.cx>
On Wed, 8 Aug 2012 17:48:55 -0400
Rich Felker <dalias@aerifal.cx> wrote:
> > > Maybe you could support -DFAST_CRYPT or the like. It could enable
> > > forced inlining and manual unrolls in crypt_blowfish.c.
..
> Unless there's a really compelling reason to do so, I'd like to avoid
> having multiple alternative versions of the same code in a codebase.
> It makes it so there's more combinations you have to test to be sure
> the code works and doesn't have regressions.
>
> As it stands, the code I posted with the manual unrolling removed
> performs _better_ than the manually unrolled code with gcc 4 on x86_64
> when optimized for speed, and it's 33% smaller when optimized for
> size.
Per your own tests?
I say this because the test previously mentioned shows the
opposite:
> > The impact on x86-64 is less. With Ubuntu 12.04's gcc 4.6.3 on
> > FX-8120 I get 490 c/s for the original code, 450 c/s for your code
> > without inlining/unrolling, and somehow only 430 c/s with
> > -finline-functions -funroll-loops.
that's :
Raw %speed version
490 c/s 100% original
450 c/s 92% rich's version
430 c/s 88% rich's version, unrolled by compiler
Higher is faster.
IE, unrolling is actually slowing your version down more.
GCC 3/x86 is getting 80% with rich's version, optimized.
Also, how much "bloat" does solar designer's proposal (unroll inside
BF_body) add?
Isaac Dunham
next prev parent reply other threads:[~2012-08-08 23:08 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-21 15:23 Łukasz Sowa
2012-07-21 17:11 ` Solar Designer
2012-07-21 20:17 ` Rich Felker
2012-07-22 16:23 ` Łukasz Sowa
2012-07-25 7:57 ` Rich Felker
2012-08-08 2:24 ` Rich Felker
2012-08-08 4:42 ` Solar Designer
2012-08-08 5:28 ` Rich Felker
2012-08-08 6:27 ` Solar Designer
2012-08-08 7:03 ` Daniel Cegiełka
2012-08-08 7:24 ` Solar Designer
2012-08-08 7:42 ` Daniel Cegiełka
2012-08-08 21:48 ` Rich Felker
2012-08-08 23:08 ` Isaac Dunham [this message]
2012-08-08 23:24 ` John Spencer
2012-08-09 1:03 ` Isaac Dunham
2012-08-09 3:16 ` Rich Felker
2012-08-09 3:36 ` Solar Designer
2012-08-09 7:13 ` orc
2012-08-09 7:28 ` Rich Felker
2012-08-09 7:29 ` Solar Designer
2012-08-09 10:53 ` Solar Designer
2012-08-09 11:58 ` Szabolcs Nagy
2012-08-09 16:43 ` Solar Designer
2012-08-09 17:30 ` Szabolcs Nagy
2012-08-09 18:22 ` Rich Felker
2012-08-09 23:21 ` Rich Felker
2012-08-10 17:04 ` Solar Designer
2012-08-10 18:06 ` Rich Felker
2012-08-09 21:46 ` crypt_blowfish integration, optimization Rich Felker
2012-08-09 22:21 ` Solar Designer
2012-08-09 22:32 ` Rich Felker
2012-08-10 17:18 ` Solar Designer
2012-08-10 18:08 ` Rich Felker
2012-08-10 22:52 ` Solar Designer
2012-08-08 7:52 ` crypt* files in crypt directory Szabolcs Nagy
2012-08-08 13:06 ` Rich Felker
2012-08-08 14:30 ` orc
2012-08-08 14:53 ` Szabolcs Nagy
2012-08-08 15:05 ` orc
2012-08-08 18:10 ` Rich Felker
2012-08-09 1:51 ` Solar Designer
2012-08-09 3:25 ` Rich Felker
2012-08-09 4:04 ` Solar Designer
2012-08-09 5:48 ` Rich Felker
2012-08-09 15:52 ` Solar Designer
2012-08-09 17:59 ` Rich Felker
2012-08-09 21:17 ` Rich Felker
2012-08-09 21:44 ` Solar Designer
2012-08-09 22:08 ` Rich Felker
2012-08-09 23:33 ` Rich Felker
2012-08-09 6:03 ` Rich Felker
-- strict thread matches above, loose matches on Subject: below --
2012-07-17 9:40 Daniel Cegiełka
2012-07-17 17:51 ` Rich Felker
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