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Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC32c algorithm by new crypto API.

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From: Chris Mason <chris.mason@...>
To: David Woodhouse <dwmw2@...>
Cc: Austin Zhang <austin_zhang@...>, <herbert@...>, <davem@...>, <linux-kernel@...>, <linux-crypto@...>
Subject: Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC32c algorithm by new crypto API.
Date: Monday, August 4, 2008 - 9:45 am

On Mon, 2008-08-04 at 11:45 +0100, David Woodhouse wrote:

Long term I'd like to switch btrfs to the crypto api, but right now I'm
using libcrc32c.

code wrong, but it looks like my choices are to either have a long
standing context and use locking around the digest/hash calls to protect
internal crypto state, or create a new context every time and take a
perf hit while crypto looks up the right module.

Either way it looks slower than just calling good old libcrc32c.

-chris

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Messages in current thread:
[PATCH] Using Intel CRC32 instruction to accelerate CRC32c a..., Austin Zhang, (Mon Aug 4, 5:35 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Randy Dunlap, (Mon Aug 4, 1:27 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Austin Zhang, (Tue Aug 5, 6:12 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 10:19 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Austin Zhang, (Tue Aug 5, 5:59 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Tue Aug 5, 6:44 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 10:18 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., David Woodhouse, (Mon Aug 4, 10:13 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Austin Zhang, (Tue Aug 5, 5:51 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 10:17 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., David Woodhouse, (Mon Aug 4, 6:12 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Austin Zhang, (Mon Aug 4, 6:35 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., David Woodhouse, (Mon Aug 4, 6:45 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Chris Mason, (Mon Aug 4, 9:45 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 11:42 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Benoit Boissinot, (Mon Aug 4, 2:02 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 10:08 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Chris Mason, (Mon Aug 4, 12:14 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 12:45 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Arjan van de Ven, (Mon Aug 4, 1:06 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 1:10 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 1:13 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Helge Hafting, (Tue Aug 5, 7:10 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Tue Aug 5, 10:04 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 10:04 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Arjan van de Ven, (Mon Aug 4, 10:20 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 11:12 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., David Woodhouse, (Mon Aug 4, 10:49 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 10:54 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Austin Zhang, (Mon Aug 4, 6:58 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., David Woodhouse, (Mon Aug 4, 7:25 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Sebastian Siewior, (Mon Aug 4, 6:25 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 6:48 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., David Woodhouse, (Mon Aug 4, 6:27 am)