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

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From: Herbert Xu <herbert@...>
To: Arjan van de Ven <arjan@...>
Cc: <herbert@...>, <dwmw2@...>, <austin_zhang@...>, <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 - 11:12 am

Arjan van de Ven <arjan@infradead.org> wrote:

Well AES on the PadLock is also a single instruction and nobody
has ever complained :)

Seriously, the crypto code is extremely small on the data path.
The heaviest part is the indirect function call but you have to
have that in order to support multiple implementations cleanly.

All the fat is on the control path, i.e., tfm allocation.  For
crc32c you only need a single tfm since all the state is stored
in the request object.

Note that you should ignore the existing crc32c user, iSCSI as
it was written before the new crypto hash interface was available.
I will be converting it along with the other two crc32c users. to
the new ahash interface.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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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)