From: Michal Ludvig <mludvig@suse.cz>
To: johnpol@2ka.mipt.ru
Cc: hadi@cyberus.ca, netdev@oss.sgi.com, cryptoapi@lists.logix.cz,
Eugene Surovegin <ebs@ebshome.net>
Subject: Re: Asynchronous crypto layer.
Date: Sun, 31 Oct 2004 11:46:30 +0100 [thread overview]
Message-ID: <4184C286.3000400@suse.cz> (raw)
In-Reply-To: <20041031121308.648e98f9@zanzibar.2ka.mipt.ru>
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Evgeniy Polyakov wrote:
>
>>As he points out (and i am sure he can back it with data ;->), that
>>given the setup cost, packet size, algo and CPU and bus speed, it may
>>not make sense to use the chip at all ;->
>
> Michal has numbers - pure hardware beats soft in a certain setups
> in a fully synchronous schema, let's work SW and HW in parallel.
Yes, I have *some* numbers, but consider that they are for quite
eligible setup - encrypting ~1.5k IPsec packets. I should retry with a
much smaller MTU to see the difference...
I think it won't be the programmer but the system administrator who will
have to correctly set priorities and constraints for different
hardware/software engines for the particular system. With a slow CPU it
may be worth to offload even small blocks to hardware, with a fast one
it may be worth to set HW and SW as equal, etc.
Michal Ludvig
- --
SUSE Labs mludvig@suse.cz
(+420) 296.545.373 http://www.suse.cz
Personal homepage http://www.logix.cz/michal
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next prev parent reply other threads:[~2004-10-31 10:46 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-29 6:22 Asynchronous crypto layer Evgeniy Polyakov
2004-10-29 12:42 ` jamal
2004-10-29 14:06 ` Evgeniy Polyakov
2004-10-29 14:03 ` Michal Ludvig
2004-10-29 14:36 ` Evgeniy Polyakov
2004-10-29 14:53 ` Michal Ludvig
2004-10-29 15:11 ` jamal
2004-10-29 15:27 ` Evgeniy Polyakov
2004-10-30 20:39 ` Eugene Surovegin
2004-10-30 21:17 ` Evgeniy Polyakov
2004-10-30 21:09 ` Eugene Surovegin
2004-10-30 21:46 ` Evgeniy Polyakov
2004-10-29 15:08 ` jamal
2004-10-29 15:37 ` Evgeniy Polyakov
2004-10-29 15:28 ` Michal Ludvig
2004-10-29 16:16 ` James Morris
2004-10-29 16:45 ` Evgeniy Polyakov
2004-10-29 20:00 ` Sam Leffler
2004-10-31 6:09 ` James Morris
2004-10-31 6:35 ` Sam Leffler
2004-10-30 20:35 ` Eugene Surovegin
2004-10-30 21:04 ` Evgeniy Polyakov
2004-10-30 20:56 ` Eugene Surovegin
2004-10-30 21:24 ` Evgeniy Polyakov
2004-10-30 23:41 ` jamal
2004-10-31 9:13 ` Evgeniy Polyakov
2004-10-31 10:46 ` Michal Ludvig [this message]
2004-10-31 15:03 ` jamal
2004-10-31 16:07 ` James Morris
2004-11-01 6:01 ` Evgeniy Polyakov
2004-10-31 15:36 ` Michael Richardson
2004-10-31 16:09 ` James Morris
2004-10-31 14:56 ` jamal
2004-11-01 5:12 ` Evgeniy Polyakov
2004-10-29 17:44 ` James Morris
2004-10-29 17:46 ` James Morris
2004-10-30 5:20 ` Evgeniy Polyakov
2004-10-31 5:43 ` James Morris
2004-10-30 5:19 ` Evgeniy Polyakov
2004-10-30 8:34 ` Evgeniy Polyakov
2004-10-30 8:36 ` Evgeniy Polyakov
2004-10-30 16:57 ` Michal Ludvig
2004-10-30 17:40 ` Evgeniy Polyakov
2004-10-30 20:17 ` Michal Ludvig
2004-10-30 20:56 ` Evgeniy Polyakov
2004-10-30 19:42 ` James Morris
2004-10-29 19:56 ` Sam Leffler
2004-10-30 6:16 ` Christoph Hellwig
2004-10-30 20:37 ` Evgeniy Polyakov
2004-10-31 16:05 ` James Morris
2004-11-01 5:58 ` Evgeniy Polyakov
2004-12-14 6:56 ` James Morris
2004-12-14 7:58 ` Evgeniy Polyakov
2004-11-02 15:24 ` Evgeniy Polyakov
2004-11-02 16:12 ` Evgeniy Polyakov
2004-12-14 7:23 ` James Morris
2004-12-14 8:07 ` Evgeniy Polyakov
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