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Open Source and information security mailing list archives
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Date: Tue, 17 Apr 2007 17:04:31 +0400 From: Evgeniy Polyakov <johnpol@....mipt.ru> To: Francis Moreau <francis.moro@...il.com> Cc: Herbert Xu <herbert@...dor.apana.org.au>, helge.hafting@...el.hist.no, linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org Subject: Re: [CRYPTO] is it really optimized ? On Tue, Apr 17, 2007 at 02:36:09PM +0200, Francis Moreau (francis.moro@...il.com) wrote: > >> BTW, here are figures I got with 2 different versions of the driver > >> when using tcrypt module. The second being the result with the > >> optimized driver (no key reloading on each block): > >> > >> normal version: > >> test 4 (128 bit key, 8192 byte blocks): 1 operation in 67991 cycles (8192 > >> bytes) > >> > >> optimized version: > >> test 4 (128 bit key, 8192 byte blocks): 1 operation in 51783 cycles (8192 > >> bytes) > >> > >> So the gain is 16000 cycles which seems to worth the change, isn't it ? > > > >Sounds like it would. It would help of course if you posted the patch :) > > > > OK, I tried to cook up something very simple. Since I don't know this > code, please be indulgent when reading the following patch ;) Which means that after one has loaded ecryptfs module it can not use ipsec and dm-crypt if there is only one crypto algo registered... -- Evgeniy Polyakov - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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