On Fri, Aug 22, 2008 at 04:27:02PM +0200, Tomasz Chmielewski wrote: > Christian Hohnstaedt schrieb: > > > >The overhead of putting the data into the kernel and into the NPE > >and back again was amortized by hardware speed only > >above 1Kbyte of data length on the IXP4xx CPU. > > In other words, it could be slower for some operations?
Yes, definitly for short data. > I was going to use it with IXP4xx CPU; and was wondering if it would be > of any help in OpenVPN traffic (which uses OpenSSL) on a loaded machine. Whenever possible, use real VPN. If you like proper VPN throughput on your IXP4xx box, use real VPN. > > >This was at least the result back then when I tested OCF-cryptodev > >with my driver. > > Do you have any benchmarks available? For opensslwith ixp4xx hw crypto? No. But google has: http://ocf-linux.sourceforge.net/benchmarks.html Where you can see that the break-even is reached at ~256 byte packets. (and not 1K as I remembered...) best regards Christian ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [email protected] Automated List Manager [EMAIL PROTECTED]
