misc/132277: poor performance using criptodevice for IPSEC

[Patrick Lamaizière]

The following reply was made to PR kern/132277; it has been noted by GNATS.

From: Patrick =?ISO-8859-15?Q?Lamaizi=E8re?= <patfbsd at davenulle.org>
To: bug-followup at FreeBSD.org
Cc: Vasile Marii <marii.vasile at gmail.com>
Subject: Re: misc/132277: poor performance using criptodevice for IPSEC
Date: Sat, 14 Mar 2009 13:05:52 +0100

 Le Sun, 8 Mar 2009 20:00:11 GMT,
 Patrick Lamaizière <patfbsd at davenulle.org>:
 
 >  I've made some tests on IPsec with glxsb and the performances are
 > very bad (around 14 Mbits).
 >  
 >  I think the problem is that glxsb handles only one request at a time.
 >  When it is busy, it blocks the Open Crypto Framework with ERESTART
 > and it unblocks the OCF when the previous request is completed. Then
 > the OCF has to wake up and to resubmit the request. It looks like
 > this performs very badly when using it with IPsec.
 >  
 >  If glxsb processes the requests synchronously it performs quite
 > better, around 50 Mbits.
 
 I've filled a PR with a patch for glxb(4): kern/132622
 
 Regards.