Re: port-xen/50290: Regression: xennet very slow in netbsd-7

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

The following reply was made to PR port-xen/50290; it has been noted by GNATS.

From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: port-xen-maintainer%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
        netbsd-bugs%netbsd.org@localhost, netbsd%precedence.co.uk@localhost
Subject: Re: port-xen/50290: Regression: xennet very slow in netbsd-7
Date: Mon, 5 Oct 2015 17:10:37 +0200

 On Tue, Sep 29, 2015 at 11:55:00AM +0000, Stephen Borrill wrote:
 > The following reply was made to PR port-xen/50290; it has been noted by GNATS.
 > 
 > From: Stephen Borrill <netbsd%precedence.co.uk@localhost>
 > To: gnats-bugs%NetBSD.org@localhost
 > Cc: 
 > Subject: Re: port-xen/50290: Regression: xennet very slow in netbsd-7
 > Date: Tue, 29 Sep 2015 12:51:44 +0100 (BST)
 > 
 >  This is down to options MBUFTRACE. On netbsd-5 this has little or no 
 >  impact. On netbsd-7, it kills performance. Is this a bug or expected?
 
 The xnenet mbuf code didn't change much between netbsd-5 and -7; the MCLAIM
 calls are the same. Did you try a bare-metal kernel with MBUFTRACE ?
 
 -- 
 Manuel Bouyer <bouyer%antioche.eu.org@localhost>
      NetBSD: 26 ans d'experience feront toujours la difference
 --