RE: NFS performance problems on vxWorks

["Williams Jr, Ernest L." <ernesto@ornl.gov>]

-----Original Message-----
From: Andrew Johnson [mailto:anj@aps.anl.gov]
Sent: Fri 11/12/2004 10:43 AM
To: Dirk Zimoch
Cc: EPICS tech-talk
Subject: Re: NFS performance problems on vxWorks
 
Hi Dirk,

Dirk Zimoch wrote:
> 
> It seems, our BSP is not using the End driver. I don't have a sysEnd.c 
> file. I have a configNet.h file, that defines a network config string:

You probably are using and end driver, it just doesn't use the setup I 
described.  Your load string defines the parameter you need to modify. 
Change this:

> #define DEC_LOAD_STRING "0xfe020000:0x0:0x12:0x12:-1:-1:-1:0:0x80000000"

into this:

#define DEC_LOAD_STRING "0xfe020000:0x0:0x12:0x12:128:-1:-1:0:0x80000000"

The individual parameters are described in the vxWorks documentation for 
the dec21x40End library (section 1), which explains that the default vaue 
for <nrds> is 32; increasing that should significantly improve your NFS 
performance on a busy network.


We have also noticed the improvement here at the SNS by increasing the endPool resources as well.



Note that in recent versions of the driver (provided with WRS patches or a 
recent version of Tornado), there are several more optional parameters 
that can control the network MII phy interface.  These may not be 
documented other than in the source code.

- Andrew
-- 
Dear God, I didn't think orange went with purple until I saw
the sunset you made last night.  That was really cool. - Caro