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<== Date ==> <== Thread ==>

Subject: Re: vxWorks network problems
From: Andrew Johnson <anj@aps.anl.gov>
To: Dirk Zimoch <dirk.zimoch@psi.ch>
Cc: tech-talk@aps.anl.gov
Date: Tue, 24 May 2011 10:32:10 -0500
Hi Dirk,

On 2011-05-24 Dirk Zimoch wrote:
> 
> Has anyone changed TCP_SND_SIZE_DFLT or TCP_RCV_SIZE_DFLT in vxWorks?

Not here.

> My settings are at the moment:
> #define NUM_64          800             /* default 100 */
> #define NUM_128         800             /* default 100 */
> #define NUM_256         100             /* default 40  */
> #define NUM_512         100             /* default 40  */
> #define NUM_1024        100             /* default 25  */
> #define NUM_2048        100             /* default 25  */
> 
> #define NUM_SYS_64      1024            /* default 64  */
> #define NUM_SYS_128     1024            /* default 64  */
> #define NUM_SYS_256     512             /* default 64  */
> #define NUM_SYS_512     512             /* default 64  */

We have two different settings for these depending on the IOC's client load:

125, 400, 50, 25, 25, 25  and  256*4  for the smaller IOCs, and
250, 400, 50, 50, 25, 25  and  1024*2, 512*2 for the larger ones.

Note that in recent vxWorks 6.x releases they've replaced the network stack 
*again*, and the new one goes back to the original configuration of just 
setting the maximum amount of RAM the stack is allowed to use.

- Andrew
-- 
Optimization is the process of taking something that works and
replacing it with something that almost works, but costs less.
-- Roger Needham

References:
vxWorks network problems Dirk Zimoch
Re: vxWorks network problems Steven M. Hartman
Re: vxWorks network problems Dirk Zimoch

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