[ofa-general] RE: [PATCH] osm: default leaf vl_stall andhead_of_queue_lifecounters

[Amit Krig]

I agree 

-----Original Message-----
From: Sasha Khapyorsky [mailto:sashak at voltaire.com] 
Sent: Tuesday, August 07, 2007 7:35 PM
To: Amit Krig
Cc: kliteyn at dev.mellanox.co.il; OpenIB
Subject: Re: [PATCH] osm: default leaf vl_stall
andhead_of_queue_lifecounters

Hi Amit,

On 10:24 Tue 07 Aug     , Amit Krig wrote:
> Hi Sasha
> 
> In the current switch configurations if you have a single drop (By 
> HOQ), the line will be flashed for 128 Mili seconds, I think that this

> penalty for ~8mili hiccup (as the HOQ can count ~50% less then 
> configured) is not a good default,

Ok. Let's start from less aggressive default values - HoQ 256msec and
VLStallCount 7 (don't need to resubmit the patch for this).

Both parameters are configurable anyway and I think it would be nice to
make deeper investigation about potentially more optimal default values.

Sasha