[Beowulf] tcp error: Need ideas!

Joe Landman landman at scalableinformatics.com
Sun Jan 25 10:32:05 EST 2009


Gerry Creager wrote:
> Joe Landman wrote:
>> I wonder if the switch could be implicated.  We have seen some (cheap) 
>> GbE switches not support (in practice) jumbo frames (irrespective of 
>> literature).
> 
> Been there, done that.  HP claims to be able to handle packets up to 
> 9000 bytes of payload. (9122 total, IIRC)

Ok, modern Procurves are good.  Its unlikely to be this.

[...]

> But here's the one I love:
> -bash-3.2# ethtool -K tso off
> no offload settings changed

Hmmm... driver sounds borked if it advertises being able to turn tso 
on/off and then doesn't let you.

> I apparently can't control things with ethtool...

... smells like the driver.

[...]

>>>> I'll go snag the new driver and compile it.  After all: What can it 
>>>> hurt!

Any luck with this?  I pulled down the tarball and built it here on a 
2.6.9 based machine without incident.  Not RPM format (no .spec file), 
but fairly painless to build.



-- 
Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics LLC,
email: landman at scalableinformatics.com
web  : http://www.scalableinformatics.com
        http://jackrabbit.scalableinformatics.com
phone: +1 734 786 8423 x121
fax  : +1 866 888 3112
cell : +1 734 612 4615
_______________________________________________
Beowulf mailing list, Beowulf at beowulf.org
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf

-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.



More information about the Beowulf mailing list