[Info-vax] Accuweather new contract

[Kerry Main]

> -----Original Message-----
> From: Info-vax [mailto:info-vax-bounces at info-vax.com] On Behalf Of
> Craig A. Berry
> Sent: 29-Mar-15 9:13 PM
> To: info-vax at info-vax.com
> Subject: Re: [New Info-vax] Accuweather new contract
> 
> On 3/29/15 6:03 PM, Kerry Main wrote:
> >> -----Original Message-----
> >> From: Info-vax [mailto:info-vax-bounces at info-vax.com] On Behalf Of
> >> johnson.eric at gmail.com
> >> Sent: 29-Mar-15 4:49 PM
> >> To: info-vax at info-vax.com
> >> Subject: Re: [New Info-vax] Accuweather new contract
> 
> >> My basic mode of comparison was... how long does it take to send a
> >> single
> >> 80 byte UDP packet. I measured that by doing that in a tight loop. It
> was
> >> pretty
> >> easy to write a portable version that ran on both Linux and VMS. For
> >> grins
> >> I also write a version that used the QIO$ interface. That improved
> things
> >> a little
> >> bit, but Linux still won by a wide margin.
> >>
> >> EJ
> >
> > Not saying that Linux might be marginally faster, but usually when
> there Is
> > a "wide margin", there is usually something else under pinning the
> results.
> >
> > When network results like this are seen, I usually think of the mis-
> matched
> > full duplex auto-config issue with older network gear, NIC's and drivers.
> 
> Kerry, please read more details of Eric's careful analysis in the
> archives of this group before posting such nonsense.

As I recall, Eric's previous analysis showed OpenVMS network numbers 
to be approx. half those of Linux which would be exactly what would be
he case if the autoconfig issue were present when he did the testing.

Either that or one must believe that Linux network numbers are twice 
those of OpenVMS using similar network configs - something I find a bit 
of a stretch.

The autoconfig issue is well known and has in various environments
impacted VAX, Alpha & Integrity. I have seen it first hand in a number
of different sites.

http://labs.hoffmanlabs.com/node/907 


Regards,

Kerry Main
Back to the Future IT Inc.
 .. Learning from the past to plan the future

Kerry dot main at backtothefutureit dot com