XANSYS Message: 20611 [Go back to message list]
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Subject: Re: win2000 performance
Author: Forster Daniel forsterdaniel@
Date: 2001-01-30 08:58:00

We are using dual 10,000 rpm ultra 160 drives, I think they are quantum but
not sure. Both machines benchmarked are identical except for os so I doubt
if it is a hardware problem.

> -----Original Message-----
> From: Fern Thomassy [SMTP:fthomassy@s...]
> Sent: Monday, January 29, 2001 2:36 PM
> To: xansys
> Subject: Re: [xansys] win2000 performance

> Hi,

> I have not tried Windows 2000 yet but I have a question. What disks are
> ya'll using? Most of our NT systems use Seagate/Cheetah (10000RPM)
> SCSI-III disks and we have been happy with them. Other systems have LVD
> disks.

> I wonder if this issue is a general SCSI issue with Windows 2000 or if it
> is manufacturer specific or if it is all disks.

> Thanks in advance for all your replied ... Fern

> Fernand A. Thomassy, P.E.
> Principal Engineer
> Engine Design Section
> Southwest Research Institute
> email: fthomassy@s...
> http://enginedesign.swri.org

> On Mon, 29 Jan 2001, Mark Rodamaker wrote:

> > WE have done some testing of NT versus Win2k and have come to the same
> > conclusions. Assuming you are running in batch, there is a nice summary
> at
> > the end of the output file. The 2 OS's seem to take the same amount of
> CPU
> > time so the basic system performance is the same. The elapsed or
> wallclock
> > times are where the difference occurs with Win2k always slower.
> Apparently,
> > Disc I/O is not working as well. This may not be noticeable on some
> > problems because I/O will be far less if the run allows direct assembly
> and
> > the solver is PCG,JCG or ICCG. For nonlinear runs , there will always be
> a
> > lot of I/O so the slow I/O will be noticeable.

> > Mark Rodamaker
> > MCR Associates
> > Sunnyvale,California
> > voice: 408-736-1636

> > ----- Original Message -----
> > From: "Baskin, Bryan"
> > To:
> > Sent: Monday, January 29, 2001 7:17 AM
> > Subject: RE: [xansys] win2000 performance

> > > It was probably my email that you are referring to. We tested our new
> > > Win2000 based software load months ago and compared the performance to
> > WinNT
> > > on the same hardware. On some small jobs, no performance difference,
> but
> > on
> > > large jobs, up to 30% more clock time. On the particular test, a
> > 600,000DOF
> > > model with plasticity and contacts, this performace delta translated
> to 18
> > > additional hours of runtime. So I guess my results would seem to
> match
> > > yours. I suspect it may be I/O and or driver related and that
> non-linear
> > > models might suffer the most if that's true. If it's a driver
> problem,
> > etc.
> > > then there is hope for improvement.

> > > Kinda irritating to pay more for less, isn't it? ;-)

> > > Bryan Baskin
> > > Bell Heligottalovewinderscopter Textron, Inc.
> > > Texas.

> > > -----Original Message-----
> > > From: Forster Daniel [mailto:forsterdaniel@j...]
> > > Sent: Monday, January 29, 2001 8:55 AM
> > > To: 'xansys '
> > > Subject: [xansys] win2000 performance

> > > I have done benchmarks w/ ansys 5.6.2 on two identical machines, one
> w/
> > > win2000 and one w/ winnt and found drastic performance problems on
> win2000
> > > (30 to 60% increase in wall time). Some coworkers have not seen this
> and
> > in
> > > fact have used the same benchmark on two separate identical machines
> and
> > > found no decrease in performance. I'm surprised that I only found one
> > email
> > > in the archive related to performance problems on win2000, maybe
> something
> > > is wrong with our win2000 machine. Has anyone else had the
> opportunity to
> > > test win2000 on similar hardware that you use for winnt? Our ASD has
> > > acknowledged the performance problem but didn't give any data yet to
> > compare
> > > w/ my numbers.

> > > On the plus side, we have noticed that win2000 is much better at
> > > multitasking while ansys is running in batch mode, and may even have
> > better
> > > multi processor performance than winnt.

> > > thanks,

> > > Daniel Forster
> > > Product Engineer
> > > Axle Engineering
> > > Funk Mfg., Subsidiary of Deere and Company
> > > Voice (316) 252-3136
> > > Fax (316) 252-3432

Posts possibly associated with message #20611AuthorDateScore
20572win2000 performanceForster Daniel forsterdaniel@2001/01/29 
20574Re: win2000 performanceBryan Baskin2001/01/29 
20589Re: win2000 performanceMark Rodamaker2001/01/29 
20593Re: win2000 performanceFernand Thomassy2001/01/29 
20601Re: win2000 performanceBryan Baskin2001/01/29 
20611Re: win2000 performanceForster Daniel forsterdaniel@2001/01/30