Win10 - Win11 performance
Hello fellows, we updated one of our PCs to Win11. The very same hardware with the very same FEM shows different runtimes. The hardware is: AMD Ryzen Threadripper PRO 5955WX 16-Cores
I runtime increases by 20% when I generate several superelements (CMS with several modes).
In the statistics I see a significant difference at Latency and core to core communication
Win10:
Latency time from master to core 1 = 1.970 microseconds
Latency time from master to core 2 = 2.105 microseconds
Latency time from master to core 3 = 2.093 microseconds
Communication speed from master to core 1 = 20742.58 MB/sec
Communication speed from master to core 2 = 6701.18 MB/sec
Communication speed from master to core 3 = 6684.55 MB/sec
Win11:
Latency time from master to core 1 = 3.217 microseconds
Latency time from master to core 2 = 3.404 microseconds
Latency time from master to core 3 = 3.353 microseconds
Communication speed from master to core 1 = 12289.54 MB/sec
Communication speed from master to core 2 = 6421.27 MB/sec
Communication speed from master to core 3 = 6412.72 MB/sec
Does anybody have similar experiences?
Mit freundlichen Grüßen / Kind regards
i.A. Peter Eisenträger
Senior Development Engineer CAE
OHB Digital Connect GmbH
Weberstraße 21
55130 Mainz / Germany
Tel. +49-6131-2777-106
Fax. +49-6131-2777-205
eMail: Peter.Eisentraeger@ohb.demailto:Peter.Eisentraeger@ohb.de
Internet: https://ohb-dc.de
Geschäftsführer: Dennis Winkelmann, Dr. Dieter Birreck, Fabrice Scheid
Sitz der Gesellschaft: Bremen
Registergericht: Amtsgericht Bremen, HRB 20042
We upgraded a few machines here too. One thing I caught right a way was
that hyperthreading got turned on for Windows-11 and we had to turn it back
off. ANSYS doesn't like hyperthreading and they recommend disabling it.
Other than that, I haven't noticed any slow down.
-----Original Message-----
From: Eisenträger, Peter via Xansys xansys-temp@list.xansys.org
Sent: Tuesday, October 21, 2025 2:42 AM
To: xansys-temp@list.xansys.org
Cc: Eisenträger, Peter peter.eisentraeger@ohb.de
Subject: [External] - [Xansys] Win10 - Win11 performance
CAUTION: This email originated from outside of the organization. Do not
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Hello fellows, we updated one of our PCs to Win11. The very same hardware
with the very same FEM shows different runtimes. The hardware is: AMD Ryzen
Threadripper PRO 5955WX 16-Cores
I runtime increases by 20% when I generate several superelements (CMS with
several modes).
In the statistics I see a significant difference at Latency and core to core
communication
Win10:
Latency time from master to core 1 = 1.970 microseconds
Latency time from master to core 2 = 2.105 microseconds
Latency time from master to core 3 = 2.093 microseconds
Communication speed from master to core 1 = 20742.58 MB/sec
Communication speed from master to core 2 = 6701.18 MB/sec
Communication speed from master to core 3 = 6684.55 MB/sec
Win11:
Latency time from master to core 1 = 3.217 microseconds
Latency time from master to core 2 = 3.404 microseconds
Latency time from master to core 3 = 3.353 microseconds
Communication speed from master to core 1 = 12289.54 MB/sec
Communication speed from master to core 2 = 6421.27 MB/sec
Communication speed from master to core 3 = 6412.72 MB/sec
Does anybody have similar experiences?
Mit freundlichen Grüßen / Kind regards
i.A. Peter Eisenträger
Senior Development Engineer CAE
OHB Digital Connect GmbH
Weberstraße 21
55130 Mainz / Germany
Tel. +49-6131-2777-106
Fax. +49-6131-2777-205
eMail: Peter.Eisentraeger@ohb.demailto:Peter.Eisentraeger@ohb.de
Internet:
https://urldefense.com/v3/https://ohb-dc.de;!!KM6X6ZXWXVtZMQ!Y-E8-vj_iyh
pbdeJLv1TFtc_MYVB-ik9Ps9eyG3wtluKxxLaSP-WxDrK65dUpZToPEkOuCFnKN_K-guCMGoH1Tq
EgQ$
Geschäftsführer: Dennis Winkelmann, Dr. Dieter Birreck, Fabrice Scheid Sitz
der Gesellschaft: Bremen
Registergericht: Amtsgericht Bremen, HRB 20042
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Hey Joe!
Thanks for your suggestion. I run the same FEM with different settings:
Win10 with hyperthreading off:
| CP Time (sec) = 9542.000 Time = 14:23:58 |
| Elapsed Time (sec) = 3587.000 Date = 10/23/2025 |
Win10 with hyperthreading on:
| CP Time (sec) = 9582.094 Time = 09:24:38 |
| Elapsed Time (sec) = 3593.000 Date = 10/21/2025 |
Win11 with hyperthreading off:
| CP Time (sec) = 9869.891 Time = 12:33:11 |
| Elapsed Time (sec) = 3698.000 Date = 10/23/2025 |
Win11 with hyperthreading on:
| CP Time (sec) = 11576.141 Time = 16:32:46 |
| Elapsed Time (sec) = 4392.000 Date = 10/20/2025 |
Mit freundlichen Grüßen / Kind regards
i.A. Peter Eisenträger
Senior Development Engineer CAE
OHB Digital Connect GmbH
Weberstraße 21
55130 Mainz / Germany
Tel. +49-6131-2777-106
Fax. +49-6131-2777-205
eMail: Peter.Eisentraeger@ohb.de
Internet: https://ohb-dc.de
Geschäftsführer: Dennis Winkelmann, Dr. Dieter Birreck, Fabrice Scheid
Sitz der Gesellschaft: Bremen
Registergericht: Amtsgericht Bremen, HRB 20042
-----Ursprüngliche Nachricht-----
Von: Joe Metrisin (US) Joe.Metrisin@kratosdefense.com
Gesendet: Dienstag, 21. Oktober 2025 12:01
An: XANSYS Mailing List Home xansys-temp@list.xansys.org
Cc: Eisenträger, Peter peter.eisentraeger@ohb.de
Betreff: RE: [External] - [Xansys] Win10 - Win11 performance
We upgraded a few machines here too. One thing I caught right a way was
that hyperthreading got turned on for Windows-11 and we had to turn it back
off. ANSYS doesn't like hyperthreading and they recommend disabling it.
Other than that, I haven't noticed any slow down.
-----Original Message-----
From: Eisenträger, Peter via Xansys xansys-temp@list.xansys.org
Sent: Tuesday, October 21, 2025 2:42 AM
To: xansys-temp@list.xansys.org
Cc: Eisenträger, Peter peter.eisentraeger@ohb.de
Subject: [External] - [Xansys] Win10 - Win11 performance
CAUTION: This email originated from outside of the organization. Do not
click links or open attachments unless you recognize the sender and know the
content is safe.
Hello fellows, we updated one of our PCs to Win11. The very same hardware
with the very same FEM shows different runtimes. The hardware is: AMD Ryzen
Threadripper PRO 5955WX 16-Cores
I runtime increases by 20% when I generate several superelements (CMS with
several modes).
In the statistics I see a significant difference at Latency and core to core
communication
Win10:
Latency time from master to core 1 = 1.970 microseconds
Latency time from master to core 2 = 2.105 microseconds
Latency time from master to core 3 = 2.093 microseconds
Communication speed from master to core 1 = 20742.58 MB/sec
Communication speed from master to core 2 = 6701.18 MB/sec
Communication speed from master to core 3 = 6684.55 MB/sec
Win11:
Latency time from master to core 1 = 3.217 microseconds
Latency time from master to core 2 = 3.404 microseconds
Latency time from master to core 3 = 3.353 microseconds
Communication speed from master to core 1 = 12289.54 MB/sec
Communication speed from master to core 2 = 6421.27 MB/sec
Communication speed from master to core 3 = 6412.72 MB/sec
Does anybody have similar experiences?
Mit freundlichen Grüßen / Kind regards
i.A. Peter Eisenträger
Senior Development Engineer CAE
OHB Digital Connect GmbH
Weberstraße 21
55130 Mainz / Germany
Tel. +49-6131-2777-106
Fax. +49-6131-2777-205
eMail: Peter.Eisentraeger@ohb.demailto:Peter.Eisentraeger@ohb.de
Internet:
https://urldefense.com/v3/https://ohb-dc.de;!!KM6X6ZXWXVtZMQ!Y-E8-vj_iyh
pbdeJLv1TFtc_MYVB-ik9Ps9eyG3wtluKxxLaSP-WxDrK65dUpZToPEkOuCFnKN_K-guCMGoH1Tq
EgQ$
Geschäftsführer: Dennis Winkelmann, Dr. Dieter Birreck, Fabrice Scheid Sitz
der Gesellschaft: Bremen
Registergericht: Amtsgericht Bremen, HRB 20042
Xansys mailing list -- xansys-temp@list.xansys.org To unsubscribe send an
email to xansys-temp-leave@list.xansys.org If you are receiving too many
emails from XANSYS please consider changing account settings to Digest mode
which will send a single email per day.
Please send administrative requests such as deletion from XANSYS to
xansys-mod@tynecomp.co.uk and not to the list