𝕏

Strange cpu behaviour

Message boards : Number crunching : Strange cpu behaviour
Message board moderation

To post messages, you must log in.

AuthorMessage
[VENETO] boboviz

Send message
Joined: 9 Apr 15
Posts: 167
Credit: 1,343,637
RAC: 1,611
Message 140 - Posted: 19 Apr 2015, 21:26:58 UTC
Last modified: 19 Apr 2015, 21:27:30 UTC

On an "old" mobile cpu (Intel T4400, with 2200 Whetstone and 4270 Dhrystone) wus duration is 1800 secs. With other cpu (Amd FX-6300, with 2850 Whetstone and 10500 Dhrystone) wus are 2800 secs. Both are Win7.
Is it normal?
ID: 140 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Profile jcastro
Avatar

Send message
Joined: 16 Mar 15
Posts: 219
Credit: 14,859
RAC: 0
Message 141 - Posted: 20 Apr 2015, 12:22:23 UTC

Hi!
Could you give us more information about those tasks? With that data we think that it can be possible, but if you send us more data of those specific WUs we will give you a more specific answer.

Thanks for you attention, Joel.
ID: 141 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Aurel

Send message
Joined: 9 Apr 15
Posts: 6
Credit: 825
RAC: 0
Message 142 - Posted: 20 Apr 2015, 15:36:18 UTC - in response to Message 140.  

On an "old" mobile cpu (Intel T4400, with 2200 Whetstone and 4270 Dhrystone) wus duration is 1800 secs. With other cpu (Amd FX-6300, with 2850 Whetstone and 10500 Dhrystone) wus are 2800 secs. Both are Win7.
Is it normal?


Please give us the device number. (via URL)
"For every problem exist an solution, we just need to find it. This counts for Goldbach┬┤s-Conjecture, too."
-Me
Just working on it^^
ID: 142 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
[VENETO] boboviz

Send message
Joined: 9 Apr 15
Posts: 167
Credit: 1,343,637
RAC: 1,611
Message 143 - Posted: 20 Apr 2015, 16:40:01 UTC - in response to Message 142.  
Last modified: 20 Apr 2015, 17:18:35 UTC

Please give us the device number. (via URL)


http://denis.usj.es/denisathome/show_host_detail.php?hostid=1413 (Intel Dual Core)
http://denis.usj.es/denisathome/show_host_detail.php?hostid=285 (AMD Six Core)

Edit: it's a FPU problem? AMD Bulldozer core has shared FPU..
ID: 143 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
NATE1
Avatar

Send message
Joined: 8 Apr 15
Posts: 15
Credit: 15,562
RAC: 0
Message 144 - Posted: 20 Apr 2015, 19:26:17 UTC - in response to Message 143.  

Please give us the device number. (via URL)


http://denis.usj.es/denisathome/show_host_detail.php?hostid=1413 (Intel Dual Core)
http://denis.usj.es/denisathome/show_host_detail.php?hostid=285 (AMD Six Core)

Edit: it's a FPU problem? AMD Bulldozer core has shared FPU..

that and

http://www.extremetech.com/computing/100583-analyzing-bulldozers-scaling-single-thread-performance

a bit dated but still valid....
There are more things in heaven and earth, Horatio,
Than are dreamt of in your philosophy.
- Hamlet (1.5.167-8), Hamlet to Horatio

my age > Event 1

"Do not meddle in the affairs of Wizards, for they are subtle and quick to anger."
ID: 144 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
[VENETO] boboviz

Send message
Joined: 9 Apr 15
Posts: 167
Credit: 1,343,637
RAC: 1,611
Message 146 - Posted: 21 Apr 2015, 7:09:13 UTC - in response to Message 144.  

a bit dated but still valid....


I know that FX-6300 is not a high-end-cpu (like Xeon), but this is the only project (both crunch Rosetta, Poem, Tn-Grid, ecc) in which is slower than mobile cpu (that is used at 60%, cause heat).
ID: 146 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote

Message boards : Number crunching : Strange cpu behaviour