Dell Precision T5500 dual CPU problem

Message boards : Number crunching : Dell Precision T5500 dual CPU problem

To post messages, you must log in.

AuthorMessage
mippi

Send message
Joined: 26 Mar 20
Posts: 5
Credit: 53,227,174
RAC: 0
Message 102168 - Posted: 4 Jul 2021, 4:32:57 UTC

I have a Dell Precision T5500 workstation with Xeon X5690 (6 cores 12 threads). I used the computer with Rosetta for a few months achieve average points >9k. Recently I decided to buy a second CPU and upgrade RAM to 36GB. After installing the second CPU, I started processing 24 jobs at the same time, but my average points stay at nearly the same level. When I analyse points for each tasks they are more less 50% of the pervious achievements. So, it seems that I can process two times more tasks, but I spend 2x less computing power on each task. I upgraded BIOS and I tested two memory access models and it is still the same. Both CPUs work at 100% power, uptime shows >24, so from operating system point of view everything seems to be OK, but it is not. I did not change anything in the boinc/rosetta config files, because I could not find any place which I should change for dual CPI.
Has anybody found similar problem and how it was solved? Any help would be very appreciated.
ID: 102168 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
Profile Grant (SSSF)

Send message
Joined: 28 Mar 20
Posts: 1498
Credit: 14,729,488
RAC: 16,392
Message 102169 - Posted: 4 Jul 2021, 5:22:49 UTC - in response to Message 102168.  
Last modified: 4 Jul 2021, 5:28:55 UTC

Has anybody found similar problem and how it was solved? Any help would be very appreciated.
You need to run the BOINC Benchmarks as presently it is using the default values. BOINC Manager (Advanced view), Tools, Run CPU benchmarks.

Your Intel(R) Xeon(R) CPU X5690 @ 3.47GHz
Measured floating point speed 1000 million ops/sec
Measured integer speed        1000 million ops/sec


Your Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz
Measured floating point speed 4552.11 million ops/sec
Measured integer speed       64769.29 million ops/sec
As they are used for working out Credit, it's resulting very little Credit being granted. Run the benchmarks, and a more appropriate amount of Credit will be awarded.

A quick check shows at least 4 or 5 of your systems are using the default values, so the Credit each of them is getting is much less than it should be.
Re-run the benchmarks on all of your systems to be sure they're all getting as much Credit as they should be.


Given that you are running multiple projects, i would suggest setting your cache to zero
Store at least            0.0 days of work
Store up to an additional 0.01 days of work
and using the default CPU runtime for Rosetta Tasks (which is 8 hours).
When project or system issues occur, or you make other changes to your settings, this will allow your Resource share settings to be honoured in a much shorter time frame (several days to a week) instead of the month(s) it would presently take.
Grant
Darwin NT
ID: 102169 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
mippi

Send message
Joined: 26 Mar 20
Posts: 5
Credit: 53,227,174
RAC: 0
Message 102178 - Posted: 5 Jul 2021, 1:39:24 UTC - in response to Message 102169.  

Thanks for your reply, I performed benchmark tests and I will see some results in two days. Target time in my case is 36h and I don't want to change, because I have to minimise network traffic, so at least now it has to stay as it is.
ID: 102178 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote

Message boards : Number crunching : Dell Precision T5500 dual CPU problem



©2024 University of Washington
https://www.bakerlab.org