Posts by mfc
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1) Message boards : Number crunching : Short Deadline (Message 19642)
Posted 1313 days ago by Profile mfc
I got a WU with very short deadline. Please check if anything wrong.


Task: 7695697
Work Unit: 6933113
Sent: 19 Jun 2014, 19:27:17 UTC
deadline: 19 Jun 2014, 19:36:43 UTC
Status: Timed out - no response
Application: Micro Collatz Conjecture v6.00
2) Message boards : News : Missing Apps Part 2 (Message 19366)
Posted 1358 days ago by Profile mfc

I like the idea, but it is a lot easier said than done...

For CPUs, I've now figured out where to inject the code to compare the rated integer operations per second (IOPS) for the Micro WUs and could implement that as well for the Mini WUs that are CPU based thereby "forcing" people to run one or the other. Unfortunately, GPUs don't provide IOPS and I haven't seen any benchmark software (e.g. Dhrystone) for GPUs that I could use.

...


Dear Slicker:

Yes, I know it is complicate to make any changes on the system.
Please don't mind for my (crasy) ideas.

About the GPU's IOPS, you may consider estimate it on each WU reported
and update to the host's profile.
(IOPS = Estimated computation size / Elapsed time)

However, a host may have multiple GPUs with variant computation power
and, as you said, someone may just want to run short WUs for any reason.
It is just for your reference.

:)
3) Message boards : News : Missing Apps Part 2 (Message 19355)
Posted 1359 days ago by Profile mfc
... the credit bonus will not be awarded when any work unit is completed in less than 30 minutes.
...


Dear Slicker:

One suggestion on WU assignment:

Stop feed new WU of a specific application type (for example: Mini, 6.04 (opencl_nvidia_gpu)) to the host with last 'Run time' reported < 30 minutes.

This filter should not apply to the Large applications. Because there are no larger WUs available for the host.
4) Message boards : News : Missing Apps Part 2 (Message 19321)
Posted 1361 days ago by Profile mfc
Dear Slicker:

Some WUs have very short deadline. Please check it.
(However, it is just ok. I can complete the WUs before deadline.)


6288959 5741706 2 May 2014, 21:07:30 UTC 4 May 2014, 3:36:58 UTC In progress --- --- --- Mini Collatz Conjecture v6.00
6288022 5817152 2 May 2014, 20:21:51 UTC 4 May 2014, 2:51:19 UTC In progress --- --- --- Mini Collatz Conjecture v6.00

ps: Issued at 2 May, deadline at 4 May.
5) Message boards : News : Missing Apps (Message 19257)
Posted 1366 days ago by Profile mfc
Dear Slicker:

Please remove gpu applications in Mini project,

The running time of Mini tasks on gpu will be too short
(say < 10 mins in previous screenshot)
which will increase the task initial overhead and server load.

The better configuration should be:

Micro project: for ARMs only.
Mini Project: for CPU only
Solo & Large Project: for GPU only.

Thanks for your consideration.




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