Welcome to MilkyWay@home

Varying GPU time per task


Advanced search

Message boards : Number crunching : Varying GPU time per task
Message board moderation

To post messages, you must log in.

AuthorMessage
Oinkers

Send message
Joined: 25 Feb 16
Posts: 2
Credit: 91,815,702
RAC: 283,316
50 million credit badge3 year member badge
Message 66595 - Posted: 8 Sep 2017, 2:32:29 UTC

I've noticed for a while now that the time projects take to complete seems to vary over time somewhat unpredictably. When it's good, I'm crunching a task every ~65 seconds but this past week, for example, I've been closer to 180-350 seconds. I've been seeing my RAC dive from about 110k to about 60k now. Just want to know if this is normal or if it's something I might want to look into. I've performed plenty of BOINC resets, computer shutdowns, and graphics card updates to feel confident none of those is an issue.
ID: 66595 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Profilemikey
Avatar

Send message
Joined: 8 May 09
Posts: 2236
Credit: 259,691,923
RAC: 47,351
200 million credit badge10 year member badgeextraordinary contributions badge
Message 66596 - Posted: 8 Sep 2017, 11:06:16 UTC - in response to Message 66595.  

I've noticed for a while now that the time projects take to complete seems to vary over time somewhat unpredictably. When it's good, I'm crunching a task every ~65 seconds but this past week, for example, I've been closer to 180-350 seconds. I've been seeing my RAC dive from about 110k to about 60k now. Just want to know if this is normal or if it's something I might want to look into. I've performed plenty of BOINC resets, computer shutdowns, and graphics card updates to feel confident none of those is an issue.


One thing is you are doing different tasks right now and the new tasks are taking twice as long as the old ones.
ID: 66596 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Oinkers

Send message
Joined: 25 Feb 16
Posts: 2
Credit: 91,815,702
RAC: 283,316
50 million credit badge3 year member badge
Message 66598 - Posted: 8 Sep 2017, 12:36:22 UTC - in response to Message 66596.  

Are you saying all hosts should be taking longer to process tasks? Is there somewhere where this info is posted?
ID: 66598 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Profilemikey
Avatar

Send message
Joined: 8 May 09
Posts: 2236
Credit: 259,691,923
RAC: 47,351
200 million credit badge10 year member badgeextraordinary contributions badge
Message 66599 - Posted: 9 Sep 2017, 11:02:55 UTC - in response to Message 66598.  

Are you saying all hosts should be taking longer to process tasks? Is there somewhere where this info is posted?


I have no clue if they announced it Officially or not, they did say new units are here, don't know where I saw that now though, and they just take longer than the previous ones.
ID: 66599 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Rally1965

Send message
Joined: 30 Oct 09
Posts: 3
Credit: 5,768,893,705
RAC: 1,584,000
5 billion credit badge9 year member badgeextraordinary contributions badge
Message 66600 - Posted: 10 Sep 2017, 11:04:48 UTC - in response to Message 66595.  

Hi Oinkers and all others with the same problem.

It might be due to the inefficient throttling of the actaul GPU frequency under heavy load. At least for AMD Tahiti GPUs GPU-Z show only the set value, not the acual value. Use i.e. HWinfo (https://www.hwinfo.com/download.php) to show the actual running frequency. My expirence is that the WU time is always about the same as long as is GPU frequency is constant, only one WU is run at a time on each GPU and the CPU is not overloaded with other tasks.
ID: 66600 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote

Message boards : Number crunching : Varying GPU time per task

©2019 Astroinformatics Group