VLARs may be compounding the Scheduler problems

Message boards : Number crunching : VLARs may be compounding the Scheduler problems
Message board moderation

To post messages, you must log in.

Previous · 1 · 2

AuthorMessage
Profile skildude
Avatar

Send message
Joined: 4 Oct 00
Posts: 9541
Credit: 50,759,529
RAC: 137
Yemen
Message 1291207 - Posted: 4 Oct 2012, 15:21:26 UTC

I had to transfer some 2-3000 VLARs to my GPU since I was clearly not going to make the deadline just using the CPU


In a rich man's house there is no place to spit but his face.
Diogenes Of Sinope
ID: 1291207 · Report as offensive
David S
Volunteer tester
Avatar

Send message
Joined: 4 Oct 99
Posts: 18352
Credit: 27,761,924
RAC: 27
United States
Message 1291198 - Posted: 4 Oct 2012, 14:56:34 UTC

I see the splitters are all offline at the moment. I also see it didn't take long for the Crickets to ramp down once the supply of tasks ran out. Uploads are still holding their own, though. If anyone is still having upload problems right now, it may be on their end, not Berkeley's.

(I also see that my i7 downloaded a bunch of work from Einstein. I didn't count, but the whole first page of 20 on that site is freshly assigned.)

David
Sitting on my butt while others boldly go,
Waiting for a message from a small furry creature from Alpha Centauri.

ID: 1291198 · Report as offensive
Profile Fred E.
Volunteer tester

Send message
Joined: 22 Jul 99
Posts: 768
Credit: 24,140,697
RAC: 0
United States
Message 1291193 - Posted: 4 Oct 2012, 14:34:56 UTC
Last modified: 4 Oct 2012, 15:02:35 UTC

I went through about 40 of my VLAR timeouts and did not find a case where a resend went to an ATI GPU.
Another Fred
Support SETI@home when you search the Web with GoodSearch or shop online with GoodShop.
ID: 1291193 · Report as offensive
Profile Mike Special Project $75 donor
Volunteer tester
Avatar

Send message
Joined: 17 Feb 01
Posts: 32170
Credit: 79,922,639
RAC: 181
Germany
Message 1291158 - Posted: 4 Oct 2012, 12:57:04 UTC

Thats what i imagine Hal.
Will do some tests next weekend.

With each crime and every kindness we birth our future.
ID: 1291158 · Report as offensive
Profile HAL9000
Volunteer tester
Avatar

Send message
Joined: 11 Sep 99
Posts: 6533
Credit: 196,805,888
RAC: 130
United States
Message 1291155 - Posted: 4 Oct 2012, 12:50:15 UTC - in response to Message 1291143.  

All that and with ATI GPUs not alowed to have VLAR any more it a perfect storm.

Oops, it's not good ATi should get VLARs...Worth to alert Eric on this issue then.


I emailed him a whiile ago about this.
Never got a reply about it, whats unusual on technical questions.

This happened with the fix for cuda getting VLARs.

I think maybe it was a quick fix to correct the CUDA issue by disabling VLAR for all GPUs. I was not really keeping track of the issue when it came up so I'm not really sure on that.
SETI@home classic workunits: 93,865 CPU time: 863,447 hours
Join the BP6/VP6 User Group today!
ID: 1291155 · Report as offensive
Profile Mike Special Project $75 donor
Volunteer tester
Avatar

Send message
Joined: 17 Feb 01
Posts: 32170
Credit: 79,922,639
RAC: 181
Germany
Message 1291143 - Posted: 4 Oct 2012, 12:23:02 UTC - in response to Message 1291128.  
Last modified: 4 Oct 2012, 12:24:06 UTC

All that and with ATI GPUs not alowed to have VLAR any more it a perfect storm.

Oops, it's not good ATi should get VLARs...Worth to alert Eric on this issue then.


I emailed him a whiile ago about this.
Never got a reply about it, whats unusual on technical questions.

This happened with the fix for cuda getting VLARs.
With each crime and every kindness we birth our future.
ID: 1291143 · Report as offensive
Profile Wiggo "Democratic Socialist"
Avatar

Send message
Joined: 24 Jan 00
Posts: 18397
Credit: 261,360,520
RAC: 1,109
Australia
Message 1291130 - Posted: 4 Oct 2012, 11:12:10 UTC - in response to Message 1291128.  

My 2500K will take any VLAR's it can get.

Oh, it has been getting them.

But it'll gladly take more. :D

Cheers.
ID: 1291130 · Report as offensive
Profile Raistmer
Volunteer developer
Volunteer tester
Avatar

Send message
Joined: 16 Jun 01
Posts: 6242
Credit: 106,370,077
RAC: 275
Russia
Message 1291128 - Posted: 4 Oct 2012, 11:00:16 UTC - in response to Message 1291101.  

All that and with ATI GPUs not alowed to have VLAR any more it a perfect storm.

Oops, it's not good ATi should get VLARs...Worth to alert Eric on this issue then.
ID: 1291128 · Report as offensive
.clair.

Send message
Joined: 4 Nov 04
Posts: 1300
Credit: 55,390,408
RAC: 156
United Kingdom
Message 1291101 - Posted: 4 Oct 2012, 8:40:41 UTC

All that and with ATI GPUs not alowed to have VLAR any more it a perfect storm.
ID: 1291101 · Report as offensive
Grant (SSSF)
Volunteer tester

Send message
Joined: 19 Aug 99
Posts: 12990
Credit: 208,696,464
RAC: 690
Australia
Message 1291094 - Posted: 4 Oct 2012, 7:35:24 UTC - in response to Message 1291091.  


That combined with the shorties.
For me, shorties mean i can do 3-4 times the number of WUs per hour compared to "normal" WUs.
Grant
Darwin NT
ID: 1291094 · Report as offensive
Profile Fred E.
Volunteer tester

Send message
Joined: 22 Jul 99
Posts: 768
Credit: 24,140,697
RAC: 0
United States
Message 1291091 - Posted: 4 Oct 2012, 7:16:39 UTC

Like others, I've had a lot of work request timeouts and have received mostly "lost tasks" after I finally cleard my uploads and resumed work fetch. As expected, I've had about 100 lost VLAR's that were timed out by scheduler because the work request included gpu work. I got to looking at some and noticed they were almost all _2, _3, and _4 tasks. Here's an example that suggests that the VLARS are just running around in circles looking for a home tonight:

Workunit 1081757151

During one hour, it was timed out for 5 hosts and was assigned and sent to 2 for crunching. That means scheduler handled this workunit for 5 timeouts, 5 lost tasks cancellations, and 2 successful assignments (assuming those two were not also lost first). That's twelve times - is it any wonder that scheduler is not handling all the work requests? This is just part of the current overload, but....


Another Fred
Support SETI@home when you search the Web with GoodSearch or shop online with GoodShop.
ID: 1291091 · Report as offensive
Previous · 1 · 2

Message boards : Number crunching : VLARs may be compounding the Scheduler problems


 
©2020 University of California
 
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.