mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > PrimeNet > GPU to 72

Reply
 
Thread Tools
Old 2020-09-01, 19:32   #188
Aramis Wyler
 
Aramis Wyler's Avatar
 
"Bill Staffen"
Jan 2013
Pittsburgh, PA, USA

409 Posts
Default

Yeah, I got 4 of these today and hadn't noticed. I was studying the completed assignments page looking for factors, and saw it was doing TF in the 99M-100M range from 76 to 77 in 1 hour and 2 minutes, consistently, and was perplexed. I honestly thought the thing was bugged. Then I saw these Tesla V100-SXM2-16GB beasts churning away at 3600 GHzD/Day each and was like,

Last fiddled with by Aramis Wyler on 2020-09-01 at 19:35
Aramis Wyler is offline   Reply With Quote
Old 2020-09-10, 04:38   #189
kladner
 
kladner's Avatar
 
"Kieren"
Jul 2011
In My Own Galaxy!

2×3×1,667 Posts
Default Fastest V100 seen recently

Common speeds for me are 3700-3800 GHz-d/d. The one in the screen shot has been hovering around 4000. Granted, that is less than 10% variance, based on what I'm running now. Still, the variations in speed are interesting to watch. (and bigger numbers are fun anyway.)
Attached Thumbnails
Click image for larger version

Name:	Fast V100.JPG
Views:	51
Size:	79.7 KB
ID:	23303  

Last fiddled with by kladner on 2020-09-10 at 04:42
kladner is offline   Reply With Quote
Old 2020-09-10, 05:32   #190
petrw1
1976 Toyota Corona years forever!
 
petrw1's Avatar
 
"Wayne"
Nov 2006
Saskatchewan, Canada

43×103 Posts
Default

Quote:
Originally Posted by Aramis Wyler View Post
Then I saw these Tesla V100-SXM2-16GB beasts.
I've had mostly T4 lately (2 for about 90 minutes) but never a V100....just luck?
petrw1 is offline   Reply With Quote
Old 2020-09-10, 14:06   #191
chalsall
If I May
 
chalsall's Avatar
 
"Chris Halsall"
Sep 2002
Barbados

2×4,643 Posts
Default

Quote:
Originally Posted by petrw1 View Post
I've had mostly T4 lately (2 for about 90 minutes) but never a V100....just luck?
I /think/ these are only being given to the Paid Tier accounts. I also have never seen a V100, but often am given T4s.
chalsall is offline   Reply With Quote
Old 2020-09-10, 20:41   #192
lycorn
 
lycorn's Avatar
 
Sep 2002
Oeiras, Portugal

2×19×37 Posts
Default

Quote:
Originally Posted by chalsall View Post
I /think/ these are only being given to the Paid Tier accounts. I also have never seen a V100, but often am given T4s.
Same here. For the last three weeks or so, I have been given mostly T4s (alas, for very short times...) but never V100. I only use free Colab accounts.
lycorn is offline   Reply With Quote
Old 2020-09-11, 01:56   #193
kladner
 
kladner's Avatar
 
"Kieren"
Jul 2011
In My Own Galaxy!

271216 Posts
Default

I can usually get 2 T4s on free accounts. They last almost exactly 1.5 hours. Even on paid, I still get offered a P100 occasionally, but I throw them back. They use similar power (250-300 W) to a V100 for much less output. The sweet thing about T4s is they do about 1.5 times the work of a P100 for 70 W.
kladner is offline   Reply With Quote
Old 2020-09-22, 16:41   #194
LOBES
 
Mar 2019
USA

248 Posts
Default 111957247

I was given exponent 111957247 (75-76) in my Colab...it finished and submitted fine, and I can see the result in the "View Completed" section of gpu72.com.

It wasn't showing up on mersenne.org for my account....just gave it some time. When I looked at the exponent, it shows ktony completed the 75-76 already for that exponent on the same day (today 9/22).

There wasn't a factor found and its really no big deal, and I am in absolutely no way accusing ktony of anything...I just found it curious.
LOBES is online now   Reply With Quote
Old 2020-09-22, 17:52   #195
chalsall
If I May
 
chalsall's Avatar
 
"Chris Halsall"
Sep 2002
Barbados

244616 Posts
Default

Quote:
Originally Posted by LOBES View Post
I just found it curious.
It appears I have some kind of a "race condition" such that every once in awhile work is reassigned to Colab TF'ing clients.

I have spent literally hours trying to figure out my Stupid Programmer Error on this.

The good news is this manifests extremely rarely (less than once every 1,000 assignments). But I'm afraid I have no time to review my code-paths further at the moment.
chalsall is offline   Reply With Quote
Old 2020-09-22, 18:22   #196
PhilF
 
PhilF's Avatar
 
Feb 2005
Colorado

10168 Posts
Default

Quote:
Originally Posted by chalsall View Post
But I'm afraid I have no time to review my code-paths further at the moment.
And as I understand it, you could tell us why you have no time to review your code-paths, but then you'd have to kill us.
PhilF is offline   Reply With Quote
Old 2020-09-22, 18:54   #197
chalsall
If I May
 
chalsall's Avatar
 
"Chris Halsall"
Sep 2002
Barbados

100100010001102 Posts
Default

Quote:
Originally Posted by PhilF View Post
And as I understand it, you could tell us why you have no time to review your code-paths, but then you'd have to kill us.
LOL... Thanks for that.

No, I wouldn't need to kill you. But first, there would be a mountain of paperwork before I could even share the meta...
chalsall is offline   Reply With Quote
Old 2020-09-27, 06:21   #198
kladner
 
kladner's Avatar
 
"Kieren"
Jul 2011
In My Own Galaxy!

2×3×1,667 Posts
Default

To LOBES: Regardless of fault, I regret the involuntary poaching. Wasted work is a disappointment, and slows the progress. Thanks for your understanding.
Quote:
I can usually get 2 T4s on free accounts. They last almost exactly 1.5 hours.
I have stopped pursuing GPUs on free accounts. I find that I can sometimes run as many as 8 CPU-only instances, distributed over 4 free accounts. These tend to run for 12 hours, though the occasional instance cuts out in the 3-5 hour range. If I happen to check, I can often restart these.
In any case, getting 8 instances of P-1 which run for 12 hours, more or less, is a tidy bit of work which doesn't hit my electric bill.

I'm still running P-1 on 4 local workers (8 cores) just because I have the RAM to do it. I have leaned toward have one LLDC worker (2 cores each) on each of the two machines, so that P-1 usually or always gets all the RAM it wants.
I pulled my last discreet GPU weeks back because I was doing so much LLTF on Colab that a 1060 was a pitiful contribution. That 6700K machine is now drawing 180W running P95 at 4200 MHz. I am really thinking that it is cheaper to run on Colab, and stop running 2 machines 24/7. I'd still like to do some LL, though. This leads me back to running P-1 locally just to justify the RAM investment.

On the 8 core box I could see doing P-1 on 4 cores, 2 workers each; and running LL, either 1st time or DC on the other 4. On the 4 core box, 2 for LLDC and 2 for P-1 seems right.
All this leaves aside the whole PRP question. I don't have an absolute allegiance to LL, but I haven't followed PRP closely.
kladner is offline   Reply With Quote
Reply

Thread Tools


All times are UTC. The time now is 04:38.

Sat Oct 31 04:38:28 UTC 2020 up 51 days, 1:49, 2 users, load averages: 1.43, 1.71, 2.09

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.