mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > Data > Marin's Mersenne-aries

Reply
 
Thread Tools
Old 2021-01-02, 15:43   #56
kruoli
 
kruoli's Avatar
 
"Oliver"
Sep 2017
Porta Westfalica, DE

1101100112 Posts
Default

You are sincerly welcome!

The machine is an AMD Threadripper 1950X. In the moment, I am running two threads per worker.

Previously, with all memory slots populated, I had this:
Code:
Timings for 480K FFT length (16 cores, 1 worker):  0.60 ms.  Throughput: 1661.77 iter/sec.
Timings for 480K FFT length (16 cores, 2 workers):  0.63,  0.56 ms.  Throughput: 3369.52 iter/sec.
Timings for 480K FFT length (16 cores, 4 workers):  0.96,  0.88,  0.94,  1.01 ms.  Throughput: 4239.61 iter/sec.
Timings for 480K FFT length (16 cores, 8 workers):  1.70,  1.71,  1.89,  1.89,  1.90,  1.90,  1.77,  1.70 ms.  Throughput: 4438.59 iter/sec.
Timings for 480K FFT length (16 cores, 16 workers):  3.40,  3.42,  3.44,  3.45,  3.36,  3.40,  3.42,  3.43,  3.46,  3.52,  3.43,  3.47,  3.43,  3.51,  3.48,  3.43 ms.  Throughput: 4651.21 iter/sec.
So I ran only one thread per worker. I guess that the combination of small FFT with the big CPU caches made these results possible.

Now, with only two memory modules, I have (attention, slightly bigger FFT size!):
Code:
Timings for 512K FFT length (16 cores, 1 worker):  0.65 ms.  Throughput: 1528.24 iter/sec.
Timings for 512K FFT length (16 cores, 2 workers):  0.52,  0.55 ms.  Throughput: 3724.46 iter/sec.
Timings for 512K FFT length (16 cores, 4 workers):  0.88,  0.90,  0.91,  0.93 ms.  Throughput: 4419.46 iter/sec.
Timings for 512K FFT length (16 cores, 8 workers):  1.76,  1.77,  1.76,  1.82,  1.75,  1.77,  1.81,  1.85 ms.  Throughput: 4480.33 iter/sec.
Timings for 512K FFT length (16 cores, 16 workers):  6.58,  6.58,  6.65,  6.74,  6.57,  6.56,  6.56,  6.86,  6.72,  6.70,  6.65,  6.84,  6.98,  6.58,  6.56,  6.70 ms.  Throughput: 2397.05 iter/sec.
In the moment, I don't want to tinker too much with that machine. Since last week, I never got it up running with four memory channels. I already cleaned the machine and reseated the CPU two times. I used a totally different set of DIMMs and also permutated the order in which I installed them.

In contrast, on an AMD Ryzen 3800X, I got this (with larger FFTs, again):
Code:
Timings for 560K FFT length (8 cores, 1 worker):  0.35 ms.  Throughput: 2826.81 iter/sec.
Timings for 560K FFT length (8 cores, 2 workers):  0.51,  0.50 ms.  Throughput: 3991.92 iter/sec.
Timings for 560K FFT length (8 cores, 4 workers):  0.92,  0.94,  0.94,  0.93 ms.  Throughput: 4279.59 iter/sec.
Timings for 560K FFT length (8 cores, 8 workers):  2.09,  2.08,  2.07,  2.04,  2.07,  2.17,  2.06,  2.06 ms.  Throughput: 3847.43 iter/sec.
Timings for 560K FFT length (8 cores hyperthreaded, 1 worker):  0.36 ms.  Throughput: 2758.59 iter/sec.
Timings for 560K FFT length (8 cores hyperthreaded, 2 workers):  0.48,  0.48 ms.  Throughput: 4141.37 iter/sec.
Timings for 560K FFT length (8 cores hyperthreaded, 4 workers):  0.93,  0.88,  0.90,  0.91 ms.  Throughput: 4430.35 iter/sec.
Timings for 560K FFT length (8 cores hyperthreaded, 8 workers):  2.18,  2.28,  2.13,  2.12,  2.09,  2.21,  2.29,  2.26 ms.  Throughput: 3647.35 iter/sec.
It runs all four DIMM slots populated, running at 3,600 MHz, 16-16-16-36. Interestingly, 8 cores hyperthreaded with 4 workers is the fastest setting. It is around the same speed as the 1950X with my current settings (with somewhat smaller FFTs), which has double the cores. I did not find my old benchmarks of hyperthreading on the 1950X, but IIRC, it was not beneficial for Prime95.

Last fiddled with by kruoli on 2021-01-02 at 15:44 Reason: Spelling.
kruoli is offline   Reply With Quote
Old 2021-01-04, 20:36   #57
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

23×7×167 Posts
Default

Fancy graphic to gawk at.
Attached Thumbnails
Click image for larger version

Name:	PRP-CF.png
Views:	115
Size:	48.7 KB
ID:	24117  
Uncwilly is online now   Reply With Quote
Old 2021-01-05, 06:17   #58
LaurV
Romulan Interpreter
 
LaurV's Avatar
 
Jun 2011
Thailand

23·19·61 Posts
Default

They'll finish faster (when red reached the point where green was when we began, and not where red will intersect green, that's because new prps don't need dc anymore - maybe sometime towards the end of February?)
LaurV is offline   Reply With Quote
Old 2021-01-05, 22:15   #59
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

23×7×167 Posts
Default

There are/were still (I think) some of the first time CF-PRP's being turned in that are not being done by v29. The rate of change will accelerate quickly once we do get close to those that were turned in shortly after v30 came out.
Uncwilly is online now   Reply With Quote
Old 2021-01-08, 15:53   #60
kruoli
 
kruoli's Avatar
 
"Oliver"
Sep 2017
Porta Westfalica, DE

3×5×29 Posts
Default Weekly Update

Currently, in the range from 9M to 11M, there are 2,049 PRP-CF-DCs assigned. In total, there are 26,114 exponents to go.

That means, we have a progress of around 485 exponents per day, so ETA with our current speed is around 54 days.

PS: What will happen, when we run out of PRP-CF-DC work? Will Prime95 fetch PRP-CF instead?

Last fiddled with by kruoli on 2021-01-08 at 15:54 Reason: Clarified intentions.
kruoli is offline   Reply With Quote
Old 2021-01-08, 21:04   #61
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

23·7·167 Posts
Default

I believe that it would roll over to FT PRP-CF.
Uncwilly is online now   Reply With Quote
Old 2021-01-14, 18:09   #62
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

23×7×167 Posts
Default

Quote:
Originally Posted by kruoli View Post
Yesterday, a machine with 16 workers of mine all doing PRP-CF-DC broke down and spontaneously decided to ignore two of its memory channels.
I have a 6 core machine that I am using to do LL-DC and PRP-CF-DC (3 cores to each task.) I had the 3 cores for PRP-CF-DC as 1 worker. After seeing your post I shifted to 3 workers 1 core each for a while. It turns out I get better throughput by having a single worker. Once we get caught up to the PRP-CF-FTC the worker will be reverted to LL-DC work.
Uncwilly is online now   Reply With Quote
Old 2021-01-15, 18:57   #63
kruoli
 
kruoli's Avatar
 
"Oliver"
Sep 2017
Porta Westfalica, DE

3·5·29 Posts
Default Weekly Update

The wavefront will likely hit 10M today!

Currently, in the range from 9M to 11M, there are 1,544 PRP-CF-DCs assigned. In total, there are 22,497 exponents to go.

That means, we have a progress of around 517 exponents per day, so ETA with our current speed is around 44 days.
kruoli is offline   Reply With Quote
Old 2021-01-15, 19:05   #64
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

23·7·167 Posts
Default

Quote:
Originally Posted by kruoli View Post
The wavefront will likely hit 10M today!
Not quite yet.
9997987 is the highest DC
10005887 is a FTC as are: 10144691 and 10005887
Uncwilly is online now   Reply With Quote
Old 2021-01-15, 19:17   #65
kruoli
 
kruoli's Avatar
 
"Oliver"
Sep 2017
Porta Westfalica, DE

3·5·29 Posts
Default

Sorry, bad phrasing:
I wanted to say that we will likely hit 10M in the assigment wavefront today (when using the time zone of this forum).

Last fiddled with by kruoli on 2021-01-15 at 19:20 Reason: Interpunctation.
kruoli is offline   Reply With Quote
Old 2021-01-16, 05:21   #66
LaurV
Romulan Interpreter
 
LaurV's Avatar
 
Jun 2011
Thailand

220708 Posts
Default

Quote:
Originally Posted by kruoli View Post
so ETA with our current speed is around 44 days.
Which matches well my initial approximation above, for end of February. Looking to my status page (which shows the number of people doing each kind of work, each one with his own, but the number of participants is the same if you access yours) I see new people "jumping in" daily, so the given time is quite realistic.
LaurV is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Finish started assignments but don't get new? jas Software 5 2020-02-06 04:06
Need a way to finish exponent and have it automatically quit. jasong Software 4 2007-02-21 23:13
where do TF go when they finish? markr Data 5 2005-03-09 05:19
How to finish? 1997rj7 Lone Mersenne Hunters 2 2003-10-19 05:33
Resetting projected finish dates Kevin Software 5 2003-07-07 13:42

All times are UTC. The time now is 04:23.

Mon Mar 1 04:23:05 UTC 2021 up 88 days, 34 mins, 0 users, load averages: 1.63, 2.02, 1.94

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, 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.