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drummers-lowrise
1) Message boards : Storm message board (Message 144818)
Posted 31 days ago by Profile Spear


Mega's are hard to get.


10 years gone, and none for me still.
2) Message boards : Storm message board (Message 144470)
Posted 41 days ago by Profile Spear
A random musing on something I noted when playing about with my new 3090.

It doesn't scale well on small workloads.

A GFN-15 takes around 50 seconds on a 3090.
but on a GTX1030, it takes 150 seconds. That would mean 3x 1030s costing €180 would have the same work rate as a €2000 3090.

If I was only running GFN-15s on it, I'd be wasting a huge amount of it's potential.
3) Message boards : Number crunching : WW testing (Message 144434)
Posted 41 days ago by Profile Spear


The error should be fixed now, if you could test the new build that would be appreciated.


Works now:

WWocl version 1.0 by Bryan Little
Compiled Oct 19 2020 with GCC 8.1.0
A Wieferich and WallSunSun prime number search program
Based on wwwwcl by Mark Rodenkirch and primesieve by Kim Walisch
START below minimum. Starting search at 127
Starting search at: 127
Stopping search at: 60000000000
init_data.xml not found, using device 0.
GPU Info:
Name: GeForce RTX 3090
Vendor: NVIDIA Corporation
Driver: 456.71
Compute Units: 82
Beginning a new search with parameters from the command line
Starting search...
Tests done: 19.9252%
Tests done: 39.8505%
Tests done: 59.7757%
Tests done: 79.7009%
Checkpoint: start: 127 stop: 60000000000 current: 50000000127
Checkpoint time: 11 seconds. 2119660489 primes tested (192.70 Million primes per second).
Checkpoint range size 50000000000 processed at 4545.45 Million numbers per second.
Estimated time remaining: 2s
Tests done: 96.6168%
Checkpoint: start: 127 stop: 60000000000 current: 60000000000
Checkpoint time: 2 seconds. 404384060 primes tested (202.19 Million primes per second).
Checkpoint range size 9999999873 processed at 5000.00 Million numbers per second.
Estimated time remaining: 0s
Workunit complete. Average speed: 197.44 Million primes per second.
Checksum: 2F32CAD23BA5B1CA

Results file has 5255 special instances, two primes.
4) Message boards : Number crunching : WW testing (Message 144431)
Posted 41 days ago by Profile Spear


But in case 2 I don't get a CRC. The results file has two primes and 4472 special instances.

stderr suggests some unhappiness:

Detected Windows 10.0, using compute preemption.
Kernel profile: 65.608 ms. Estimated / Actual worksize: 1312000000 / 2999642969
Verifying GPU kernels using range 127 to 2000127...
GPU prime generator kernel test passed. (148957 PRPs)
GPU Wieferich/WallSunSun kernel tests passed. (142429717748 checksum, 3159 results)
Starting search...
Computation error, GPU found a composite result: 914255785

That's on Windows, nvidia driver 456.71.


thanks for testing, i'm looking into this error.


I found that it's fine with a parameter up to 6e8:

Checkpoint range size 599999873 processed at 600.00 Million numbers per second.
Estimated time remaining: 0s
Workunit complete. Average speed: 31.33 Million primes per second.
Checksum: 3A693971FB152B22

It's with 6e9 up it fails.
5) Message boards : Number crunching : WW testing (Message 144426)
Posted 41 days ago by Profile Spear
If someone tests a 3080 could you also post the primes per second average speed? Thanks


I've a 3090 if that's of use, but the GPU link is 404.


There's a stray s on the end of it, I have the executable now.

So for 1 and 3 I get CRCs of

67029FBFBC1AEFB0 Average speed: 87.63 Million primes per second.

and

B8B040FA3813FEB2 Average speed: 134.97 Million primes per second.

But in case 2 I don't get a CRC. The results file has two primes and 4472 special instances.

stderr suggests some unhappiness:

Detected Windows 10.0, using compute preemption.
Kernel profile: 65.608 ms. Estimated / Actual worksize: 1312000000 / 2999642969
Verifying GPU kernels using range 127 to 2000127...
GPU prime generator kernel test passed. (148957 PRPs)
GPU Wieferich/WallSunSun kernel tests passed. (142429717748 checksum, 3159 results)
Starting search...
Computation error, GPU found a composite result: 914255785

That's on Windows, nvidia driver 456.71.
6) Message boards : Number crunching : WW testing (Message 144425)
Posted 41 days ago by Profile Spear
If someone tests a 3080 could you also post the primes per second average speed? Thanks


I've a 3090 if that's of use, but the GPU link is 404.
7) Message boards : Storm message board (Message 144045)
Posted 52 days ago by Profile Spear
It seems I got me a RTX 3090, got the dispatch notification a few minutes ago. The next few days will be a painful wait.
8) Message boards : Storm message board (Message 141437)
Posted 147 days ago by Profile Spear


Very nice, that will be one powerful box. Are the 3090s going to be dual gpu, like the 690s?


I don't believe so, they seem to be taking what was previously the Ti position in branding.

There's still some significant confusion over the branding/naming arragements, so this could all still change.
9) Message boards : Storm message board (Message 141433)
Posted 147 days ago by Profile Spear
Been a while since posting. Took a short sabbatical crunching some other stuff. :-) I see y'all have been putting some significant effort into efforts on Stream's server which is cool. :-) Been going through some pretty hot weather around here which has definitely impacted my crunching capacity.

So any of you have any of the new nvidia cards yet?


Still way too early to get the new nVidias, not till October or so.

But I plan on a pair of 3090s (assuming the naming is correct, which is dubious), to replace my old pair of 1080s.
10) Message boards : Storm message board (Message 141038)
Posted 159 days ago by Profile Spear
Posted this elsewhere but it probably belongs here too.

Last GFN17 Mega on 24th May, due soon :)

Good opportunity for "when the cats away" strategy Spear? Skip the challenge and fingers crossed?


I had switched back to GFN17 low, but I've moved to Mega now.


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