mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 1000
Search took 1.27 seconds.
Search: Posts Made By: Xyzzy
Forum: Lounge 2020-05-21, 12:20
Replies: 3,881
Views: 227,789
Posted By Xyzzy
https://www.maplesoft.com/applications/view.aspx?S...

https://www.maplesoft.com/applications/view.aspx?SID=6322&view=html
Forum: Science & Technology 2020-05-20, 13:03
Replies: 1,582
Views: 63,473
Posted By Xyzzy
https://www.bbc.com/news/science-environment-52719...

https://www.bbc.com/news/science-environment-52719662

It is amazing that one long-haul airplane flight is almost equal to a year of using a car.
Forum: Hardware 2020-05-19, 13:04
Replies: 158
Views: 10,118
Posted By Xyzzy
With the memory interleave setting on "channel"...

With the memory interleave setting on "channel" and with 12 cores running msieve, the CPU graph looks very different.

Before:

OXXOXO
XOXOXO
XOXOXO
XOXOXO

After:
Forum: Hardware 2020-05-19, 01:29
Replies: 158
Views: 10,118
Posted By Xyzzy
Here are all 5 possibilities: AUTO:Logical...

Here are all 5 possibilities:

AUTO:Logical Processor to NUMA Node Map:
************************ NUMA Node 0
- NUMA Node 1
Calculating Cross-NUMA Node Access Cost...
...
Forum: Lounge 2020-05-18, 13:08
Replies: 39
Views: 889
Posted By Xyzzy
Windows 10

Windows 10
Forum: Hardware 2020-05-18, 13:05
Replies: 158
Views: 10,118
Posted By Xyzzy
So to put a 6 thread job on only the "real" cores...

So to put a 6 thread job on only the "real" cores of the second CCD, we are using this command: taskset -c 12,14,16,18,20,22 nice -19 ../msieve -ncr -t 6 -v target_density=120 -i...
Forum: Hardware 2020-05-18, 12:51
Replies: 158
Views: 10,118
Posted By Xyzzy
We set the memory interleaving option in the BIOS...

We set the memory interleaving option in the BIOS from "AUTO" to "CHANNEL".

Before:Logical Processor to NUMA Node Map:
************************ NUMA Node 0
- NUMA Node 1
Calculating...
Forum: Hardware 2020-05-18, 12:25
Replies: 158
Views: 10,118
Posted By Xyzzy
Possibly useful? ...

Possibly useful?

https://www.passmark.com/forum/performancetest/41162-numa-memory-benchmarking-on-amd-threadripper...
Forum: Hardware 2020-05-18, 12:18
Replies: 158
Views: 10,118
Posted By Xyzzy
Here is the hwlock info for our CPU:AMD Ryzen...

Here is the hwlock info for our CPU:AMD Ryzen Threadripper 1920X 12-Core Processor
CPU speed: 3493.43 MHz, 12 hyperthreaded cores
CPU features: 3DNow! Prefetch, SSE, SSE2, SSE4, AVX, AVX2, FMA
L1...
Forum: Lounge 2020-05-17, 23:10
Replies: 39
Views: 889
Posted By Xyzzy
We check our "privacy" settings every time we do...

We check our "privacy" settings every time we do updates because sometimes they are "conveniently" changed.

We do updates once a month because the update process, if left to do what it wants,...
Forum: Hardware 2020-05-17, 23:06
Replies: 158
Views: 10,118
Posted By Xyzzy
We had no idea what a CCX was, so we found this:...

We had no idea what a CCX was, so we found this: https://www.tomshardware.com/reviews/amd-ccx-definition-cpu-core-explained,6338.html

Is there a way to lock a process and its threads to a...
Forum: NFS@Home 2020-05-15, 11:19
Replies: 215
Views: 13,357
Posted By Xyzzy
5_364p

p64 factor: 5211333026589870284175302418984504498676940055507472443991322299
p159 factor: ...
Forum: Hardware 2020-05-13, 12:27
Replies: 158
Views: 10,118
Posted By Xyzzy
We had Prime95 (1 thread) and msieve (12 threads)...

We had Prime95 (1 thread) and msieve (12 threads) running when we wrote the above quote. As an experiment we ran just msieve on 12 threads and the temperature dropped to 40°C!

:mike:
Forum: Lounge 2020-05-12, 00:43
Replies: 3,881
Views: 227,789
Posted By Xyzzy
sLdgM8VQu7I

sLdgM8VQu7I
Forum: Hardware 2020-05-11, 19:22
Replies: 158
Views: 10,118
Posted By Xyzzy
To reduce the heat in our study and to save a bit...

To reduce the heat in our study and to save a bit on electricity, we stripped all of our computers down and reassembled them into one big computer. (The old parts were then passed along to the feral...
Forum: Lounge 2020-05-06, 15:28
Replies: 21
Views: 1,457
Posted By Xyzzy
https://stackoverflow.blog/2020/04/27/build-your-t...

https://stackoverflow.blog/2020/04/27/build-your-technical-skills-at-home-with-online-learning/
Forum: Lounge 2020-05-06, 12:09
Replies: 17
Views: 208
Posted By Xyzzy
The other day we had a bee/wasp fly down our...

The other day we had a bee/wasp fly down our jacket while riding our motorcycle on the highway. It stung us several times as we quickly pulled over. We pulled off our helmet, jacket and shirt and...
Forum: Lounge 2020-05-01, 22:22
Replies: 114
Views: 20,841
Posted By Xyzzy
W18 Summary Balance from previous week: $84...

W18 Summary

Balance from previous week: $84
New donations: $50
Expenditures: $30
New balance: $104
Total donations overall: $3780
Notes:

The $30 is for May's web server fee.
Forum: NFS@Home 2020-05-01, 22:17
Replies: 37
Views: 3,602
Posted By Xyzzy
Sure! Just let us know when and what to do. ...

Sure! Just let us know when and what to do.

:mike:
Forum: NFS@Home 2020-04-30, 11:31
Replies: 37
Views: 3,602
Posted By Xyzzy
We would like to reserve the next 33-bit job that...

We would like to reserve the next 33-bit job that comes along.

:mike:
Forum: NFS@Home 2020-04-29, 22:36
Replies: 37
Views: 3,602
Posted By Xyzzy
107331526897849_17m1 is in post processing. ...

107331526897849_17m1 is in post processing.

:mike:
Forum: Astronomy 2020-04-29, 11:54
Replies: 3
Views: 567
Posted By Xyzzy
https://arxiv.org/pdf/2003.13879.pdf :mike:

https://arxiv.org/pdf/2003.13879.pdf

:mike:
Forum: Msieve 2020-04-27, 22:12
Replies: 15
Views: 2,387
Posted By Xyzzy
The 20 thread run somehow ended up slower than...

The 20 thread run somehow ended up slower than the 12 thread run.

12 = 8h04m50s
20 = 8h32m31s
24 = 7h59m33s

:mike:
Forum: Msieve 2020-04-27, 12:16
Replies: 15
Views: 2,387
Posted By Xyzzy
We ran a 24 thread test last night. It was 1.09%...

We ran a 24 thread test last night. It was 1.09% faster than the 12 thread job. During the run, the CPU reported roughly 1700% utilization, so there must be a lot of overhead and/or bottlenecks. We...
Forum: NFS@Home 2020-04-26, 15:50
Replies: 215
Views: 13,357
Posted By Xyzzy
2_853p

p73 factor: 1016865974718926835504331889603463606849107786090369947606282596102089693
p140 factor:...
Showing results 1 to 25 of 1000

 
All times are UTC. The time now is 02:28.

Mon May 25 02:28:02 UTC 2020 up 61 days, 1 min, 0 users, load averages: 1.24, 1.35, 1.35

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.