Prime95 v30.3 - Page 24

Mark Rose · 2020-09-09, 05:53

Quote:

Originally Posted by Prime95

Aha - a bug.

I'm glad I decided to test a low disk space situation.

Quote:

Now the only unexplained phenomenon is the work preference changing.

I've never had that one happen to me before. Considering mprime started doing PRP assignments immediately after the LLDC work finished, it probably already had a modified configuration beforehand when it fetched assignments. I had been running benchmarks, and control-c'ed out of them, so that may be the place to look?

I am certain I left mprime set to do LLDC because I figured others would be testing the new PRP hotness and thought someone should test the old.

stippix · 2020-09-09, 08:03

Hi,

FYI and just for fun,
32-bit linux version works fine for my very, very old 32-bit machines (Athlon XPs ;) using ubuntu-mate 16.04 and Linux Mint Mate 19.2,
but 32-bit Windows version 30.3beta4 and beta5 does not start on Windows XP and Windows 7,

greetings.

James Heinrich · 2020-09-09, 10:25

Quote:

Originally Posted by stippix

32-bit Windows version 30.3beta4 and beta5 does not start on Windows XP and Windows 7

I can confirm that p95v303b5.win32 crashes on startup on Win7-64:

Code:

Problem signature:
  Problem Event Name:	APPCRASH
  Application Name:	prime95.exe
  Application Version:	30.3.1.0
  Application Timestamp:	5f56f582
  Fault Module Name:	libhwloc-15.dll
  Fault Module Version:	0.0.0.0
  Fault Module Timestamp:	5ab8b310
  Exception Code:	c0000005
  Exception Offset:	00007837
  OS Version:	6.1.7601.2.1.0.256.48
  Locale ID:	1033
  Additional Information 1:	0a9e
  Additional Information 2:	0a9e372d3b4ad19135b953a78882e789
  Additional Information 3:	0a9e
  Additional Information 4:	0a9e372d3b4ad19135b953a78882e789

James Heinrich · 2020-09-09, 16:42

Something odd with the Test > Status... dialog. I realize that Prime95 will attempt to do Cert work first and therefore out-of-order compared to how it's shown here and in worktodo.txt but I don't understand why the ETA for all the Cert work is exactly the same. Bug?

jwnutter · 2020-09-09, 17:59

A question and a comment related to v30.3 b4.

Question: Can someone direct me to the HT options in v30.3 b4? For some reason I'm unable to find this menu in b4, but I recall seeing it during the initial setup.

Comment: I recall someone had an issue with a missing check in the "get occasional proof certification work" field. I too had the same issue but caught the problem before I closed the worker window. My specific issue resulted from an errant mouse click at the bottom of the worker window. After a little investigation I found that the user can modify this checkbox by clicking up to (from left to right) approximately the red vertical line shown in the image below.

James Heinrich · 2020-09-09, 18:09

Quote:

Originally Posted by jwnutter

Can someone direct me to the HT options in v30.3 b4?

Test > Worker Windows... sets the number of workers, CPU cores to use (multithreading) in that dialog set the number of threads per worker.

The settings for actual hyperthreading is under Options > Resource Limits... > Advanced... > Use hyperthreading for ___ checkboxes at the bottom.
Note however that hyperthreading is explicitly not recommended (other than for TF, which itself is not recommended for CPUs):

Quote:

Originally Posted by readme.txt

Except for trial factoring, which is best left for GPUs to do, hyperthreading often offers no performance benefit while using more electricity. You can try test if hyperthreading speeds up your worker windows by selecting these options.

jwnutter · 2020-09-09, 18:15

Quote:

Originally Posted by James Heinrich

The settings for actual hyperthreading is under Options > Resource Limits... > Advanced... > Use hyperthreading for ___ checkboxes at the bottom.
Note however that hyperthreading is explicitly not recommended (other than for TF, which itself is not recommended for CPUs):

Thanks, James. I had overlooked the advanced button. And, understood on the HT/TF comment.

Prime95 · 2020-09-09, 18:18

Quote:

Originally Posted by James Heinrich

I can confirm that p95v303b5.win32 crashes on startup on Win7-64:

Hmm, old hwloc DLL. Try this one https://www.dropbox.com/s/dmw9nbb0ve...oc-15.dll?dl=0 or get it from the hwloc website: https://www.open-mpi.org/software/hwloc/v2.2/

Quote:

Originally Posted by James Heinrich

Something odd with the Test > Status... dialog. I realize that Prime95 will attempt to do Cert work first and therefore out-of-order compared to how it's shown here and in worktodo.txt but I don't understand why the ETA for all the Cert work is exactly the same. Bug?

I'll see if I can't to better for build 6.

kriesel · 2020-09-09, 18:19

Quote:

Originally Posted by James Heinrich

The settings for actual hyperthreading is under Options > Resource Limits... > Advanced... > Use hyperthreading for ___ checkboxes at the bottom.
Note however that hyperthreading is explicitly not recommended (other than for TF, which itself is not recommended for CPUs):

Hyperthreading in primality testing typically has a speed penalty. Rarely it will show an advantage. It seems to depend on fft length, processor model, and number of workers. Benchmark and know what's best for your own setup. The guidance seems to be a good general rule, and there are exceptions. Some examples: https://www.mersenneforum.org/showpo...18&postcount=4
https://www.mersenneforum.org/showpo...19&postcount=5

Prime95 · 2020-09-09, 18:26

Quote:

Originally Posted by jwnutter

I found that the user can modify this checkbox by clicking up to (from left to right) approximately the red vertical line shown in the image below.

A new Windows annoyance! As a developer one must leave extra space after the text so that the text is not truncated when different system fonts are used (maybe not as much extra space as I allocated). MS also has an annoying habit of changing the system font with new Windows releases that can lead to dialog box text getting truncated.

stippix · 2020-09-10, 06:20

Quote:

Originally Posted by Prime95

Hmm, old hwloc DLL. Try this one https://www.dropbox.com/s/dmw9nbb0ve...oc-15.dll?dl=0 or get it from the hwloc website: https://www.open-mpi.org/software/hwloc/v2.2/

I'll see if I can't to better for build 6.

Hi,
new libhwloc from their homepage solved the problem for beta 4 and 5,
greetings.

2020-09-09, 16:42	#257
James Heinrich "James Heinrich" May 2004 ex-Northern Ontario 11×311 Posts	Something odd with the Test > Status... dialog. I realize that Prime95 will attempt to do Cert work first and therefore out-of-order compared to how it's shown here and in worktodo.txt but I don't understand why the ETA for all the Cert work is exactly the same. Bug? Attached Thumbnails

2020-09-09, 17:59	#258
jwnutter "Joe" Oct 2019 United States 114₈ Posts	A question and a comment related to v30.3 b4. Question: Can someone direct me to the HT options in v30.3 b4? For some reason I'm unable to find this menu in b4, but I recall seeing it during the initial setup. Comment: I recall someone had an issue with a missing check in the "get occasional proof certification work" field. I too had the same issue but caught the problem before I closed the worker window. My specific issue resulted from an errant mouse click at the bottom of the worker window. After a little investigation I found that the user can modify this checkbox by clicking up to (from left to right) approximately the red vertical line shown in the image below. Attached Thumbnails Last fiddled with by jwnutter on 2020-09-09 at 18:01

2020-09-09, 08:03	#255
stippix Apr 2004 10₁₆ Posts	Hi, FYI and just for fun, 32-bit linux version works fine for my very, very old 32-bit machines (Athlon XPs ;) using ubuntu-mate 16.04 and Linux Mint Mate 19.2, but 32-bit Windows version 30.3beta4 and beta5 does not start on Windows XP and Windows 7, greetings.