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Search: Posts Made By: paulunderwood
Forum: Mlucas 2021-08-02, 00:17
Replies: 7
Views: 241
Posted By paulunderwood
Running (v20) P-1 on the a53 caused the a73 v19...

Running (v20) P-1 on the a53 caused the a73 v19 PRP run "clocks" to increase from 00:23:19 to 00:24:49.
Forum: Other Mathematical Topics 2021-08-01, 14:37
Replies: 5
Views: 226
Posted By paulunderwood
Spot the differences! OP, please keep to one...

Spot the differences! OP, please keep to one thread and do not spam this site. :grin:
Forum: Mlucas 2021-08-01, 09:06
Replies: 7
Views: 241
Posted By paulunderwood
No. It is the 2 core chip. The N2 is 2+4 cores:...

No. It is the 2 core chip. The N2 is 2+4 cores: a53+a73. I am running P-1 on the a53 and PRP on the a73.
Forum: Mlucas 2021-08-01, 06:24
Replies: 7
Views: 241
Posted By paulunderwood
On the Arm a53 of my Odroid N2, P-1 takes 8 days...

On the Arm a53 of my Odroid N2, P-1 takes 8 days for stage 1 and about 10 days for stage 2 using 54.9% of the 4GB of RAM (105Mb numbers).

On the a73 of it a PRP test takes about 6 months. :unsure:...
Forum: Software 2021-07-30, 09:06
Replies: 370
Views: 37,575
Posted By paulunderwood
When you say "working directory" what do you...

When you say "working directory" what do you mean? Are you sure it is absolutely empty? Do you have the correct permissions for the "working directory"? Have you allowed some time to elapse for the...
Forum: Riesel Prime Search 2021-07-29, 08:22
Replies: 71
Views: 26,132
Posted By paulunderwood
Congrats to Ryan for a third 3 million plus digit...

Congrats to Ryan for a third 3 million plus digit 69 prime: 69 *2^12231580 - 1 (https://primes.utm.edu/primes/page.php?id=132556) (3,682,075 decimal digits).

:banana:
Forum: Forum Feedback 2021-07-28, 06:54
Replies: 30
Views: 745
Posted By paulunderwood
I disagree. Restricting attack vectors should be...

I disagree. Restricting attack vectors should be enforced. Sure, one can upload virus.exe.zip but the mods can keep an eye on such zips. Macros hidden in spreadsheets, word processor documents and...
Forum: Forum Feedback 2021-07-26, 18:55
Replies: 30
Views: 745
Posted By paulunderwood
What about viruses and macros? :unsure:

What about viruses and macros? :unsure:
Forum: Linux 2021-07-25, 12:08
Replies: 3
Views: 321
Posted By paulunderwood
taskset?

taskset?
Forum: Hobbies 2021-07-25, 11:39
Replies: 24
Views: 610
Posted By paulunderwood
Oh come on, you know it's about 6,000 years.

Oh come on, you know it's about 6,000 years.
Forum: Hardware 2021-07-25, 02:58
Replies: 221
Views: 30,775
Posted By paulunderwood
After another auto-benchmarking by mprime the ETA...

After another auto-benchmarking by mprime the ETA is now 47 days (with 4% done) :fusion:

This is about 66% of the speed of a Radeon VII. Not bad for a cheap low-end chip.
Forum: Hardware 2021-07-23, 21:07
Replies: 221
Views: 30,775
Posted By paulunderwood
Debian 10 (Buster) installed. The chip is running...

Debian 10 (Buster) installed. The chip is running at 1.4GHz even though it says powersave. HyperThreading is off. 32 workers in 56 days for 113M bit candidates :flex: With some runtime tuning I...
Forum: Hardware 2021-07-23, 17:18
Replies: 221
Views: 30,775
Posted By paulunderwood
I will try 8 workers at some stage. I am...

I will try 8 workers at some stage.

I am currently upgrading from Deb8 to Deb10 via Deb9-- the latest Debian kernel is now running, although I expect this to make very little difference in...
Forum: Hardware 2021-07-23, 10:35
Replies: 221
Views: 30,775
Posted By paulunderwood
Recap that 4 workers would take 10 days. I tried...

Recap that 4 workers would take 10 days. I tried 16 workers again at a comparable size and it was 40 days. However 32 workers is about 70 days and uses 55% of RAM. What's more I got lucky and found a...
Forum: Hardware 2021-07-21, 15:06
Replies: 221
Views: 30,775
Posted By paulunderwood
Yes, Good question -- I'll upgrade mprime soon....

Yes,
Good question -- I'll upgrade mprime soon.
Debian 10 -- I plan to distro-upgrade the replacement disk (Debian 8) fairly soon
Forum: Hardware 2021-07-21, 13:36
Replies: 221
Views: 30,775
Posted By paulunderwood
Well, the Phi seems to favour using fewer cores...

Well, the Phi seems to favour using fewer cores but more workers and as you pointed out there is not much difference between using 32 workers compared to 64. I am currently testing 32 workers -- it...
Forum: Hardware 2021-07-21, 08:21
Replies: 221
Views: 30,775
Posted By paulunderwood
4 workers is takes about 10 days whereas 16 would...

4 workers is takes about 10 days whereas 16 would have taken 25-26 days. I'll try 32 workers when these 4 have finished. If it's less than 50 days (after tuning) I think I can forego P-1 stage 2 and...
Forum: Hardware 2021-07-20, 18:44
Replies: 221
Views: 30,775
Posted By paulunderwood
I tried 64 workers instead of 16 and tests went...

I tried 64 workers instead of 16 and tests went from 26 days to 170 days, plus I got 48 unwanted double checks. I scrubbed all that work.

Now I am running 4 workers each with 16 cores and 3072MB...
Forum: Hardware 2021-07-20, 04:03
Replies: 221
Views: 30,775
Posted By paulunderwood
It's a tricky balancing act. More throughput vs....

It's a tricky balancing act. More throughput vs. find a stage 2 factor. Here is the (edited) benchmark I ran:


Prime95 64-bit version 30.3, RdtscTiming=1
Timings for 6048K FFT length (64 cores,...
Forum: Hardware 2021-07-19, 20:57
Replies: 221
Views: 30,775
Posted By paulunderwood
Package id 0: +72.0°C (high = +80.0°C, crit =...

Package id 0: +72.0°C (high = +80.0°C, crit = +90.0°C)


I too have the case side off and that open side being 1 inch from the wall

I'm impressed by the 32 day turn around for the PRP tests...
Forum: Hardware 2021-07-19, 14:41
Replies: 221
Views: 30,775
Posted By paulunderwood
I followed your instructions up to a point and...

I followed your instructions up to a point and decided 4 cores per worker was optimal. I then fired up mprime and it automatically chose 16 workers. Now the box is screaming on this hot July day.
Forum: Hardware 2021-07-19, 01:07
Replies: 221
Views: 30,775
Posted By paulunderwood
I have a many-core Phi. My question is about how...

I have a many-core Phi. My question is about how well mprime or mlucas runs on it for current wave-front tests -- without doing benchmark tests. Would I have to run 64 instances to get maximum...
Forum: Miscellaneous Math 2021-07-17, 21:19
Replies: 49
Views: 1,441
Posted By paulunderwood
:deadhorse: Topic exhausted. Enuf said.

:deadhorse: Topic exhausted. Enuf said.
Forum: Software 2021-07-17, 18:59
Replies: 50
Views: 1,839
Posted By paulunderwood
Not quite true. 1 iteration is 1 multiplication...

Not quite true. 1 iteration is 1 multiplication plus 1 mod reduction. Of course mod reduction is fast for Mersenne numbers but not entirely insignificant. :smile:
Forum: Lounge 2021-07-13, 01:24
Replies: 262
Views: 44,566
Posted By paulunderwood
Do you have any idea how long it will take the...

Do you have any idea how long it will take the mighty GIMPS to complete [104M,168M]? I think you'll have to be patient and wait a good while for the next Mersenne prime if exponent p is beyond that...
Showing results 1 to 25 of 1000

 
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