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Search: Posts Made By: ewmayer
Forum: Software 2021-03-01, 01:03
Replies: 10
Views: 345
Posted By ewmayer
I've seen similar "flailing" behavior using...

I've seen similar "flailing" behavior using gpuOwl, but always at or just beyond a max-expo-vs-FFT breakover point, e.g. forcing an expo ~107M to run at 5.5M FFT. But there computing per-iteration...
Forum: Software 2021-02-21, 21:39
Replies: 10
Views: 345
Posted By ewmayer
I just e-mailed George in hopes he can help you...

I just e-mailed George in hopes he can help you out. The ROEs seem high for those expos @5600K, but I've no time to look through the Prime95/mprime docs to figure out how to try to force a higher FFT...
Forum: Software 2021-02-21, 20:20
Replies: 10
Views: 345
Posted By ewmayer
What FFT length is it using for these 102-103M...

What FFT length is it using for these 102-103M expos? [For such ROEs to occur in the absence of data corruption, I would expect to see an FFT length intermediate between 5120K and 5632K.] Can you...
Forum: Mlucas 2021-02-19, 19:53
Replies: 19
Views: 896
Posted By ewmayer
Thanks - that is very helpful as far as future...

Thanks - that is very helpful as far as future roadmapping goes - so for selected of the FFT lengths:
o 26M: r0 = 208 needs to be made more accurate (rejected in your test.log due to excess ROE),...
Forum: Mlucas 2021-02-18, 21:08
Replies: 19
Views: 896
Posted By ewmayer
Some pics via Amazon.com here...

Some pics via Amazon.com here (https://www.amazon.com/Apple-Mini-Chip-256GB-Storage/dp/B08N5PHB83). The pic of the rear side shows an exhaust vent similar to those on my Intel NUCs - Lorenzo, are...
Forum: GPU Computing 2021-02-18, 20:09
Replies: 358
Views: 51,757
Posted By ewmayer
@Paul: the little micro-printed owner's manual...

@Paul: the little micro-printed owner's manual that came in the box is full of weasel-wording re. warranty - "claims must be made within 30 days of purchase", huh? Then "warranty at least 2 years in...
Forum: Software 2021-02-18, 03:44
Replies: 11
Views: 416
Posted By ewmayer
ITYM "width of the floating-point mantissa". ...

ITYM "width of the floating-point mantissa".

For IEEE64 math and world-class-accurate bignum code, the crossover from 5.5M-6Mdouble FFT is right around 107Mbit.
Forum: Hardware 2021-02-18, 03:39
Replies: 162
Views: 15,968
Posted By ewmayer
I've previously reported fiddling the CPU...

I've previously reported fiddling the CPU settings via BIOS to fixed-frequency and single-thread mode, been running stably that way for some months, seemed to have no appreciable effect - plus or...
Forum: Mlucas 2021-02-17, 23:02
Replies: 19
Views: 896
Posted By ewmayer
@Lorenzo: Thanks for all the timings, that...

@Lorenzo:

Thanks for all the timings, that is very useful. I will add a note recommending '-cpu 0:7' for M1 users to the README. Might you have a wall-plug wattmeter you can use to compare...
Forum: GPU Computing 2021-02-17, 22:43
Replies: 358
Views: 51,757
Posted By ewmayer
Woke up yesterday morning, on checked on my wo...

Woke up yesterday morning, on checked on my wo multi-GPU-hosting systems, saw the open-frame 3xR7 desktop one described late spring 2020 in this thread had gone down during night, after reboot showed...
Forum: Mlucas 2021-02-16, 20:02
Replies: 19
Views: 896
Posted By ewmayer
Thanks for the predefs - looking through those...

Thanks for the predefs - looking through those triggered a recollection, that I'd previously made a note-to-self for the v20 release re. this, namely that the sysctl.h deprecation was tied not to a...
Forum: Mlucas 2021-02-15, 23:40
Replies: 19
Views: 896
Posted By ewmayer
What is needed is some way of conditionally...

What is needed is some way of conditionally including the file only on OS/kernel combinations which support it. I dumped all the compiler predefines for one of my Ubuntu v19 systems, 'uname -a '...
Forum: Mlucas 2021-02-15, 21:58
Replies: 19
Views: 896
Posted By ewmayer
Thanks - the latter is the sysctl-deprecated...

Thanks - the latter is the sysctl-deprecated warnings? Handling those is on my v20 to-do list - it's not as simple as blanket-removing the includes from platform.h, because I always try to support...
Forum: GpuOwl 2021-02-12, 21:55
Replies: 25
Views: 3,661
Posted By ewmayer
I run 2 instances per card on each of my Radeon...

I run 2 instances per card on each of my Radeon VIIs for 2 reasons:

1. Gives an total throughput boost in the 7-10% range;

2. If one job hangs or crashes - infrequent, but it does happen - one...
Forum: Mlucas 2021-02-12, 20:29
Replies: 19
Views: 896
Posted By ewmayer
README updated with corrected wget for tdulcet's...

README updated with corrected wget for tdulcet's mlucas.sh install script - original version would download and run it immediately, now users can first parse it, comment out the primenet.py -...
Forum: Hardware 2021-02-12, 00:28
Replies: 162
Views: 15,968
Posted By ewmayer
Were you using any of your monitors with a...

Were you using any of your monitors with a working system, and if so, how did you connect them (it)?

Per the mobo manual, LED2 is the HDD Activity LED, and "Green: (On/Blinking): HDD active". Red...
Forum: Mlucas 2021-02-12, 00:00
Replies: 19
Views: 896
Posted By ewmayer
Mlucas v19.1 (latest) available

Mlucas v19.1 has gone live (http://www.mersenneforum.org/mayer/README.html). Use this thread to report bugs, build issues, and for any other related discussion.

The only "must have" reason for...
Forum: Hardware 2021-02-04, 23:33
Replies: 162
Views: 15,968
Posted By ewmayer
Search for "contact" in the Mobo manual PDF, that...

Search for "contact" in the Mobo manual PDF, that shows contact info on p17, Tech Support e-mail is support@supermicro.com .

You don't happen to have one of those monster 128GB modules lying...
Forum: Mlucas 2021-02-01, 20:37
Replies: 89
Views: 22,158
Posted By ewmayer
A ha ha, I'm such an idiot - let's again look at...

A ha ha, I'm such an idiot - let's again look at your example '-s h' self-test error message:

Notice that the 'current' (= from self-test) Res35m1 value matches the 'should be' (= pretabulated...
Forum: Mlucas 2021-01-31, 23:52
Replies: 89
Views: 22,158
Posted By ewmayer
Ah, forgot to note - those incorrect reference...

Ah, forgot to note - those incorrect reference residues for the huge-FFT self-test are low-priority, I've added them to my v20 to-do list.


I plan to release 19.1 in next few days, first need to...
Forum: Mlucas 2021-01-29, 22:39
Replies: 89
Views: 22,158
Posted By ewmayer
This is more of an extended "code fun" diary...

This is more of an extended "code fun" diary entry, but thought it might be of interest to other close-to-the-metal coders who hang around here:

v19.1 shakedown testing is ongoing - Laurent D. was...
Forum: Mlucas 2021-01-24, 19:55
Replies: 89
Views: 22,158
Posted By ewmayer
Thanks for the list, T - while few or no users...

Thanks for the list, T - while few or no users will be interested in those options, the issues need to get addressed on the way to the 19.1 release.

Edit:

OK, worked through the issues you...
Forum: Mlucas 2021-01-22, 20:45
Replies: 89
Views: 22,158
Posted By ewmayer
@tdulcet - yes, off-by-one indexing error is...

@tdulcet - yes, off-by-one indexing error is precisely what it is - good catch. At line 3595 of the v19.1 Mlucas.c I posted above, that "radset = i" needs to be changed to "radset = i-1" to undo the...
Forum: Mlucas 2021-01-20, 20:21
Replies: 89
Views: 22,158
Posted By ewmayer
Hi, Joniano - Yep, that's a weird one -...

Hi, Joniano -


Yep, that's a weird one - the timings in the "clocks = ... [msec/iter]" part of each 10Kiter checkpoint-status line look perfectly reasonably for a Pi4, around 15 minutes per...
Forum: Mlucas 2021-01-20, 19:56
Replies: 89
Views: 22,158
Posted By ewmayer
For SIMD builds the runtime is dominated by the...

For SIMD builds the runtime is dominated by the asm-macro instructions, so there might in fact be little or no difference. But in any case, with the patched mi64.c file I posted earlier in this...
Showing results 1 to 25 of 1000

 
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