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Search: Posts Made By: ewmayer
Forum: News 2021-03-08, 21:43
Replies: 4
Views: 50
Posted By ewmayer
Ah, you're doing 100Mdigit work - I don't know...

Ah, you're doing 100Mdigit work - I don't know what the default p-1 protocol for those is supposed to be. PMing George to see if he can clarify.
Forum: News 2021-03-08, 20:21
Replies: 4
Views: 50
Posted By ewmayer
Which program are you using? If gpuowl, it's been...

Which program are you using? If gpuowl, it's been doing a combined p-1 stage 1 and first-few-%-of-PRP since v7. That means that such a run starts out looking like a PRP, but the first few Miterations...
Forum: Mlucas 2021-03-08, 20:01
Replies: 1
Views: 68
Posted By ewmayer
M107353937 proved a bit too large to handle @5.5M...

M107353937 proved a bit too large to handle @5.5M FFT, even with the newly-reinstated HIACC carry code - here are the ROEs > 0.4375 hit in the first half-million iterations (I omit the 0.4375 ones,...
Forum: Mlucas 2021-03-07, 23:51
Replies: 1
Views: 68
Posted By ewmayer
Mlucas v20: Preview of coming detractions, or something :)

As I've noted elsewhere, v20 will have p-1 factoring support as its major feature add, with some details such as "fused p-1 stage 1 and PRP testing?" not yet finalized. (PRP-proof support will be in...
Forum: Software 2021-03-07, 21:50
Replies: 20
Views: 759
Posted By ewmayer
George, when doing e.g. PRP-testing and p-1 stage...

George, when doing e.g. PRP-testing and p-1 stage 1 we need to be able to include a small constant integer multiplier like 3 in the round-and-carry-step anyway, yes? Here some simple sample code from...
Forum: GPU Computing 2021-03-07, 20:30
Replies: 7
Views: 514
Posted By ewmayer
Oh, but reducing functionality after you buy...

Oh, but reducing functionality after you buy their product is exactly what various companies are already doing - for instance Apple is notorious for this...
Forum: Hardware 2021-03-05, 21:27
Replies: 166
Views: 16,753
Posted By ewmayer
Thanks, though as usual I needed reading glasses....

Thanks, though as usual I needed reading glasses. :)

My own rule of thumb for manycore-system runs is to go with whichever combo has the fewest #workers and yields at least 95% of the maximum...
Forum: Hardware 2021-03-05, 20:37
Replies: 15
Views: 815
Posted By ewmayer
I can only speak for the Radeon VII numbers, for...

I can only speak for the Radeon VII numbers, for which that page's ~300GHz-D/D are just over half the ~500GHz-D/D I get from each of my R7's, running underclocked (sclk=3) and pulling ~200W/GPU.
...
Forum: Hardware 2021-03-05, 20:15
Replies: 166
Views: 16,753
Posted By ewmayer
What worker/thread combination does its...

What worker/thread combination does its auto-tuner suggest is best in total-throughput terms?
Forum: Software 2021-03-01, 01:03
Replies: 20
Views: 759
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: 20
Views: 759
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: 20
Views: 759
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: 985
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: 985
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: 52,914
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: 445
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: 166
Views: 16,753
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: 985
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: 52,914
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: 985
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: 985
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: 985
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: 3,770
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: 985
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: 166
Views: 16,753
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...
Showing results 1 to 25 of 1000

 
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