Posts by Matthew McCleary

1) Message boards : Number crunching : Stats not being exported (Message 2240)
Posted 31 Dec 2019 by Profile Matthew McCleary
Post:
To be honest, this is one one of the more reliable of the dozen projects that I may run. Downtime here has always been minimal.


Historically, perhaps so; however, lately this has been happening on average once a month. There is never any communication from anyone officially affiliated with the project (acknowledgement that a problem exists, or that the problem has been fixed).

Keeping those who crunch for you informed as to the status of the project is both appreciated and professional. If it weren't for Mikey taking the lead most of the time, we'd have absolutely no clue what's going on.
2) Message boards : Number crunching : Stats not being exported (Message 2235)
Posted 31 Dec 2019 by Profile Matthew McCleary
Post:
It's good to hear I'm not crazy (about this, anyhow)!

My credits are continuing to (slowly) accumulate on my Collatz page, but I've gotten several hundred errored-out workunits today. I guess nothing to do but wait it out.

I also don't seem to be able to obtain any new workunits. My miner had so many spares that it is chewing through them.
3) Message boards : Number crunching : Stats not being exported (Message 2233)
Posted 30 Dec 2019 by Profile Matthew McCleary
Post:
Errors continuing to climb (I've gotten 130 or so errored-out work units just today, when I normally only get a couple a week), but at least I'm no longer getting mysql errors when I load my account page.

Stats pages still not updating.

I PM'd Slicker, but unsurprisingly he hasn't responded. No clue whether he's aware there's a problem or doing anything about it.

It'd be nice if someone else would respond, at least so I know I'm not the only person experiencing this.
4) Message boards : Number crunching : Stats not being exported (Message 2232)
Posted 30 Dec 2019 by Profile Matthew McCleary
Post:
Looks like something (/tmp, maybe?) is out of space. Now I'm getting the following errors when I try to load my account page:

Warning: mysqli_query(): (HY000/3): Error writing file '/tmp/MYCsTGPJ' (Errcode: 28 - No space left on device) in /home/boincadm/projects/collatz/html/inc/db.inc on line 57

Warning: mysqli_fetch_object() expects parameter 1 to be mysqli_result, boolean given in /home/boincadm/projects/collatz/html/inc/db.inc on line 67

Warning: mysqli_free_result() expects parameter 1 to be mysqli_result, boolean given in /home/boincadm/projects/collatz/html/inc/db.inc on line 76
5) Message boards : Number crunching : Stats not being exported (Message 2231)
Posted 30 Dec 2019 by Profile Matthew McCleary
Post:
I am also seeing a big increase in work units that terminate with "error" status. Somebody needs to kick something on the back end.
6) Message boards : Number crunching : Stats not being exported (Message 2230)
Posted 30 Dec 2019 by Profile Matthew McCleary
Post:
There appears to have developed a problem with stats export over the past twelve hours or so.

I've verified with multiple sites (BOINCStats, FreeDC) that my numbers haven't been updated this morning.

The delta between stats sites and Collatz' page for me is typically 5-8 M credits; right now it has climbed to nearly 30 M.
7) Message boards : Number crunching : Mining rig for collatz etc crunching? (Message 2194)
Posted 17 Dec 2019 by Profile Matthew McCleary
Post:
Question do you run cpu tasks too on the mining rig? If not then the 0.25 cpu percentage isn't really ncessary as it's an 8 core cpu.


I was, but I haven't been while I've been trying to nail down the optimizations with the GPUs. I'd like to run WCG and Climate Prediction (and the CPU I've got in this box is one of the fastest i7s). I'll probably turn those back on tomorrow.
8) Message boards : Number crunching : Mining rig for collatz etc crunching? (Message 2192)
Posted 16 Dec 2019 by Profile Matthew McCleary
Post:
Those latest changes definitely did the trick! Dropped my processing time on the RX 580s from a bit over 1500 seconds to a bit over 750 seconds, a reduction of about 50%.

I also tweaked the lut_size from 18 to 17, and the sieve_size from 25 to 30, on my GTX 1080 card (in a different computer) and that dropped those times by about half too.

Very pleased with the results -- looking forward to seeing my daily numbers (which have been hovering around 28M) increase.
9) Message boards : Number crunching : Mining rig for collatz etc crunching? (Message 2191)
Posted 16 Dec 2019 by Profile Matthew McCleary
Post:
Ok, that's some good news at least. Then, please give me a sanity check here.

c:\programdata\boinc\cc_config.xml:
<cc_config>
<options>
<use_all_gpus>1</use_all_gpus>
</options>
</cc_config>


C:\ProgramData\BOINC\projects\boinc.thesonntags.com_collatz\app_config.xml:
<app_config>
<app>
<name>collatz_sieve</name>
<max_concurrent>8</max_concurrent>
<gpu_versions>
<gpu_usage>1</gpu_usage>
<cpu_usage>0.25</cpu_usage>
</gpu_versions>
</app>
</app_config>


C:\ProgramData\BOINC\projects\boinc.thesonntags.com_collatz\collatz_sieve_1.30_windows_x86_64__opencl_ati_gpu.config:

verbose=1
kernels_per_reduction=32
sleep=1
threads=8
lut_size=17
reduce_CPU=0
sieve_size=30
cache_sieve=1


(note that I changed kernels_per_reduction and sieve_size just now to match yours; will check on runtimes in 24 hours)

Are there any other config files I should check or tweak?
10) Message boards : Number crunching : Mining rig for collatz etc crunching? (Message 2188)
Posted 16 Dec 2019 by Profile Matthew McCleary
Post:
Mikey,

So even if all eight GPUs are the exact same model, I'll have to do what you describe? All eight of my GPUs are RX 580s, same manufacturer, same model.

That does indeed sound complicated. It's unfortunate that BOINC isn't more geared toward multi-GPU systems.
11) Message boards : Number crunching : Mining rig for collatz etc crunching? (Message 2175)
Posted 13 Dec 2019 by Profile Matthew McCleary
Post:
Mikey,

I applied your customizations for my mining rig (8x RX 580), but the settings seem to have had no effect. Collatz work units are still taking around 1500 seconds each, which seems like way too much time for these cards, even at stock settings.

(As an aside, my nVidia 1080 in a different box can do a Collatz unit in about 800 seconds. I applied some customization there, too, based upon tips I've found in this forum, and it didn't seem to change the numbers at all).

Is there anything I can check that might be set incorrectly? I am running a few CPU tasks (World Community Grid, ClimatePrediction), but even with the CPU idle I don't remember the work units taking any less time.
12) Message boards : Number crunching : Every time I turn off my computer or quit, all progress is lost (Message 2171)
Posted 11 Dec 2019 by Profile Matthew McCleary
Post:
Try suspending project before turning off and. Do not forget to resume project when back on.


I've confirmed this method works for me. I can suspend work, quit and relaunch BOINC Manager, and resume and Collatz work units resume where they left off.
13) Message boards : Number crunching : Mining rig for collatz etc crunching? (Message 2170)
Posted 11 Dec 2019 by Profile Matthew McCleary
Post:


Other than the app_config file I don't know how to reduce the cpu usage, but I did notice that you may not be using the optimized settings for your 580

These settings work for my own 580 running one unit at a time and doing them in about 730 seconds each.

...


Thanks -- I wasn't using any optimizations currently because I couldn't figure out the right ones for this card. I'll give yours a try and see what happens!
14) Message boards : Number crunching : Mining rig for collatz etc crunching? (Message 2165)
Posted 10 Dec 2019 by Profile Matthew McCleary
Post:
Also, I have done some experimentation with trying to get more than one Collatz thread running on a single RX 580, but haven't had good results. The Collatz process seems to take about 0.989 CPUs regardless of what I set the app_config file to, and while I can force more than one thread to run on an RX 580, it doesn't seem to result in higher throughput; quite the opposite in fact.
15) Message boards : Number crunching : Mining rig for collatz etc crunching? (Message 2164)
Posted 10 Dec 2019 by Profile Matthew McCleary
Post:
Sorry about the double post; I can't find a way to delete it.
16) Message boards : Number crunching : Mining rig for collatz etc crunching? (Message 2163)
Posted 10 Dec 2019 by Profile Matthew McCleary
Post:
Has anyone thought about using something like this loading Linux on it and adding a rig that can hold multiple gpu's and crunching for Boinc Projects on it instead of mining? I have over half a dozen older gpu's that are sitting on the shelf and was trying to think of a way to use them. Yes it would require some pci-e riser cables but they are pretty cheap I already have several older mining psu's laying around too. I have plastic tubs full of spare fans, cables, harddrives etc etc I could use if it would work.


Not only have I thought about it; I am doing so. I have a mining rig with that very same motherboard you linked, running eight RX 580s and crunching various projects (a mix of Collatz and PrimeGrid, mostly). I built it a few months ago. I tried to run Linux on it at first, but ran into lots of driver issues (I tried Debian, which is my favorite distro, and then Mint, which is based upon Debian but rumored to have better driver support). Neither one worked out and I ended up putting Windows 10 on it, and that worked much better.

It took a fair amount of tweaking to get it stable and happy, and man does it ever put out a lot of heat.

It's tempting to put better GPUs in it, as my eight-RX580 rig is only about four times faster than my *single* nVidia 1080 card -- but I got a good deal on used RX 580s on eBay ($80 each).
17) Message boards : Number crunching : Mining rig for collatz etc crunching? (Message 2162)
Posted 10 Dec 2019 by Profile Matthew McCleary
Post:
Has anyone thought about using something like this loading Linux on it and adding a rig that can hold multiple gpu's and crunching for Boinc Projects on it instead of mining? I have over half a dozen older gpu's that are sitting on the shelf and was trying to think of a way to use them. Yes it would require some pci-e riser cables but they are pretty cheap I already have several older mining psu's laying around too. I have plastic tubs full of spare fans, cables, harddrives etc etc I could use if it would work.


Not only have I thought about it; I am doing so. I have a mining rig with that very same motherboard you linked, running eight RX 580s and crunching various projects (a mix of Collatz and PrimeGrid, mostly). I built it a few months ago. I tried to run Linux on it at first, but ran into lots of driver issues (I tried Debian, which is my favorite distro, and then Mint, which is based upon Debian but rumored to have better driver support). Neither one worked out and I ended up putting Windows 10 on it, and that worked much better.

It took a fair amount of tweaking to get it stable and happy, and man does it ever put out a lot of heat.


It's tempting to put better GPUs in it, as my eight-RX580 rig is only about four times faster than my *single* nVidia 1080 card -- but I got a good deal on used RX 580s on eBay ($80 each).
18) Message boards : Science : How far has Collatz conjecture been computationally verified? (Message 2079)
Posted 18 Nov 2019 by Profile Matthew McCleary
Post:
Yeah, he kind of did.

Has Mr. Sonntag published any papers? What does he ultimately plan to do with this work we're doing for him?


I have no idea but if you can pm him he will answer once he has time. This may be a bad time as it's Fall in Michigan and that means hunting season.


Evidently "hunting season" means we shouldn't count on the -- apparently -- one person who runs this entire project to do anything project-related for months at a time. It's surprising, especially for someone who, like me, is an IT professional.

But no sense in crying about it -- there are always other worthy projects happy to accept my work. Maybe I'll check back in a few months. Maybe not.
19) Message boards : Number crunching : Nvidia RTX2080 only using 11%! Why? (Message 2078)
Posted 18 Nov 2019 by Profile Matthew McCleary
Post:
That misses the point entirely. If you subjectively think my numbers look fine while using slightly more than 1/10 of capacity, imagine what they would look like if 95% of computer power was used.


So run multiple workunits at the same time to use more of the gpu.


Go back and read his original post. He already explained why he doesn't run more than one workunit simultaneously.
20) Message boards : Science : How far has Collatz conjecture been computationally verified? (Message 2009)
Posted 30 Oct 2019 by Profile Matthew McCleary
Post:
Yeah, he kind of did.

Has Mr. Sonntag published any papers? What does he ultimately plan to do with this work we're doing for him?


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