Posts by Sergei Chernykh

51) Message boards : Number crunching : Intel ARC support ? (Message 1836)
Posted 3 Mar 2024 by Sergei Chernykh
Post:
I've changed the plan class to:
	<plan_class>
		<name>opencl_intel_gpu</name>
		<opencl/>
		<gpu_type>intel</gpu_type>
		<host_summary_regex>Arc</host_summary_regex>
		<min_gpu_ram_mb>800</min_gpu_ram_mb>
		<gpu_ram_used_mb>800</gpu_ram_used_mb>
		<cpu_frac>0.0001</cpu_frac>
	</plan_class>


This regex is very simple and it should match your host.
52) Message boards : Number crunching : Intel ARC support ? (Message 1834)
Posted 3 Mar 2024 by Sergei Chernykh
Post:
I entered the wrong name for Intel GPUs in the plan class, it should be fixed now.
53) Message boards : Number crunching : Intel ARC support ? (Message 1832)
Posted 3 Mar 2024 by Sergei Chernykh
Post:
I have enabled Intel ARC GPUs with the new GPU application version (3.07). If you have GPU tasks enabled on your end, you should be getting tasks now.
54) Message boards : Number crunching : Intel ARC support ? (Message 1831)
Posted 3 Mar 2024 by Sergei Chernykh
Post:
Thanks! I will try to remove the "Intel bad" check from my code tomorrow, and use the similar config.
55) Message boards : Number crunching : Intel ARC support ? (Message 1827)
Posted 3 Mar 2024 by Sergei Chernykh
Post:
Maybe I could find a set of parameters for plan class that would filter out integrated GPUs: https://boinc.berkeley.edu/trac/wiki/AppPlanSpec#GPUApps
For example, I could limit min_gpu_ram_mb to 5 GB for Intel GPUs, min_gpu_peak_speed to some value that Intel ARC GPUs pass and integrated GPUs don't pass. I'd like to know how exactly PrimeGrid did this.
56) Message boards : Number crunching : RAC dropping (Message 1825)
Posted 3 Mar 2024 by Sergei Chernykh
Post:
It depends on which number ranges the project is checking. Some are slower, some are faster. Thankfully, part 3 WUs are much more uniform, and I tweaked them to be a bit faster than what part 2 has.
57) Message boards : Number crunching : Intel ARC support ? (Message 1824)
Posted 3 Mar 2024 by Sergei Chernykh
Post:
https://github.com/SChernykh/Amicable/blob/boinc-opencl-version-128-bit/Amicable/Amicable_OpenCL.cpp#L138

Now I remember why I disabled it. Intel has many CPUs with integrated graphics (which is not Intel ARC), and their driver quality is very bad, they never worked. Maybe they improved today.
58) Message boards : Number crunching : Intel ARC support ? (Message 1818)
Posted 2 Mar 2024 by Sergei Chernykh
Post:
You can just download https://sech.me/boinc/Amicable/download/Amicable_OpenCL_v_3_06.exe and then run it with command line 
/from 2*5*7*19*259777759 /to 2*5*7*19*259875541 /task_size 500185564895
. If it runs and finishes without errors, then it should work fine on Intel ARC.
59) Message boards : Number crunching : Intel ARC support ? (Message 1816)
Posted 2 Mar 2024 by Sergei Chernykh
Post:
Both AMD and NVIDIA use the same OpenCL application here, so if Intel drivers are stable enough to run it, it's possible. You can run the GPU app in offline mode and pass it the command line from any workunit to see if it works.
60) Message boards : News : Beta test of part 3 of the 10^21 search (Message 1794)
Posted 11 Feb 2024 by Sergei Chernykh
Post:
The test finished, new applications were confirmed to work.
61) Message boards : News : Beta test of part 3 of the 10^21 search (Message 1787)
Posted 24 Jan 2024 by Sergei Chernykh
Post:
It's good that macOS application works because I don't have any Mac around to test it. If you want to get 100% consistent GPU load, you'll need to run 2 tasks in parallel - you have enough GPU memory for this.
62) Message boards : News : Beta test of part 3 of the 10^21 search (Message 1785)
Posted 24 Jan 2024 by Sergei Chernykh
Post:
I've added a few more work units to the test. You should get some tasks soon.
63) Message boards : News : Beta test of part 3 of the 10^21 search (Message 1783)
Posted 24 Jan 2024 by Sergei Chernykh
Post:
Yes, no one with macOS had test applications enabled.
64) Message boards : News : Beta test of part 3 of the 10^21 search (Message 1781)
Posted 24 Jan 2024 by Sergei Chernykh
Post:
I will reduce GPU memory requirements back to 1 GB as soon as this test is over, so you can keep crunching until the end of part 2.
65) Message boards : News : Beta test of part 3 of the 10^21 search (Message 1779)
Posted 24 Jan 2024 by Sergei Chernykh
Post:
It requires ~2550 MB with kernel size 21 and ~2300 MB with kernel size 18, so it's definitely more than 2047 MB. GPUs with <= 2GB RAM can't run it, they will most likely fail with an error.

P.S. Maybe your GPU drivers used system memory?
66) Message boards : News : Beta test of part 3 of the 10^21 search (Message 1775)
Posted 24 Jan 2024 by Sergei Chernykh
Post:
I hope this error is fixed in v3.06 as well.
67) Message boards : News : Beta test of part 3 of the 10^21 search (Message 1774)
Posted 24 Jan 2024 by Sergei Chernykh
Post:
The self-test should be fixed in v3.06 of the test application, please check it.
68) Message boards : News : Beta test of part 3 of the 10^21 search (Message 1772)
Posted 24 Jan 2024 by Sergei Chernykh
Post:
Hmm, I'm actually getting useful data now, for example in https://sech.me/boinc/Amicable/result.php?resultid=72251208 there is a list of numbers which are supposed to be amicable, but they're not. It means there is some bug in the self test (in combination with GCC compiler), I'll look into it.
69) Message boards : News : Beta test of part 3 of the 10^21 search (Message 1771)
Posted 24 Jan 2024 by Sergei Chernykh
Post:
This test is to find out how many computers actually fail the self-test. If it prints that your GPU couldn't find some known amicable numbers, then it's useless for the project (with the current application). If it turns out that all Linux hosts fail the test, then I will need to figure out how to fix it, even if it's not a bug in my code (Windows hosts work fine).
70) Message boards : News : Beta test of part 3 of the 10^21 search (Message 1770)
Posted 24 Jan 2024 by Sergei Chernykh
Post:
The older version doesn't have this self-test, so even if it ran smoothly it could skip some numbers. Self-test makes sure that the OpenCL code is compiled correctly and works as it was supposed to work.

I've updated the test application to a new version, it has a few bugfixes and it also prints more detailed information if self-test fails. You can test how your computers work with the new version.
71) Message boards : News : Beta test of part 3 of the 10^21 search (Message 1767)
Posted 23 Jan 2024 by Sergei Chernykh
Post:
"Self-test failed" means that the compiled OpenCL code couldn't process a known amicable number properly and returned false negative for at least one of them. The new GPU application has a built-in list of ~2000 numbers to check all the essential code paths. If you get this error, the only way to fix it is to try different driver versions. The driver/OS combination you use can't compile the OpenCL code correctly.
72) Message boards : News : Beta test of part 3 of the 10^21 search (Message 1765)
Posted 23 Jan 2024 by Sergei Chernykh
Post:
The beta test is running now. I've added 2000 work units to find different ways of how new GPU applications can fail. You can expect many failed tasks there, so if you don't want it, you can disable "Run test applications" in https://sech.me/boinc/Amicable/prefs.php?subset=project
73) Message boards : News : Beta test of part 3 of the 10^21 search (Message 1764)
Posted 22 Jan 2024 by Sergei Chernykh
Post:
Part 2 of the 10^21 search will be over some time in March this year, so it's time to start getting ready for part 3! I found a few bugs in the current GPU applications that needed to be fixed (CPU applications are fine).

To make sure everything works as intended, I will launch a small beta-test of the part 3 search by the end of this week. The new work units will require ~2.5-2.7 GB RAM on CPU, and the same amount of RAM on GPU (for GPU applications), so the minimum requirement for GPUs will be 3 GB RAM.

The purpose of the test is to confirm that all OS/CPU/GPU combinations work properly and confirm that 3 GB GPUs can process the new work units.
74) Message boards : Bug tracker : Amicable Numbers using ~8 gigabytes of Ram (Message 1763)
Posted 22 Jan 2024 by Sergei Chernykh
Post:
This is memory allocated by the program. Not all of it is in the physical computer memory, some part of it will be swapped out if you exceed 8 GB (in your case). It's not recommended because swapping slows down computations significantly.
75) Message boards : Bug tracker : 2) Another workunit that is stuck but both computers finished the task (Message 1756)
Posted 13 Jan 2024 by Sergei Chernykh
Post:
There were more than 1000 such workunits, I don't know why exactly. I've manually unstuck them.
76) Message boards : Random stuff : Support for Intel GPUs? (Message 1748)
Posted 2 Jan 2024 by Sergei Chernykh
Post:
If they support OpenCL (they should), then the existing GPU app should already work there.
77) Message boards : Getting started : process exited with code 255 (Message 1723)
Posted 20 Sep 2023 by Sergei Chernykh
Post:
If you google for "Error getting function data from server", it looks like some problem with GPU driver. Newer (or sometimes older) driver versions might work without this error.
78) Message boards : Number crunching : 10^22 (Message 1717)
Posted 17 Aug 2023 by Sergei Chernykh
Post:
10^21 search will also have part 3 and it will take more time than part 2, we're talking years and years more. So it's a bit early to talk about 10^22
79) Message boards : Bug tracker : WU waiting for validation but both tasks are finished since the day before yesterday! (Message 1713)
Posted 3 Aug 2023 by Sergei Chernykh
Post:
Fixed
80) Message boards : Number crunching : Long running tasks (Message 1706)
Posted 30 Jul 2023 by Sergei Chernykh
Post:
I commented regarding this issue before, it's not the first time the project goes through slow search ranges. The positive side of this is we're finding a lot of new amicable pairs now (more than 4000 new pairs today).
81) Message boards : Bug tracker : Missing French translations for project actions in Boinc Manager (Message 1696)
Posted 2 Jul 2023 by Sergei Chernykh
Post:
gui_urls.xml is a single file in project root folder, it doesn't have any translations. As far as I can see, it's not possible to add translations for it.
82) Message boards : Bug tracker : Infinite loop WU ? (Message 1688)
Posted 17 Jun 2023 by Sergei Chernykh
Post:
Factorization '0' is incorrect: 0 is not a prime

This error means that your checkpoint file is corrupt. You should manually delete it from working folder - the file name is "amicable_checkpoint".
83) Message boards : Bug tracker : Infinite loop WU ? (Message 1686)
Posted 17 Jun 2023 by Sergei Chernykh
Post:
I tested this WU on both Windows and Linux CPU versions, and it didn't get into an infinite loop.

Windows:
11:00:11 (7588): Can't open init data file - running in standalone mode
11:35:25 (7588): called boinc_finish(0)

Linux:

12:05:18 (2396): Can't open init data file - running in standalone mode
12:40:55 (2396): called boinc_finish(0)


It took around 35-36 minutes on 7950X, so it should take no more than 5-6 hours even on weaker CPU. It's one of those WUs that are better suited for GPU application.
84) Message boards : Bug tracker : Your ReCaptcha response was not correct. Please try again. (Message 1671)
Posted 7 May 2023 by Sergei Chernykh
Post:
Thanks for the hint, I've added https://www.google.com/recaptcha/api.js to the page template.
85) Message boards : Number crunching : No new amicable pairs (Message 1666)
Posted 27 Apr 2023 by Sergei Chernykh
Post:
There are not many new pairs right now, but they are being found: https://sech.me/ap/log/2023/2023-04-27/VOLUNTEERS%40BOINC.txt - in case someone was wondering if everything works correctly.
86) Message boards : Number crunching : Can't get any tasks. (Message 1657)
Posted 1 Apr 2023 by Sergei Chernykh
Post:
I checked a few of your abandoned tasks, and they all were abandoned because they were already completed by two other participants before you finished them.
87) Message boards : Number crunching : Can't get any tasks. (Message 1656)
Posted 1 Apr 2023 by Sergei Chernykh
Post:
It should work fine on Windows, you can see here that most of the computing power comes from Windows GPU applications.
88) Message boards : Bug tracker : No known hosts (Message 1642)
Posted 21 Jan 2023 by Sergei Chernykh
Post:
Old inactive hosts get automatically removed from the database.
89) Message boards : Number crunching : No new amicable pairs (Message 1638)
Posted 4 Jan 2023 by Sergei Chernykh
Post:
https://sech.me/boinc/Amicable/forum_thread.php?id=218&postid=1483#1483
90) Message boards : Number crunching : very fast integrated gpu? (Message 1625)
Posted 11 Oct 2022 by Sergei Chernykh
Post:
This computer has too many invalid results, either because it's running faulty GPU drivers, or because it's intentionally trying to get more credit points. I have an automated script that bans hosts with too many invalid results, but it was turned off. It's turned on again now.

Edit: this is the only host that was banned by the script ( > 3 invalid results in the last week, or > 10 inconclusive results in the last 2 days).
91) Message boards : Random stuff : can't find my Team (Message 1600)
Posted 10 Jul 2022 by Sergei Chernykh
Post:
There's no such team in the database here. Did you try https://sech.me/boinc/Amicable/team_create_form.php?
92) Message boards : Number crunching : Um, Got a Couple of Whoppers? (Message 1589)
Posted 26 Mar 2022 by Sergei Chernykh
Post:
This is temporary, the project is processing the last of 23*13*... numbers where there are more numbers to check per each task. The 23*11k*... range will start soon.
93) Message boards : Number crunching : No new amicable pairs found in 200 WU's. Anyone else? (Message 1573)
Posted 8 Dec 2021 by Sergei Chernykh
Post:
Pairs found each day are listed here: https://sech.me/ap/log/2021/
And the main page is here: https://sech.me/ap/index.html
As far as I can see, you found 9 pairs in 2021 so far.
94) Message boards : Getting started : Unable to add Amicable Numbers project (Message 1546)
Posted 1 Oct 2021 by Sergei Chernykh
Post:
BOINC clients had a problem with site's SSL certificate. I've updated it, so it should work now. Can you try again?
95) Message boards : Number crunching : Unable to upload results (Message 1545)
Posted 1 Oct 2021 by Sergei Chernykh
Post:
It was the problem with site's certificate. Can you try again?
96) Message boards : Bug tracker : Upload server is down (Message 1544)
Posted 1 Oct 2021 by Sergei Chernykh
Post:
I've updated site's SSL certificate to the one that should work according to https://boinc.berkeley.edu/forum_thread.php?id=14413&postid=105557#105557
97) Message boards : Bug tracker : Upload server is down (Message 1542)
Posted 30 Sep 2021 by Sergei Chernykh
Post:
It looks like it's a certificate problem on BOINC client side: https://boinc.berkeley.edu/forum_thread.php?id=14413
BOINC client needs to update ca-bundle.crt
98) Message boards : Number crunching : Um, Got a Couple of Whoppers? (Message 1531)
Posted 18 Jul 2021 by Sergei Chernykh
Post:
If it runs for too long, you can abort it. I'll split all huge tasks into smaller ones and reissue them.
99) Message boards : Number crunching : Um, Got a Couple of Whoppers? (Message 1521)
Posted 10 Jun 2021 by Sergei Chernykh
Post:
Unfortunately there's no way to detect such long tasks until they are actually run. Part of the filtering includes trial division of the larger number in a pair and it can be significantly slower sometimes if many numbers in the range don't have small factors. The range is set for the smaller number in a pair so it's impossible to know in advance what prime factors will be in the larger number.
100) Message boards : Number crunching : Anyone Else Hit A Lull In Finding Amicable Numbers? (Message 1483)
Posted 27 Dec 2020 by Sergei Chernykh
Post:
It depends on current search range of numbers. Some ranges are rich with new numbers, some others don't have them at all.


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