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Message boards : Sieving : New and Improved Sieving

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rogue
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Message 119049 - Posted: 26 Jun 2018 | 17:06:43 UTC

gcwsieve is now part of the mtsieve framework. You can read about the update here: http://www.mersenneforum.org/showpost.php?p=490541&postcount=57. This version of gcwsieve supports mixed CPU and GPU sieving. In other words, gcwsievecl has been merged into gcwsieve.

fpsieve is now called fsieve (factorial sieve) is also in the framework and supports CPU and GPU. Once I get the AVX logic into fsieve, the CPU threads should get a nice speed bump over the current CPU only fpsieve.

The primorial sieve piece of fpsieve is not in the framework yet, but should be easy to add. When it is added it will have AVX logic out of the box. psieve will not have GPU support. I tried porting a few years ago but the performance is terrible.

The mtsieve framework is described here: http://mersenneforum.org/rogue/mtsieve.html.

If you have any questions, concerns, comments, etc, please post here or e-mail me.

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Found 1 prime in the 2018 Tour de Primes321 LLR Bronze: Earned 10,000 credits (53,871)Cullen LLR Bronze: Earned 10,000 credits (15,017)ESP LLR Bronze: Earned 10,000 credits (62,595)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (21,984)PPS LLR Silver: Earned 100,000 credits (136,702)PSP LLR Bronze: Earned 10,000 credits (47,301)SoB LLR Silver: Earned 100,000 credits (305,770)SR5 LLR Bronze: Earned 10,000 credits (18,306)SGS LLR Bronze: Earned 10,000 credits (14,608)TRP LLR Silver: Earned 100,000 credits (282,537)Woodall LLR Bronze: Earned 10,000 credits (33,562)321 Sieve Gold: Earned 500,000 credits (865,427)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,397,311)PPS Sieve Ruby: Earned 2,000,000 credits (2,349,587)AP 26/27 Amethyst: Earned 1,000,000 credits (1,475,695)GFN Ruby: Earned 2,000,000 credits (2,056,798)PSA Silver: Earned 100,000 credits (286,377)
Message 119074 - Posted: 27 Jun 2018 | 23:12:26 UTC - in response to Message 119049.

So, from what I gathered this version now supports multithreading and GPU computing, nice!

Is it possible to start testing it through anonymous platform or are there too many changes?
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de PrimesFound 1 prime in the 2020 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,822,730)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Turquoise: Earned 5,000,000 credits (5,009,577)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Jade: Earned 10,000,000 credits (13,316,582)PSP LLR Turquoise: Earned 5,000,000 credits (5,197,957)SoB LLR Sapphire: Earned 20,000,000 credits (34,291,181)SR5 LLR Jade: Earned 10,000,000 credits (10,007,110)SGS LLR Ruby: Earned 2,000,000 credits (2,276,330)TRP LLR Ruby: Earned 2,000,000 credits (4,414,012)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Jade: Earned 10,000,000 credits (10,061,196)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (22,885,121)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Jade: Earned 10,000,000 credits (10,118,303)GFN Emerald: Earned 50,000,000 credits (72,607,747)PSA Jade: Earned 10,000,000 credits (12,445,029)
Message 119075 - Posted: 27 Jun 2018 | 23:34:58 UTC - in response to Message 119074.

Is it possible to start testing it through anonymous platform or are there too many changes?


I assume you are referring to gcw sieve? That project is close to being suspended since we're approaching optimal sieving depth, as such, we currently have no plans for Mark's new sieve apps.

We have not tested it.

Mark didn't say anything about it being compatible with BOINC.

There's a few other hoops that need to be jumped through before it could be integrated here.

So, no, you can't use it with app_info.xml at this time. (As far as I know, anyway.)

That being said...

A GPU version of the GCW sieve should be a lot faster than the CPU sieve, right? That will mean the "optimal sieving depth", when using a GPU sieve, will probably be much higher. That, in turn means that we've still got a lot more sieving to do on GCW. It's not unreasonable to think that we'll take a look into this at some point. We haven't even started talking about it yet, however. We only found out about it yesterday.
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Message 119542 - Posted: 21 Jul 2018 | 21:47:48 UTC

I have incorporated a primorial sieve (called psieve) into the framework. It supports AVX out of the box and is about 30% faster than fpsieve.

Gabriel LignelliProject donor
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Message 119544 - Posted: 22 Jul 2018 | 0:22:11 UTC - in response to Message 119542.

I have incorporated a primorial sieve (called psieve) into the framework. It supports AVX out of the box and is about 30% faster than fpsieve.

I take it you haven't yet included a binary for psieve in the mtsieve_1.7.7z archive, is that correct?
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Message 119556 - Posted: 22 Jul 2018 | 20:57:27 UTC - in response to Message 119544.

I have incorporated a primorial sieve (called psieve) into the framework. It supports AVX out of the box and is about 30% faster than fpsieve.

I take it you haven't yet included a binary for psieve in the mtsieve_1.7.7z archive, is that correct?


Oops. psieve was not included when building all of the other binaries. I have updated the 7z file.

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Message 119568 - Posted: 23 Jul 2018 | 14:06:58 UTC

psieve instantly crashes when running it with:

D:\sieving\psieve>psieve.exe -p 8151000000000 -P 8152000000000 -n 2500009 -N 9999991 psieve v1.1, a program to find factors of primorial Sieve started: 8151e9 < p < 8152e9 with 963014 terms D:\sieving\psieve>


And exits without running when specifying the psieve_9T.txt file:

D:\sieving\psieve>psieve.exe -p 8151000000000 -P 8152000000000 -i psieve_9T.txt psieve v1.1, a program to find factors of primorial Fatal Error: Line 1 is malformed in input file psieve_9T.txt D:\sieving\psieve>


specs: AMD FX-6300, Windows 10 1607
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Message 119569 - Posted: 23 Jul 2018 | 14:44:21 UTC - in response to Message 119568.
Last modified: 23 Jul 2018 | 15:03:23 UTC

psieve instantly crashes when running it with:

D:\sieving\psieve>psieve.exe -p 8151000000000 -P 8152000000000 -n 2500009 -N 9999991 psieve v1.1, a program to find factors of primorial Sieve started: 8151e9 < p < 8152e9 with 963014 terms D:\sieving\psieve>


And exits without running when specifying the psieve_9T.txt file:


Exactly. How do you expect it to run without a sieve file when you didn't specify a min and max n value? Where is it supposed to search?

D:\sieving\psieve>psieve.exe -p 8151000000000 -P 8152000000000 -i psieve_9T.txt psieve v1.1, a program to find factors of primorial Fatal Error: Line 1 is malformed in input file psieve_9T.txt D:\sieving\psieve>


specs: AMD FX-6300, Windows 10 1607


It doesn't like the sieve file. Remove the "+" from the header line. It'll probably crash in a few seconds after that (it did for me) but at least it'll read the sieve file properly. And running an already-searched range should never find anything - those candidates were already removed from the sieve. I've emailed rogue with specifics on the crash I got.

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Found 1 prime in the 2018 Tour de Primes321 LLR Bronze: Earned 10,000 credits (53,871)Cullen LLR Bronze: Earned 10,000 credits (15,017)ESP LLR Bronze: Earned 10,000 credits (62,595)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (21,984)PPS LLR Silver: Earned 100,000 credits (136,702)PSP LLR Bronze: Earned 10,000 credits (47,301)SoB LLR Silver: Earned 100,000 credits (305,770)SR5 LLR Bronze: Earned 10,000 credits (18,306)SGS LLR Bronze: Earned 10,000 credits (14,608)TRP LLR Silver: Earned 100,000 credits (282,537)Woodall LLR Bronze: Earned 10,000 credits (33,562)321 Sieve Gold: Earned 500,000 credits (865,427)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,397,311)PPS Sieve Ruby: Earned 2,000,000 credits (2,349,587)AP 26/27 Amethyst: Earned 1,000,000 credits (1,475,695)GFN Ruby: Earned 2,000,000 credits (2,056,798)PSA Silver: Earned 100,000 credits (286,377)
Message 119571 - Posted: 23 Jul 2018 | 16:03:23 UTC - in response to Message 119569.

Exactly. How do you expect it to run without a sieve file when you didn't specify a min and max n value? Where is it supposed to search?

I thought the -n and -N parameters are what specify the min and max n values, at least that's what I understood from the documentation. How do I specify those values instead?

It doesn't like the sieve file. Remove the "+" from the header line. It'll probably crash in a few seconds after that (it did for me) but at least it'll read the sieve file properly. And running an already-searched range should never find anything - those candidates were already removed from the sieve. I've emailed rogue with specifics on the crash I got.

Ok, I did that and now it does seem to have read the sieve file, outputting "Sieve started: 8151e9 < p < 8152e9 with 502790 terms". However, it does still crash right after that. As per running an already sieved range, it was just some values I found on the manual sieving page that I knew would (should) already work with fpsieve.
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Message 119572 - Posted: 23 Jul 2018 | 16:44:24 UTC - in response to Message 119571.

I thought the -n and -N parameters are what specify the min and max n values, at least that's what I understood from the documentation. How do I specify those values instead?


My mistake. I completely missed the -n and -N on the command line. I ran a short initial sieve here and it worked for me, but it was done in less than a second. That's how I knew what it wanted in the sieve file (I had it output a new sieve file).

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Message 119584 - Posted: 24 Jul 2018 | 14:00:18 UTC

I will address the use of the "+" on the ABC line. It will be optional in the next build. It is completely unnecessary as long as each subsequent line has a "+" or "-" on it.

Note that psieve uses scientific notation for numeric inputs. -p1e6 is the same as -p1000000. It does not support the G or T suffix on input which were supported by fpsieve.

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Message 119586 - Posted: 24 Jul 2018 | 15:26:29 UTC - in response to Message 119584.

I will address the use of the "+" on the ABC line. It will be optional in the next build. It is completely unnecessary as long as each subsequent line has a "+" or "-" on it.

Note that psieve uses scientific notation for numeric inputs. -p1e6 is the same as -p1000000. It does not support the G or T suffix on input which were supported by fpsieve.


Sorry I was mistaken. It does support a G or T suffix on those parameters. I missed that because it was really old code and I never use those suffixes.

I'm working with Jim to find the cause behind a psieve crash on Windows 7.

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Message 119617 - Posted: 26 Jul 2018 | 21:45:55 UTC - in response to Message 119586.

I fixed the crash that Jim ran into. It only happens if running on a machine that doesn't support either AVX or FMA instructions.

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Message 119789 - Posted: 8 Aug 2018 | 14:52:03 UTC

I get an error when trying to run psieve (mtsieve 1.7.3) on a laptop with no dedicated graphics chip. i5-3317U, Windows 10 (1607). fpsieve works fine on this machine.
____________

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Message 119813 - Posted: 9 Aug 2018 | 20:04:13 UTC - in response to Message 119789.
Last modified: 9 Aug 2018 | 20:04:27 UTC

I get an error when trying to run psieve (mtsieve 1.7.3) on a laptop with no dedicated graphics chip. i5-3317U, Windows 10 (1607). fpsieve works fine on this machine.


Please send me (via e-mail) the command line arguments used, the output it writes to the command line, and any input files you are using. Please use 7-zip to zip up input files and attach them.

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Message 119863 - Posted: 11 Aug 2018 | 1:35:45 UTC

I have posted mtsieve 1.7.4. The most notable improvement is that mfsieve now supports AVX (but not AVX512 yet) and is about 40% faster than the previous release of mfsieve. Note that is only comparing CPU-only code.

I have not been provided the files I have asked for, so the issue reported by Gabriel probably still exists.

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Found 1 prime in the 2018 Tour de Primes321 LLR Bronze: Earned 10,000 credits (53,871)Cullen LLR Bronze: Earned 10,000 credits (15,017)ESP LLR Bronze: Earned 10,000 credits (62,595)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (21,984)PPS LLR Silver: Earned 100,000 credits (136,702)PSP LLR Bronze: Earned 10,000 credits (47,301)SoB LLR Silver: Earned 100,000 credits (305,770)SR5 LLR Bronze: Earned 10,000 credits (18,306)SGS LLR Bronze: Earned 10,000 credits (14,608)TRP LLR Silver: Earned 100,000 credits (282,537)Woodall LLR Bronze: Earned 10,000 credits (33,562)321 Sieve Gold: Earned 500,000 credits (865,427)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,397,311)PPS Sieve Ruby: Earned 2,000,000 credits (2,349,587)AP 26/27 Amethyst: Earned 1,000,000 credits (1,475,695)GFN Ruby: Earned 2,000,000 credits (2,056,798)PSA Silver: Earned 100,000 credits (286,377)
Message 119873 - Posted: 11 Aug 2018 | 13:37:20 UTC - in response to Message 119863.

I have not been provided the files I have asked for, so the issue reported by Gabriel probably still exists.

I searched for your email address for a bit but couldn't find it. The matter is that just running psieve.exe with no arguments or with whichever arguments makes it crash in the way shown in the picture https://i.imgur.com/7u3nxH5.png, with no output to the command line what so ever. I am away from that machine right now, but I am pretty confident the issue still exists with 1.7.4, since it has existed since 1.7.
____________

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Message 119895 - Posted: 12 Aug 2018 | 13:40:04 UTC - in response to Message 119873.

I have not been provided the files I have asked for, so the issue reported by Gabriel probably still exists.

I searched for your email address for a bit but couldn't find it. The matter is that just running psieve.exe with no arguments or with whichever arguments makes it crash in the way shown in the picture https://i.imgur.com/7u3nxH5.png, with no output to the command line what so ever. I am away from that machine right now, but I am pretty confident the issue still exists with 1.7.4, since it has existed since 1.7.


I thought my e-mail was on the mtsieve page. You can contact me at rogue at wi.rr.com.

That error is odd. It seems to be failing trying to determine if you have GPU support. Do you get errors when you try to run it properly?

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Message 120129 - Posted: 24 Aug 2018 | 17:32:06 UTC - in response to Message 119895.

Actually I think the issue is that you have an outdated video driver. Please install the latest video driver to see if that solves the problem.

Message boards : Sieving : New and Improved Sieving

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