mfaktc: a CUDA program for Mersenne prefactoring - Page 109

Christenson · 2011-09-10, 02:32

Mr Cheesehead, I don't think you got my meaning.

I was asking how to navigate to it, assuming I didn't know about it from your nice post above. That is, what page(s) besides this thread, have your link on them? (not that it's really needed, given the wiki page, which is the answer I was looking for.)

TheJudger · 2011-09-10, 11:28

I don't know other pages than this thread and the mfaktc article in the mersennewiki.
The directory www.mersenneforum.org/mfaktc/ is quiet new, not so long ago I've ask Xyzzy if he would be so nice and host the files. I've ask him because he is allready operating the (semi-)official mirror of the GIMPS software www.mersenneforum.org/gimps/. He was so nice to add another directory for mfaktc. I won't attach new releases here in the forum from now, instead I'll just post links. An advantage is that I'm no longer limited to the maximum attachment size here in the forum so I can easily bundle the CUDA library files. So we have to say: thank you, Xyzzy!

Oliver

Christenson · 2011-09-10, 12:18

Hey, is there any reason we can't get mfaktc, mfakto, and CUDALucas all linked in the same way under the GPU Computing subheader? Or a short mersennewiki page made with the list of GPU programs linking things, and a link to that under the GPU computing header?

Indeed, thank you XYZZY...

Rodrigo · 2011-09-11, 15:38

Quote:

Originally Posted by Christenson

Hey, is there any reason we can't get mfaktc, mfakto, and CUDALucas all linked in the same way under the GPU Computing subheader? Or a short mersennewiki page made with the list of GPU programs linking things, and a link to that under the GPU computing header?

This week I obtained a mersennewiki account to start working on a GPU computing page(s). First, though, I need to learn how to use the wiki and also look around so that I don't end up duplicating someone else's effort or stepping on their toes.

One of the many things I'd do on such a page would be to list all the GPU programs (and link to their pages, of course).

If a GPU Computing page already exists, please let me know and send a link -- thanks!

Rodrigo

Christenson · 2011-09-11, 16:53

Let me make my suggestion explicit, then:
This subforum gets a link to Rodrigo's page at the top...Rodrigo's page then links to the pages for each of the GPU programs....
Thanks, Rodrigo...I don't think there are any toes to be stepped on here!

cheesehead · 2011-09-13, 08:24

Quote:

Originally Posted by Christenson

I was asking how to navigate to it, assuming I didn't know about it from your nice post above. That is, what page(s) besides this thread, have your link on them?

Oh, I'm sorry I missed that point. :-(

Dubslow · 2011-09-14, 17:12

Turns out Ubuntu doesn't have dos2unix etc., but I wound up using a sed command to get the job done (taken from Wikipedia, of course). The problem now is getting the affinity to work. I'm using the command taskset, and I'm pretty sure the affinity is being set properly, but either way my candidate rate cuts in half whenever I run three MPrime workers alongside mfaktc, even though they're on separate cores. I haven't had this problem in Windows.

Christenson · 2011-09-14, 22:39

mfaktc, at present, thinks it is single-threaded, and relies upon you to set both it's priority and it's core.

Dubslow · 2011-09-15, 03:28

With MPrime off, mfaktc runs totally on logical 7, gets an avg. rate of 180-185, and avg. wait of 100-100 us.
When I run MPrime on 1-6 (which order I start them doesn't matter) mfaktc runs on 7 or 8 (as I set it to) but only gets an avg. rate around 90-100, with avg. wait < 100.
They both run with the same Sieve Prime setting. (And auto-adjusting is on.)
This does not occur in Windows. With the same affinities and Prime95 running 1-6, I still get around 165-170 with mfaktc.

Christenson · 2011-09-15, 05:07

wait a minute...are you sure that logical 7 and 8 on your machine are in fact on one core? Surely you don't have 8 physical cores, do you?

Xyzzy · 2011-09-15, 13:04

Quote:

Turns out Ubuntu doesn't have dos2unix…

Code:

$ apt-cache show dos2unix
Package: dos2unix
Priority: extra
Section: universe/text
Installed-Size: 232
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Original-Maintainer: Jari Aalto <jari.aalto@cante.net>
Architecture: amd64
Version: 5.1.1-2
Depends: libc6 (>= 2.4)
Conflicts: tofrodos (<< 1.7.8.debian.1)
Filename: pool/universe/d/dos2unix/dos2unix_5.1.1-2_amd64.deb
Size: 41770
MD5sum: d5971308a00e5449b2d8143af4ee2a92
SHA1: 9c6683d79f45a7507cef9fd67674a295dedd21a0
SHA256: 48eb2b15691a8e9ee6cc0e16c1fe3bcd764786d29ef2231b7a8a029a8466eb60
Description: convert text file line endings between CRLF and LF
 This package contains utilities dos2unix, unix2dos, mac2unix,
 unix2mac to convert the line endings of text files between UNIX (LF),
 DOS (CRLF) and Mac (CR) formats.
 .
 Text files under Windows and DOS typically have two ASCII characters
 at the end of each line: CR (carriage return) followed by LF (line
 feed). Older Macs used just CR, while UNIX uses just LF. While most
 modern editors can read all these formats, there may still be a need
 to convert files between them.
 .
 This is the classic utility developed in 1989.
Homepage: http://freshmeat.net/projects/dos2unix
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
mfakto: an OpenCL program for Mersenne prefactoring	Bdot	GPU Computing	1676	2021-06-30 21:23
The P-1 factoring CUDA program	firejuggler	GPU Computing	753	2020-12-12 18:07
gr-mfaktc: a CUDA program for generalized repunits prefactoring	MrRepunit	GPU Computing	32	2020-11-11 19:56
mfaktc 0.21 - CUDA runtime wrong	keisentraut	Software	2	2020-08-18 07:03
World's second-dumbest CUDA program	fivemack	Programming	112	2015-02-12 22:51

2011-09-10, 02:32	#1189
Christenson Dec 2010 Monticello 5·359 Posts	Mr Cheesehead, I don't think you got my meaning. I was asking how to navigate to it, assuming I didn't know about it from your nice post above. That is, what page(s) besides this thread, have your link on them? (not that it's really needed, given the wiki page, which is the answer I was looking for.)

2011-09-10, 11:28	#1190
TheJudger "Oliver" Mar 2005 Germany 10001010111₂ Posts	I don't know other pages than this thread and the mfaktc article in the mersennewiki. The directory www.mersenneforum.org/mfaktc/ is quiet new, not so long ago I've ask Xyzzy if he would be so nice and host the files. I've ask him because he is allready operating the (semi-)official mirror of the GIMPS software www.mersenneforum.org/gimps/. He was so nice to add another directory for mfaktc. I won't attach new releases here in the forum from now, instead I'll just post links. An advantage is that I'm no longer limited to the maximum attachment size here in the forum so I can easily bundle the CUDA library files. So we have to say: thank you, Xyzzy! Oliver

2011-09-10, 12:18	#1191
Christenson Dec 2010 Monticello 5×359 Posts	Hey, is there any reason we can't get mfaktc, mfakto, and CUDALucas all linked in the same way under the GPU Computing subheader? Or a short mersennewiki page made with the list of GPU programs linking things, and a link to that under the GPU computing header? Indeed, thank you XYZZY...

2011-09-11, 16:53	#1193
Christenson Dec 2010 Monticello 5·359 Posts	Let me make my suggestion explicit, then: This subforum gets a link to Rodrigo's page at the top...Rodrigo's page then links to the pages for each of the GPU programs.... Thanks, Rodrigo...I don't think there are any toes to be stepped on here!

2011-09-14, 17:12	#1195
Dubslow Basketry That Evening! "Bunslow the Bold" Jun 2011 40<A<43 -89<O<-88 16065₈ Posts	Turns out Ubuntu doesn't have dos2unix etc., but I wound up using a sed command to get the job done (taken from Wikipedia, of course). The problem now is getting the affinity to work. I'm using the command taskset, and I'm pretty sure the affinity is being set properly, but either way my candidate rate cuts in half whenever I run three MPrime workers alongside mfaktc, even though they're on separate cores. I haven't had this problem in Windows.

2011-09-14, 22:39	#1196
Christenson Dec 2010 Monticello 5×359 Posts	mfaktc, at present, thinks it is single-threaded, and relies upon you to set both it's priority and it's core.

2011-09-15, 03:28	#1197
Dubslow Basketry That Evening! "Bunslow the Bold" Jun 2011 40<A<43 -89<O<-88 16065₈ Posts	With MPrime off, mfaktc runs totally on logical 7, gets an avg. rate of 180-185, and avg. wait of 100-100 us. When I run MPrime on 1-6 (which order I start them doesn't matter) mfaktc runs on 7 or 8 (as I set it to) but only gets an avg. rate around 90-100, with avg. wait < 100. They both run with the same Sieve Prime setting. (And auto-adjusting is on.) This does not occur in Windows. With the same affinities and Prime95 running 1-6, I still get around 165-170 with mfaktc.

2011-09-15, 05:07	#1198
Christenson Dec 2010 Monticello 5·359 Posts	wait a minute...are you sure that logical 7 and 8 on your machine are in fact on one core? Surely you don't have 8 physical cores, do you?