P3 TF time - Page 3

nfortino · 2003-12-14, 23:00

I was just about to apologize after re-reading the undoc entry. Sorry.

Complex33 · 2003-12-20, 02:18

Ok I ran an experiment using the FactorOverride=n switch with the V4 server. The procedure I used allows a machine to factor to a specific bit depth, return the results and "un-stick" the exponents with a little manual work. I also verified that the server has an updated bit depth for the said exponents when assigning them to other factoring accounts. I'd post the procedure but I'm not sure how it would be received by the powers that be. Anyone want to condone this?

PrimeCruncher · 2003-12-20, 02:52

Well, the point of doing that would be to get non-SSE2 CPUs to factor only through 2^64, would it not? This procedure would be a lot of work for miniscule amounts of credit. You could post the procedure but I doubt many people would use it. I, for one, will not.

sdbardwick · 2003-12-20, 05:40

Complex33:
I'd be interested, depending on the amount of intevention required to make sure the exponents are 'un-stuck'. If it can be done in a semi-automated batch process I'd love to do the initial step on my various Athlons so P4s can be used in the most efficient manner.

Obviously, I would only take this course of action if it does not cause problems with the server, and George and Scott don't object. I seem to recall there being some discussion that the next version of the server would allow for this degree of granularity in assigning TF work.

GP2 · 2003-12-20, 15:31

If you look at http://www.mersenne.org/primenet, you don't see stuck exponents any more. I think Scott made a recent change to automatically handle them.

Of course you do see the daily expiries, which sometimes take hours to clear, but that's not the same as permanently stuck exponents.

garo · 2003-12-20, 20:00

The problem with this procedure - which was verified by trif and myself about a year ago - is that these exponents will become stuck again when the time comes to release them for LL testing. And if any of the exponents expire they are likely to become stuck as well. Primenet had huge gobs of stuck exponents until recently that rendered the summary page a not so pretty sight.

Therefore, we decided it is not worth the hassle and the screw-up on Primenet.

garo · 2003-12-20, 20:12

Oops! i did not read GP2's message before posting and forgot about the change Scott made. Hopefully, that takes care of our past concerns. I'd be interested to see if someone can verify that Scott's new mechanisms "unsticks" all stuck exponents successfully.

Complex33 · 2003-12-21, 04:46

When running the expierment TF exponents were stuck after sending in lower than normal factoring bit depths. I had to manually un-stick them and then release them.

garo · 2003-12-21, 05:26

Yeah but Scott's unstick routine runs at 0600 UTC everyday. So leave a few stuck and come back the next day to see if they got unstuck.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Time to End	davar55	Lounge	4	2013-02-23 02:40
P95 est time to go seems off	bcp19	Software	1	2012-08-03 22:39
How much time	Unregistered	Information & Answers	4	2008-12-20 21:00
New .dat time?	benjackson	Prime Sierpinski Project	16	2008-07-29 07:26
Time	Xyzzy	Science & Technology	26	2008-01-19 03:28

2003-12-14, 23:00	#23
nfortino Nov 2003 3×5×11 Posts	I was just about to apologize after re-reading the undoc entry. Sorry.

2003-12-20, 02:18	#24
Complex33 Aug 2002 Texas 5×31 Posts	Ok I ran an experiment using the FactorOverride=n switch with the V4 server. The procedure I used allows a machine to factor to a specific bit depth, return the results and "un-stick" the exponents with a little manual work. I also verified that the server has an updated bit depth for the said exponents when assigning them to other factoring accounts. I'd post the procedure but I'm not sure how it would be received by the powers that be. Anyone want to condone this?

2003-12-20, 02:52	#25
PrimeCruncher Sep 2003 Borg HQ, Delta Quadrant 2×3³×13 Posts	Well, the point of doing that would be to get non-SSE2 CPUs to factor only through 2^64, would it not? This procedure would be a lot of work for miniscule amounts of credit. You could post the procedure but I doubt many people would use it. I, for one, will not.

2003-12-20, 05:40	#26
sdbardwick Aug 2002 North San Diego County 1255₈ Posts	Complex33: I'd be interested, depending on the amount of intevention required to make sure the exponents are 'un-stuck'. If it can be done in a semi-automated batch process I'd love to do the initial step on my various Athlons so P4s can be used in the most efficient manner. Obviously, I would only take this course of action if it does not cause problems with the server, and George and Scott don't object. I seem to recall there being some discussion that the next version of the server would allow for this degree of granularity in assigning TF work.

2003-12-20, 15:31	#27
GP2 Sep 2003 101000011001₂ Posts	If you look at http://www.mersenne.org/primenet, you don't see stuck exponents any more. I think Scott made a recent change to automatically handle them. Of course you do see the daily expiries, which sometimes take hours to clear, but that's not the same as permanently stuck exponents.

2003-12-20, 20:00	#28
garo Aug 2002 Termonfeckin, IE 5314₈ Posts	The problem with this procedure - which was verified by trif and myself about a year ago - is that these exponents will become stuck again when the time comes to release them for LL testing. And if any of the exponents expire they are likely to become stuck as well. Primenet had huge gobs of stuck exponents until recently that rendered the summary page a not so pretty sight. Therefore, we decided it is not worth the hassle and the screw-up on Primenet.

2003-12-20, 20:12	#29
garo Aug 2002 Termonfeckin, IE 101011001100₂ Posts	Oops! i did not read GP2's message before posting and forgot about the change Scott made. Hopefully, that takes care of our past concerns. I'd be interested to see if someone can verify that Scott's new mechanisms "unsticks" all stuck exponents successfully.

2003-12-21, 04:46	#30
Complex33 Aug 2002 Texas 9B₁₆ Posts	When running the expierment TF exponents were stuck after sending in lower than normal factoring bit depths. I had to manually un-stick them and then release them.

2003-12-21, 05:26	#31
garo Aug 2002 Termonfeckin, IE ACC₁₆ Posts	Yeah but Scott's unstick routine runs at 0600 UTC everyday. So leave a few stuck and come back the next day to see if they got unstuck.