Mersenne: Exponent already tested?
I've been working on a large exponent for a while that I got from Primenet. A while ago I started getting messages like this: Sending expected completion date for M33469273: Jan 28 2004 ERROR 11: Exponent already tested. Does this mean that I was poached? Will I still get credit if/when I complete the exponent? -- [EMAIL PROTECTED] - HMC UNIX Systems Manager My opinions are my own and probably don't represent anything anyway. _ Unsubscribe list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: Old files in my mprime dirs
Brian J. Beesley wrote: On Sunday 30 March 2003 21:04, you wrote: I've been running mprime on Linux for a bit less than 2 years now. I was looking at the directory on one box and found some ancient files: mE013037.001 mF320219.001 These are from a dual CPU box. The leading m suggests they're from factoring but but file sizes are 3.5 to 3.9 MB. There's been a database Very probably P-1 factoring... With a dual CPU box if you're doing P-1 on both CPUs at once you get such a file on the mprime -B -A1 process. It's just happened to me again. I checked my old prim*.log files and all those exponents were turned in. -- [EMAIL PROTECTED] - HMC UNIX Systems Manager _ Unsubscribe list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Mersenne: Primenet sorta down?
None of my mprime machines have been able to check in with Primenet for the past 16 hours. Is it me or is there a problem? -- [EMAIL PROTECTED] - HMC UNIX Systems Manager _ Unsubscribe list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: P-1 on PIII or P4?
Daran wrote: I'd appreciate it if you or someone else could try starting a P-1 on the same exponent (not in one of the ranges where it would get a different FFT length) on two different machines, with the same memory allowed. P4: M8769809 completed P-1, B1=45000, B2=72, E=12, WY2: E2F4FF67 Memory allowed: 896MB (Machine has 1GB) PIII: M8769809 completed P-1, B1=45000, B2=72, E=12, WY2: E2F4FF67 Memory allowed: 990MB (Machine has 1 1/8GB) -- [EMAIL PROTECTED] - HMC UNIX Systems Manager _ Unsubscribe list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: P-1 on PIII or P4?
Daran wrote: On Thu, Mar 06, 2003 at 08:12:31PM -0800, Chris Marble wrote: Daran wrote: Whichever machine you choose for P-1, always give it absolutely as much memory as you can without thrashing. There is an upper limit to how much it will use, but this is probably in the gigabytes for exponents in even the current DC range. So I should use the PIII with 1 3/4 GB of RAM to do nothing but P-1. This depends upon what it is you want to maximise. If it's your effective contribution to the project, then yes. I like my stats but I could certainly devote 1 machine out of 20 to this. Assume I've got 1GB of RAM. Do the higher B2s mean I should use a P4 rather than a P3 for this task? Unfortunately, pure P-1 work is not supported by the Primenet server, so requires a lot of ongoing administration by the user. Alternatively, if the server is currently making assignments in your desired range, then you could obtain them by setting 'Always have this many days of work queued up' to 90 days - manual communication to get some exponents - cut and past from worktodo.ini to a worktodo.saved file - manual communication to get some more - cut and past - etc. This is what I do. The result of this will be a worktodo.saved file with a lot of entries that look like this DoubleCheck=8744819,64,0 DoubleCheck=8774009,64,1 ... (or 'Test=...' etc.) Now copy some of these back to your worktodo.ini file, delete every entry ending in a 1 (These ones are already P-1 complete), change 'DoubleCheck=' or 'Test=' into 'Pfactor=', and change the 0 at the end to a 1 if the assignment was a 'DoubleCheck'. Would I unreserve all the exponents that are already P-1 complete? If I don't change the DoubleCheck into Pfactor then couldn't I just let the exponent run and then sometime after P-1 is done move the entry and the 2 tmp files over to another machine to finish it off? If you're willing to do all this, then there's another optimisation you might consider. Since it's only stage 2 that requires the memory, you could devote your best machine(s) to this task, using your other boxes to feed them by doing stage 1. That sounds like more work than I care to do. I can see having 1 machine do P-1 on lots of double-checks. A couple of other points: You are limited in the CPU menu option to 90% of physical memory, but this may be overridden by editing local.ini, where you can set available memory to physical memory less 8MB. As an mprime user I edit the local.ini file all the time. Per your notes I upped *Memory to 466. -- [EMAIL PROTECTED] - HMC UNIX Systems Manager _ Unsubscribe list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: P-1 on PIII or P4?
Daran wrote: Whichever machine you choose for P-1, always give it absolutely as much memory as you can without thrashing. There is an upper limit to how much it will use, but this is probably in the gigabytes for exponents in even the current DC range. So I should use the PIII with 1 3/4 GB of RAM to do nothing but P-1. It's an older Xeon with 2MB cache. Will that help too? How would I do this? I see the following in undoc.txt: You can do P-1 factoring by adding lines to worktodo.ini: Pfactor=exponent,how_far_factored,has_been_LL_tested_once For example, Pfactor=1157,64,0 There are a number of ranges of exponent sizes where it is better to avoid using P4s. George posted the following table some time ago (Best viewed with a fixed width font.) FFT v21 v22.8v21 SSE2 v22.8 SSE2 262144 5255000 5255000 5185000 5158000 327680 652 6545000 6465000 6421000 393216 776 7779000 769 7651000 458752 904 9071000 897 8908000 524288 1033 1038 1024 1018 655360 1283 1289 1272 1265 786432 1530 1534 1516 1507 917504 1785 1789 1766 1755 1048576 2040 2046 2018 2005 1310720 2535 2539 2509 2493 1572864 3015 3019 2992 2969 1835008 3510 3520 3486 3456 2097152 4025 4030 3978 3950 2621440 5000 5002 4935 4910 3145728 5940 5951 5892 5852 3670016 6910 6936 6865 6813 4194304 7930 7930 7836 7791 If you are testing an exponent which is greater than an entry in the fifth column, but less than the corresponding entry int the third column, then avoid using a P4. This applies to all types of work. Useful info. I've got 2 DCs in one of the ranges but one computer's a PIII and the other's a Dec Alpha running Mlucas-2.7b-gen-5x. -- [EMAIL PROTECTED] - HMC UNIX Systems Manager _ Unsubscribe list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Mersenne: P-1 on PIII or P4?
I've got a couple of P4s that I can use on weekends. I've been using them to finish off exponents that my PIIIs were working on. Is that the right order? P-1 on the PIII and then the rest on the P4. I want to maximize my output. -- [EMAIL PROTECTED] - HMC UNIX Systems Manager My opinions are my own and probably don't represent anything anyway. _ Unsubscribe list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Mersenne: Linux kernels
Steinar H. Gunderson wrote: Actually, in newer Linux kernels (ie. at least all 2.4.x versions that I can remember) you can expand this further, up to 64GB on CPUs that support it (which is, AFAIK, Pentium Pro and newer, so in reality it won't be a problem). I don't really know what it does, but judging from the help entry, it appears like it can still only address 4GB at a time, so it's more or less Actually it's a lie. I've got a dual Pent III with 4Gb RAM. You cannot have a single process that uses more than 2Gb of RAM with any of the Linux 2.4 kernels. We hadda install Solaris on the box to do what we wanted to. -- [EMAIL PROTECTED] - HMC UNIX Systems Manager _ Unsubscribe list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Mersenne: Mersenne.org server news?
Just like the outage over Labor Day weekend we seem to have an outage that started around Wedneday before Thanksgiving. Most things were functional then but the status updates had last run 8am. Now we've got an unresponsive server. Anyone heard anything? -- [EMAIL PROTECTED] - HMC UNIX Systems Manager My opinions are my own and probably don't represent anything anyway. _ Unsubscribe list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
