Re: Mersenne: LL test efficiency

2002-03-01 Thread Brian J. Beesley
On Wednesday 27 February 2002 06:26, Steve Harris wrote: For those of you interested in optimizing efficiency of LL testing: We are approaching first time tests of 15.30M exponents, at which point the Prime95 program will start using an 896K FFT. However, the P4-SSE2 section of the

Re: Mersenne: error: Another mprime is already running!

2002-03-01 Thread Brian J. Beesley
On Friday 01 March 2002 00:40, Mary K. Conner wrote: At 05:17 PM 2/28/02 -0500, George Woltman wrote: mprime should only raise this error if the pid in the local.ini file and the current pid are both running mprime (actually comparing the inode values). If there are any Linux experts that

Re: Mersenne: Two L-L tests at once?

2002-03-01 Thread Brian J. Beesley
On Thursday 28 February 2002 22:03, Guillermo Ballester Valor wrote: Hi, On Thu 28 Feb 2002 22:19, Brian J Beesley wrote: [ snip ] The difference here is that your method generates memory bus traffic at twice the rate George's method takes advantage of the fact that (with properly

Re: Mersenne: Two L-L tests at once?

2002-03-01 Thread Guillermo Ballester Valor
Hi, On Friday 01 Mar 2002 21:22, Brian J Beesley wrote: [ snip ] The memory bottleneck was the first thing I thought, and I was near to discard the idea when I realized that the trig bata would be the same, and the required memory access would be less than double the single stream

Mersenne: Re: Two L-L tests at once?

2002-03-01 Thread Steinar H. Gunderson
On Fri, Mar 01, 2002 at 08:22:44PM +, Brian J Beesley wrote: Sure But the only way there would be a problem here (given that the data values are independent because of the different random offsets) is if there was a major error like miscounting the number of iterations This is relatively

Re: Mersenne: LL test efficiency

2002-03-01 Thread Steve Harris
On Friday 1 March 2002 15:31, Brian J. Beesley wrote: On reflection I can see that there is merit in Steve's idea (provided that restraint is used i.e. not grabbing more work than is neccessary to bridge the rather small exponent gap). Thanks, Brian. I probably should have mentioned in my

Re: Mersenne: error: Another mprime is already running!

2002-03-01 Thread Mary K. Conner
At 08:58 PM 3/1/02 +, Brian J Beesley wrote: That would be a crude and surely unusual way of economising Definitely so, but it's the only way I can think of that someone might use a hard link when installing mprime For someone coming from Windows, that might be the way they think to do it