Mersenne Digest Monday, January 3 2000 Volume 01 : Number 675 ---------------------------------------------------------------------- Date: Sat, 01 Jan 2000 21:20:45 -0500 From: Matthew Smith <[EMAIL PROTECTED]> Subject: Re: Mersenne: Periodic HD activity I had the same problem, at least in 98. It is a program called findfast. It links or archives or does something like that. You can disable it, but it likes to respawn. My advice is to write a script that kills the findfast process whenever it shows up. Colin Percival wrote: > This question came up about a year ago, and I can neither remember what > the answer was, nor find it in the archives. > Someone stated that running prime95 under windows they experienced > periodic hard drive activity, without any reason for it. Other people > noted that they had experienced the same problem even while not running > prime95. > I did not experience this until a few days ago when I upgraded from 64MB > to 128MB of RAM; since then, irregardless of what programs I have running, > my hard drive will, within a couple days, start 'clicking' (ie, short > bursts of activity) exactly once per second. It keeps on doing so until I > restart windows. (BTW, I am running win2k RC2, but it seems that this > occurs over all versions of win32). > > I know this isn't related to Mersenne primes, but I'm hoping that someone > will remember the discussion and be able to help me. > > Thanks, > > Colin Percival > _________________________________________________________________ > Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm > Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers _________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Sat, 1 Jan 2000 18:50:28 -0800 From: "John R Pierce" <[EMAIL PROTECTED]> Subject: Re: Mersenne: Periodic HD activity > I had the same problem, at least in 98. It is a program called findfast. It > links or archives or does something like that. You can disable it, but it > likes to respawn. My advice is to write a script that kills the findfast > process whenever it shows up. to disable fastfind (which is part of MS Office), do all of the following. 1) start->settings->Control panel -> Fast Find... from the menu, select 'stop indexing', then delete each index thats listed. 2) remove 'fast find' from the startup group (start -> programs -> startup ...). 3) to really remove all traces of it, run Office Setup again, find the Fast Find tool in the various tools thingies, and uncheck it, then let setup remove it. _________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Sat, 01 Jan 2000 18:54:42 -0800 From: Colin Percival <[EMAIL PROTECTED]> Subject: Re: Mersenne: Periodic HD activity Thanks to the people who pointed out that findfast causes such hard drive activity. Since this is windows 2000, findfast is actually called the 'indexing service', but it is the same thing. I've disabled it, and in the past few days have not had any problems, so I'm reasonably certain that it was at fault. Colin Percival _________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Mon, 03 Jan 2000 11:41:26 -0500 From: Sandy Harris <[EMAIL PROTECTED]> Subject: Mersenne: Prime search on SMP Linux I'd like to search for Mersenne primes on my SMP Linux box. Info on the search is at: http://www.mersenne.org/prime.htm Machine is a dual Celeron 466, 256 megs. It is my server, basically single-user, powered up 24/7 and I'm not there all time. RedHat 6.1, 2.2.x kernel. I'd like to run one copy of the search code in such a way that it monopolises one CPU, in hopes it will succeed relatively quickly. Is there a way to do that? I'd also like to run a second copy at low priority, set up so it will not interfere with either the primary prime searcher or anything else I want to do with the machine. I'm assuming here that there's no multi-threading in the search code, that it would not be useful to try and run one search using both CPUs. Is that accurate? _________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Mon, 03 Jan 2000 14:14:21 -0500 From: George Woltman <[EMAIL PROTECTED]> Subject: Re: Mersenne: Prime search on SMP Linux Hi Sandy, At 11:41 AM 1/3/00 -0500, Sandy Harris wrote: >I'd like to run one copy of the search code in such a way that it >monopolises one CPU, in hopes it will succeed relatively quickly. >Is there a way to do that? Yes. Run mprime -m and choose Advanced/Priority. Enter a value of 9 instead of the default value of 1. Now let me explain why you don't want to do that. Assume the other tasks you run every day require 1000 CPU seconds. No matter what priority you run mprime at there are only 2*86400 - 1000 CPU seconds available. Raising mprime's priority will slow down the other tasks but not improve mprime's throughput at all. >I'm assuming here that there's no multi-threading in the search code, >that it would not be useful to try and run one search using both CPUs. >Is that accurate? You are correct. Run one mprime with no arguments and run the second mprime with the "-A1" argument. Hope that helps, George _________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Mon, 3 Jan 2000 21:18:58 -0500 From: [EMAIL PROTECTED] Subject: Mersenne: Cron scheduling Can anyone give me some idea on how I could start mprime on my linux box during bootup and have it check to see if it is running periodically and restart it if it isnt? Thanks Marc _________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ Date: Mon, 3 Jan 2000 22:22:58 -0500 From: Pierre Abbat <[EMAIL PROTECTED]> Subject: Re: Mersenne: Cron scheduling On Mon, 03 Jan 2000, [EMAIL PROTECTED] wrote: >Can anyone give me some idea on how I could start mprime on my linux box during >bootup and have it check to see if it is running periodically and restart it if it >isnt? Here's a pair of scripts I use for NFSNET. Substitute mprime for sieve and ignore the battery stuff if your box isn't a laptop. Run periodically from your crontab. phma - --- # ~/nfsieve/batcheck #!/bin/bash # Checks the battery. If it is not 100%, suspend sieve. sievepid=`/sbin/pidof sieve` if [ -z $sievepid ] ; then if [ -f /home/phma/nfsieve/nfs.out ] ; then /home/phma/nfsieve/sieben fi else if [ `/usr/bin/battery` = "100%" ] ; then kill -CONT $sievepid renice 20 $sievepid >/dev/null else kill -STOP $sievepid fi fi - --- # /usr/bin/battery #!/bin/sh cut -f 7 -d " " /proc/apm _________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers ------------------------------ End of Mersenne Digest V1 #675 ******************************
