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John Honorary cruncher
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A 64-bit Windows executable for gcwsieve has been built. Now we are looking for testers. Anyone interested, please PM me and I'll respond with instructions.
If you are familiar with the sieving process, you can download the 64 bit Windows version of gcwsieve here:
http://www.geocities.com/g_w_reynolds/gcwsieve/gcwsieve-1.1.2-windows-x86-64.zip
The test sieve file can be downloaded here:
http://www.elaurian.org/pg/sieve/cullen4M-5M_20070826_26217.zip
Please test the following range: 1000G-1050G 4M-5M file
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I just did a quick test with WinXP 64
I did run 1000-1001 1010-1011 1020-1021 1030-1031 4M-5M
on a C2Quad 2,4ghz 2gig ram
364000-365000 p/sec
The only range i can compare to is 3-4M 4000-4400G on Ubuntu 64
399000-401000 p/sec
Both run on all 4 core's
I have not completed any range, only tested speed. It's much faster than 32bit Window's
Lennart |
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I have now tested this range and can not find any problem.
1000G-1050G 4M-5M
I have done the same on Linux 1000-1010G 64bit
and time is the same.
363000-367000 p/sec On both WinXP64 & Linux64 (Ubuntu)
The computer is Core 2 Quad 2,4Ghz 2G Ram
Lennart
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Hello.
I'am testing to run Boinc and 2 sr2sieve at the same time.
The computer is a C2Duo 6300 1,8Ghz. 2G Ram WinXP x64
Boinc use 16-17% per task
SR2sieve nr 1 use 50%
SR2sieve nr 2 use 16-17%
Someone understand why ?
Lennart
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RytisVolunteer moderator
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Someone understand why ?
Apparently sr2sieve #1 gets a whole core, and sr2sieve #2 and other 2 BOINC workunits share another one. Got to love Windows scheduling...
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Well, I don't see a way do to a better scheduling. In order to give all tasks an euqal amount of CPU time at least one process has to be migrated between the two cores all the time. And that would be a massive overhead which probably would result in a quite bad perfomance.
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Synecdoche
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RytisVolunteer moderator
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If there were 3 processes competing for the time, yes - but there are 4 (two BOINC apps, because BOINC runs one per core, and two sr2sieves), so two should run on one core and two on another.
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OK, that´s correct. Well, anyway I don't think that the verall performance would really be better if the four processes were equally divided on those two cores. The only big difference is that all processes then should get an equal amount of CPU time. If that is imporant for you than the scheduling of windows is indeed bad, otherwise it won't matter.
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Now i have restarted the computer and what now!!
Now Boinc primegrid_gcwsieve nr1 at 50%
gcwsive nr2 17%
sr2sieve nr1 16%
sr2sieve nr2 16%
Win 64 works great :-)
Lennart
Edit: after about 40 min it come up whith 4x25%
Maybe Bill read's in here :-)
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I tried recently to sieve via boinc on a vista 64-bit platform. Boinc correctly downloaded the 64-bit gcw application (windows version 1.05) but I have some problems.
First off, right at finishing a task boinc manager freezes for about 1 to 3 minutes. Then on many occasions, I get the following message:
13.10.2007 11:40:52|PrimeGrid|Task gcwsieve_260221_0 exited with zero status but no 'finished' file
I am quite sure the problems is about the application, because LLR runs very smooth on that host. Any chance for a bug fix on that?
-D
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RytisVolunteer moderator
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Does disk usage spike at the time of the launch?
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Does disk usage spike at the time of the launch?
Yes, a bit, perhaps close to 0.5 MB/s right at the lunch of the sieving app.
-D
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Does disk usage spike at the time of the launch?
Yes, a bit, perhaps close to 0.5 MB/s right at the lunch of the sieving app.
-D
I think, it is/was not a problem of the application though. I just managed to re-install boinc but this time not into the default (programs) directory tree. I just read somewhere else that vista has a problem here (service installation and alike). Currently it looks like if it works much better with this new location.
-D
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