stephenbrooks.orgForumMuon1Generalx64 windows
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2008-07-05 13:33:02
can project gain something from optimizing for x64 windows?
Stephen Brooks
2008-07-06 20:23:57
I think I said in a previous thread (somewhere) that I don't think so.  All the data fits inside the 32-bit memory window, I don't need huge numbers of gigabytes for now.
2008-07-08 10:31:15
mb wrong topic but who cares
If i set priority in Task Manager to something higher than normal, muon1 threads change every second from 1 to 4
Stephen Brooks
2008-07-08 10:35:12
Yes, Muon1 will do each timestep of calculation as 4 (or how ever many cores you have) threads, but will merge back to 1 thread to do some finishing up.  Check the % CPU usage to make sure setting to higher priority hasn't meant the 4 threads that are supposed to be running in parallel are now running in series and not using all the cores.  Generally Windows' thread/CPU allocation system is pretty good and in my experience I haven't needed to tweak it.
2008-07-08 18:36:56
so... i booted from livecd win xp x32 and tried to launch muon1. It gives 77-78 mpts in 1 minute.  It's 1.28-1.3 mpts\s... So mb you can somehow optimize muon1?
2008-07-08 18:38:56
and in x64 i have only 0.97 mpts\s
Stephen Brooks
2008-07-08 20:40:46
What processor are you using?  The modern ones I thought had fast emulation of 32bit programs under 64bit so there wasn't a speed penalty.
2008-07-08 21:15:51
Q6600... 30% of penalty suxx O.o
2008-07-08 21:21:30
mb it's Integer x16 iSSE2?
x32 - 17290 it/s, x64 - 13471 it/s
It's 28,3%
Stephen Brooks
2008-07-09 10:46:35
I'm not using any SSE instructions, so I don't know why x64 is slower, though I think I did see somewhere that it slows certain programs down.  Not sure why though.
2008-07-11 21:10:50
any progress?
2008-07-23 23:08:31
Stephen, can you open source to public? 
2008-08-12 17:58:16
no news? 
2008-12-29 04:33:25
2009-04-17 18:50:05
up up
2009-04-17 18:50:15
any progress?
2010-02-12 19:03:10
Anymore info about this Stephen?

x64's becoming more common now.....
Stephen Brooks
2010-07-15 11:24:09
Yeah but it's hard to build and test 64-bit software on a 32-bit workstation, and that's what I've got!  Also, free Windows C compilers supporting 64-bit (e.g. MinGW64) have only recently become available.

See also my post on why client updates are six months away.  Annoyingly there is a computer equipment-buying freeze in government right now, though I think some of the other machines here might be 64-bit.  A 64-bit port would come after getting the stable 32-bit version out and porting it to MinGW.
2011-02-05 00:51:56
hello =)
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