big arsed WU

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Postby Ripshod » Sun Nov 30, 2003 12:32 pm

I'll try that, but to be honest its just good to be folding at my normal rate again!
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Postby Tulatin » Sun Nov 30, 2003 12:33 pm

i know what you mean. A while ago i had one that would do a frame every 30 minutes...
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Postby Tau » Sun Nov 30, 2003 1:10 pm

I'm in the middle of a 400wu and its ticking over at around 1 frame every 10 mins as to 1 frame every 20 mins when I had cpu usage set to 50% :oops: (1.7 Celeron)

Other rig is crunching yet another 2500 at about 1 frame every 20 mins or so. (XP2000)
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Postby len444 » Sun Nov 30, 2003 3:07 pm

definitely make certain to use the -config flag w/ the console version, and choose yes to "change advanced options" adjust cpu usage to 100 (windows console). newest 4.0 prerelease version has the cpu setting to 100 as default.

there have been some flag changes (w/ the 4.0 pre1 versions that only apply to athlon xp cpu's- such as forceasm now representing 3dnow!+, and forceSSE representing sse optimizations. if neither of the 2 are used, it will use 3dnow!+ w/ the difference that it will throttle back if problems are encountered, whereas the -forceasm flag will force 3dnow!+ and keep it from dropping the assembly code optimization.
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Postby profofpcs » Sun Nov 30, 2003 4:22 pm

whats a flag do? i dont think im running any of them. just downloaded the program and started running.
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Postby charlene » Sun Nov 30, 2003 5:33 pm

Ripshod wrote:
Forget that, you've already completed it, how was it for you? :wink:


All my WUs have been fine (all went at similar speeds) until this 400 one. So it was fine for me :wink:

Len you're right about the frames thing - it shows in my log file when each frame is completed. Lemme guess - the 400's take ages but give you hardly any points? :wink:

Still doing the 400.... 90% done :roll:
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Postby len444 » Sun Nov 30, 2003 6:25 pm

charlene wrote: Len you're right about the frames thing - it shows in my log file when each frame is completed. Lemme guess - the 400's take ages but give you hardly any points?


well, look up the wu #, and you'll probably see it's about 71pts. reference the current projects list to see what it is. it takes longer because it won't use assembly optimizations. gromacs wu's are optimized to use assembly optimizations, and this might equate to being as much as a 20% speed boost.

cacrusn wrote:whats a flag do?

flags can be used to engage the assembly optimizations, though it varies depending on the type of cpu. for now, you can reference the team page in my sig for further explanation. basically, flags impart some extra functionality, which can be feature orientated, as well as performance orientated.
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Postby Ripshod » Sun Nov 30, 2003 7:10 pm

Cheers Tulatin, that SSE boost packs some wallop doesn't it? :wink:

*edit*

Must have missed it while I was offline (long story, soon to be made into a film) :twisted: :lol:
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Postby CDBurner » Sun Nov 30, 2003 7:50 pm

If the CPU supports SSE, does F@H automatically use SSE, or do I have to enable SSE with the command line flag?
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Postby len444 » Sun Nov 30, 2003 8:55 pm

CDBurner wrote:If the CPU supports SSE, does F@H automatically use SSE, or do I have to enable SSE with the command line flag?


sse makes the cpu run hotter, and there can be some instability encountered. athlon xp cpu's need a flag to use sse. pretty sure that pentium III's and 4's will use sse w/ -forceasm flag regardless of client version (3.24, 3.25beta, or 4.00pre1). athlon xp cpu's will need -forceSSE flag w/ the latest v4.00pre1 beta versions to get sse assembly code functioning.
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