Beta 4.72 adjusts completion time nicely but doesn't keep them

Message boards : Number crunching : Beta 4.72 adjusts completion time nicely but doesn't keep them
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Brian D from Georgia
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Message 152848 - Posted: 18 Aug 2005, 2:47:44 UTC

An aggrevation of mine since joining BOINC was the terrible job it does of calculating the time it will take to complete a work unit. I have 4 hosts with varying Intel cpu types and speed. I can never cache an appropriate number of work units because its calculations are off by factors of 3 to 1 or worse. I was happy to see 4.72's documentation have a feature that adjusts the calculated work time each time a work unit gets completed. This works great, my calculated times slowly drift downward with each finished work unit just as advertised. Problem is that once I connect to upload/download work units, the calculated time gets reset back to the original excessively long estimate. I run a 4 day connect time and suspend network connectivity until I get about 80 percent of my work units completed and then connect. I also run Einstein, Predictor, LHC as well as SETI in various combo's on my 4 hosts. This "bug" is present in all clients and all hosts. Is anyone else noticing this? Is this a bug in 4.72? Will it be fixed in the next beta?


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Jesse Viviano

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Message 152856 - Posted: 18 Aug 2005, 2:56:52 UTC - in response to Message 152848.  

An aggrevation of mine since joining BOINC was the terrible job it does of calculating the time it will take to complete a work unit. I have 4 hosts with varying Intel cpu types and speed. I can never cache an appropriate number of work units because its calculations are off by factors of 3 to 1 or worse. I was happy to see 4.72's documentation have a feature that adjusts the calculated work time each time a work unit gets completed. This works great, my calculated times slowly drift downward with each finished work unit just as advertised. Problem is that once I connect to upload/download work units, the calculated time gets reset back to the original excessively long estimate. I run a 4 day connect time and suspend network connectivity until I get about 80 percent of my work units completed and then connect. I also run Einstein, Predictor, LHC as well as SETI in various combo's on my 4 hosts. This "bug" is present in all clients and all hosts. Is anyone else noticing this? Is this a bug in 4.72? Will it be fixed in the next beta?

This is actually a bug in SETI@home because it does not accurately report the percentage of work completed. Einstein@home is much better in its calculations of the percentage of work left to complete, and therefore BOINC can actually estimate the time for Einstein@home fairly accurately.
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1mp0£173
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Message 152867 - Posted: 18 Aug 2005, 3:14:36 UTC - in response to Message 152848.  

An aggrevation of mine since joining BOINC was the terrible job it does of calculating the time it will take to complete a work unit. I have 4 hosts with varying Intel cpu types and speed. I can never cache an appropriate number of work units because its calculations are off by factors of 3 to 1 or worse. I was happy to see 4.72's documentation have a feature that adjusts the calculated work time each time a work unit gets completed. This works great, my calculated times slowly drift downward with each finished work unit just as advertised. Problem is that once I connect to upload/download work units, the calculated time gets reset back to the original excessively long estimate. I run a 4 day connect time and suspend network connectivity until I get about 80 percent of my work units completed and then connect. I also run Einstein, Predictor, LHC as well as SETI in various combo's on my 4 hosts. This "bug" is present in all clients and all hosts. Is anyone else noticing this? Is this a bug in 4.72? Will it be fixed in the next beta?

I believe I read elsewhere that the correction factor is used for the time estimate, but is not carried through to the SETI servers when requesting work.

Don't know when you'll see it, but I suspect that it's coming.
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Ingleside
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Message 152973 - Posted: 18 Aug 2005, 11:04:48 UTC - in response to Message 152848.  

There is atleast one bug in the correction-factor that was hopefully fixed a couple days ago, so will be included in v4.73 or whatever next build will be...
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T1ger5hark

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Message 154453 - Posted: 21 Aug 2005, 7:19:24 UTC

Brian D, can you contact me. I have a question about my other acct. on the MSC team. You are the leader of our group, right?

Thanks.
Warren
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Message boards : Number crunching : Beta 4.72 adjusts completion time nicely but doesn't keep them


 
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