Questions and Answers : Windows : \"Result duration correction factor\"
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Send message Joined: 6 Aug 04 Posts: 66 Credit: 7,420,379 RAC: 2,953 |
What is the above? I notice most of my PC\'s are set to 1.0, wheras my Atlon 64 3000+ has a figure 1.424242. What is this telling me? |
Send message Joined: 6 Aug 04 Posts: 66 Credit: 7,420,379 RAC: 2,953 |
p.s. I have just realised that this machine looks a though it has been struggling with a misallocated result and I have reset the project. Has this something to do with it? I also notice that my Linux machine is not showing a \"Result duration correction factor.\" |
Send message Joined: 5 Sep 04 Posts: 7629 Credit: 24,240,330 RAC: 0 |
I can\'t see this on mine. Where abouts is it displayed? |
Send message Joined: 6 Aug 04 Posts: 66 Credit: 7,420,379 RAC: 2,953 |
I can\'t see this on mine. My machine number is 170146 It is down the bottom of the page below \"Average CPU efficiency\" and above \"Location\". Is it to do with using Boinc 5.2.2 Windows XP Home. |
Send message Joined: 5 Sep 04 Posts: 7629 Credit: 24,240,330 RAC: 0 |
It must be 5.2.2 I don\'t have \"Average CPU efficiency\" either. I\'m still on 4.25 At least the other person won\'t be getting your credits now. :) There may be something about 5.2.2 on the SETI site, as they have far more people than us. |
Send message Joined: 5 Sep 04 Posts: 7629 Credit: 24,240,330 RAC: 0 |
I found it mentioned in the BOINC Wiki <a href=\"http://boinc-doc.net/boinc-wiki/index.php?title=Version_History_of_The_BOINC_Client_Software\"> here,</a> under Major Features of Version 5.x.x. But no explanation. |
Send message Joined: 5 Aug 04 Posts: 1283 Credit: 15,824,334 RAC: 0 |
The duration correction factor (DCF) is used in determining how long a result will take to complete. BOINC makes an initial estimate based on the system\'s benchmark figures and the estimated number of floating point operations specified for the result (actually in the workunit, but that\'s just nit-picking). This is then weighted by the DCF for that project. As a result is processed the project\'s DCF is modified to improve the time estimate. Unfortunately the initial estimate is way out for CPDN (I\'m seeing a 50% over-estimate in spinup testing!) and the adjustment downwards is in very small increments. My guess is that it\'ll take at least one complete result on your host to get the DCF down to the point where BOINC gives a reasonable estimate for CPDN. I can see this causing problems for people who are running multiple projects, with BOINC being forced into EDF scheduling mode unnecessarily because it thinks a CPDN result isn\'t going to meet a deadline that\'s easily achievable. "The ultimate test of a moral society is the kind of world that it leaves to its children." - Dietrich Bonhoeffer |
Send message Joined: 5 Aug 04 Posts: 426 Credit: 2,426,069 RAC: 0 |
I found it mentioned in the BOINC Wiki <a href=\"http://boinc-doc.net/boinc-wiki/index.php?title=Version_History_of_The_BOINC_Client_Software\"> here,</a> under Major Features of Version 5.x.x. But no explanation. Sorry the link is in now. The page is here: http://boinc-doc.net/boinc-wiki/index.php?title=Result_Duration_Correction_Factor BOINC WIKI BOINCing since 2002/12/8 |
Send message Joined: 5 Sep 04 Posts: 7629 Credit: 24,240,330 RAC: 0 |
Thanks for the link. Looks like lots of new things to learn. |
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