Change in CPUs

Message boards : Number crunching : Change in CPUs

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Profile Gerry Rough
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Message 37723 - Posted: 12 Mar 2007, 19:53:34 UTC

Suddenly my core 2 duo is not duoing! Hmmmm. I tried changing to a host specific preference to 2 CPUs, but that didn't work. My general preferences in BAM! are still only 1 CPU, but it never was a problem before so I kept it that way because my other boxes are single cores. Rosy isn't downloading either, though that issue is in another thread. I am now 100% proteins with no rosy.

What gives? [sniffle] I biss my rosy! [sniffle] [aaapffffth]!!

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Profile Gerry Rough
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Message 37730 - Posted: 12 Mar 2007, 22:43:45 UTC

I'm still trying to figure out what is going on with my dual core only using one core. Here is what happens when I try to sync with BAM! As you can see below, it runs CPU benchamrks, tells me that my number of CPUs has changed from 1 to 2, then immediately runs another set of CPU benchmarks and concludes that the number of CPUs has changed from 2 to 1. I do realize that I have some multiple personality problems, but they are until now relegated to only when I argue with myself!!

Here are the messages:


3/12/2007 6:25:27 PM||Contacting account manager at http://bam.boincstats.com/
3/12/2007 6:25:27 PM||Account manager: BAM Host-ID: 29811
3/12/2007 6:25:27 PM||Account manager contact succeeded
3/12/2007 6:25:27 PM||General prefs: from http://bam.boincstats.com/ (last modified 2007-03-12 18:25:35)
3/12/2007 6:25:27 PM||Host location: none
3/12/2007 6:25:27 PM||General prefs: using your defaults
3/12/2007 6:25:27 PM||Number of usable CPUs has changed from 1 to 2. Running benchmarks.
3/12/2007 6:25:27 PM||Running CPU benchmarks
3/12/2007 6:25:27 PM||Suspending computation - running CPU benchmarks
3/12/2007 6:25:45 PM||General prefs: from http://bam.boincstats.com/ (last modified 2007-03-12 18:24:06)
3/12/2007 6:25:45 PM||Host location: none
3/12/2007 6:25:45 PM||General prefs: using your defaults
3/12/2007 6:25:45 PM||Number of usable CPUs has changed from 2 to 1. Running benchmarks.
3/12/2007 6:26:29 PM||Benchmark results:
3/12/2007 6:26:29 PM|| Number of CPUs: 1
3/12/2007 6:26:29 PM|| 1921 floating point MIPS (Whetstone) per CPU
3/12/2007 6:26:29 PM|| 4085 integer MIPS (Dhrystone) per CPU
3/12/2007 6:26:30 PM||Resuming computation
3/12/2007 6:26:30 PM||Running CPU benchmarks
3/12/2007 6:26:30 PM||Suspending computation - running CPU benchmarks
3/12/2007 6:27:31 PM||Benchmark results:
3/12/2007 6:27:31 PM|| Number of CPUs: 1
3/12/2007 6:27:31 PM|| 1946 floating point MIPS (Whetstone) per CPU
3/12/2007 6:27:31 PM|| 4123 integer MIPS (Dhrystone) per CPU
3/12/2007 6:27:31 PM||Resuming computation


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Thomas Leibold

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Message 37736 - Posted: 12 Mar 2007, 23:11:25 UTC - in response to Message 37730.  

That is very wierd:
At 6:25:27 PM you get preferences from your Boinc Account Manager that indicate that the Number of usable CPUs changed from 1 to 2 and also saying that the last time you changed preferences was at 18:25:35 (same day).
That part is fine as long as we assume that your local PC clock is a few seconds slow (or the time at the BAM server is a little fast).
Then at 6:25:45 PM Boinc is getting the preferences again, only this time the Boinc Account Manager responds that the number of CPUs changed from 2 to 1 and that the last time you changed your preferences was at 18:24:06 (which is ***older*** than the previously stated date/time of last change)!!!

Whatever the reason, it does appear that your problem has its roots at the Boinc Account Manager (bam.boincstats.com).

One speculative possibility might be that bam.boincstats.com resolves to multiple servers that aren't perfectly synchronized and therefore allow the occasional release of stale (old) preferences.
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Message boards : Number crunching : Change in CPUs



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