any way to tell why I came up invalid?

David S
David S
Joined: 6 Dec 05
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Topic 197754

It doesn't happen to me very often, but I'm still curious.

http://einsteinathome.org/workunit/200750830

David

Miserable old git
Patiently waiting for the asteroid with my name on it.

Logforme
Logforme
Joined: 13 Aug 10
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any way to tell why I came up invalid?

My guess is that the two AMD CPU's produced a slightly different result than your Intel CPU. Maybe your result would verify against another Intel CPU.
Stuff like this makes me worry about the accuracy of the science done here :)

Pooh Bear 27
Pooh Bear 27
Joined: 20 Mar 05
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Do you have your virus

Do you have your virus software scanning the ProgramData\BOINC folder? This can sometimes interrupt the writing of important files as the files could be locked by the virus software during the scan. As you state it is rare and usually virus software is set to scan at different intervals (daily, weekly, etc). So on the rare occasion the virus software has a file locked and the Einstein program needs to do a write it may cause just enough of a blip that the signatures do not match when the final counts are sent back to the servers.

It's always been a recommendation to have the virus software skip that directory for this type of reason and others. I would try that first and see if your issue goes away.

Otherwise it could be you have a memory chip with one bad register. This register may not always be utilized, depending on what else may be running through memory. That randomization is very hard to detect also. Even RAM testing software may not catch it.

So, just start with the virus software if you have not yet.

73s

David S
David S
Joined: 6 Dec 05
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Credit: 22,936,222
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At the time, I was only

At the time, I was only running MSE (I have since installed a different AV). I'm not sure if it scans that directory or not, but I'd think if that was the problem it would be more frequent.

David

Miserable old git
Patiently waiting for the asteroid with my name on it.

AgentB
AgentB
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I looked over the task and

I looked over the task and this may or may not be relevant

Shortly after

% checkpoint 219
% Sky point 220/275

it looks to my untrained eye, that the task was restarted from that checkpoint.

I see no other invalids so the sample size is small, i guess it is the same host with the invalids.

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