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David Autumns
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System Idle Process getting a look in on Windows 2003

With BOINC on a Window 2K3 server I'm seeing time being taken by the System Idle process while FAAH is running just every now and again

I've run virus scanners and spyware catchers - nothing

Even if I up the priority of FAAH to high the System Idle process still gets a look in


Any ideas?

Dave


tired
worried
thinking
confused
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[Apr 8, 2006 12:47:02 PM]   Link   Report threatening or abusive post: please login first  Go to top 
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Re: System Idle Process getting a look in on Windows 2003

Interesting. Not hyperthreaded or SMP, are you?

Server OSs tend to have different priorities. Open System Properties/Advanced/Performance Settings/Advanced and see how your system is set up.

Also, open Task Manager, and sort by CPU then give us an idea of what is using most time (the top few processes, with average percentages).
[Apr 8, 2006 1:06:58 PM]   Link   Report threatening or abusive post: please login first  Go to top 
David Autumns
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Re: System Idle Process getting a look in on Windows 2003

Hi D

No just some poor 32 bit 2800+ Sempron doing it's thing.

It's set for best performance for programs under cpu and mem

somethings amiss even if I run UD System Idle still breaks in

!!
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[Apr 8, 2006 2:16:31 PM]   Link   Report threatening or abusive post: please login first  Go to top 
David Autumns
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Re: System Idle Process getting a look in on Windows 2003

Rossetta is there at 97%

and then SQL Server SWdoctor and explorer.

Just every now and again System Idle hogs the cpu

bizzarre
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David Autumns
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Re: System Idle Process getting a look in on Windows 2003

Not doing it now on Rossetta but I'm knee deep in Rossetta WU's now.

I'll let you know
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RT
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Re: System Idle Process getting a look in on Windows 2003

Without understanding much about it, it kinda sounds like a memory/paging issue. Is there enough free memory? Is the swap file big enough? could there be some disk errors in the middle of the swap file...(somebody is halting the Rosetta task for some reason and system idle consequently soaks it up.... likey a disk issue of some sort?)
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Re: System Idle Process getting a look in on Windows 2003

Okay, two suggestions: for the System Idle process to get a look in (I should have thought of this before) there just has to be no demand on the CPU. Either FAAH is causing some paging, and the filesystem is the bottleneck, or FAAH is taking a few seconds out from crunching to save a checkpoint.

If you want to look into this further, your best bet is System Monitor. Fire it up, and add Process(Idle) % Processor Time, and PhysicalDisk % Disk Time. See if there is any correlation. You can always track a few other metrics as well.

System Monitor has moved to Control Panel->Administrative Tools->Performance.
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David Autumns
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Re: System Idle Process getting a look in on Windows 2003

Thanks Chaps you have pointed me in the right direction

The Webserver has 2 sticks of 256Mb on a nForce2 Mobo that borrows some memory for the onboard graphics. It's sits on top of a Welsh dresser.

Yesterday I flipped out one of the nice corsair sticks and used it to diagnose another faulty board I have. All this is working over head height.

After giving up on the other board I fitted it back in with the nice click click you get with memory and rebooted the server.

I thought it was running OK but you got me thinking. I ran the performance monitor and that disk is thrashing away.

I checked the front of the system tabs and there it was 240Mb Memory fitted (16Mb stolen for graphics) d oh

It wasn't the stick I put back but the one next to it which had had it's extractor moved when I took out the original stick aarrgghh


496Mb of Ram now - it makes all the difference blushing

Just goes to show how much mem you need for FAAH. It didn't show nearly as much with Rossetta.

Thanks for your help

Dave
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[Apr 8, 2006 7:24:08 PM]   Link   Report threatening or abusive post: please login first  Go to top 
David Autumns
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Re: System Idle Process getting a look in on Windows 2003

I'll put the side panel back on now and not touch it again biggrin
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[Apr 8, 2006 7:26:43 PM]   Link   Report threatening or abusive post: please login first  Go to top 
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