CPU peaks/Mouse Lag in 5384.4


J

Jiøí Fiala

I have a nasty problem in 5381 and 5384.4. My CPU peaks every other second,
resulting in a temporary systom halt (cursor stops, sound interrupts, hard
drive pauses...). This happenned to me in previous builds only when
installed to SATA drive. In 5381 and 5384, it doesn't matter if I install it
on IDE or SATA, the problem is persistent

My config:

Athlon 64 3000+ Socket 754
Mobo Gigabyte K8VT800
1,5 GB RAM DDR
IDE and SATA drives (non-RAID)
GeForce 6600 AGP
Onboard Realtek AC97

Any ideas?
TIA
 
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J

Jirí Fiala

No, unfortunatelly this is not the case :blush:( I tried the new nvidia beta
drivers. Thanks though.
 
R

R. McCarty

Download SysInternal's Process Explorer Tool, it should help you
to isolate what is causing the processor % spikes.
 
J

Jir? Fiala

Thanks! Its DPCs - Deferred Procedure Calls. Its performance graph looks
like a haircomb with evenly distributed spikes of similar height. Anyone
knows what this means?
 
G

Gabriel Lozano-Morán

DPC's are used by either a device driver or by the kernel. Could be that one
of the device drivers you have installed is badly written. When writing
device drivers there are certain rules you need to take in account. One of
these rules is to have the amount of processor time for a DPC as low as
possible. So having a high number of DPC's is not necessarely a problem but
the processor time the DPC needs to execute is very important because it
runs in the active thread and it might hurt the performance of the process
you are running like for example a game or even in your case Windows. That's
also why Microsoft signs drivers with the WHQL logo they test for example
the microseconds DPC's need to execute which needs to be under a certain
limit.

What you can do is to see if this behavious is being caused by a certain
application.
 
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J

Jir? Fiala

It seems to be caused by faulty Nvidia driver. MS's driver in 5384 caused
the system to be virtually unusable with my Sparkle GeForce 6600, Nvidia's
newest driver helped alot, but there are still minor halts every 2
seconds... Never happened in XP and Vista builds prior 5365.

Thank you very much for response, though.
 

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