Hi Nick,
(USING TASK MANAGER)
Another experiment you can perform (WITH A LIGHTLY LOADED
SYSTEM) is to scroll with the Mouse wheel and compare this (CPU USAGE)
with scrolling a page at a time with the Scrollbar. The constant redraw of the
wheel scroll will use more CPU than the 'one-off' page redraw.
Then try moving the mouse quickly in circles - that will usually consume
5-10% of available CPU.
Then forget about it!!
--
Regards,
Pat Garard
Melbourne, Australia
_______________________
"Nick" > wrote in message
...
> I'm not sure if I understand the experiment. Having tried it, the result was
> that wheel scrolling was vastly smoother, though not perfectly smooth. Drag
> scrolling was very difficult with a fully occupied processor.
>
> Nick
>
>
> "Pat Garard" <apgarard-bigpond:net:au> wrote in message
> ...
>> G'Day Nick,
>>
>> The System Idle Process is a "Claytons" process that "accounts" for the time
>> the CPU is "executing" nothing - i.e. it has nothing else to do.
>>
>> Another experiment you can perform (with a lightly loaded system) is to
>> scroll with the Mouse wheel and compare this with scrolling a page at a
>> time with the Scrollbar. The constant redraw of the wheel scroll will use
>> more CPU than the 'one-off' page redraw.
>>
>> Then try moving the mouse quickly in circles - that will usually consume
>> 5-10% of available CPU.
>>
>> Then forget about it!!
>> --
>> Regards,
>> Pat Garard
>> Melbourne, Australia
>> _______________________
>>
>> "Nick" > wrote in message
>> ...
>>> Hi Pat,
>>>
>>> Thanks for your help. Interesting result. With Outlook open, I scroll one
>>> of its windows. This causes Outlook.exe to consume more than 50% of the
>>> processors output. Csrss.exe (the legitimate one) consumes about 20 during
>>> this scrolling.
>>>
>>> Otherwise, when idle, System Idle Process consumes > 80% of availability. If
>>> this is a measure of availability, it seems odd that it is listed at the top
>>> of the list of greatest CPU users. When System Idle Process is dominant,
>>> the task manager icon displays it value as the actual CPU usage.
>>>
>>> Confusing!
>>>
>>> Nick
>>>
>>>
>>>
>>> "Pat Garard" <apgarard-bigpond:net:au> wrote in message
>>> ...
>>>> G'Day Nick,
>>>>
>>>> Don't confuse us with facts.
>>>>
>>>> Run Task Manager
>>>> Click on the Processes Tab
>>>> Do NOT click in the body of the list.
>>>> Click on the column header 'CPU' (to sort), wait ...
>>>> ... and click it again (to sort in reverse).
>>>>
>>>> The process at the top of the list is the one using the most CPU -
>>>> what is its Image Name?
>>>> --
>>>> Regards,
>>>> Pat Garard
>>>> Melbourne, Australia
>>>> _______________________
>>>>
>>>> "Nick" > wrote in message
>>>> ...
>>>>> Hi...
>>>>>
>>>>> MY PROBLEM
>>>>>
>>>>> The CPU rarely goes below 50% and frequently goes and stays at 100%. To
>>>>> diagnose a possible problematic device driver, I tried the following:
>>>>>
>>>>> PROCESS EXPLORER (says...)
>>>>>
>>>>> SysInternals app "Process Explorer" says that the processor is
>>>>> overwhelmingly occupied by DPCs and Interrupts.
>>>>>
>>>>> (MICROSOFT RATTV3)
>>>>>
>>>>> "Rattv3" displays the response time of drivers. It diagnoses:
>>>>>
>>>>> - Audio and video "glitches"
>>>>> - Problems with other devices by overly delaying the execution of other
>>>>> ISRs
>>>>> and DPCs
>>>>> - Interference with applications due to over use of CPU time
>>>>>
>>>>> MICROSOFT RATTV (says...)
>>>>>
>>>>> Here is the first run. Can someone *capable of interpreting* this please
>>>>> this help me by picking out a problem driver, based on the execution
>>>>> times?
>>>>> Your expertise would be greatly appreciated.
>>>>>
>>>>> http://images.mirrosoft.net/RTTV3_report.mht
>>>>>
>>>>> Nick
>>>>>
>>>>> xp pro on SBS domain
>>>>> Athlon 3200+
>>>>> 1.5 gb PC3200
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>
>