Proccesor Interrupt Time too high!

G

Guest

Guest
Archived from groups: microsoft.public.windowsxp.general,microsoft.public.windowsxp.help_and_support (More info?)

?e??Hello everybody.

As you know there is a hidden virtual task or proccess in Windows XP called
"Interrupts Time". (And i say hidden because it's not shown on Task Manage
of XP, but is shown on some other third-party task managers.

Well, my problem is that this meter is really full most of the time i use
the PC, even in times i don't do anything demanding (processor-wise), like
for example opening Outlook Express or IE, and it conusumes all of the CPU
power (2,6 Ghz) just by trying to launch an application, search the hard
drive or even bringing up a new window of a program!

After searching for the cause of this, i found out that what this meter
really shows is the Interrupt Requests (IRQs) that various devices send to
the CPU requiring its immediate attention. I guess that would mean that a
particular device is maybe asking for too much attention because it probably
malfunctions.

So after disabling all peripheral devices and leaving only the necessary, i
found out that the hard disk causes too many interrupts when i (or anything
else) tries to access it. But what's strange is that the HD seems really
fine. No S.M.A.R.T. warnings, no strange sounds, no failures, no bad
sectors... It really seems to work just fine, and also the Ultra-ATA feature
is enabled, so it shouldn't ask for so many interrupts (while a month or so
before didn't).

I would really appreciate if anyone would give me a clue about this like if
it would be cause by software, something other besides the HD, or if anyone
else besides me has experienced the same problem.

Thanks in advance.
 
G

Guest

Guest
Archived from groups: microsoft.public.windowsxp.general,microsoft.public.windowsxp.help_and_support (More info?)

Interrupts have a prioritized handling. You can use Perfmon to monitor
the processor interrupts per second. Just add the appropriate counter.
Normally, a range of 150-300 per second is normal. These interrupts
occur whether the PC is actively loaded with applications. By design
IDE controllers use IRQ's #14 & #15. You might run MSInfo32 and
see how your PC's IRQs are mapped.
From the tone of your post it sounds like you can comprehend more
advanced technical information. I would suggest your read the following
article to get a better insight into IRQ/APICs.
http://www.microsoft.com/whdc/system/sysperf/apic.mspx

"Stavros Sk." <stavros_sk@hotmail.com> wrote in message
news:%23WNx5CBsFHA.4044@TK2MSFTNGP09.phx.gbl...
> ?e??Hello everybody.
>
> As you know there is a hidden virtual task or proccess in Windows XP
> called
> "Interrupts Time". (And i say hidden because it's not shown on Task Manage
> of XP, but is shown on some other third-party task managers.
>
> Well, my problem is that this meter is really full most of the time i use
> the PC, even in times i don't do anything demanding (processor-wise), like
> for example opening Outlook Express or IE, and it conusumes all of the CPU
> power (2,6 Ghz) just by trying to launch an application, search the hard
> drive or even bringing up a new window of a program!
>
> After searching for the cause of this, i found out that what this meter
> really shows is the Interrupt Requests (IRQs) that various devices send to
> the CPU requiring its immediate attention. I guess that would mean that a
> particular device is maybe asking for too much attention because it
> probably
> malfunctions.
>
> So after disabling all peripheral devices and leaving only the necessary,
> i
> found out that the hard disk causes too many interrupts when i (or
> anything
> else) tries to access it. But what's strange is that the HD seems really
> fine. No S.M.A.R.T. warnings, no strange sounds, no failures, no bad
> sectors... It really seems to work just fine, and also the Ultra-ATA
> feature
> is enabled, so it shouldn't ask for so many interrupts (while a month or
> so
> before didn't).
>
> I would really appreciate if anyone would give me a clue about this like
> if
> it would be cause by software, something other besides the HD, or if
> anyone
> else besides me has experienced the same problem.
>
> Thanks in advance.
>
>
>
 
G

Guest

Guest
Archived from groups: microsoft.public.windowsxp.general,microsoft.public.windowsxp.help_and_support (More info?)

Thank you for helping me achive a more insight understanding on how these
details work. In fact, what you told me about IDE controllers gave me the
idea for an instant solution! I just switched the IDE cables on which the 2
HDDs are connected and Voila! A brand new processor without being
"interrupted" anymore :)



"R. McCarty" <PcEngWork-NoSpam_@mindspring.com> wrote in message:
news:O3k0baBsFHA.3788@TK2MSFTNGP12.phx.gbl...
> Interrupts have a prioritized handling. You can use Perfmon to monitor
> the processor interrupts per second. Just add the appropriate counter.
> Normally, a range of 150-300 per second is normal. These interrupts
> occur whether the PC is actively loaded with applications. By design
> IDE controllers use IRQ's #14 & #15. You might run MSInfo32 and
> see how your PC's IRQs are mapped.
> From the tone of your post it sounds like you can comprehend more
> advanced technical information. I would suggest your read the following
> article to get a better insight into IRQ/APICs.
> http://www.microsoft.com/whdc/system/sysperf/apic.mspx