Vista - Re: [Resolved] Vista: high (45-50%) CPU usage due to hardware interrupts

12-16-2008

I checked the disk with Start -- Run -- perfmon /res, to find that
SearchIndexer.exe had loads of entries and files open. Googling
"SearchIndexer.exe", it turned out that it was named as the cause of high
cpu usage.

As a workaround, I went into Start -- Run -- services.msc and found the
Windows Search entry, changed it from 'Automatic' to 'Manual' and rebooted.
At the time of writing, this seems to have worked.

p.s. Prior to this, having iTunes, I went into control panel -- indexing
options and unticked index xml files and the search indexer started to
rebuild the index.

cheers,
eric t.

"Eric T" <nobody@xxxxxx> wrote in message
news:TaGdnfrRK51TmbHUnZ2dnUVZ8uGdnZ2d@xxxxxx

Quote:

> Like many other people, every now and again the CPU useage on my Vista
> machine goes up to 45-50% (which is likely to be nearly 100% of one of the
> CPU's cores). This doesn't show up in task manager's processes: all of
> those percentages are very low. Thank God I have two cores, or I'd be
> totally up the creek: the juddering delays are bad enough as it is.
>
> I got hold of the http://www.sysinternals.com/ Process Explorer and that
> shows that it's almost entirely hardware interrupts. Maybe duff hardware
> or a badly written driver? Still no luck in tracing the precise cause.
>
> It would be great if Process Explorer or some Microsoft diagnostic
> actually showed which interrupt/s were being generated so frequently, so
> that one could then trace that to a particular driver or piece of
> hardware.
>
> Cheers,
> eric t.
>

12-16-2008

> I checked the disk with Start -- Run -- perfmon /res, to find that

Quote:

> SearchIndexer.exe had loads of entries and files open.

Thanks for reporting back. Incidentally, MS claims that SearchIndexer runs
with the lowest priorities for I/O and CPU, so although it uses the
processor when you're not doing anything, Vista should stick it on the back
burner as soon as you need the CPU.

In theory, then, it shouldn't affect the responsiveness or user experience.

Personally, I love the facility to find any text string in any indexed file
in less than a second - I use it all the time. So I really like Vista's new
SearchIndexer and wouldn't dream of turning it off.

Furthermore, if you wait a few days it quietens right down anyway.

SteveT

**pcbilski** · 07-05-2009

I was having the same problem AFTER a fresh install, narrowed it down to Marvell 61xx RAID driver (which was the latest), just disabled the device and back to normal, but really irritating!

12-16-2008	#1 (permalink)
Eric T n/a posts	Re: [Resolved] Vista: high (45-50%) CPU usage due to hardware interrupts I checked the disk with Start -- Run -- perfmon /res, to find that SearchIndexer.exe had loads of entries and files open. Googling "SearchIndexer.exe", it turned out that it was named as the cause of high cpu usage. As a workaround, I went into Start -- Run -- services.msc and found the Windows Search entry, changed it from 'Automatic' to 'Manual' and rebooted. At the time of writing, this seems to have worked. p.s. Prior to this, having iTunes, I went into control panel -- indexing options and unticked index xml files and the search indexer started to rebuild the index. cheers, eric t. "Eric T" <nobody@xxxxxx> wrote in message news:TaGdnfrRK51TmbHUnZ2dnUVZ8uGdnZ2d@xxxxxx Quote: > Like many other people, every now and again the CPU useage on my Vista > machine goes up to 45-50% (which is likely to be nearly 100% of one of the > CPU's cores). This doesn't show up in task manager's processes: all of > those percentages are very low. Thank God I have two cores, or I'd be > totally up the creek: the juddering delays are bad enough as it is. > > I got hold of the http://www.sysinternals.com/ Process Explorer and that > shows that it's almost entirely hardware interrupts. Maybe duff hardware > or a badly written driver? Still no luck in tracing the precise cause. > > It would be great if Process Explorer or some Microsoft diagnostic > actually showed which interrupt/s were being generated so frequently, so > that one could then trace that to a particular driver or piece of > hardware. > > Cheers, > eric t. >
My System Specs

12-16-2008	#2 (permalink)
Steve Thackery n/a posts	Re: [Resolved] Vista: high (45-50%) CPU usage due to hardware interrupts > I checked the disk with Start -- Run -- perfmon /res, to find that Quote: > SearchIndexer.exe had loads of entries and files open. Thanks for reporting back. Incidentally, MS claims that SearchIndexer runs with the lowest priorities for I/O and CPU, so although it uses the processor when you're not doing anything, Vista should stick it on the back burner as soon as you need the CPU. In theory, then, it shouldn't affect the responsiveness or user experience. Personally, I love the facility to find any text string in any indexed file in less than a second - I use it all the time. So I really like Vista's new SearchIndexer and wouldn't dream of turning it off. Furthermore, if you wait a few days it quietens right down anyway. SteveT
My System Specs

07-05-2009	#3 (permalink)
pcbilski Vista 64 Ultimate 21 posts	Re: [Resolved] Vista: high (45-50%) CPU usage due to hardware interrupts I was having the same problem AFTER a fresh install, narrowed it down to Marvell 61xx RAID driver (which was the latest), just disabled the device and back to normal, but really irritating!
My System Specs

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