Windows 8.1 high CPU load

[insanecorp]

I'm on Windows 8.1 Enterprise right now.

And I having hight CPU load last 2 days by svchost.

How could I discover what exactly uses CPU?

[MagicAndre1981]

install the WPT and run the xperf commands from this topic:

http://www.msfn.org/board/index.php?showtopic=140264

[insanecorp]

I didn't found 'CPU sampling per CPU' graph, but I found that Windows Driver Foundation service is handling about 30% permanently, and sometimes grows up to 60%.

[insanecorp]

I have uploaded collected xperf dump to db: https://dl.dropboxusercontent.com/u/46058969/latency.etl

Maybe you could find something.

[MagicAndre1981]

the svchost.exe CPU usage comes from Superfetch.

But the main issue, is the sdclt.exe which is started and stopped very often. This is a know bug in 8.1. Open the task scheduler go to WindwosBackup and DISABLE the "ConfigNotitfication" Task

[insanecorp]

Ok, I will disable this task, and also I'm thinking about disabling Superfetsh - my system is installed on Intel SSD and as I remember Intel recomended to disable Superfetch with their SSD, or I should not?

Another thing I'm thinking about: Windows Driver Foundation. That is what ProcessExplorer shows mostly all the time: http://take.ms/yz9RM

[helmutcheese]

That is a myth due to peeps claiming it can wear out a SSD.

System memory is still far faster than any SSD and unused Memory is wasted so why not use it added to the fact caching only reads from the HDD/SSD not writes and SSD's do not wear from reads only writes.

Even the 1st DDR memory from 2001 is faster than 99% of todays SSD's at 2100MB/s for DDR266 (PC2100).

Windows 7SP1 (AFAIR) onwards does not disable SuperFetch at install on detection of a SSD (or at least never did for me) I think before SP1 it did but never had a SDD then and I always install from a Win 7 SP1 image on my SSD.

Windows Driver Foundation uses my CPU a lot taking the CPU out of 1600MHZ idle mode up to 5GHZ.

Edited December 19, 2013 by helmutcheese

[MagicAndre1981]

disable the task and capture a new trace if you still have issues.

[BlackShads]

Hi Andre! Today I was playing a game via Steam, and suddenly my frame dropped to 10. I opened up task manager, and sure enough, svchost.exe was eating up my RAM and CPU. I clicked search online and came across the thread on Microsoft, clicked on your profile, and that directed me here. Anywho, I followed the instructions and uploaded the highCPUUsage.etl to dropbox ( https://www.dropbox.com/s/izl1t2qegjawzrr/highCPUUsage.7z ). Upon restart, I opened up task manager again, and svchost.exe was eating 100% of my disk as well. Could you please help me resolve this? Thanks!

[MagicAndre1981]

the trace is corrupted. Don't run other tools like ProcessExplorer, TaskManager, LatencyMon or Resource Monitor the same time.

[BlackShads]

How about this one? https://www.dropbox.com/s/izl1t2qegjawzrr/highCPUUsage.7z

It wasn't really using a ton of resources when I took this one, though. It goes on and off like a light. :>

If you need, I'll take another when it is.

Edited January 22, 2014 by BlackShads

[MagicAndre1981]

this trace is fine. CPU is idle for 99%. Capture the trace when you have the issue.

[lshv]

Please would you mind looking at my etl?

Thanks a lot for your help!

https://drive.google.com/file/d/0B3HuZtfFCl1Ubm5IS1MxYmJKVmc/edit?usp=sharing

[MagicAndre1981]

you also have the sdclt.exe bug.

[lshv]

Thanks a lot Andre, CPU down to 5% - fantastic you're a lifesaver.