Waking from sleep - one core goes 100% load!

benko · 15 Mar 2012

I have this problem for a long time, today I decided to kill windows, and put a completely fresh setup. But the problem still persist.

I believe the problem lies in GPU drivers, not sure whatever it is an Intel or Nvidia, but one of these is a problem for me.

So, when I installed fresh windows the sleep option was dimmed, so I couldn't get to sleep, as I installed GPU drivers, sleep option was enabled, but than there is the problem described above. No, it's not a windows issue, same problem is with Windows 8!

Looks like "System Interupts" is using 18% CPU - whatever that is, it's using 1 core.

benko · 17 Mar 2012

Anybody

**cluberti** · 18 Mar 2012

Note that this is actually something seen with network drivers that don't actually support RSS properly - when the computer resumes from a sleep event (sleep or hibernate), one CPU can get completely used by the driver (which normally can spread the load across at least 4 CPUs to do RSS scheduling). If you disable the network cards in the machine (start > ncpa.cpl) and pull the network cable (if it's wired), does the problem go away?

benko · 20 Mar 2012

cluberti said:

Note that this is actually something seen with network drivers that don't actually support RSS properly - when the computer resumes from a sleep event (sleep or hibernate), one CPU can get completely used by the driver (which normally can spread the load across at least 4 CPUs to do RSS scheduling). If you disable the network cards in the machine (start > ncpa.cpl) and pull the network cable (if it's wired), does the problem go away?

a-a, just tried, does not help

**cluberti** · 20 Mar 2012

OK, a more definitive test - if you disable the network cards and reboot to boot without network connectivity, does the problem still occur if you sleep and then wake? If it still occurs, then we may need to suggest some additional debugging.

benko · 21 Mar 2012

Still same

**cluberti** · 21 Mar 2012

OK, so I think we can be fairly certain it's not the network driver at this point. Next question - are you willing to crash your machine "for science"?

benko · 21 Mar 2012

Always :)

Whatever you want, I will do :)

**cluberti** · 31 Mar 2012

Unfortunately, you've uploaded a corrupted dump (probably because you split it). I can't get anything from it, so I'll need for you to upload it again as a single file. If it's too big, I can create some space on my FTP for you.

benko · 01 Apr 2012

Hmm, I just downloaded it and tested, it extracts just fine!