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I discovered that svhost.exe process is using almost 50% of my CPU time when computer was almost idle - I was downloading big file with USB 3G modem with 80kB/s speed.
I have relatively fast CPU (Intel Core 2 Duo 2.5GHz T9300, it does SuperPi 1M benchmark in 17 seconds).
To find reason I was turning off services related with svhost one by one. Finally, when I turned off Internet Connection Sharing service my "idle" CPU load dropped to normal (0-1%).
Im using Internet Connection Sharing sometimes to share internet from USB modem to other computer connected with ethernet, but when I had 50% load there was no network activity at all and I had my network disconnected.
What is wrong with my Internet Connection Sharing service?
Kamil
Posted 2014-09-05T11:01:07.987
Reputation: 2 524
What operating system? Does this happen with a minimal boot configuration? – Ramhound – 2014-09-05T11:37:23.970
It's Windows 7. I think minimal boot configuration will not start ICS, so... It will not happen I guess. – Kamil – 2014-09-05T17:16:21.380
The T9300 is an ancient CPU. That said, it shouldn't take 50% CPU to do this. Curious, are you using the latest drivers for your USB modem? – ChrisInEdmonton – 2014-09-05T17:17:59.210
@Kamil - You can start it manually. The point is to rule out everything except ICS. – Ramhound – 2014-09-05T18:13:11.900
@Ramhound Yea, I know I can control ICS manually, but I asked because I want to find reason. – Kamil – 2014-09-05T20:59:24.840
@ChrisInEdmonton I know thats not latest i7, but it is really fast cpu. For single or two core applications T9xxx series is compareable to latest AMD processors overclocked to 4Ghz+. I guess im not using latest modem drivers, I will try to update drivers. – Kamil – 2014-09-05T21:00:43.527
I am trying to get you to do troubleshooting. But I can't determine the cause if you don't at least try what I am asking.' – Ramhound – 2014-09-05T22:19:29.877
try updating the network card drivers – magicandre1981 – 2014-09-06T05:45:12.393
Many internet-related things will practically kill that CPU. The way they are now, it's inevitable. Good thing it's not a single core, as it would be on 100% load. – Overmind – 2017-10-26T05:43:19.010