On Sat, 22 Nov 2008, Bobby Heid wrote:
Hey again,
I am running Vista Business SP1 and for the past couple (could be longer) of
months now have been having an intermittent issue with one of the svchost
processes on my system.
What is happening is that my CPU jumps to about 48% utilization (I have HT
turned on, so it is probably really near 100%) for a period of time lasting
minutes to over ½ hour. Process explorer points out the svchost process
that hosts the DCOM Server Process Launcher (DCOMLaunch) and Plug and Play
(PlugPlay) processes. When looking at the threads in the svchost process,
there are usually two threads using all of the CPU, they are both
ntdll.dll!UserThreadStart.
In doing some research last night, I came across three threads that talk
about this issue:
1) A thread that seems to have something to do with the sound devices
and an enhancements tab on the configuration where you can turn off
enhancements. But others in the thread, and myself, do not have the
enhancements tab.
2) A thread that talks about HP printer software, which I have, but
nothing seems to point at this software.
3) A thread talking about VMware virtual network adapters. Someone
stated this: I figured out what the problem is: VMware virtual network
adaptors. The problem disappeared after disabling both of the virtual
adaptors. I am running VMware. While the high CPU usage was occurring
last night, I went everywhere I could think of and disabled VMware network
stuff, but nothing seemed to help.
svchost actually is a lot of things, you can most easilly figure out what
a given svchost process is actually running by running Process Explorer
and find the process that is using the high CPU time, then just hold your
mouse over the process and it'll have a tooltip that shows what other
processes that svchost process is handling.
(yes, I realize I'm very late to the conversation =)
Christopher Fisk
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