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тАО04-27-2004 07:55 PM
тАО04-27-2004 07:55 PM
I am not sure what the kernel idle process does. I have this process using up to 100% cpu time. Is this normal? It may be a stupid question, but can anybody tell me what the kerenel idle process is there for?
Solved! Go to Solution.
3 REPLIES 3
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тАО04-27-2004 11:58 PM
тАО04-27-2004 11:58 PM
Solution
Kernel_idle is a standard OS process that should (must) be present on all
of your Tru64 UNIX systems.
If the system is doing nothing at all, then kernel_idle will absolutely be the top process. The top thread will be idle_thread. Cpus *cannot* be quiescent during periods of inactivity. So the kernel runs idle_thread to keep it happy. This does not indicate a performance problem. Any thread with real work to do will *always* preemp idle_thread.
kernel_idle tasks can be divided into 2 catagories:
system work - such as simple_lock() where the kernel is doing useful work on behalf processes that need things done, and
idle time - when the kernel has no work to do, so it runs the idle_thread.
of your Tru64 UNIX systems.
If the system is doing nothing at all, then kernel_idle will absolutely be the top process. The top thread will be idle_thread. Cpus *cannot* be quiescent during periods of inactivity. So the kernel runs idle_thread to keep it happy. This does not indicate a performance problem. Any thread with real work to do will *always* preemp idle_thread.
kernel_idle tasks can be divided into 2 catagories:
system work - such as simple_lock() where the kernel is doing useful work on behalf processes that need things done, and
idle time - when the kernel has no work to do, so it runs the idle_thread.
Help() { FirstReadManual(urgently); Go_to_it;; }
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тАО04-28-2004 03:30 AM
тАО04-28-2004 03:30 AM
Re: Kernel Idle
Hello,
It does remember M$ Windows System "Idle Process" !
Since NT was developped by the creator of OpenVMS, is the way of thinking OS idleness a DEC legacy ?
;D
Nicolas
It does remember M$ Windows System "Idle Process" !
Since NT was developped by the creator of OpenVMS, is the way of thinking OS idleness a DEC legacy ?
;D
Nicolas
All different, all Unix
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тАО04-28-2004 05:02 AM
тАО04-28-2004 05:02 AM
Re: Kernel Idle
You may have a hardware problem. On one of our ES45s I noticed [kernel idle] at 100%. Further investigation showed that one of the 2 NICs in a NetRAIN device went bad. Use this command to look at all the threads running under [kernel idle]:
# ps -Am -O THREAD
This may help identify the problem. We were also experiencing poor response. How's the response on your system?
We're running Tru64 V5.1B PK3.
Vic
# ps -Am -O THREAD
This may help identify the problem. We were also experiencing poor response. How's the response on your system?
We're running Tru64 V5.1B PK3.
Vic
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