Re: How do I sample kernel_task?
Re: How do I sample kernel_task?
- Subject: Re: How do I sample kernel_task?
- From: "Mark Munz" <email@hidden>
- Date: Mon, 19 Mar 2007 20:34:27 -0700
The symptoms are that the system becomes less and less responsive
until it just stops responding. The kernel_task %cpu goes to around
110%-120% in top before the system heads completely south with no UI
interaction.
The last time I tried it, remote login is still possible. But am not
sure if that was before it stopped responding all together or not.
I'm trying to help out another developer because the problem is 100%
reproducible on my machine. I would like to help them as the software
is completely unusable to me in its current state.
On 3/19/07, Justin C. Walker <email@hidden> wrote:
On Mar 19, 2007, at 19:35 , Mark Munz wrote:
> I'm trying to help track down a problem in a project where the CPU
> essentially gets locked up.
>
> In trying to sample kernel_task, I'm told I don't have rights to do
> such. I've tried using sudo sample, but still cannot sample it.
I don't believe that you can 'sample' the kernel because the
kernel_task is, well, in the kernel. I think you'll need to figure
out another approach ('sample' and friends assume that you are
dealing with a user-mode executable, I think).
Is the project a kernel extension?
Does the Activity Monitor CPU meter show that the CPU is red-lined?
Are you thrashing?
Can you ping the system, or log in remotely from another system?
Justin
--
Mark Munz
unmarked software
http://www.unmarked.com/
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