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08.21.2006 at 12:09PM PDT, ID: 21962003
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7.4

__kernel_vsyscall what is it ?

Asked by mxjijo in Linux Programming

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Hello experts..
        I'm trying to narrow down a problem. I have a process running 24 threads in a thread pool. Operation is typical - whenever a message is available, one of these threads picks up the msg and processes it. We also have a manager thread, monitoring all these threads. The message processing is supposed to get compleated within certain time. If any thread takes more than that time, the monitor thread restarts the process. - Well, everything works as expected. But now we have "some" messages consistantly causing restarts and I'm trying to narrow it down.

        I want to see what was a thread doing when this happens. One thing I tried is to do a foreful coredump before the restart. This way I can check the stack trace of all thread and one of them would be the culprit. So I got the coredump and surprosingly most of the threads are poingting to __kernel_vsyscall. I always have message backlog,  meaning: all threads in the threadpool are supposed to be busy processing messages.

        I'm not a linux expert. How what does __kernel_vsyscall mean ? does it mean the thread is waiting ?

Any hints would help..Start Free Trial
[+][-]08.22.2006 at 12:25AM PDT, ID: 17361635

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[+][-]08.31.2006 at 10:10PM PDT, ID: 17434761

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Zone: Linux Programming
Tags: __kernel_vsyscall
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Solution Provided By: ronan_40060
Participating Experts: 2
Solution Grade: B
 
 
[+][-]09.26.2006 at 03:21PM PDT, ID: 17606061

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