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Top Forums Programming Count Number Of Threads in a Process Post 33161 by S.P.Prasad on Wednesday 18th of December 2002 06:11:28 AM
Old 12-18-2002
Count Number Of Threads in a Process

I am trying to find out that how many number of threads are currently running or in any other state which is created by POSIX standard in a process.
First I have defined a variable called proc_var of type proc defined in sys/proc.h.Next I open up the dir /proc and per directory wise I do an ioctl operation with cmd type PIOCPSINFO and target as address space of proc_var. But when I print the value of the member variable p_lwpcnt of proc_var ( i am not sure wether i am reffering to the correct one ) , i get output '6488064' as its value.I found out that the process is a user created one and the code creates only four threads.
Kindly guide me how to find the correct number Threads and its details, currently executing in a process.
 

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PS(1)							      General Commands Manual							     PS(1)

NAME
ps, psu - process status SYNOPSIS
ps psu [ user ] DESCRIPTION
Ps prints information about processes. Psu prints only information about processes started by user (default $user). For each process reported, the user, process id, user time, system time, size, state, and command name are printed. State is one of the following: Moribund Process has exited and is about to have its resources reclaimed. Ready on the queue of processes ready to be run. Scheding about to be run. Running running. Queueing waiting on a queue for a resource. Wakeme waiting for I/O or some other kernel event to wake it up. Broken dead of unnatural causes; lingering so that it can be examined. Stopped stopped. Stopwait waiting for another process to stop. Fault servicing a page fault. Idle waiting for something to do (kernel processes only). New being created. Pageout paging out some other process. Syscall performing the named system call. no resource waiting for more of a critical resource. FILES
/proc/*/status SOURCE
/sys/src/cmd/ps.c /rc/bin/psu SEE ALSO
kill(1), db(1), ps(1), proc(3) PS(1)
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