Re: How to know number of user threads from /proc

[Pravin Shedage <pravinshedage2008@xxxxxxxxx>]

Hi,

You will get Number of Threads info your process is created is in /proc/pid/status

root@kernel:/proc# ls  /proc/1951/task/ 
1951  1957  2162
root@kernel:/proc# 
root@kernel:/proc#  cat /proc/1951/status | grep -i Threads:
Threads:    3
root@kernel:/proc# 
root@kernel:/proc# cat /proc/self/status | grep -i Threads:
Threads:    1
root@kernel:/proc#


Thanks & Regards,
    PraviN

On Sun, Feb 26, 2012 at 11:11 PM, Dave Hylands <dhylands@xxxxxxxxx> wrote:

Hi Kris,

On Sun, Feb 26, 2012 at 3:15 AM, emani murali <murali132@xxxxxxxxx> wrote:
> Hi,
>  I'm running a multithreaded program in OpenMP on linux to study CPU
> overloading. As the subject says, I need to know the number of threads this
> program creates (assuming in this case, number of threads in this program is
> same as the number of user threads) from the information kernel provides.
>
> I'm looking something similar to run-queue length from "sar -q 0" that gives
> me exact picture of number of user threads. From the implementation of sar,
> I found that this information is fetched from /proc filesystem.
>
> So is there anyway that /proc fs gives me the number of threads running in
> the system, apart from /proc/cpuinfo that gives me a static information of
> existing CPUs.

There is a directory in /proc/PID/task for each thread contained
within a process.

--
Dave Hylands
Shuswap, BC, Canada
http://www.davehylands.com

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-- 
Thanks & Regards,
---------PraviN---------


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