UNIX for Dummies Questions & Answers

Bartus agreed and thanks !!! Is it correct to say everything listed under ulimit -a is for each process seperately?

Code:

ulimit -a
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 10
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 29995
virtual memory (kbytes, -v) unlimited

Also, can you confirm that the stack for a PID is the sum of the complete pmap output shared above or just the last two lines, becoz for a process not doing much the sum of the stack shows Total used stack memory is:4680

Below is my code:

Code:

stackmem="$(pmap $1 | grep stack | awk '{print $2}'| tr -d ' K')"
n=0
for stack in $stackmem
do
n=`expr $n + $stack`
done
echo "Total used stack memory is:$n"

I guess we may have to discard the stack with the tids [ stack tid=2 ]
while summing the total stack memory used by a PID.

It will be great if you could confirm/comment.

Regards,
Mohtashim

You can't discard stack segments with tid values as they are related to threads running as part of your process and as such are part of the process stack segments. I think you should increase the value in ulimit to allow your process to run with more stack segments. Another option is to redesign your application

From the getrlimit() man page: