Listing a Linux process’s threads¶
Introduction¶
This page presents the commands I’ve used to “see” the threads of a Linux process. They’re invocations of programs ps, top or chrt.
With ps¶
The following ps commands provide information about the threads of a
process with a given PID:
ps -T -p <PID>
ps -L -p <PID>
ps -mo pid,tid,%cpu,psr,comm -p <PID>
With top¶
The following command provides a dynamic real-time view of the threads of a process with a given PID:
top -H -p <PID>
Add a -n 1 option to have just a non dynamic listing:
top -H -n 1 -p <PID>
With the -b switch (Batch mode), there is no highlighting in the output,
which is preferable when you redirect the output to another program or to a
file:
top -H -bn 1 -p <PID>
You can control the top output width with the -w switch:
top -w 50 -H -bn 1 -p <PID>
With chrt¶
Using chrt you can see the scheduling policy and the priority of the
threads of a process with a given PID:
chrt -a -p <PID>
