cpulimit is not sending SIGCONT signal to the processes

[rammohanganap]

Hi,

I am seeing this intermittent behavior in rocky8.9 where i suspect cpulimit is not sending SIGCONT to the child proc and child processes is been hung there for days. Any idea what could be the reason ? How do debug this issue?

cmd: cpulimit -l 15 aws s3 cp foo bar

and there is no load on the system and have enough cpu cycles. If i send SIGCONT to the pid then the processes is getting executed successfully. We never saw this behavior in centos7.

 sudo strace -p 2558819
strace: Process 2558819 attached
--- stopped by SIGSTOP ---

version: cpulimit-0.2-13.20151118gitf4d2682.el8.x86_64

[HiGarfield]

You can try my modified version with the errors fixed: https://github.com/HiGarfield/cpulimit.

I also provided an executable; just extract it and run it.

wget https://github.com/user-attachments/files/17942073/cpulimit.tar.gz
tar -zxvf cpulimit.tar.gz
./cpulimit -l 15 aws s3 cp foo bar

cpulimit.tar.gz

[rammohanganap]

@HiGarfield thanks for the quick response, is this a known issue with cpulimit in rocky8/rhel8 OS? any references related to this issue?

[HiGarfield]

@rammohanganap In recent years, I have discovered some bugs in the processes of process name matching, reading process information, sending signals, and handling multithreading concurrency. I made many modifications. Please refer to the commits in my forked repository for details. https://github.com/HiGarfield/cpulimit

[HiGarfield]

After testing, the cpulimit in my repo works properly on Rocky Linux.