mire is a program to slow down another program running on Linux without changing the target program's source code.

When launched with the correct set of options, mire waits for the target program to begin.

Once the target process (identified by name) is found, mire attaches to each of its threads using the Linux ptrace system call. From this point, for a pre-configured time, the traced program is interrupted for a fixed duration and then allowed to run for another fixed duration. The result is that the target program slows down. The following command line options are supported:

Usage: mire [OPTIONS] --process-name <PROCESS_NAME>

Options:
      --throttle-duration-ms <THROTTLE_DURATION_MS>            [default: 900]
      --free-run-duration-ms <FREE_RUN_DURATION_MS>            [default: 300]
      --total-control-duration-ms <TOTAL_CONTROL_DURATION_MS>  [default: 120000]
      --wait-for-process
      --process-name <PROCESS_NAME>
      --cmd-line-pattern <CMD_LINE_PATTERN>
  -h, --help                                                   Print help
  -V, --version                                                Print version

The process name is the name of the target program which is subjected to an exact match. The throttle duration is milliseconds for which the target is paused per cycle. The free run duration is the duration for which the program runs freely per cycle. Cycles are repeated for total control duration.

A command line pattern can be passed for fine-tuning the process match.