mruby-ionice

This is a binding for Linux system calls ioprio_set(2) , ioprit_get(2) . And it is compatible with ionice(1) .

install by mrbgems

• add conf.gem line to build_config.rb

MRuby::Build.new do |conf|

    # ... (snip) ...

    conf.gem :github => 'takumakume/mruby-ionice'
end

example

ioprio classes

from linux/ionice.h

IOnice::IOPRIO_CLASS_NONE  # => 0
IOnice::IOPRIO_CLASS_RT    # => 1
IOnice::IOPRIO_CLASS_BE    # => 2
IOnice::IOPRIO_CLASS_IDLE  # => 3

iopro who

from linux/ionice.h

IOnice::IOPRIO_WHO_PROCESS  # => 1
IOnice::IOPRIO_WHO_PGRP     # => 2
IOnice::IOPRIO_WHO_USER     # => 3

ionice get

# for process
IOnice::get(Process.pid)
# => { 'class' => IOnice::IOPRIO_CLASS_NONE }
IOnice::get(Process.pid)
# => { 'class' => IOnice::IOPRIO_CLASS_RT, 'priority' => 2 }

• for process

  IOnice::get(pid)
  IOnice::get(pid, IOnice::IOPRIO_WHO_PROCESS)

• for process group

  IOnice::get(pgid, IOnice::IOPRIO_WHO_PGRP)

• for uid

  IOnice::get(uid, IOnice::IOPRIO_WHO_USER)

ionice set

# for process
IOnice::set(Process.pid, IOnice::IOPRIO_CLASS_NONE)
IOnice::set(Process.pid, IOnice::IOPRIO_CLASS_IDLE)
IOnice::set(Process.pid, IOnice::IOPRIO_CLASS_BE, 7) # priority is 0..7
IOnice::set(Process.pid, IOnice::IOPRIO_CLASS_RT, 2) # priority is 0..7
# => true

• for process

  IOnice::set(pid, IOnice::IOPRIO_CLASS_BE, 2)
  IOnice::set(pid, IOnice::IOPRIO_CLASS_BE, 2, IOnice::IOPRIO_WHO_PROCESS)

• for process group

  IOnice::set(pgid, IOnice::IOPRIO_CLASS_BE, 2, IOnice::IOPRIO_WHO_PGRP)

• for uid

  IOnice::set(uid, IOnice::IOPRIO_CLASS_BE, 2, IOnice::IOPRIO_WHO_USER)

License

under the MIT License:

• see LICENSE file