Difference between revisions of "User:Unikum/Ulatencyd"

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Line 34: Line 34:
 
To verify that it works:
 
To verify that it works:
 
  ulatency tree
 
  ulatency tree
 +
 +
And should get a nice tree like structure like this:
 +
/sys/fs/cgroup/cpu
 +
└─┬»cpu«
 +
  ├ 2 kthreadd
 +
  ├─┬»s_ul«
 +
  │ └ 4975 ulatencyd
 +
  ├─┬»sys_bg«
 +
  │ └ 1928 cron
 +
  ├─┬»sys_idle«
 +
  │ └ 3036 preload
  
 
== Configuration ==
 
== Configuration ==

Revision as of 14:11, 7 April 2011

Ulatency is a daemon that controls how the Linux kernel will spend it's resources on the running processes. It uses dynamic cgroups to give the kernel hints and limitations on processes.

It strongly supports the lua scripting language for writing rules and the scheduler code.

Installation

Kernel options requires:

PROC_EVENTS=y
CONFIG_CGROUPS=y
CONFIG_CGROUP_FREEZER=y
CONFIG_CGROUP_DEVICE=y
CONFIG_CGROUP_MEM_RES_CTLR=y
CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y
CONFIG_CGROUP_MEM_RES_CTLR_SWAP_ENABLED=y
CONFIG_CGROUP_SCHED=y
CONFIG_FAIR_GROUP_SCHED=y
CONFIG_RT_GROUP_SCHED=y
CONFIG_BLK_CGROUP=y
CONFIG_CFQ_GROUP_IOSCHED=y

It is provided both in ArchAudio/testing repository and AUR:

yaourt -S ulatencyd

To start ulatencyd:

# /etc/rc.d/ulatencyd start

If you want ulatencyd start on boot add ulatencyd in DAEMONS section in /etc/rc.conf.

To verify that it works:

ulatency tree

And should get a nice tree like structure like this:

/sys/fs/cgroup/cpu
└─┬»cpu«
  ├ 2 kthreadd
  ├─┬»s_ul«
  │ └ 4975 ulatencyd
  ├─┬»sys_bg«
  │ └ 1928 cron
  ├─┬»sys_idle«
  │ └ 3036 preload

Configuration

Some settings are adjustable in /etc/ulatencyd/ulatencyd.conf and the cgroups that will be used can be changed in /etc/ulatencyd/cgroups.conf

See also