[gentoo-user] Re: gigabyte mobo latency

[James]

thegeezer <thegeezer <at> thegeezer.net> writes:


> there is a little more here
> http://gentoo-en.vfose.ru/wiki/Improve_responsiveness_with_cgroups
> which will allow you to script creating a cgroup with the processID of
> an interactive shell, that you can start from to help save hunting down
> all the threads spawned by chrome.
> you can then do fun stuff with echo $$ >
> /sys/fs/cgroup/cpu/high_priority/tasks

Yea this is cool. But when it's a cluster, with thousands of processes
this seem to be limited by the manual parsing and CLI actions that
are necessary for large/busy environments. (We shall see).

> hopefully this will give you a bit more control over all of that though


Gmane mandates that the previous lines be culled. That said; you have given
me much to think about, test and refine. 

In /sys/fs/cgroup/cpu   I have:

cgroup.clone_children  cgroup.procs  cpu.shares      release_agent
cgroup.event_control cgroup.sane_behavior notify_on_release  tasks

So I'll have to research creating and priotizing dirs like "high_priority"


I certainly appreciate your lucid and direct explanations.
Let me play with this a bit and I'll post back when I munge things
up.....   Are there any "graphical tools" for adjusting and managing
cgroups?  Surely when I apply this to the myriad of things running
on my mesos+spark cluster I'm going to need a well thoughout tool
for cgroup management, particularly on memory resources organization
and allocations as spark is an "in_memory" environment that seems 
sensitive to OOM issues of all sorts.

thx,
James