Re: [ANNOUNCE][RFC] PlugSched-6.4 for 2.6.18-rc2

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Al Boldi wrote:
Peter Williams wrote:
This version removes the hard/soft CPU rate caps from the SPA schedulers.

A patch for 2.6.18-rc2 is available at:

<http://prdownloads.sourceforge.net/cpuse/plugsched-6.4-for-2.6.18-rc2.pat
ch?download>

Very Brief Documentation:

You can select a default scheduler at kernel build time.  If you wish to
boot with a scheduler other than the default it can be selected at boot
time by adding:

cpusched=<scheduler>

Any reason dynsched couldn't be merged with plugsched?

None that I know of (but I'm not familiar with dynsched). Patches to add it to the mix would be accepted and once in I would try to keep it in step with kernel changes.


to the boot command line where <scheduler> is one of: ingosched,
ingo_ll, nicksched, staircase, spa_no_frills, spa_ws, spa_svr, spa_ebs
or zaphod.  If you don't change the default when you build the kernel
the default scheduler will be ingosched (which is the normal scheduler).

The scheduler in force on a running system can be determined by the
contents of:

/proc/scheduler

It may be really great, to allow schedulers perPid parent, thus allowing the stacking of different scheduler semantics. This could aid flexibility a lot.

I'm don't understand what you mean here.  Could you elaborate?


Worth a try, and should be easy to implement.

Control parameters for the scheduler can be read/set via files in:

/sys/cpusched/<scheduler>/

Thanks for the most important out-of-tree patch that makes 2.6 reasonable.

My pleasure,
Peter
--
Peter Williams                                   [email protected]

"Learning, n. The kind of ignorance distinguishing the studious."
 -- Ambrose Bierce
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