[lkml]   [2005]   [Aug]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Subject[ANNOUNCE][RFC] PlugSched-6.1 for 2.6.13
This version contains a modified spa_ws scheduler with a more persistent 
bonus mechanism. Although the "bonus only at wake up" mechanism of the
original worked well on the first systems it was tested on (an old SMP
system and a 3GHz SMT system) subsequent tests on a 2GHz single
processor system were disappointing. (Apart from a bug in the original
implementation) the primary reason for this was that the X server was
not always able to complete its work in the first time slice after
waking and had to try and complete it without the benefit of the bonus
which causes obvious delays when the system is loaded. The new
mechanism is a simplification of the persistent interactive bonus
mechanism in zaphod.

A patch for 2.6.13 is available at:


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:


to the boot command line where <scheduler> is one of: ingosched,
nicksched, staircase, spa_no_frills, spa_ws 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:


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


Peter Williams

"Learning, n. The kind of ignorance distinguishing the studious."
-- Ambrose Bierce
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-08-31 02:51    [W:0.020 / U:1.920 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site