Ubuntu
linux package

  1. Bug #177895
  2. Comment #28

Comment 28 for bug 177895

Revision history for this message
Colin Ian King (colin-king) wrote :

Enabled the CONFIG_SCHED_MC option to allow multi-core scheduling for i386, ia64 and sparc (it is already enabled for x86_64) to allow one to turn on multi core power savings by:

echo 1 > /sys/devices/system/cpu/sched_mc_power_savings

Although grep CONFIG_SCHED_MC /boot/config-2.6.24-5-generic does yields CONFIG_SCHED_MC=y, it seems that it isn't actually enabled.

Rebuilt (2.6.24-7.13) with CONFIG_SCHED_MC enabled. When tested on i386 platform, on an "idle" dual core Centrino powertop shows a drop of "Rescheduling Interrupts" from 11% (not enabled) to ~4% (enabled), shows minor power saving improvement.