On 2/9/2011 7:04 PM, Matt Helsley wrote: > On Tue, Feb 08, 2011 at 05:05:41PM -0800, jacob.jun.pan@xxxxxxxxxxxxxxx wrote: >> From: Jacob Pan<jacob.jun.pan@xxxxxxxxxxxxxxx> >> >> Freezer subsystem is used to manage batch jobs which can start >> stop at the same time. However, sometime it is desirable to let >> the kernel manage the freezer state automatically with a given >> duty ratio. >> For example, if we want to reduce the time that backgroup apps >> are allowed to run we can put them into a freezer subsystem and >> set the kernel to turn them THAWED/FROZEN at given duty ratio. >> >> This patch introduces two file nodes under cgroup >> freezer.duty_ratio_pct and freezer.period_sec >> >> Usage example: set period to be 5 seconds and frozen duty ratio 90% >> [root@localhost aoa]# echo 90> freezer.duty_ratio_pct >> [root@localhost aoa]# echo 5000> freezer.period_ms > I kept wondering how this was useful when we've got the "cpu" subsystem > because for some reason "duty cycle" made me think this was a scheduling > policy knob. In fact, I'm pretty sure it is -- it just happens to > sometimes reduce power consumption. > > Have you tried using the cpu cgroup subsystem's share to see if it can > have a similar effect? does the cpu cgroup system work on a 20 to 30 second time window? the objective is to have the CPU idle, without wakeups, for that long... (to save power) _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers
