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    [PATCH] sched: mc/smt power savings sched policy · 5c45bf27
    Siddha, Suresh B 提交于
    sysfs entries 'sched_mc_power_savings' and 'sched_smt_power_savings' in
    /sys/devices/system/cpu/ control the MC/SMT power savings policy for the
    scheduler.
    
    Based on the values (1-enable, 0-disable) for these controls, sched groups
    cpu power will be determined for different domains.  When power savings
    policy is enabled and under light load conditions, scheduler will minimize
    the physical packages/cpu cores carrying the load and thus conserving
    power(with a perf impact based on the workload characteristics...  see OLS
    2005 CMP kernel scheduler paper for more details..)
    Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Nick Piggin <nickpiggin@yahoo.com.au>
    Cc: Con Kolivas <kernel@kolivas.org>
    Cc: "Chen, Kenneth W" <kenneth.w.chen@intel.com>
    Cc: "David S. Miller" <davem@davemloft.net>
    Signed-off-by: NAndrew Morton <akpm@osdl.org>
    Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
    5c45bf27
sched.h 46.0 KB