• Viresh Kumar's avatar
    cpufreq: governors: Avoid unnecessary per cpu timer interrupts · 031299b3
    Viresh Kumar authored
    Following patch has introduced per cpu timers or works for ondemand and
    conservative governors.
    
    	commit 2abfa876
    	Author: Rickard Andersson <rickard.andersson@stericsson.com>
    	Date:   Thu Dec 27 14:55:38 2012 +0000
    
    	    cpufreq: handle SW coordinated CPUs
    
    This causes additional unnecessary interrupts on all cpus when the load is
    recently evaluated by any other cpu. i.e. When load is recently evaluated by cpu
    x, we don't really need any other cpu to evaluate this load again for the next
    sampling_rate time.
    
    Some sort of code is present to avoid that but we are still getting timer
    interrupts for all cpus. A good way of avoiding this would be to modify delays
    for all cpus (policy->cpus) whenever any cpu has evaluated load.
    
    This patch does this change and some related code cleanup.
    Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
    Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
    031299b3
cpufreq_governor.c 11.3 KB