On 31 May 2013 02:37, Stratos Karafotis <stratosk@xxxxxxxxxxxx> wrote:
Ahh.. earlier mail got sent without me doing complete review :(
> diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
> +static void od_check_cpu(int cpu, unsigned int load)
> {
> struct od_cpu_dbs_info_s *dbs_info = &per_cpu(od_cpu_dbs_info, cpu);
> struct cpufreq_policy *policy = dbs_info->cdbs.cur_policy;
> @@ -176,29 +170,17 @@ static void od_check_cpu(int cpu, unsigned int load_freq)
> dbs_info->freq_lo = 0;
>
> /* Check for frequency increase */
> - if (load_freq > od_tuners->up_threshold * policy->cur) {
> + if (load > od_tuners->up_threshold) {
Chances of this getting hit are minimal now.. I don't know if keeping
this will change anything now :)
> /* If switching to max speed, apply sampling_down_factor */
> if (policy->cur < policy->max)
> dbs_info->rate_mult =
> od_tuners->sampling_down_factor;
> dbs_freq_increase(policy, policy->max);
> return;
> - }
> -
> - /* Check for frequency decrease */
> - /* if we cannot reduce the frequency anymore, break out early */
> - if (policy->cur == policy->min)
> - return;
> -
> - /*
> - * The optimal frequency is the frequency that is the lowest that can
> - * support the current CPU usage without triggering the up policy. To be
> - * safe, we focus 10 points under the threshold.
> - */
> - if (load_freq < od_tuners->adj_up_threshold
> - * policy->cur) {
> + } else {
> + /* Calculate the next frequency proportional to load */
> unsigned int freq_next;
> - freq_next = load_freq / od_tuners->adj_up_threshold;
> + freq_next = load * policy->max / 100;
Rafael asked why you believe this is the right formula and I really couldn't
find an appropriate answer to that, sorry :(
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