| From | Mark Langsdorf <> | Subject | [PATCH 3/6] cpufreq: tolerate inexact values when collecting stats | Date | Tue, 30 Oct 2012 16:04:13 -0500 |
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Allow frequency values to vary by +/-5000 Hz when collecting stats.
Signed-off-by: Mark Langsdorf <mark.langsdorf@calxeda.com> Cc: cpufreq@vger.kernel.org Cc: Rafael J. Wysocki <rjw@sisk.pl>
--- drivers/cpufreq/cpufreq_stats.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c index 3998316..4e2ea7e 100644 --- a/drivers/cpufreq/cpufreq_stats.c +++ b/drivers/cpufreq/cpufreq_stats.c @@ -158,9 +158,11 @@ static struct attribute_group stats_attr_group = { static int freq_table_get_index(struct cpufreq_stats *stat, unsigned int freq) { int index; - for (index = 0; index < stat->max_state; index++) - if (stat->freq_table[index] == freq) + for (index = 0; index < stat->max_state; index++) { + if ((stat->freq_table[index] < (freq + 5000)) && + (stat->freq_table[index] > (freq - 5000))) return index; + } return -1; } @@ -251,6 +253,8 @@ static int cpufreq_stats_create_table(struct cpufreq_policy *policy, spin_lock(&cpufreq_stats_lock); stat->last_time = get_jiffies_64(); stat->last_index = freq_table_get_index(stat, policy->cur); + if (stat->last_index > stat->max_state) + stat->last_index = stat->max_state - 1; spin_unlock(&cpufreq_stats_lock); cpufreq_cpu_put(data); return 0; -- 1.7.11.7
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