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PM / devfreq: bw_hwmon: Remove unused tunables and disable some by default

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With the rewrite of the algorithm, some tunables are not used. Remove those
tunables. Other tunables don't make a lot of sense to be turned on by
default. Change their default state to be disabled.

Change-Id: I228d275a21765986a7117b335a669deebf590f29
Signed-off-by: Saravana Kannan <skannan@codeaurora.org>
This commit is contained in:
Saravana Kannan 2015-07-30 19:39:25 -07:00 • committed by David Keitel
parent ee91d88179
commit 1610191072
1 changed files with 12 additions and 18 deletions
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30
drivers/devfreq/governor_bw_hwmon.c
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@ -35,7 +35,6 @@
#define NUM_MBPS_ZONES 10
struct hwmon_node {
unsigned int tolerance_percent;
unsigned int guard_band_mbps;
unsigned int decay_rate;
unsigned int io_percent;
@ -183,11 +182,9 @@ static unsigned int bytes_to_mbps(long long bytes, unsigned int us)
return bytes;
}
static unsigned int mbps_to_bytes(unsigned long mbps, unsigned int ms,
unsigned int tolerance_percent)
static unsigned int mbps_to_bytes(unsigned long mbps, unsigned int ms)
{
mbps *= (100 + tolerance_percent) * ms;
mbps /= 100;
mbps *= ms;
mbps = DIV_ROUND_UP(mbps, MSEC_PER_SEC);
mbps *= SZ_1M;
return mbps;
@ -393,7 +390,7 @@ static unsigned long get_bw_and_set_irq(struct hwmon_node *node,
* (100 + node->up_thres)) / 100;
node->down_wake_mbps = 0;
thres = mbps_to_bytes(max(MIN_MBPS, req_mbps / 2),
node->sample_ms, 0);
node->sample_ms);
} else {
/*
* Up wake vs down wake are intentionally a percentage of
@ -404,7 +401,7 @@ static unsigned long get_bw_and_set_irq(struct hwmon_node *node,
*/
node->up_wake_mbps = (req_mbps * (100 + node->up_thres)) / 100;
node->down_wake_mbps = (meas_mbps * node->down_thres) / 100;
thres = mbps_to_bytes(meas_mbps, node->sample_ms, 0);
thres = mbps_to_bytes(meas_mbps, node->sample_ms);
}
node->bytes = hw->set_thres(hw, thres);
@ -673,7 +670,6 @@ static int devfreq_bw_hwmon_get_freq(struct devfreq *df,
return 0;
}
gov_attr(tolerance_percent, 0U, 30U);
gov_attr(guard_band_mbps, 0U, 2000U);
gov_attr(decay_rate, 0U, 100U);
gov_attr(io_percent, 1U, 100U);
@ -693,7 +689,6 @@ gov_attr(low_power_delay, 1U, 60U);
gov_list_attr(mbps_zones, NUM_MBPS_ZONES, 0U, UINT_MAX);
static struct attribute *dev_attr[] = {
&dev_attr_tolerance_percent.attr,
&dev_attr_guard_band_mbps.attr,
&dev_attr_decay_rate.attr,
&dev_attr_io_percent.attr,
@ -819,24 +814,23 @@ int register_bw_hwmon(struct device *dev, struct bw_hwmon *hwmon)
node->attr_grp = &dev_attr_group;
}
node->tolerance_percent = 10;
node->guard_band_mbps = 100;
node->decay_rate = 90;
node->io_percent = 34;
node->io_percent = 16;
node->low_power_ceil_mbps = 0;
node->low_power_io_percent = 34;
node->low_power_delay = 20;
node->low_power_io_percent = 16;
node->low_power_delay = 60;
node->bw_step = 190;
node->sample_ms = 2;
node->up_scale = 250;
node->sample_ms = 50;
node->up_scale = 0;
node->up_thres = 10;
node->down_thres = 0;
node->down_count = 3;
node->hist_memory = 20;
node->hist_memory = 0;
node->hyst_trigger_count = 3;
node->hyst_length = 10;
node->hyst_length = 0;
node->idle_mbps = 400;
node->mbps_zones[0] = 100000;
node->mbps_zones[0] = 0;
node->hw = hwmon;
mutex_lock(&list_lock);