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[CPUFREQ] ondemand/conservative: deprecate sampling_rate{min,max}

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The same info can be obtained via the transition_latency sysfs file

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Dave Jones <davej@redhat.com>
This commit is contained in:
Thomas Renninger
2009-02-04 11:54:04 +01:00
committed by Dave Jones
parent 57f4fa6991
commit 9411b4ef7f
3 changed files with 40 additions and 2 deletions
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10
Documentation/cpu-freq/governors.txt
View File

@@ -119,8 +119,14 @@ want the kernel to look at the CPU usage and to make decisions on
what to do about the frequency. Typically this is set to values of what to do about the frequency. Typically this is set to values of
around '10000' or more. around '10000' or more.
show_sampling_rate_(min|max): the minimum and maximum sampling rates show_sampling_rate_(min|max): THIS INTERFACE IS DEPRECATED, DON'T USE IT.
available that you may set 'sampling_rate' to. You can use wider ranges now and the general
cpuinfo_transition_latency variable (cmp. with user-guide.txt) can be
used to obtain exactly the same info:
show_sampling_rate_min = transtition_latency * 500 / 1000
show_sampling_rate_max = transtition_latency * 500000 / 1000
(divided by 1000 is to illustrate that sampling rate is in us and
transition latency is exported ns).
up_threshold: defines what the average CPU usage between the samplings up_threshold: defines what the average CPU usage between the samplings
of 'sampling_rate' needs to be for the kernel to make a decision on of 'sampling_rate' needs to be for the kernel to make a decision on

15
drivers/cpufreq/cpufreq_conservative.c
View File

@@ -140,11 +140,26 @@ static struct notifier_block dbs_cpufreq_notifier_block = {
/************************** sysfs interface ************************/ /************************** sysfs interface ************************/
static ssize_t show_sampling_rate_max(struct cpufreq_policy *policy, char *buf) static ssize_t show_sampling_rate_max(struct cpufreq_policy *policy, char *buf)
{ {
static int print_once;
if (!print_once) {
printk(KERN_INFO "CPUFREQ: conservative sampling_rate_max "
"sysfs file is deprecated - used by: %s\n",
current->comm);
print_once = 1;
}
return sprintf(buf, "%u\n", MAX_SAMPLING_RATE); return sprintf(buf, "%u\n", MAX_SAMPLING_RATE);
} }
static ssize_t show_sampling_rate_min(struct cpufreq_policy *policy, char *buf) static ssize_t show_sampling_rate_min(struct cpufreq_policy *policy, char *buf)
{ {
static int print_once;
if (!print_once) {
printk(KERN_INFO "CPUFREQ: conservative sampling_rate_max "
"sysfs file is deprecated - used by: %s\n", current->comm);
print_once = 1;
}
return sprintf(buf, "%u\n", MIN_SAMPLING_RATE); return sprintf(buf, "%u\n", MIN_SAMPLING_RATE);
} }

17
drivers/cpufreq/cpufreq_ondemand.c
View File

@@ -21,6 +21,7 @@
#include <linux/hrtimer.h> #include <linux/hrtimer.h>
#include <linux/tick.h> #include <linux/tick.h>
#include <linux/ktime.h> #include <linux/ktime.h>
#include <linux/sched.h>
/* /*
* dbs is used in this file as a shortform for demandbased switching * dbs is used in this file as a shortform for demandbased switching
@@ -203,11 +204,27 @@ static void ondemand_powersave_bias_init(void)
/************************** sysfs interface ************************/ /************************** sysfs interface ************************/
static ssize_t show_sampling_rate_max(struct cpufreq_policy *policy, char *buf) static ssize_t show_sampling_rate_max(struct cpufreq_policy *policy, char *buf)
{ {
static int print_once;
if (!print_once) {
printk(KERN_INFO "CPUFREQ: ondemand sampling_rate_max "
"sysfs file is deprecated - used by: %s\n",
current->comm);
print_once = 1;
}
return sprintf(buf, "%u\n", MAX_SAMPLING_RATE); return sprintf(buf, "%u\n", MAX_SAMPLING_RATE);
} }
static ssize_t show_sampling_rate_min(struct cpufreq_policy *policy, char *buf) static ssize_t show_sampling_rate_min(struct cpufreq_policy *policy, char *buf)
{ {
static int print_once;
if (!print_once) {
printk(KERN_INFO "CPUFREQ: ondemand sampling_rate_min "
"sysfs file is deprecated - used by: %s\n",
current->comm);
print_once = 1;
}
return sprintf(buf, "%u\n", MIN_SAMPLING_RATE); return sprintf(buf, "%u\n", MIN_SAMPLING_RATE);
} }