1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "helpers/helpers.h"
#include "cpufreq.h"
#include "acpi_cppc.h"
#define cppc_to_frequency(perf) (roundf(slope * (perf) + intercept))
void cppc_show_perf_and_freq(unsigned int cpu, int no_rounding)
{
int64_t nominal = acpi_cppc_get_data(cpu, NOMINAL_PERF);
int64_t nominal_freq = acpi_cppc_get_data(cpu, NOMINAL_FREQ) * 1000;
int64_t lowest = acpi_cppc_get_data(cpu, LOWEST_PERF);
int64_t lowest_freq = acpi_cppc_get_data(cpu, LOWEST_FREQ) * 1000;
unsigned long non_linear = acpi_cppc_get_data(cpu, LOWEST_NONLINEAR_PERF);
unsigned long highest = acpi_cppc_get_data(cpu, HIGHEST_PERF);
float slope, intercept;
/* do the optional freq fields look invalid? */
if (!nominal_freq || !lowest_freq || nominal == lowest)
return;
slope = (float)(nominal_freq - lowest_freq) / (nominal - lowest);
intercept = lowest_freq - slope * lowest;
printf(_(" CPPC limits:\n"));
printf(_(" Highest Performance: %lu. Maximum Frequency: "),
highest);
/*
* If boost isn't active, the cpuinfo_max doesn't indicate real max
* frequency.
*/
print_speed(cppc_to_frequency(highest), no_rounding);
printf(".\n");
printf(_(" Nominal Performance: %lu. Nominal Frequency: "),
acpi_cppc_get_data(cpu, NOMINAL_PERF));
print_speed(nominal_freq, no_rounding);
printf(".\n");
printf(_(" Lowest Non-linear Performance: %lu. Lowest Non-linear Frequency: "),
non_linear);
print_speed(cppc_to_frequency(non_linear), no_rounding);
printf(".\n");
printf(_(" Lowest Performance: %lu. Lowest Frequency: "),
acpi_cppc_get_data(cpu, LOWEST_PERF));
print_speed(lowest_freq, no_rounding);
printf(".\n");
}
|
