LXR linux/tools/power/cpupower/utils/idle

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 *  (C) 2010,2011       Thomas Renninger <trenn@suse.de>, Novell Inc.
   4 */
   5
   6#ifndef __CPUIDLE_INFO_HW__
   7#define __CPUIDLE_INFO_HW__
   8
   9#include <stdarg.h>
  10#include <time.h>
  11
  12#include "idle_monitor/idle_monitors.h"
  13
  14#define MONITORS_MAX 20
  15#define MONITOR_NAME_LEN 20
  16
  17/* CSTATE_NAME_LEN is limited by header field width defined
  18 * in cpupower-monitor.c. Header field width is defined to be
  19 * sum of percent width and two spaces for padding.
  20 */
  21#ifdef __powerpc__
  22#define CSTATE_NAME_LEN 7
  23#else
  24#define CSTATE_NAME_LEN 5
  25#endif
  26#define CSTATE_DESC_LEN 60
  27
  28extern int cpu_count;
  29
  30/* Hard to define the right names ...: */
  31enum power_range_e {
  32        RANGE_THREAD,   /* Lowest in topology hierarcy, AMD: core, Intel: thread
  33                           kernel sysfs: cpu */
  34        RANGE_CORE,     /* AMD: unit, Intel: core, kernel_sysfs: core_id */
  35        RANGE_PACKAGE,  /* Package, processor socket */
  36        RANGE_MACHINE,  /* Machine, platform wide */
  37        RANGE_MAX };
  38
  39typedef struct cstate {
  40        int  id;
  41        enum power_range_e range;
  42        char name[CSTATE_NAME_LEN];
  43        char desc[CSTATE_DESC_LEN];
  44
  45        /* either provide a percentage or a general count */
  46        int (*get_count_percent)(unsigned int self_id, double *percent,
  47                                 unsigned int cpu);
  48        int (*get_count)(unsigned int self_id, unsigned long long *count,
  49                         unsigned int cpu);
  50} cstate_t;
  51
  52struct cpuidle_monitor {
  53        /* Name must not contain whitespaces */
  54        char name[MONITOR_NAME_LEN];
  55        int name_len;
  56        int hw_states_num;
  57        cstate_t *hw_states;
  58        int (*start) (void);
  59        int (*stop) (void);
  60        struct cpuidle_monitor* (*do_register) (void);
  61        void (*unregister)(void);
  62        unsigned int overflow_s;
  63        struct {
  64                unsigned int needs_root:1;
  65                unsigned int per_cpu_schedule:1;
  66        } flags;
  67};
  68
  69extern long long timespec_diff_us(struct timespec start, struct timespec end);
  70
  71#define print_overflow_err(mes, ov)                                             \
  72{                                                                               \
  73        fprintf(stderr, gettext("Measure took %u seconds, but registers could " \
  74                                "overflow at %u seconds, results "              \
  75                                "could be inaccurate\n"), mes, ov);             \
  76}
  77
  78
  79/* Taken over from x86info project sources  -> return 0 on success */
  80#include <sched.h>
  81#include <sys/types.h>
  82#include <unistd.h>
  83static inline int bind_cpu(int cpu)
  84{
  85        cpu_set_t set;
  86
  87        if (sched_getaffinity(getpid(), sizeof(set), &set) == 0) {
  88                CPU_ZERO(&set);
  89                CPU_SET(cpu, &set);
  90                return sched_setaffinity(getpid(), sizeof(set), &set);
  91        }
  92        return 1;
  93}
  94
  95#endif /* __CPUIDLE_INFO_HW__ */
  96