7fe2f6399a
CPU power consumption vs performance tuning is no longer limited to CPU frequency switching anymore: deep sleep states, traditional dynamic frequency scaling and hidden turbo/boost frequencies are tied close together and depend on each other. The first two exist on different architectures like PPC, Itanium and ARM, the latter (so far) only on X86. On X86 the APU (CPU+GPU) will only run most efficiently if CPU and GPU has proper power management in place. Users and Developers want to have *one* tool to get an overview what their system supports and to monitor and debug CPU power management in detail. The tool should compile and work on as many architectures as possible. Once this tool stabilizes a bit, it is intended to replace the Intel-specific tools in tools/power/x86 Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/*
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* (C) 2010,2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
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*
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* Licensed under the terms of the GNU GPL License version 2.
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*
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*/
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#ifndef __CPUIDLE_INFO_HW__
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#define __CPUIDLE_INFO_HW__
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#include <stdarg.h>
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#include <time.h>
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#include "idle_monitor/idle_monitors.h"
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#define MONITORS_MAX 20
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#define MONITOR_NAME_LEN 20
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#define CSTATE_NAME_LEN 5
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#define CSTATE_DESC_LEN 60
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int cpu_count;
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/* Hard to define the right names ...: */
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enum power_range_e {
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RANGE_THREAD, /* Lowest in topology hierarcy, AMD: core, Intel: thread
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kernel sysfs: cpu */
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RANGE_CORE, /* AMD: unit, Intel: core, kernel_sysfs: core_id */
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RANGE_PACKAGE, /* Package, processor socket */
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RANGE_MACHINE, /* Machine, platform wide */
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RANGE_MAX };
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typedef struct cstate {
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int id;
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enum power_range_e range;
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char name[CSTATE_NAME_LEN];
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char desc[CSTATE_DESC_LEN];
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/* either provide a percentage or a general count */
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int (*get_count_percent)(unsigned int self_id, double *percent,
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unsigned int cpu);
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int (*get_count)(unsigned int self_id, unsigned long long *count,
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unsigned int cpu);
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} cstate_t;
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struct cpuidle_monitor {
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/* Name must not contain whitespaces */
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char name[MONITOR_NAME_LEN];
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int name_len;
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int hw_states_num;
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cstate_t *hw_states;
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int (*start) (void);
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int (*stop) (void);
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struct cpuidle_monitor* (*do_register) (void);
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void (*unregister)(void);
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unsigned int overflow_s;
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int needs_root;
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};
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extern long long timespec_diff_us(struct timespec start, struct timespec end);
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#define print_overflow_err(mes, ov) \
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{ \
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fprintf(stderr, gettext("Measure took %u seconds, but registers could " \
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"overflow at %u seconds, results " \
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"could be inaccurate\n"), mes, ov); \
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}
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#endif /* __CPUIDLE_INFO_HW__ */
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