Energy API

[beltex]

• As seen in Activity Monitor
• Seems to be a custom calculation, no API for it
• Maybe something in IOPMLib

[beltex]

Goodies via class-dump on Activity Monitor:

    NSNumberFormatter *_powerScoreFormatter;
    NSNumber *_combinedPowerScore;
    NSNumber *_combinedAveragePowerScore;
    NSNumber *_averagePowerScore;
    NSNumber *_powerScore;
    NSNumber *_totalPowerScore;
    NSString *_combinedPowerScoreDescription;
    NSString *_combinedAveragePowerScoreDescription;
    NSString *_powerScoreDescription;
    NSString *_averagePowerScoreDescription;
@property(retain) NSString *averagePowerScoreDescription; // @synthesize averagePowerScoreDescription=_averagePowerScoreDescription;
@property(retain) NSString *powerScoreDescription; // @synthesize powerScoreDescription=_powerScoreDescription;
@property(retain) NSString *combinedAveragePowerScoreDescription; // @synthesize combinedAveragePowerScoreDescription=_combinedAveragePowerScoreDescription;
@property(retain) NSString *combinedPowerScoreDescription; // @synthesize combinedPowerScoreDescription=_combinedPowerScoreDescription;
@property(retain) NSNumber *totalPowerScore; // @synthesize totalPowerScore=_totalPowerScore;
@property(retain) NSNumber *powerScore; // @synthesize powerScore=_powerScore;
@property(retain) NSNumber *averagePowerScore; // @synthesize averagePowerScore=_averagePowerScore;
@property(retain) NSNumber *combinedAveragePowerScore; // @dynamic combinedAveragePowerScore;
@property(retain) NSNumber *combinedPowerScore; // @dynamic combinedPowerScore;
- (id)initWithName:(id)arg1 powerScore:(id)arg2 icon:(id)arg3 bundeIdentifier:(id)arg4;

Next - try DTrace & LLDB/GDB.

[beltex]

Looks like top (which is open source) actually has this stat already, didn't notice it. :)

[beltex]

Also, pre-req for this is #10.

[beltex]

These don't seem to be used by top. Will try them out. In <mach/task_info.h>

#define TASK_POWER_INFO_V2  26

typedef struct {
    uint64_t        task_gpu_utilisation;
    uint64_t        task_gpu_stat_reserved0;
    uint64_t        task_gpu_stat_reserved1;
    uint64_t        task_gpu_stat_reserved2;
} gpu_energy_data;

typedef gpu_energy_data *gpu_energy_data_t;
struct task_power_info_v2 {
    task_power_info_data_t  cpu_energy;
    gpu_energy_data gpu_energy;
};

typedef struct task_power_info_v2   task_power_info_v2_data_t;
typedef struct task_power_info_v2   *task_power_info_v2_t;
#define TASK_POWER_INFO_V2_COUNT    ((mach_msg_type_number_t) \
        (sizeof (task_power_info_v2_data_t) / sizeof (natural_t)))

[beltex]

TASK_POWER_INFO_V2 didn't return any GPU data. Probably because my machine is old, newer graphics card needed, likely a discrete one - MacBook Pro 15+ & Mac Pro.