telemetry.h File Reference

Hardware telemetry metrics, CPU cycle accounting, and Memory Window telemetry slots. More...

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Data Structures
struct	system_tick_info
	Per-core system tick and cycle execution metrics. More...
struct	telemetry_wnd_data
	Layout of telemetry data published in shared Memory Window. More...
struct	telemetry_perf_queue
	Circular queue tracking execution cycle history for rolling averages. More...

Macros
#define	SOF_AVG_PERF_MEAS_DEPTH   64
	Number of historic entries in circular performance measurement queue.
#define	SOF_AVG_PERF_MEAS_PERIOD   16
	Measurement period in runs over which rolling average is computed.
#define	telemetry_timestamp   sof_cycle_get_64
	Timestamp counter accessor using hardware cycle counter.

Functions
void	telemetry_update (uint32_t begin_ccount, uint32_t current_ccount)
	Update periodic telemetry metrics with elapsed core clock cycles.
struct system_tick_info *	telemetry_get_systick_info_ptr (void)
	Retrieve pointer to system tick telemetry structure for current core.

Detailed Description

Hardware telemetry metrics, CPU cycle accounting, and Memory Window telemetry slots.

Macro Definition Documentation

SOF_AVG_PERF_MEAS_DEPTH

#define SOF_AVG_PERF_MEAS_DEPTH   64

Number of historic entries in circular performance measurement queue.

SOF_AVG_PERF_MEAS_PERIOD

#define SOF_AVG_PERF_MEAS_PERIOD   16

Measurement period in runs over which rolling average is computed.

telemetry_timestamp

#define telemetry_timestamp   sof_cycle_get_64

Timestamp counter accessor using hardware cycle counter.