libretro.drivers.perf.default¶

PerfDriver implementation backed by time for timestamps.

See also

PerfDriver: The protocol this driver implements.

Classes

DefaultPerfDriver

The default PerfDriver used when a Session is given no other.

class DefaultPerfDriver[source]¶

Bases: PerfDriver

The default PerfDriver used when a Session is given no other.

Backed by the standard time module (time.time_ns() for wall-clock and time.process_time_ns() for the perf counter).

See also

PerfDriver: The protocol this class implements.

__init__()[source]¶: Initialize the driver with an empty performance-counter registry.

__del__()[source]¶: Drop references to the registered counters before this driver is collected.

property perf_counters¶: A live mapping of registered performance-counter identifiers to their structs.

get_time_usec()[source]¶

Return the current wall-clock time in microseconds.

See also

retro_perf_get_time_usec_t: The C function pointer type whose signature this method implements.

Return type:: int

get_perf_counter()[source]¶

Return the current value of the high-resolution performance counter.

Units are driver-defined but consistent within a single process.

See also

retro_perf_get_counter_t: The C function pointer type whose signature this method implements.

Return type:: int

get_cpu_features()[source]¶

Return a bitmask of CPU features available to the core.

See also

CpuFeatures: Bit flags describing each supported CPU feature.

Return type:: CpuFeatures

perf_register(counter)[source]¶

Parameters:: counter (retro_perf_counter) – The counter struct to register.

See also

retro_perf_register_t: The C function pointer type whose signature this method implements.

Return type:: None

perf_start(counter)[source]¶

Start measuring a previously registered performance counter.

Parameters:: counter (retro_perf_counter) – The counter to start.

See also

retro_perf_start_t: The C function pointer type whose signature this method implements.

Return type:: None

perf_stop(counter)[source]¶

Stop measuring a previously started performance counter.

Parameters:: counter (retro_perf_counter) – The counter to stop.

See also

retro_perf_stop_t: The C function pointer type whose signature this method implements.

Return type:: None

perf_log()[source]¶

Emit accumulated performance-counter measurements to the driver’s log sink.

See also

retro_perf_log_t: The C function pointer type whose signature this method implements.

Return type:: None

classmethod __new__(*args, **kwargs)¶