System libraries

This page lists all the system-level APIs provided in the Hexagon base SDK and where you can find more information about them.

Usage for all system-level APIs is illustrated in the HAP example except for the ION memory allocator, which is illustrated in the calculator example.

Application-side APIs

APIs	Summary
ION memory allocator	Allocate ION memory to be shared between CPU and DSP
Remote APIs	Query and manage DSP capabilities
itrace library	Monitor DSP and CPU events using APIs available from the CPU

DSP-side APIs

The Hexagon SDK includes a number of APIs referred as Hexagon Access Program (HAP) APIs, which provide access to Hexagon capabilities. These APIs in the table below.

APIs	Summary
Performance and power manager	Manage performance and power modes of the DSP
L2 cache manager	Lock & unlock L2 cache
VTCM manager	Allocate VTCM
Compute resource manager	Allocate compute resources
PMU manager	Track hardware events
Performance timers	Measure processing time
Heap and mapping manager	Manage the user PD heap memory and control buffer mapping into this memory
DSP worker pool	General purpose, efficient thread worker pool to assist in multithreading compute workloads. Available under $HEXAGON_SDK_ROOT/libs/worker_pool
itrace library	Monitor DSP events (PMU counters and others) using APIs available from the DSP