Documentation

Function: unmap_mem

C Prototype

aclError aclrtUnmapMem(void *virPtr)

Python Function

ret = acl.rt.unmap_mem(vir_ptr)

Function Usage

Unmaps virtual memory from physical memory.

This API needs to work with other APIs to allocate virtual memory with consecutive addresses and maximize the use of physical memory.
  1. Call acl.rt.reserve_mem_address to allocate virtual memory.
  2. Call acl.rt.malloc_physical to allocate physical memory.
  3. Call acl.rt.map_mem to map the virtual memory to the physical memory.
  4. Call specific task APIs to execute tasks.
  5. Call acl.rt.unmap_mem to unmap the virtual memory from the physical memory.
  6. Call acl.rt.free_physical to free the physical memory.
  7. Call acl.rt.release_mem_address to free the virtual memory.

Input Description

vir_ptr: int, virtual address to be unmapped.

Return Value

ret: int, error code.

Restrictions

This API is not supported in Ascend RC form.
Parent topic: Memory Management