Chris Freehill
c48b858093
Sync with the latest changes from upstream repo Change-Id: I309880f5c7f77c58a8b186db320bbc0f0e634089
35 行
1.1 KiB
ReStructuredText
35 行
1.1 KiB
ReStructuredText
.. meta::
|
|
:description: HSA runtime implementation
|
|
:keywords: ROCR, ROCm, library, tool, runtime
|
|
|
|
.. _environment-variables:
|
|
|
|
Environment variables
|
|
========================
|
|
|
|
The following table lists the most often used environment variables.
|
|
|
|
.. list-table:: ROCR environment variables
|
|
:header-rows: 1
|
|
|
|
* - Environment variable
|
|
- Possible values
|
|
- Description
|
|
|
|
* - HSA_ENABLE_SDMA
|
|
-
|
|
* 0: Disabled
|
|
* 1: Enabled (default)
|
|
- This controls the use of DMA engines in all copy directions (Host-to-Device, Device-to-Host, Device-to-Device) when using the
|
|
``hsa_memory_copy``, ``hsa_amd_memory_fill``, ``hsa_amd_memory_async_copy``, ``hsa_amd_memory_async_copy_on_engine`` APIs
|
|
|
|
* - HSA_ENABLE_PEER_SDMA
|
|
-
|
|
* 0: Disabled
|
|
* 1: Enabled (default)
|
|
- This controls the use of DMA engines for Device-to-Device copies when using the ``hsa_memory_copy``, ``hsa_amd_memory_async_copy``, ``hsa_amd_memory_async_copy_on_engine`` APIs
|
|
|
|
.. note::
|
|
|
|
The value of ``HSA_ENABLE_PEER_SDMA`` is ignored if ``HSA_ENABLE_SDMA`` is used to disable the use of DMA engines.
|