Merge pull request #464 from Rombur/xnack

Document behavior of page migration when using HIP
kokkos · Oct 25, 2023 · fb729e3 · fb729e3
2 parents 0f618ae + 29113d8
commit fb729e3
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diff --git a/docs/source/known-issues.rst b/docs/source/known-issues.rst
@@ -8,6 +8,13 @@ Known issues
 HIP
 ===
 
+- When using `HIPManagedSpace`, the memory migrates between the CPU and the GPU if:
+   - the hardware supports it
+   - the kernel was compiled to support page migration
+   - the environment variable `HSA_XNACK` is set to 1
+
+   See `here <https://docs.olcf.ornl.gov/systems/frontier_user_guide.html#enabling-gpu-page-migration>`_ for more explanation.
+
 - Compatibility issue between HIP and gcc 8. You may encounter the following error:
 
   .. code-block::