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Disable fastmath with OpenCL on Intel devices
[alexxy/gromacs.git]
/
docs
/
user-guide
/
environment-variables.rst
diff --git
a/docs/user-guide/environment-variables.rst
b/docs/user-guide/environment-variables.rst
index 026654d36988a1309164adcebbd62c3573a7bb68..1698fcedb260d307b15f8c9c182f17e920165895 100644
(file)
--- a/
docs/user-guide/environment-variables.rst
+++ b/
docs/user-guide/environment-variables.rst
@@
-423,6
+423,7
@@
compilation of OpenCL kernels, but they are also used in device selection.
``GMX_OCL_DISABLE_FASTMATH``
Prevents the use of ``-cl-fast-relaxed-math`` compiler option.
``GMX_OCL_DISABLE_FASTMATH``
Prevents the use of ``-cl-fast-relaxed-math`` compiler option.
+ Not: fast math is always disabled on Intel devices due to instability.
``GMX_OCL_DUMP_LOG``
If defined, the OpenCL build log is always written to the
``GMX_OCL_DUMP_LOG``
If defined, the OpenCL build log is always written to the
@@
-442,8
+443,8
@@
compilation of OpenCL kernels, but they are also used in device selection.
``GMX_OCL_NOGENCACHE``).
- NVIDIA GPUs: PTX code is saved in the current directory
``GMX_OCL_NOGENCACHE``).
- NVIDIA GPUs: PTX code is saved in the current directory
- with the name ``device_name.ptx``
- - AMD GPUs: ``.IL/.ISA`` files will be created for each OpenCL
+
with the name ``device_name.ptx``
+
- AMD GPUs: ``.IL/.ISA`` files will be created for each OpenCL
kernel built. For details about where these files are
created check AMD documentation for ``-save-temps`` compiler
option.
kernel built. For details about where these files are
created check AMD documentation for ``-save-temps`` compiler
option.