Disabled CUDA timings

[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 4d6d780bf2175668d58df384850e3c153c3b79fc..4cbd001f1e9cf73a2f64147c2eb497d0a37e2585 100644 (file)
--- a/docs/user-guide/environment-variables.rst
+++ b/docs/user-guide/environment-variables.rst
@@ -78,6 +78,15 @@ Output Control
         Defaults to 1, which prints frame count e.g. when reading trajectory
         files. Set to 0 for quiet operation.
 
+``GMX_ENABLE_GPU_TIMING``
+        Enables GPU timings in the log file for CUDA. Note that CUDA timings
+        are incorrect with multiple streams, as happens with domain
+        decomposition or with both non-bondeds and PME on the GPU (this is
+        also the main reason why they are not turned on by default).
+
+``GMX_DISABLE_GPU_TIMING``
+        Disables GPU timings in the log file for OpenCL.
+
 Debugging
 ---------
 ``GMX_PRINT_DEBUG_LINES``
@@ -460,9 +469,6 @@ compilation of OpenCL kernels, but they are also used in device selection.
         Forces the use of twin-range cutoff kernel. Equivalent of
         CUDA environment variable ``GMX_CUDA_NB_EWALD_TWINCUT``
 
-``GMX_DISABLE_OCL_TIMING``
-        Disables timing for OpenCL operations
-
 ``GMX_OCL_FILE_PATH``
         Use this parameter to force |Gromacs| to load the OpenCL
         kernels from a custom location. Use it only if you want to