diff --git a/docs/runtime_variables.md b/docs/runtime_variables.md index 3e83110bb6..a43b98cac5 100644 --- a/docs/runtime_variables.md +++ b/docs/runtime_variables.md @@ -2,18 +2,20 @@ OpenBLAS checks the following environment variables on startup: -* **OPENBLAS_NUM_THREADS=** the number of threads to use (for non OpenMP-builds of OpenBLAS) +* **OPENBLAS_NUM_THREADS=** the number of threads to use (for non-OpenMP-builds of OpenBLAS) * **OMP_NUM_THREADS=** the number of threads to use (for OpenMP builds - note that setting this may also affect any other OpenMP code) * **OPENBLAS_DEFAULT_NUM_THREADS=** the number of threads to use, irrespective if OpenBLAS was built for OpenMP or pthreads * **OPENBLAS_MAIN_FREE=1**" this can be used to disable automatic assignment of cpu affinity in OpenBLAS builds that have it enabled by default * **OPENBLAS_THREAD_TIMEOUT=** this can be used to define the length of time that idle threads should wait before exiting * **OMP_ADAPTIVE=1** this can be used in OpenMP builds to actually remove any surplus threads when the number of threads is decreased -* + + DYNAMIC_ARCH builds also accept the following: * **OPENBLAS_VERBOSE=** set this to "1" to enable a warning when there is no exact match for the detected cpu in the library -* set this to "2" to make OpenBLAS print the name of the cpu target it autodetected + set this to "2" to make OpenBLAS print the name of the cpu target it autodetected * **OPENBLAS_CORETYPE=** set this to one of the supported target names to override autodetection, e.g. OPENBLAS_CORETYPE=HASWELL +* **OPENBLAS_L2_SIZE=** set this to override the autodetected size of the L2 cache where it is not reported correctly (in virtual environments)