faq.markdown

@@ -31,3 +31,18 @@ or that you add the path inside your command script with the two lines:
 import sys
 sys.path.append("my_build_path")
 ```
+
+###### How to use multi-threaded version ####
+
+First the code must be re-compiled (unavailable on Windows). Go to your build directory
+(if you followed the instruction of the wiki it should be *lmgc90_user/build*), then type the
+following command in your terminal:
+```shell
+cmake . -DWITH_OPENMP=True
+```
+Finally before running a computation, you must set two environment variables which are:
+```shell
+export OMP_SCHEDULE=STATIC
+export OMP_NUM_THREADS=n
+```
+where **n** is the number of threads you want to use (usually no more than the number of core available).
\ No newline at end of file