1 files changed, 18 insertions, 10 deletions
diff --git a/setup_environment b/setup_environment
index 8bcb9aa..e5cd4fa 100644
--- a/setup_environment
+++ b/setup_environment
@@ -134,18 +134,26 @@ else
 	echo "configured without a power model.";
 fi
 
+export PTXAS_CUDA_INSTALL_PATH=$CUDA_INSTALL_PATH
+echo "";
+echo "----------------------------------------------------------------------------";
+echo "WARNING - If you only care about PTX execution, ignore this warning. GPGPU-Sim supports PTX execution in modern CUDA."
 if [ $CUDA_VERSION_NUMBER -gt 4200 ]; then
-    echo "";
-    echo "----------------------------------------------------------------------------";
-    echo "WARNING - If you only care about PTX execution, ignore this warning. GPGPU-Sim supports PTX execution in modern CUDA."
-    echo "If you want to run PTXPLUS, download SDK 4.2 (in addition to your modern CUDA) and set \$CUDA_42_INSTALL_PATH."
-    echo "The following text describes why:";
-    echo "If you are using PTXPLUS, only sm_1x is supported and it requires that the app binaries are compiled in CUDA 4.2 or less.";
-    echo "New versions of CUDA tools have dropped parsing support for sm_1x - therefore to use PTXPLUS with a modern card configuration, you must";
-    echo "have both CUDA 4.2 and a modern CUDA installed. When running PTXPLUS under a CUDA version >= 4.2, the simulator will fail unless \$CUDA_42_INSTALL_PATH";
-    echo "has been set properly. You must set this manually.";
-    echo "----------------------------------------------------------------------------"
+    echo "If you want to run PTXPLUS (sm_1x SASS) with a modern card configuration, the apps and simulator must be compiled with CUDA 4.2."
+    echo "You can still run a PASCAL configuration when compiling with 4.2 by setting the \$PTXAS_CUDA_INSTALL_PATH directory environment variable."
+else
+    echo "If you want to run PTXPLUS (sm_1x SASS) with a modern card configuration - set the envronment variable"
+    echo "\$PTXAS_CUDA_INSTALL_PATH to point a CUDA version compabible with your card configurations (i.e. 8+ for PASCAL, 9+ for VOLTA etc..)"
+    echo "For example: \"export \$PTXAS_CUDA_INSTALL_PATH=/usr/local/cuda-9.1\""
 fi
+echo "The following text describes why:";
+echo "If you are using PTXPLUS, only sm_1x is supported and it requires that the app and simulator binaries are compiled in CUDA 4.2 or less.";
+echo "The simulator requires it since CUDA headers desribe struct sizes in the exec which change from gen to gen.";
+echo "The apps require 4.2 because new versions of CUDA tools have dropped parsing support for generating sm_1x";
+echo "When running using modern config (i.e. pascal) and PTXPLUS with CUDA 4.2, the \$PTXAS_CUDA_INSTALL_PATH env variable is required to get proper register usage"
+echo "(and hence occupancy) using a version of CUDA that knows the register usage on the real card."
+echo "";
+echo "----------------------------------------------------------------------------";
 
 echo "setup_environment succeeded";