diff --git a/README.adoc b/README.adoc
index f3b1a38..329ca2e 100644
--- a/README.adoc
+++ b/README.adoc
@@ -3394,7 +3394,7 @@ https://stackoverflow.com/questions/49516399/how-to-use-m5-readfile-and-m5-execf
 Host:
 
 ....
-date >readfile.gitignore
+date > readfile.gitignore
 ....
 
 Guest:
@@ -3403,6 +3403,23 @@ Guest:
 m5 readfile
 ....
 
+==== m5 execfile
+
+Host:
+
+....
+printf '#!/bin/sh
+echo asdf' > readfile.gitignore
+....
+
+Guest:
+
+....
+touch /tmp/execfile
+chmoe +x /tmp/execfile
+m5 execfile
+....
+
 === gem5 limitations
 
 * networking not working. We currently just disable it from `inittab` by default to prevent waiting at startup
diff --git a/parsec-benchmark/parsec-benchmark b/parsec-benchmark/parsec-benchmark
index d5fa6dc..580f134 160000
--- a/parsec-benchmark/parsec-benchmark
+++ b/parsec-benchmark/parsec-benchmark
@@ -1 +1 @@
-Subproject commit d5fa6dc768e59f26330add3cbeb458ce61ce4d6e
+Subproject commit 580f134dc6d753531bf676b07c574d6b28b70e1d