1 files changed, 27 insertions, 0 deletions
diff --git a/stap_tutorial-1.0/examples/read-write-2.stp b/stap_tutorial-1.0/examples/read-write-2.stp
new file mode 100755
index 0000000..d6a647b
--- /dev/null
+++ b/stap_tutorial-1.0/examples/read-write-2.stp
@@ -0,0 +1,27 @@
+#!/usr/bin/env stap
+
+global reads, writes
+
+probe begin {
+	printf("Collecting data...\n")
+}
+
+probe syscall.read.return {
+	if ($return > 0)
+		reads[execname()] += $return
+}
+
+probe syscall.write.return {
+	if ($return > 0)
+		writes[execname()] += $return
+}
+
+probe end {
+	printf("Bytes read by process name:\n")
+	foreach (name in reads-)
+		printf("%10d %s\n", reads[name], name)
+
+	printf("Bytes written by process name:\n")
+	foreach (name in writes-)
+		printf("%10d %s\n", writes[name], name)
+}