Initial Commit

1 files changed, 29 insertions, 0 deletions

diff --git a/stap_tutorial-1.0/examples/top-cs.stp b/stap_tutorial-1.0/examples/top-cs.stp
new file mode 100755
index 0000000..efe5769
--- /dev/null
+++ b/stap_tutorial-1.0/examples/top-cs.stp
@@ -0,0 +1,29 @@
+#!/usr/bin/env stap 
+#
+# Continuously list the top context switchers  
+#
+
+global processes
+
+probe begin {
+	printf("Collecting data...\n")
+}
+
+function print_top () {
+	printf("Process\t\t\t\tCount\n")
+	printf("--------------------------------------\n")
+	foreach (name in processes- limit 20)
+		printf("%-20s\t\t%5d\n",name, processes[name])
+	printf("--------------------------------------\n\n")
+	delete processes
+}
+
+probe scheduler.cpu_on {
+	processes[execname()]++
+}
+
+# print top context switchers every 10 seconds
+probe timer.s(10) {
+	print_top ()
+}
+