2 files changed, 37 insertions, 0 deletions
diff --git a/testsuite/systemtap.examples/profiling/topsys.meta b/testsuite/systemtap.examples/profiling/topsys.meta
new file mode 100644
index 00000000..3642713d
--- /dev/null
+++ b/testsuite/systemtap.examples/profiling/topsys.meta
@@ -0,0 +1,13 @@
+title: Show Processes Doing Polling Operations
+name: topsys.stp
+version: 1.0
+author: anonymous
+keywords: profiling
+subsystem: kernel syscalls
+status: production
+exit: user-controlled
+output: sorted-list
+scope: system-wide
+description:  The topsys.stp script lists out the top twenty systemcalls for the previous 5 seconds. The output is sorted from most frequent to least frequent.
+test_check: stap -p4 topsys.stp
+test_installcheck: stap topsys.stp -c "sleep 1"
diff --git a/testsuite/systemtap.examples/profiling/topsys.stp b/testsuite/systemtap.examples/profiling/topsys.stp
new file mode 100644
index 00000000..34cf826c
--- /dev/null
+++ b/testsuite/systemtap.examples/profiling/topsys.stp
@@ -0,0 +1,24 @@
+#! /usr/bin/env stap
+#
+# This script continuously lists the top 20 systemcalls in the interval 
+# 5 seconds
+#
+
+global syscalls_count
+
+probe syscall.* {
+  syscalls_count[name]++
+}
+
+function print_systop () {
+  printf ("%25s %10s\n", "SYSCALL", "COUNT")
+  foreach (syscall in syscalls_count- limit 20) {
+    printf("%25s %10d\n", syscall, syscalls_count[syscall])
+  }
+  delete syscalls_count
+}
+
+probe timer.s(5) {
+  print_systop ()
+  printf("--------------------------------------------------------------\n")
+}