Merge commit 'origin/master' into pr6429-comp-unwindsyms

* commit 'origin/master':
  Fix assignment optimization expected results.
  PR6538: more testsuite tweaks for read-only warnings
  PR6538: more tapset fixes
  PR6538: explain why absentstats.stp logs will contain warnings
  PR6538: fix treatment of initialized globals
  Use pointer_arg to fetch arguments for syscall.utime and compat_utime.
  Optimize compound and binary expression assignments.
  Check new (sub) functions of _struct_utimbuf_* and _struct_compat_utimbuf_*.
  PR6538: tapset changes
  PR6538: testsuite changes
  PR5001: fix test suite collateral damage
  PR6538: warn about read-only variables
  Add some scripts and descriptions to the systemtap.examples.
  PR5001: Remove _stp_ctime and always use ctime.
  Use tr1/unordered_map instead of the deprecated ext/hash_map.
  PR6524: ctime() on bad values hangs system.
  Optimize away assignments in other contexts.
  Optimize away assignments in other contexts.
  dummy commit for testing systemtap-cvs notification
  Remove sa_restorer initialization.

1 files changed, 25 insertions, 0 deletions

diff --git a/testsuite/systemtap.examples/iotop.stp b/testsuite/systemtap.examples/iotop.stp
new file mode 100644
index 00000000..6050343c
--- /dev/null
+++ b/testsuite/systemtap.examples/iotop.stp
@@ -0,0 +1,25 @@
+global reads, writes, total_io
+
+probe kernel.function("vfs_read") {
+    reads[execname()] += $count
+}
+
+probe kernel.function("vfs_write") {
+    writes[execname()] += $count
+}
+
+# print top 10 IO processes every 5 seconds
+probe timer.s(5) {
+    foreach (name in writes)
+        total_io[name] += writes[name]
+    foreach (name in reads)
+        total_io[name] += reads[name]
+    printf ("%16s\t%10s\t%10s\n", "Process", "KB Read", "KB Written")
+    foreach (name in total_io- limit 10)
+        printf("%16s\t%10d\t%10d\n", name,
+               reads[name]/1024, writes[name]/1024)
+    delete reads
+    delete writes
+    delete total_io
+    print("\n")
+}