1 files changed, 0 insertions, 36 deletions
diff --git a/examples/futexes.stp b/examples/futexes.stp
deleted file mode 100755
index 16c62937..00000000
--- a/examples/futexes.stp
+++ /dev/null
@@ -1,36 +0,0 @@
-#! /usr/bin/env stap
-
-# This script tries to identify contended user-space locks by hooking
-# into the futex system call.
-
-global thread_thislock # short
-global thread_blocktime # 
-global FUTEX_WAIT = 0 /*, FUTEX_WAKE = 1 */
-
-global lock_waits # long-lived stats on (tid,lock) blockage elapsed time
-global process_names # long-lived pid-to-execname mapping
-
-probe syscall.futex {  
-   if (op != FUTEX_WAIT) next  # we don't care about originators of WAKE events
-   t = tid ()
-   process_names[pid()] = execname()
-   thread_thislock[t] = $uaddr
-   thread_blocktime[t] = gettimeofday_us()
-}
-
-probe syscall.futex.return {  
-   t = tid()
-   ts = thread_blocktime[t]
-   if (ts) {
-     elapsed = gettimeofday_us() - ts
-     lock_waits[pid(), thread_thislock[t]] <<< elapsed
-     delete thread_blocktime[t]
-     delete thread_thislock[t]
-   }
-}
-
-probe end {
-   foreach ([pid+, lock] in lock_waits) 
-     printf ("%s[%d] lock %p contended %d times, %d avg us\n",
-       process_names[pid], pid, lock, @count(lock_waits[pid,lock]), @avg(lock_waits[pid,lock]))
-}