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Date:   Thu, 17 Jan 2019 15:15:33 +0530
From:   Seeteena Thoufeek <>
Subject: [PATCH v2] perf scripts python: Add Python 3 support to

Support both Python 2 and Python 3 in
``print`` is now a function rather than a statement. This should
have no functional change.

The "has_key()" method is deprecated in favor of the "in" operator.
So incorporate those changes here.

Signed-off-by: Seeteena Thoufeek <>
Reviewed-by: Ravi Bangoria <>

Please enter the commit message for your changes. Lines starting
 tools/perf/scripts/python/ | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/tools/perf/scripts/python/ b/tools/perf/scripts/python/
index 0f5cf43..794a9f0 100644
--- a/tools/perf/scripts/python/
+++ b/tools/perf/scripts/python/
@@ -9,6 +9,7 @@
 # to perf python scripting.
 # Measures futex contention
+from __future__ import print_function
 import os, sys
 sys.path.append(os.environ['PERF_EXEC_PATH'] + '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
@@ -33,18 +34,18 @@ def syscalls__sys_enter_futex(event, ctxt, cpu, s, ns, tid, comm, callchain,
 def syscalls__sys_exit_futex(event, ctxt, cpu, s, ns, tid, comm, callchain,
 			     nr, ret):
-	if thread_blocktime.has_key(tid):
+	if (tid in thread_blocktime):
 		elapsed = nsecs(s, ns) - thread_blocktime[tid]
 		add_stats(lock_waits, (tid, thread_thislock[tid]), elapsed)
 		del thread_blocktime[tid]
 		del thread_thislock[tid]
 def trace_begin():
-	print "Press control+C to stop and show the summary"
+	print("Press control+C to stop and show the summary")
 def trace_end():
 	for (tid, lock) in lock_waits:
 		min, max, avg, count = lock_waits[tid, lock]
-		print "%s[%d] lock %x contended %d times, %d avg ns" % \
-		      (process_names[tid], tid, lock, count, avg)
+		print("%s[%d] lock %x contended %d times, %d avg ns" % \
+		      (process_names[tid], tid, lock, count, avg))

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