This is a simple helper script to extract TLB flush stats from the a
simpletrace file and plot the results.
Signed-off-by: Alex Bennée <alex.ben...@linaro.org>
---
scripts/analyse-tlb-flushes-simpletrace.py | 62 ++++++++++++++++++++++++++++++
1 file changed, 62 insertions(+)
create mode 100755 scripts/analyse-tlb-flushes-simpletrace.py
diff --git a/scripts/analyse-tlb-flushes-simpletrace.py
b/scripts/analyse-tlb-flushes-simpletrace.py
new file mode 100755
index 0000000000..9a1191c154
--- /dev/null
+++ b/scripts/analyse-tlb-flushes-simpletrace.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Generate a simple graph of flushes over time
+#
+# Author: Alex Bennée <alex.ben...@linaro.org>
+#
+
+import os
+import simpletrace
+import argparse
+import numpy as np
+import matplotlib.pyplot as plt
+
+class CpuTLBFlushAnalyser(simpletrace.Analyzer):
+ "A simpletrace Analyser for extracting flush stats."
+
+ def __init__(self):
+ self.stats = 0
+ self.timestamps = []
+ self.flush_self = []
+ self.flush_async = []
+ self.flush_synced = []
+
+
+ def tlb_flush_stats(self, timestamp, flush_self, flush_async,
flush_synced):
+ "Match for tlb_flush_stats event. Appends counts to the relevant
array."
+ self.timestamps.append(timestamp)
+ self.flush_self.append(flush_self)
+ self.flush_async.append(flush_async)
+ self.flush_synced.append(flush_synced)
+ self.stats += 1
+
+
+def get_args():
+ "Grab options"
+ parser = argparse.ArgumentParser()
+ parser.add_argument("--output", "-o", type=str, help="Render plot to file")
+ parser.add_argument("events", type=str, help='trace file read from')
+ parser.add_argument("tracefile", type=str, help='trace file read from')
+ return parser.parse_args()
+
+if __name__ == '__main__':
+ args = get_args()
+
+ # Gather data from the trace
+ analyzer = CpuTLBFlushAnalyser()
+ simpletrace.process(args.events, args.tracefile, analyzer)
+
+# x = np.arange(analyzer.stats)
+ fself, = plt.plot(analyzer.timestamps, analyzer.flush_self, label="Self")
+ fasync, = plt.plot(analyzer.timestamps, analyzer.flush_async,
label="Async")
+ fsynced, = plt.plot(analyzer.timestamps, analyzer.flush_synced,
label="Synced")
+
+ plt.legend(handles=[fself, fasync, fsynced])
+ plt.xlabel("Execution Time")
+ plt.ylabel("Culmlative count")
+
+ if args.output:
+ plt.savefig(args.output)
+ else:
+ plt.show()
--
2.11.0
