Merge pull request #2724 from therearesomewhocallmetim/consumption-analyzer

Simple parser for Instruments files.

tools/InstrumentsTraceParser.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python2.7
+
+from __future__ import print_function
+import struct
+import sys
+import numpy
+
+
+class Analyzer:
+    """
+    The binary format is
+        time since the beginning of the measurement : double
+        unknown and irrelevant field : double
+        momentary consumption calculated for the current time segment : double
+    """
+    def __init__(self):
+        self.duration = 0.0
+        self.consumption = []
+        self.mean = 0.0
+        self.std = 0.0
+        self.avg = 0.0
+        self.averages = []
+
+
+    def read_file(self, file_path):
+        binary = bytearray()
+        with open(file_path, "r") as f:
+            binary = bytearray(f.read())
+
+        for i in range(0, len(binary) - 24, 24):
+            res = struct.unpack(">ddd", binary[i:i+24])
+
+            current_duration = res[0]
+            if not current_duration > self.duration:
+                print("Unexpected elapsed time value, lower than the previous one.")
+                exit(2) # this should never happen because the file is written sequentially
+
+            current_consumption = res[2]
+            self.averages.append(current_consumption / (current_duration - self.duration))
+            self.duration = current_duration
+
+            self.consumption.append(current_consumption)
+
+        self.calculate_stats()
+
+
+    def calculate_stats(self):
+        self.mean = numpy.mean(self.averages)
+        self.std = numpy.std(self.averages)
+        self.avg = sum(self.consumption) / self.duration
+
+
+if __name__ == "__main__":
+    for file_path in sys.argv[1:]:
+        analyzer = Analyzer()
+        analyzer.read_file(file_path)
+        print("{}\n\tavg:  {}\n\tmean: {}\n\tstd:  {}".format(file_path, analyzer.avg, analyzer.mean, analyzer.std))