1 files changed, 78 insertions, 0 deletions
diff --git a/scripts/matplotlib_histograms.py b/scripts/matplotlib_histograms.py
new file mode 100755
index 0000000..4d3af45
--- /dev/null
+++ b/scripts/matplotlib_histograms.py
@@ -0,0 +1,78 @@
+#!/usr/bin/env python3
+
+"""Plot an interactive histogram from malt or chattymalloc output file"""
+
+import argparse
+import importlib
+import inspect
+import json
+import os
+import sys
+
+import matplotlib.pyplot as plt
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Plot histograms using a malt or chattymalloc output file")
+    parser.add_argument("input_file", help="path to malt or chattymalloc output file", type=str)
+    parser.add_argument("-e", "--export", help="export to csv", action="store_true")
+    args = parser.parse_args()
+
+    fname, fext = os.path.splitext(args.input_file)
+    fname = os.path.basename(fname)
+    # chattymalloc
+    if fname.startswith("chatty") and fext == ".txt":
+        # import chattyparser
+        currentdir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))
+        parentdir = os.path.dirname(currentdir)
+        sys.path.insert(0, parentdir)
+
+        chattyparser = importlib.import_module("src.chattyparser")
+
+        hist, _, _ = chattyparser.parse(args.input_file, coll_size=False)
+    # malt
+    else:
+        with open(args.input_file, "r") as json_file:
+            hist = json.load(json_file)["memStats"]["sizeMap"]
+
+    if args.export:
+        with open(f"{fname}.csv", "w") as csv_file:
+            print("Size", "Amount", file=csv_file)
+            for size, amount in hist.items():
+                print(size, amount, file=csv_file)
+
+    else:
+        sizes = []
+        sizes_smaller_4K = []
+        sizes_smaller_32K = []
+        sizes_bigger_32K = []
+        for size, amount in hist.items():
+            size = int(size)
+            sizes.append(size * amount)
+            if size < 4096:
+                sizes_smaller_4K.append(size * amount)
+            if size < 32000:
+                sizes_smaller_32K.append(size * amount)
+            else:
+                sizes_bigger_32K.append(size * amount)
+
+
+        plt.figure(0)
+        plt.hist(sizes_smaller_4K, 200)
+        plt.title("Sizes smaller than 4K")
+
+        plt.figure(1)
+        plt.hist(sizes_smaller_32K, 200)
+        plt.title("Sizes smaller than 32K")
+
+        plt.figure(2)
+        plt.hist(sizes_bigger_32K, 200)
+        plt.title("Sizes bigger than 32K")
+
+        plt.figure(3)
+        plt.hist(sizes, 200)
+        plt.title("All sizes")
+        plt.show()
+
+if __name__ == "__main__":
+    main()