1 files changed, 88 insertions, 0 deletions
diff --git a/scripts/histogram.py b/scripts/histogram.py
new file mode 100755
index 0000000..2dd3b6c
--- /dev/null
+++ b/scripts/histogram.py
@@ -0,0 +1,88 @@
+#!/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
+
+currentdir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))
+parentdir = os.path.dirname(currentdir)
+sys.path.insert(0, parentdir)
+
+import src.chattyparser
+
+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")
+    parser.add_argument("-n", "--no-ascii", help="don't output a ascii histogram", action="store_true")
+    parser.add_argument("-i", "--interactive", help="open interactive matplotlib histogram plots",
+                        action="store_true")
+    args = parser.parse_args()
+
+    fpath, fext = os.path.splitext(args.input_file)
+    fname = os.path.basename(fpath)
+    # chattymalloc
+    if fname.startswith("chatty") and fext == ".txt":
+        hist, calls, _ = src.chattyparser.parse(args.input_file, coll_size=False)
+    # malt
+    else:
+        with open(args.input_file, "r") as json_file:
+            malt_res =  json.load(json_file)
+
+        hist = malt_res["memStats"]["sizeMap"]
+        calls = {}
+        for thread in malt_res["threads"]:
+            for func, data in thread["stats"].items():
+                calls[func] = calls.get(func, 0) + data["count"]
+
+    if args.export:
+        with open(f"{fpath}.csv", "w") as csv_file:
+            print("Size", "Amount", file=csv_file)
+            for size, amount in hist.items():
+                print(size, amount, file=csv_file)
+
+    if not args.no_ascii:
+        src.chattyparser.plot_hist_ascii(f"{fpath}.hist.txt", hist, calls)
+
+    if args.interactive:
+        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()