implement analysis of specific allocator and benchmark combinations

A allocator implementation is analyzed by prepending chattymalloc.so.

1 files changed, 108 insertions, 0 deletions

diff --git a/src/analyse.py b/src/analyse.py
new file mode 100755
index 0000000..5bbaf3c
--- /dev/null
+++ b/src/analyse.py
@@ -0,0 +1,108 @@
+#!/usr/bin/env python3
+
+# Copyright 2018-2019 Florian Fischer <florian.fl.fischer@fau.de>
+#
+# This file is part of allocbench.
+#
+# allocbench is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# allocbench is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with allocbench.  If not, see <http://www.gnu.org/licenses/>.
+"""Analyze benchmarks and allocators"""
+
+import importlib
+import os
+import traceback
+
+from src.util import find_cmd
+from src.util import print_status, print_warn, print_error
+from src.util import print_info2, print_debug
+
+ANALYZSE_ALLOC_NAME = None
+ANALYZSE_ALLOC_DICT = None
+
+
+def build_analyze_alloc():
+    """Select and build available analysis allocator"""
+    global ANALYZSE_ALLOC_NAME
+    global ANALYZSE_ALLOC_DICT
+    if ANALYZSE_ALLOC_DICT is not None:
+        return
+
+    if find_cmd("malt") is not None:
+        ANALYZSE_ALLOC_NAME = "malt"
+    else:
+        print_warn("malt not found. Using chattymalloc.")
+        ANALYZSE_ALLOC_NAME = "chattymalloc"
+
+    analyze_alloc_module = importlib.import_module(
+        f"src.allocators.{ANALYZSE_ALLOC_NAME}")
+
+    ANALYZSE_ALLOC_DICT = getattr(analyze_alloc_module,
+                                  ANALYZSE_ALLOC_NAME).build()
+
+
+def analyze_bench(bench):
+    """Analyse a single benchmark"""
+    print_status("Analysing {} ...".format(bench))
+
+    # Create benchmark result directory
+    if not os.path.isdir(bench.result_dir):
+        print_info2("Creating benchmark result dir:", bench.result_dir)
+        os.makedirs(bench.result_dir, exist_ok=True)
+
+    build_analyze_alloc()
+
+    old_allocs = bench.allocators
+    old_measure_cmd = bench.measure_cmd
+    bench.measure_cmd = ""
+    bench.allocators = {ANALYZSE_ALLOC_NAME: ANALYZSE_ALLOC_DICT}
+
+    try:
+        bench.run(runs=1)
+    except Exception:
+        print_debug(traceback.format_exc())
+        print_error("Skipping analysis of", bench, "!")
+
+    bench.measure_cmd = old_measure_cmd
+
+    # Remove results for analyze_alloc
+    if ANALYZSE_ALLOC_NAME in bench.results:
+        del bench.results[ANALYZSE_ALLOC_NAME]
+    if "stats" in bench.results and ANALYZSE_ALLOC_NAME in bench.results[
+            "stats"]:
+        del bench.results["stats"][ANALYZSE_ALLOC_NAME]
+
+    # restore allocs
+    bench.allocators = old_allocs
+
+
+def analyze_allocators(bench, allocators):
+    """Analyse a single benchmark for each allocator in allocators"""
+    for name, alloc in allocators.items():
+        print_status(f"Analysing {name} during {bench} ...")
+        os.environ["LD_PRELOAD"] = alloc["LD_PRELOAD"]
+        analyze_bench(bench)
+
+        # save the resulting trace
+        for perm in bench.iterate_args():
+            if bench.servers == []:
+                if perm:
+                    perm_fmt = ("{}-" * (len(perm) - 1) + "{}").format(*perm)
+                else:
+                    perm_fmt = ""
+            else:
+                perm_fmt = ANALYZSE_ALLOC_NAME
+
+            old_trace = os.path.join(bench.result_dir, f"{perm_fmt}.trace")
+            new_trace = os.path.join(bench.result_dir,
+                                     f"{name}_{perm_fmt}.trace")
+            os.rename(old_trace, new_trace)