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#!/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"""
# build analyzse allocator before globaly setting LD_PRELOAD
build_analyze_alloc()
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)
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