From 8174a918ea3b7cb216bf7ea98cfdc10661b5c37d Mon Sep 17 00:00:00 2001
From: Florian Fischer <florian.fl.fischer@fau.de>
Date: Wed, 6 May 2020 16:56:32 +0200
Subject: make the whole project more python idiomatic

* rename src directory to allocbench
* make global variable names UPPERCASE
* format a lot of code using yapf
* use lowercase ld_preload and ld_library_path as Allocator members
* name expected Errors 'err' and don't raise a new Exception
* disable some pylint messages
---
 src/benchmarks/larson.py | 101 -----------------------------------------------
 1 file changed, 101 deletions(-)
 delete mode 100644 src/benchmarks/larson.py

(limited to 'src/benchmarks/larson.py')

diff --git a/src/benchmarks/larson.py b/src/benchmarks/larson.py
deleted file mode 100644
index db38789..0000000
--- a/src/benchmarks/larson.py
+++ /dev/null
@@ -1,101 +0,0 @@
-# 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/>.
-"""Larson server benchmark
-
-This benchmark was build by Paul Larson at Microsoft Research. It
-simulates a server: each thread has a set of allocations. From which it selects
-a random slot. The allocation in this slot is freed, a new one with a random size
-allocated, written to and stored in the selected slot. When a thread finished its
-allocations it will pass its objects to a new thread.
-
-Larson benchmark usage: ./larson sleep min-size max-size chunks malloc_frees seed threads
-
-In the paper "Memory Allocation for Long-Running Server Applications" the authors
-use 1000 chunks per thread and 50000 malloc and free pairs per thread which
-correspond to a "bleeding rate" of 2% which they observed in real world systems.
-The allocations are uniformly distributed between min-size and max-size.
-
-allocbench runs larson with different distributions and thread counts.
-The other arguments are the same as the original authors used in their paper.
-
-mimalloc-bench uses 1000 chunks per thread and 10000 malloc and free pairs
-simulating 10% bleeding. I don't know why they use different values than the
-original paper.
-
-
-Interpretation:
-
-This benchmark is intended to model a real world server workload.
-But the use of a uniformly distribution of allocation sizes clearly differs from
-real applications. Although the results can be a metric of scalability and
-false sharing because it uses multiple threads, which pass memory around.
-"""
-
-import re
-
-from src.benchmark import Benchmark
-import src.plots as plt
-
-THROUGHPUT_RE = re.compile(
-    "^Throughput =\\s*(?P<throughput>\\d+) operations per second.$")
-
-
-class BenchmarkLarson(Benchmark):
-    """Definition of the larson benchmark"""
-    def __init__(self):
-        name = "larson"
-
-        # Parameters taken from the paper "Memory Allocation for Long-Running Server
-        # Applications" from Larson and Krishnan
-        self.cmd = "larson{binary_suffix} 5 8 {maxsize} 1000 50000 1 {threads}"
-
-        self.args = {
-            "maxsize": [64, 512, 1024],
-            "threads": Benchmark.scale_threads_for_cpus(2)
-        }
-
-        self.requirements = ["larson"]
-        super().__init__(name)
-
-    @staticmethod
-    def process_output(result, stdout, stderr, target, perm):
-        for line in stdout.splitlines():
-            res = THROUGHPUT_RE.match(line)
-            if res:
-                result["throughput"] = int(res.group("throughput"))
-                return
-
-    def summary(self):
-        # Plot threads->throughput and maxsize->throughput
-        plt.plot(self,
-                 "{throughput}/1000000",
-                 fig_options={
-                     'ylabel': "MOPS/s",
-                     'title': "Larson: {arg} {arg_value}",
-                 },
-                 file_postfix="throughput")
-
-        plt.plot(self,
-                 "({L1-dcache-load-misses}/{L1-dcache-loads})*100",
-                 fig_options={
-                     'ylabel': "l1 cache misses in %",
-                     'title': "Larson cache misses: {arg} {arg_value}",
-                 },
-                 file_postfix="cachemisses")
-
-
-larson = BenchmarkLarson()
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