add micro benchmark measureing malloc using rdtsc

1 files changed, 75 insertions, 0 deletions

diff --git a/src/benchmarks/rdtsc.py b/src/benchmarks/rdtsc.py
new file mode 100644
index 0000000..b0cd808
--- /dev/null
+++ b/src/benchmarks/rdtsc.py
@@ -0,0 +1,75 @@
+# Copyright 2020 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/>.
+"""Definition of the rdtsc micro benchmark
+
+This benchmark measures the clock cycles used by malloc.
+It tries to spread the spawned thread on all cores exept the first one.
+See: https://developers.redhat.com/blog/2016/03/11/practical-micro-benchmarking-with-ltrace-and-sched/
+"""
+
+import numpy as np
+import matplotlib
+import matplotlib.pyplot as plt
+
+from src.benchmark import Benchmark
+import src.globalvars
+import src.plots
+
+
+class BenchmarkRdtsc(Benchmark):
+    """rdtsc micro benchmark
+
+    This benchmark allocates and frees n blocks in t concurrent threads measuring the used cycles.
+    """
+    def __init__(self):
+        name = "rdtsc"
+
+        self.cmd = "rdtsc {mode} 100000 64 {threads}"
+        self.measure_cmd = ""
+
+        self.args = {"threads": [1],
+                     "mode": ['fresh', 'cached']}
+
+        self.requirements = ["rdtsc"]
+        super().__init__(name)
+
+    def process_output(self, result, stdout, stderr, alloc, perm):
+        all_cycles = []
+        for line in stdout.splitlines():
+            all_cycles.append(int(line.split()[1]))
+        result["cycles"] = all_cycles
+
+    def summary(self):
+        for perm in self.iterate_args(args=self.results['args']):
+            label = f'rdtsc_{perm}_cycles'
+            fig = plt.figure(label)
+            src.plots.FIGURES[label] = fig
+
+            axes = plt.axes()
+            axes.set_ylim([50, 800])
+
+            for alloc in self.results['allocators']:
+                d = np.sort(self.results[alloc][perm][0]['cycles'])
+                plt.plot(d, label=alloc, color=src.plots._get_alloc_color(self, alloc))
+
+            fig.savefig(f'{label}.{src.globalvars.summary_file_ext}')
+            plt.legend()
+            plt.title(str(perm))
+            plt.show()
+
+
+rdtsc = BenchmarkRdtsc()