diff options
Diffstat (limited to 'src/falsesharing.py')
| -rw-r--r-- | src/falsesharing.py | 41 |
1 files changed, 21 insertions, 20 deletions
diff --git a/src/falsesharing.py b/src/falsesharing.py index 6c4ddc0..79de436 100644 --- a/src/falsesharing.py +++ b/src/falsesharing.py @@ -1,26 +1,26 @@ import matplotlib.pyplot as plt import multiprocessing import numpy as np -import os import re from src.benchmark import Benchmark time_re = re.compile("^Time elapsed = (?P<time>\d*\.\d*) seconds.$") -class Benchmark_Falsesharing( Benchmark ): + +class Benchmark_Falsesharing(Benchmark): def __init__(self): self.name = "falsesharing" self.descrition = """This benchmarks makes small allocations and writes - to them multiple times. If the allocated objects are - on the same cache line the writes will be expensive because - of cache thrashing.""" + to them multiple times. If the allocated objects + are on the same cache line the writes will be + expensive because of cache thrashing.""" self.cmd = "cache-{bench}{binary_suffix} {threads} 100 8 1000000" self.args = { - "bench" : ["thrash", "scratch"], - "threads" : range(1, multiprocessing.cpu_count() * 2 + 1) + "bench": ["thrash", "scratch"], + "threads": range(1, multiprocessing.cpu_count() * 2 + 1) } self.requirements = ["cache-thrash", "cache-scratch"] @@ -41,34 +41,35 @@ class Benchmark_Falsesharing( Benchmark ): single_threaded_perm = self.Perm(bench=bench, threads=1) single_threaded = np.mean([float(m["time"]) - for m in self.results[target][single_threaded_perm]]) + for m in self.results[target][single_threaded_perm]]) - for perm in self.iterate_args_fixed({"bench" : bench}, args=args): + for perm in self.iterate_args_fixed({"bench": bench}, args=args): d = [float(m["time"]) for m in self.results[target][perm]] y_vals.append(single_threaded / np.mean(d)) - plt.plot(nthreads, y_vals, marker='.', linestyle='-', label=target, - color=targets[target]["color"]) + plt.plot(nthreads, y_vals, marker='.', linestyle='-', + label=target, color=targets[target]["color"]) plt.legend() plt.xlabel("threads") plt.ylabel("speedup") - plt.title(bench + " speedup" ) + plt.title(bench + " speedup") plt.savefig(self.name + "." + bench + ".png") plt.clf() self.plot_fixed_arg("({L1-dcache-load-misses}/{L1-dcache-loads})*100", - ylabel="'l1 cache misses in %'", - title = "'cache misses: ' + arg + ' ' + str(arg_value)", - filepostfix = "l1-misses", - fixed=["bench"]) + ylabel="'l1 cache misses in %'", + title="'cache misses: ' + arg + ' ' + str(arg_value)", + filepostfix="l1-misses", + fixed=["bench"]) self.plot_fixed_arg("({LLC-load-misses}/{LLC-loads})*100", - ylabel="'l1 cache misses in %'", - title = "'LLC misses: ' + arg + ' ' + str(arg_value)", - filepostfix = "llc-misses", - fixed=["bench"]) + ylabel="'l1 cache misses in %'", + title="'LLC misses: ' + arg + ' ' + str(arg_value)", + filepostfix="llc-misses", + fixed=["bench"]) + falsesharing = Benchmark_Falsesharing() |