def cmd_collect_metadata(args):
filename = args.output
if filename and os.path.exists(filename):
print("ERROR: The JSON file %r already exists" % filename)
sys.exit(1)
cpus = args.affinity
if cpus:
if not set_cpu_affinity(cpus):
print("ERROR: failed to set the CPU affinity")
sys.exit(1)
else:
cpus = get_isolated_cpus()
if cpus:
set_cpu_affinity(cpus)
# ignore if set_cpu_affinity() failed
run = perf.Run([1.0])
metadata = run.get_metadata()
if metadata:
print("Metadata:")
for line in format_metadata(metadata):
print(line)
if filename:
run = run._update_metadata({'name': 'metadata'})
bench = perf.Benchmark([run])
bench.dump(filename)
def cmd_collect_metadata(args):
filename = args.output
if filename and os.path.exists(filename):
print("ERROR: The JSON file %r already exists" % filename)
sys.exit(1)
cpus = args.affinity
if cpus:
if not set_cpu_affinity(cpus):
print("ERROR: failed to set the CPU affinity")
sys.exit(1)
else:
cpus = get_isolated_cpus()
if cpus:
set_cpu_affinity(cpus)
# ignore if set_cpu_affinity() failed
run = perf.Run([1.0])
metadata = run.get_metadata()
if metadata:
print("Metadata:")
for line in format_metadata(metadata):
print(line)
if filename:
run = run._update_metadata({'name': 'metadata'})
bench = perf.Benchmark([run])
bench.dump(filename)
def _cpu_affinity(self):
cpus = self.args.affinity
if not cpus:
# --affinity option is not set: detect isolated CPUs
isolated = True
cpus = get_isolated_cpus()
if not cpus:
# no isolated CPUs or unable to get the isolated CPUs
return
else:
isolated = False
cpus = parse_cpu_list(cpus)
if set_cpu_affinity(cpus):
if self.args.verbose:
if isolated:
text = ("Pin process to isolated CPUs: %s"
% format_cpu_list(cpus))
else:
text = ("Pin process to CPUs: %s"
% format_cpu_list(cpus))
print(text)
if isolated:
self.args.affinity = format_cpu_list(cpus)
else:
if not isolated:
print("ERROR: CPU affinity not available.", file=sys.stderr)
print("Use Python 3.3 or newer, or install psutil dependency")
sys.exit(1)
elif not self.args.quiet:
print("WARNING: unable to pin worker processes to "
"isolated CPUs, CPU affinity not available")
print("Use Python 3.3 or newer, or install psutil dependency")