In case anyone else is interested, here are two quick pointers on
running pybench tests under the profiler.
1. To build Python with profiling hooks (Unix only):
LDFLAGS="-pg" OPT="-pg" configure
make
When you run python it produces a gmon.out file. To run gprof, pass
it the profile-enable executable and gmon.out. It's spit out the
results on stdout.
2. Use this handy script (below) to run a single pybench test under
the profiler and produce the output.
Jeremy
"""Tool to automate profiling of individual pybench benchmarks"""
import os
import re
import tempfile
PYCVS = "/home/jeremy/src/python/dist/src/build-pg/python"
PY152 = "/home/jeremy/src/python/dist/Python-1.5.2/build-pg/python"
rx_grep = re.compile('^([^:]+):(.*)')
rx_decl = re.compile('class (\w+)\(\w+\):')
def find_bench(name):
p = os.popen("grep %s *.py" % name)
for line in p.readlines():
mo = rx_grep.search(line)
if mo is None:
continue
file, text = mo.group(1, 2)
mo = rx_decl.search(text)
if mo is None:
continue
klass = mo.group(1)
return file, klass
return None, None
def write_profile_code(file, klass, path):
i = file.find(".")
file = file[:i]
f = open(path, 'w')
print >> f, "import %s" % file
print >> f, "%s.%s().run()" % (file, klass)
f.close()
def profile(interp, path, result):
if os.path.exists("gmon.out"):
os.unlink("gmon.out")
os.system("PYTHONPATH=. %s %s" % (interp, path))
if not os.path.exists("gmon.out"):
raise RuntimeError, "gmon.out not generated by %s" % interp
os.system("gprof %s gmon.out > %s" % (interp, result))
def main(bench_name):
file, klass = find_bench(bench_name)
if file is None:
raise ValueError, "could not find class %s" % bench_name
code_path = tempfile.mktemp()
write_profile_code(file, klass, code_path)
profile(PYCVS, code_path, "%s.cvs.prof" % bench_name)
profile(PY152, code_path, "%s.152.prof" % bench_name)
os.unlink(code_path)
if __name__ == "__main__":
import sys
main(sys.argv[1])
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