1 2 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved. 3 # Use of this source code is governed by a BSD-style license that can be 4 # found in the LICENSE file. 5 6 import os, shutil, re 7 from autotest_lib.client.bin import utils, test 8 9 class ddtest(test.test): 10 version = 2 11 12 13 def setup(self, tarball='ddtest.tar.gz'): 14 tarball = utils.unmap_url(self.bindir, tarball, self.tmpdir) 15 utils.extract_tarball_to_dir(tarball, self.srcdir) 16 os.chdir(self.srcdir) 17 utils.system('make build') 18 19 20 def initialize(self): 21 self.job.require_gcc() 22 self.results = [] 23 self.job.drop_caches_between_iterations = True 24 25 26 def run_once(self, dir=None, blocksize=1024, blocknum=262144, threads=20): 27 if not dir: 28 dir = os.path.join(self.srcdir, 'rdir') 29 shutil.rmtree(dir, True) 30 os.mkdir(dir) 31 args = '-D ' + dir 32 args += ' -b %d' % blocksize 33 args += ' -n %d' % blocknum 34 args += ' -t %d' % threads 35 self.results.append(utils.system_output(os.path.join(self.srcdir, 36 'ddtest') + ' ' + args)) 37 38 39 def postprocess(self): 40 pattern = re.compile(r"throughput is (.*?) MB/sec") 41 for throughput in pattern.findall("\n".join(self.results)): 42 self.write_perf_keyval({'throughput':throughput}) 43
