import signal, os from autotest_lib.client.bin import utils, test class bash_shared_mapping(test.test): version = 3 # http://www.zip.com.au/~akpm/linux/patches/stuff/ext3-tools.tar.gz def setup(self, tarball = 'ext3-tools.tar.gz'): self.tarball = utils.unmap_url(self.bindir, tarball, self.tmpdir) utils.extract_tarball_to_dir(self.tarball, self.srcdir) os.chdir(self.srcdir) utils.system('patch -p1 < ../makefile.patch') utils.make('bash-shared-mapping usemem') def initialize(self): self.job.require_gcc() def execute(self, testdir = None, iterations = 10000): if not testdir: testdir = self.tmpdir os.chdir(testdir) file = os.path.join(testdir, 'foo') # Want to use 3/4 of all memory for each of # bash-shared-mapping and usemem kilobytes = (3 * utils.memtotal()) / 4 # Want two usemem -m megabytes in parallel in background. pid = [None, None] usemem = os.path.join(self.srcdir, 'usemem') args = ('usemem', '-N', '-m', '%d' % (kilobytes / 1024)) # print_to_tty ('2 x ' + ' '.join(args)) for i in (0,1): pid[i] = os.spawnv(os.P_NOWAIT, usemem, args) cmd = "%s/bash-shared-mapping %s %d -t %d -n %d" % \ (self.srcdir, file, kilobytes, utils.count_cpus(), iterations) os.system(cmd) for i in (0, 1): os.kill(pid[i], signal.SIGKILL)