1 import signal, os 2 from autotest_lib.client.bin import utils, test 3 4 class bash_shared_mapping(test.test): 5 version = 3 6 7 # http://www.zip.com.au/~akpm/linux/patches/stuff/ext3-tools.tar.gz 8 def setup(self, tarball = 'ext3-tools.tar.gz'): 9 self.tarball = utils.unmap_url(self.bindir, tarball, self.tmpdir) 10 utils.extract_tarball_to_dir(self.tarball, self.srcdir) 11 12 os.chdir(self.srcdir) 13 utils.system('patch -p1 < ../makefile.patch') 14 utils.make('bash-shared-mapping usemem') 15 16 17 def initialize(self): 18 self.job.require_gcc() 19 20 21 def execute(self, testdir = None, iterations = 10000): 22 if not testdir: 23 testdir = self.tmpdir 24 os.chdir(testdir) 25 file = os.path.join(testdir, 'foo') 26 # Want to use 3/4 of all memory for each of 27 # bash-shared-mapping and usemem 28 kilobytes = (3 * utils.memtotal()) / 4 29 30 # Want two usemem -m megabytes in parallel in background. 31 pid = [None, None] 32 usemem = os.path.join(self.srcdir, 'usemem') 33 args = ('usemem', '-N', '-m', '%d' % (kilobytes / 1024)) 34 # print_to_tty ('2 x ' + ' '.join(args)) 35 for i in (0,1): 36 pid[i] = os.spawnv(os.P_NOWAIT, usemem, args) 37 38 cmd = "%s/bash-shared-mapping %s %d -t %d -n %d" % \ 39 (self.srcdir, file, kilobytes, 40 utils.count_cpus(), iterations) 41 os.system(cmd) 42 43 for i in (0, 1): 44 os.kill(pid[i], signal.SIGKILL) 45
