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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('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)
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