mirror of
https://gerrit.ovirt.org/vdsm
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7b3cc76962
- Use "MiB" and "GiB" constants instead of magic numbers. Change-Id: I7000a6404ecbfb157c4fea5bf4d7e1411e1cd707 Signed-off-by: Pavel Bar <pbar@redhat.com>
118 lines
4.0 KiB
Python
118 lines
4.0 KiB
Python
#
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# Copyright 2015-2017 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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#
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# Refer to the README and COPYING files for full details of the license
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#
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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import io
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import os
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from subprocess import Popen
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from vdsm import constants
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from vdsm.common import cmdutils
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from vdsm.common.compat import subprocess
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from vdsm.common.time import monotonic_time
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from vdsm.common.units import MiB, GiB
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from testlib import VdsmTestCase
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class TasksetTests(VdsmTestCase):
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CPU_LIST = ['1', '2']
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def test_defaults(self):
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cmd = cmdutils.taskset(['a', 'b'], self.CPU_LIST)
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res = [constants.EXT_TASKSET, '--cpu-list', '1,2', 'a', 'b']
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self.assertEqual(cmd, res)
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class TestRecieveBench(VdsmTestCase):
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COUNT = 1024
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BUFSIZE = MiB
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def test_plain_read(self):
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p = Popen(["dd", "if=/dev/zero", "bs=%d" % self.BUFSIZE,
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"count=%d" % self.COUNT],
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stdin=None,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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start = monotonic_time()
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received = 0
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while True:
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data = os.read(p.stdout.fileno(), self.BUFSIZE)
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if not data:
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break
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received += len(data)
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p.wait()
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elapsed = monotonic_time() - start
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received_gb = received / float(GiB)
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print("%.2fg in %.2f seconds (%.2fg/s)"
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% (received_gb, elapsed, received_gb / elapsed), end=" ")
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self.assertEqual(received, self.COUNT * self.BUFSIZE)
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self.assertEqual(p.returncode, 0)
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def test_read(self):
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p = Popen(["dd", "if=/dev/zero", "bs=%d" % self.BUFSIZE,
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"count=%d" % self.COUNT],
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stdin=None,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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start = monotonic_time()
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received = 0
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for src, data in cmdutils.receive(p, bufsize=self.BUFSIZE):
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if src == cmdutils.OUT:
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received += len(data)
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elapsed = monotonic_time() - start
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received_gb = received / float(GiB)
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print("%.2fg in %.2f seconds (%.2fg/s)"
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% (received_gb, elapsed, received_gb / elapsed), end=" ")
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self.assertEqual(received, self.COUNT * self.BUFSIZE)
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self.assertEqual(p.returncode, 0)
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def test_write(self):
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p = Popen(["dd", "of=/dev/null", "bs=%d" % self.BUFSIZE],
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stdin=subprocess.PIPE,
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stdout=None,
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stderr=subprocess.PIPE)
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start = monotonic_time()
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total = self.COUNT * self.BUFSIZE
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sent = 0
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with io.open("/dev/zero", "rb") as f:
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while sent < total:
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n = min(total - sent, self.BUFSIZE)
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data = f.read(n)
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if not data:
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raise RuntimeError("/dev/zero closed?!")
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p.stdin.write(data)
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sent += len(data)
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p.stdin.flush()
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p.stdin.close()
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for _, data in cmdutils.receive(p, 10):
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pass
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elapsed = monotonic_time() - start
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sent_gb = sent / float(GiB)
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print("%.2fg in %.2f seconds (%.2fg/s)"
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% (sent_gb, elapsed, sent_gb / elapsed), end=" ")
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self.assertEqual(p.returncode, 0)
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