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Diffstat (limited to 'qemu/tests/qemu-iotests/093')
| -rwxr-xr-x | qemu/tests/qemu-iotests/093 | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/qemu/tests/qemu-iotests/093 b/qemu/tests/qemu-iotests/093 deleted file mode 100755 index ce8e13cb4..000000000 --- a/qemu/tests/qemu-iotests/093 +++ /dev/null @@ -1,188 +0,0 @@ -#!/usr/bin/env python -# -# Tests for IO throttling -# -# Copyright (C) 2015 Red Hat, Inc. -# Copyright (C) 2015-2016 Igalia, S.L. -# -# This program is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program. If not, see <http://www.gnu.org/licenses/>. -# - -import iotests - -nsec_per_sec = 1000000000 - -class ThrottleTestCase(iotests.QMPTestCase): - test_img = "null-aio://" - max_drives = 3 - - def blockstats(self, device): - result = self.vm.qmp("query-blockstats") - for r in result['return']: - if r['device'] == device: - stat = r['stats'] - return stat['rd_bytes'], stat['rd_operations'], stat['wr_bytes'], stat['wr_operations'] - raise Exception("Device not found for blockstats: %s" % device) - - def setUp(self): - self.vm = iotests.VM() - for i in range(0, self.max_drives): - self.vm.add_drive(self.test_img) - self.vm.launch() - - def tearDown(self): - self.vm.shutdown() - - def configure_throttle(self, ndrives, params): - params['group'] = 'test' - - # Set the I/O throttling parameters to all drives - for i in range(0, ndrives): - params['device'] = 'drive%d' % i - result = self.vm.qmp("block_set_io_throttle", conv_keys=False, **params) - self.assert_qmp(result, 'return', {}) - - def do_test_throttle(self, ndrives, seconds, params): - def check_limit(limit, num): - # IO throttling algorithm is discrete, allow 10% error so the test - # is more robust - return limit == 0 or \ - (num < seconds * limit * 1.1 / ndrives - and num > seconds * limit * 0.9 / ndrives) - - # Set vm clock to a known value - ns = seconds * nsec_per_sec - self.vm.qtest("clock_step %d" % ns) - - # Submit enough requests so the throttling mechanism kicks - # in. The throttled requests won't be executed until we - # advance the virtual clock. - rq_size = 512 - rd_nr = max(params['bps'] / rq_size / 2, - params['bps_rd'] / rq_size, - params['iops'] / 2, - params['iops_rd']) - rd_nr *= seconds * 2 - rd_nr /= ndrives - wr_nr = max(params['bps'] / rq_size / 2, - params['bps_wr'] / rq_size, - params['iops'] / 2, - params['iops_wr']) - wr_nr *= seconds * 2 - wr_nr /= ndrives - - # Send I/O requests to all drives - for i in range(rd_nr): - for drive in range(0, ndrives): - self.vm.hmp_qemu_io("drive%d" % drive, "aio_read %d %d" % - (i * rq_size, rq_size)) - - for i in range(wr_nr): - for drive in range(0, ndrives): - self.vm.hmp_qemu_io("drive%d" % drive, "aio_write %d %d" % - (i * rq_size, rq_size)) - - # We'll store the I/O stats for each drive in these arrays - start_rd_bytes = [0] * ndrives - start_rd_iops = [0] * ndrives - start_wr_bytes = [0] * ndrives - start_wr_iops = [0] * ndrives - end_rd_bytes = [0] * ndrives - end_rd_iops = [0] * ndrives - end_wr_bytes = [0] * ndrives - end_wr_iops = [0] * ndrives - - # Read the stats before advancing the clock - for i in range(0, ndrives): - start_rd_bytes[i], start_rd_iops[i], start_wr_bytes[i], \ - start_wr_iops[i] = self.blockstats('drive%d' % i) - - self.vm.qtest("clock_step %d" % ns) - - # Read the stats after advancing the clock - for i in range(0, ndrives): - end_rd_bytes[i], end_rd_iops[i], end_wr_bytes[i], \ - end_wr_iops[i] = self.blockstats('drive%d' % i) - - # Check that the I/O is within the limits and evenly distributed - for i in range(0, ndrives): - rd_bytes = end_rd_bytes[i] - start_rd_bytes[i] - rd_iops = end_rd_iops[i] - start_rd_iops[i] - wr_bytes = end_wr_bytes[i] - start_wr_bytes[i] - wr_iops = end_wr_iops[i] - start_wr_iops[i] - - self.assertTrue(check_limit(params['bps'], rd_bytes + wr_bytes)) - self.assertTrue(check_limit(params['bps_rd'], rd_bytes)) - self.assertTrue(check_limit(params['bps_wr'], wr_bytes)) - self.assertTrue(check_limit(params['iops'], rd_iops + wr_iops)) - self.assertTrue(check_limit(params['iops_rd'], rd_iops)) - self.assertTrue(check_limit(params['iops_wr'], wr_iops)) - - def test_all(self): - params = {"bps": 4096, - "bps_rd": 4096, - "bps_wr": 4096, - "iops": 10, - "iops_rd": 10, - "iops_wr": 10, - } - # Repeat the test with different numbers of drives - for ndrives in range(1, self.max_drives + 1): - # Pick each out of all possible params and test - for tk in params: - limits = dict([(k, 0) for k in params]) - limits[tk] = params[tk] * ndrives - self.configure_throttle(ndrives, limits) - self.do_test_throttle(ndrives, 5, limits) - - def test_burst(self): - params = {"bps": 4096, - "bps_rd": 4096, - "bps_wr": 4096, - "iops": 10, - "iops_rd": 10, - "iops_wr": 10, - } - ndrives = 1 - # Pick each out of all possible params and test - for tk in params: - rate = params[tk] * ndrives - burst_rate = rate * 7 - burst_length = 4 - - # Configure the throttling settings - settings = dict([(k, 0) for k in params]) - settings[tk] = rate - settings['%s_max' % tk] = burst_rate - settings['%s_max_length' % tk] = burst_length - self.configure_throttle(ndrives, settings) - - # Wait for the bucket to empty so we can do bursts - wait_ns = nsec_per_sec * burst_length * burst_rate / rate - self.vm.qtest("clock_step %d" % wait_ns) - - # Test I/O at the max burst rate - limits = dict([(k, 0) for k in params]) - limits[tk] = burst_rate - self.do_test_throttle(ndrives, burst_length, limits) - - # Now test I/O at the normal rate - limits[tk] = rate - self.do_test_throttle(ndrives, 5, limits) - -class ThrottleTestCoroutine(ThrottleTestCase): - test_img = "null-co://" - -if __name__ == '__main__': - iotests.main(supported_fmts=["raw"]) |