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qemu with hax to log dma reads & writes jcs.org/2018/11/12/vfio
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scripts/simplebench: add example usage of simplebench

This example may be used as a template for custom benchmark.
It illustrates three things to prepare:
- define bench_func
- define test environments (columns)
- define test cases (rows)
And final call of simplebench API.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Message-Id: <20200228071914.11746-4-vsementsov@virtuozzo.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

authored by

Vladimir Sementsov-Ogievskiy and committed by
Eduardo Habkost 28c4992a 3e36da64

+80
+80
scripts/simplebench/bench-example.py
··· 1 + #!/usr/bin/env python3 2 + # 3 + # Benchmark example 4 + # 5 + # Copyright (c) 2019 Virtuozzo International GmbH. 6 + # 7 + # This program is free software; you can redistribute it and/or modify 8 + # it under the terms of the GNU General Public License as published by 9 + # the Free Software Foundation; either version 2 of the License, or 10 + # (at your option) any later version. 11 + # 12 + # This program is distributed in the hope that it will be useful, 13 + # but WITHOUT ANY WARRANTY; without even the implied warranty of 14 + # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 + # GNU General Public License for more details. 16 + # 17 + # You should have received a copy of the GNU General Public License 18 + # along with this program. If not, see <http://www.gnu.org/licenses/>. 19 + # 20 + 21 + import simplebench 22 + from bench_block_job import bench_block_copy, drv_file, drv_nbd 23 + 24 + 25 + def bench_func(env, case): 26 + """ Handle one "cell" of benchmarking table. """ 27 + return bench_block_copy(env['qemu_binary'], env['cmd'], 28 + case['source'], case['target']) 29 + 30 + 31 + # You may set the following five variables to correct values, to turn this 32 + # example to real benchmark. 33 + ssd_source = '/path-to-raw-source-image-at-ssd' 34 + ssd_target = '/path-to-raw-target-image-at-ssd' 35 + hdd_target = '/path-to-raw-source-image-at-hdd' 36 + nbd_ip = 'nbd-ip-addr' 37 + nbd_port = 'nbd-port-number' 38 + 39 + # Test-cases are "rows" in benchmark resulting table, 'id' is a caption for 40 + # the row, other fields are handled by bench_func. 41 + test_cases = [ 42 + { 43 + 'id': 'ssd -> ssd', 44 + 'source': drv_file(ssd_source), 45 + 'target': drv_file(ssd_target) 46 + }, 47 + { 48 + 'id': 'ssd -> hdd', 49 + 'source': drv_file(ssd_source), 50 + 'target': drv_file(hdd_target) 51 + }, 52 + { 53 + 'id': 'ssd -> nbd', 54 + 'source': drv_file(ssd_source), 55 + 'target': drv_nbd(nbd_ip, nbd_port) 56 + }, 57 + ] 58 + 59 + # Test-envs are "columns" in benchmark resulting table, 'id is a caption for 60 + # the column, other fields are handled by bench_func. 61 + test_envs = [ 62 + { 63 + 'id': 'backup-1', 64 + 'cmd': 'blockdev-backup', 65 + 'qemu_binary': '/path-to-qemu-binary-1' 66 + }, 67 + { 68 + 'id': 'backup-2', 69 + 'cmd': 'blockdev-backup', 70 + 'qemu_binary': '/path-to-qemu-binary-2' 71 + }, 72 + { 73 + 'id': 'mirror', 74 + 'cmd': 'blockdev-mirror', 75 + 'qemu_binary': '/path-to-qemu-binary-1' 76 + } 77 + ] 78 + 79 + result = simplebench.bench(bench_func, test_envs, test_cases, count=3) 80 + print(simplebench.ascii(result))