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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=40.107.8.108; envelope-from=vsementsov@virtuozzo.com; helo=EUR04-VI1-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @virtuozzo.com) Content-Type: text/plain; charset="utf-8" Add an option to drop caches before each test run. It may probably improve reliability of results when testing in cached mode. Signed-off-by: Vladimir Sementsov-Ogievskiy --- scripts/simplebench/bench-backup.py | 6 +++++- scripts/simplebench/simplebench.py | 11 ++++++++++- 2 files changed, 15 insertions(+), 2 deletions(-) diff --git a/scripts/simplebench/bench-backup.py b/scripts/simplebench/benc= h-backup.py index 092fed5816..5a0675c593 100755 --- a/scripts/simplebench/bench-backup.py +++ b/scripts/simplebench/bench-backup.py @@ -156,7 +156,8 @@ def bench(args): }) =20 result =3D simplebench.bench(bench_func, test_envs, test_cases, - count=3Dargs.count, initial_run=3Dargs.init= ial_run) + count=3Dargs.count, initial_run=3Dargs.init= ial_run, + drop_caches=3Dargs.drop_caches) with open('results.json', 'w') as f: json.dump(result, f, indent=3D4) print(results_to_text(result)) @@ -221,4 +222,7 @@ def __call__(self, parser, namespace, values, option_st= ring=3DNone): Do additional initial run per cell which doesn't count in result, default true''') =20 + p.add_argument('--drop-caches', action=3D'store_true', help=3D'''\ +Do "sync; echo 3 > /proc/sys/vm/drop_caches" before each test run''') + bench(p.parse_args()) diff --git a/scripts/simplebench/simplebench.py b/scripts/simplebench/simpl= ebench.py index 27bc4d4715..8efca2af98 100644 --- a/scripts/simplebench/simplebench.py +++ b/scripts/simplebench/simplebench.py @@ -19,11 +19,17 @@ # =20 import statistics +import subprocess import time =20 =20 +def do_drop_caches(): + subprocess.run('sync; echo 3 > /proc/sys/vm/drop_caches', shell=3DTrue, + check=3DTrue) + + def bench_one(test_func, test_env, test_case, count=3D5, initial_run=3DTru= e, - slow_limit=3D100): + slow_limit=3D100, drop_caches=3DFalse): """Benchmark one test-case =20 test_func -- benchmarking function with prototype @@ -40,6 +46,7 @@ def bench_one(test_func, test_env, test_case, count=3D5, = initial_run=3DTrue, initial_run -- do initial run of test_func, which don't get into result slow_limit -- stop at slow run (that exceedes the slow_limit by secon= ds). (initial run is not measured) + drop_caches -- drop caches before each run =20 Returns dict with the following fields: 'runs': list of test_func results @@ -53,6 +60,7 @@ def bench_one(test_func, test_env, test_case, count=3D5, = initial_run=3DTrue, """ if initial_run: print(' #initial run:') + do_drop_caches() print(' ', test_func(test_env, test_case)) =20 runs =3D [] @@ -60,6 +68,7 @@ def bench_one(test_func, test_env, test_case, count=3D5, = initial_run=3DTrue, t =3D time.time() =20 print(' #run {}'.format(i+1)) + do_drop_caches() res =3D test_func(test_env, test_case) print(' ', res) runs.append(res) --=20 2.29.2