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bh=+5cZhGfdH0mWZaKM1/ZnrXjXQouCmHUFDVzSpDSzyic=; b=LaT2xg3+8L8qLjrHFPHy3dM5TXnABiYoS/KGvY0QhudJmkH6jaV30DJJZ6F7mAXDyyhrUy L3krnRwNGBGDcJC+5eFG8rY8Ph+4FM2YB2pzmi2gAS3lXqARSfJ4m/MZONZy7xLtqpLl0z Z5joObJ1MihTYHS5SMeVcVyq80/mOtM= X-MC-Unique: o8NidpluNGi9SDoon_WxDQ-1 From: Max Reitz To: qemu-block@nongnu.org Subject: [PULL 19/30] scripts/simplebench: use standard deviation for +- error Date: Fri, 18 Dec 2020 16:12:38 +0100 Message-Id: <20201218151249.715731-20-mreitz@redhat.com> In-Reply-To: <20201218151249.715731-1-mreitz@redhat.com> References: <20201218151249.715731-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mreitz@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=63.128.21.124; envelope-from=mreitz@redhat.com; helo=us-smtp-delivery-124.mimecast.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, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=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: , Cc: Kevin Wolf , Peter Maydell , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Vladimir Sementsov-Ogievskiy Standard deviation is more usual to see after +- than current maximum of deviations. Signed-off-by: Vladimir Sementsov-Ogievskiy Message-Id: <20201021145859.11201-16-vsementsov@virtuozzo.com> Reviewed-by: Max Reitz Signed-off-by: Max Reitz --- scripts/simplebench/simplebench.py | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/scripts/simplebench/simplebench.py b/scripts/simplebench/simpl= ebench.py index 2251cd34ea..55ec1ad5db 100644 --- a/scripts/simplebench/simplebench.py +++ b/scripts/simplebench/simplebench.py @@ -18,6 +18,8 @@ # along with this program. If not, see . # =20 +import statistics + =20 def bench_one(test_func, test_env, test_case, count=3D5, initial_run=3DTru= e): """Benchmark one test-case @@ -40,7 +42,7 @@ def bench_one(test_func, test_env, test_case, count=3D5, = initial_run=3DTrue): 'dimension': dimension of results, may be 'seconds' or 'iops' 'average': average value (iops or seconds) per run (exists only i= f at least one run succeeded) - 'delta': maximum delta between test_func result and the average + 'stdev': standard deviation of results (exists only if at least one run succeeded) 'n-failed': number of failed runs (exists only if at least one run failed) @@ -67,10 +69,9 @@ def bench_one(test_func, test_env, test_case, count=3D5,= initial_run=3DTrue): assert all('seconds' in r for r in succeeded) assert all('iops' not in r for r in succeeded) dim =3D 'seconds' - avg =3D sum(r[dim] for r in succeeded) / len(succeeded) result['dimension'] =3D dim - result['average'] =3D avg - result['delta'] =3D max(abs(r[dim] - avg) for r in succeeded) + result['average'] =3D statistics.mean(r[dim] for r in succeeded) + result['stdev'] =3D statistics.stdev(r[dim] for r in succeeded) =20 if len(succeeded) < count: result['n-failed'] =3D count - len(succeeded) @@ -81,7 +82,7 @@ def bench_one(test_func, test_env, test_case, count=3D5, = initial_run=3DTrue): def ascii_one(result): """Return ASCII representation of bench_one() returned dict.""" if 'average' in result: - s =3D '{:.2f} +- {:.2f}'.format(result['average'], result['delta']) + s =3D '{:.2f} +- {:.2f}'.format(result['average'], result['stdev']) if 'n-failed' in result: s +=3D '\n({} failed)'.format(result['n-failed']) return s --=20 2.29.2