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Fri, 3 Jul 2020 16:07:56 +0000 Received: from AM0PR10MB1939.EURPRD10.PROD.OUTLOOK.COM ([fe80::8caa:9b1d:cdac:a787]) by AM0PR10MB1939.EURPRD10.PROD.OUTLOOK.COM ([fe80::8caa:9b1d:cdac:a787%5]) with mapi id 15.20.3153.027; Fri, 3 Jul 2020 16:07:56 +0000 From: "Moessbauer, Felix" To: Thomas Monjalon CC: "dev@dpdk.org" Thread-Topic: [RFC PATCH 0/1] Add l2reflect measurement application Thread-Index: AdZRU9094gi2JGnDSHa3Bkc5Oe22sg== Date: Fri, 3 Jul 2020 16:07:56 +0000 Message-ID: Accept-Language: en-US Content-Language: de-DE X-MS-Has-Attach: X-MS-TNEF-Correlator: x-document-confidentiality: NotClassified authentication-results: monjalon.net; dkim=none (message not signed) header.d=none;monjalon.net; dmarc=none action=none header.from=siemens.com; x-originating-ip: [165.225.27.16] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: ab3bf502-348c-46db-d861-08d81f6b3ff2 x-ms-traffictypediagnostic: AM0PR10MB3171: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:10000; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: siemens.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: AM0PR10MB1939.EURPRD10.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-Network-Message-Id: ab3bf502-348c-46db-d861-08d81f6b3ff2 X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Jul 2020 16:07:56.6717 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 38ae3bcd-9579-4fd4-adda-b42e1495d55a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: gGSKUKODshHn8Jr8/8BBlhEVDG1FpZgmHeQZtfu5gcbnjmyO7aKLwNPEXIvLaekk5H88wAKBwcWob6KC48Fvgn11Ifb8rIwXFoPdgI76i2s= X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR10MB3171 Subject: Re: [dpdk-dev] [RFC PATCH 0/1] Add l2reflect measurement application X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" > 03/07/2020 17:18, Felix Moessbauer: > > Dear Maintainers, > > > > this patch adds a measurement application to benchmark the latency of > > transmitting l2 packets via DPDK. >=20 > Are you using a real time system to reduce latency? Yes, we use a Debian buster with preempt-rt patched kernel. Additionally, we use isolcpus for the RT relevant threads. Apart from achieving low latency, we use this tool to measure the maximum l= atency over a long period of time. This gives a good estimate that the system behaves deterministically, even = under high load. The tool also has a built-in mechanism to set trace points when a threshold= is hit, to later inspect the kernel logs. >=20 > > We add this application to the examples folder, as similar tools were > > placed there as well. >=20 > No, the examples are not supposed to be tools. > They demonstrate some APIs. >=20 > If it is a tool to measure performance, and can be used in a CI, I think = it is better > hosted in the directory apps/. >=20 Ok, got it. There were some issues reported by checkpatch. I'll fix them an= d move to apps. Thanks for the hint!