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Fri, 24 Jan 2020 21:25:22 +0000 From: Song Liu To: "lsf-pc@lists.linux-foundation.org" , bpf CC: linux-kernel Subject: [LSF/MM/BPF TOPIC] ls+cat based debugging for BPF Thread-Topic: [LSF/MM/BPF TOPIC] ls+cat based debugging for BPF Thread-Index: AQHV0vzJAHvUmDTCaE+/nrClRclyqQ== Date: Fri, 24 Jan 2020 21:25:22 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.3608.40.2.2.4) x-originating-ip: [2620:10d:c090:200::3:f503] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: fc0a86f9-f832-4bb5-5b24-08d7a113eb94 x-ms-traffictypediagnostic: BYAPR15MB3303: x-microsoft-antispam-prvs: x-fb-source: Internal x-ms-oob-tlc-oobclassifiers: OLM:9508; x-forefront-prvs: 02929ECF07 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(396003)(346002)(376002)(136003)(39860400002)(366004)(199004)(189003)(4743002)(110136005)(8936002)(4326008)(8676002)(81156014)(316002)(81166006)(36756003)(33656002)(6512007)(6506007)(86362001)(478600001)(2616005)(186003)(6486002)(66556008)(4744005)(2906002)(5660300002)(66476007)(66446008)(64756008)(71200400001)(76116006)(91956017)(66946007);DIR:OUT;SFP:1102;SCL:1;SRVR:BYAPR15MB3303;H:BYAPR15MB3029.namprd15.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; 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This approach is different to the habit of some system admins, who do these works via ls+cat in sysfs. In this LSF/MM/BPF, we would like to discuss whether/how to enable similar debugging interface for BPF programs and=20 maps. Specifically, we can discuss: 1) What inforamtions to show in sysfs/bpffs; 2) Granularity to enable/disable these information; 3) Will there be any overhead? If so, how much overhead is acceptable. These discussions should save us a lot of time over emails.=20 I will share a prototype of this before LSF/MM/BPF. Thanks, Song