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client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by CH1PEPF0000A34A.mail.protection.outlook.com (10.167.244.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8769.18 via Frontend Transport; Wed, 21 May 2025 05:33:09 +0000 Received: from [10.252.216.136] (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Wed, 21 May 2025 00:33:02 -0500 Message-ID: Date: Wed, 21 May 2025 11:02:46 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 4/8] perf sched stats: Add support for report subcommand To: Peter Zijlstra CC: , , , , , , , , , , , , , , , , , , , , , , , , , , James Clark References: <20250311120230.61774-1-swapnil.sapkal@amd.com> <20250311120230.61774-5-swapnil.sapkal@amd.com> <20250520103647.GH16434@noisy.programming.kicks-ass.net> Content-Language: en-US From: "Sapkal, Swapnil" In-Reply-To: <20250520103647.GH16434@noisy.programming.kicks-ass.net> Content-Type: text/plain; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 May 2025 05:33:09.5410 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d6c58f63-cade-4130-a044-08dd9828f8c0 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CH1PEPF0000A34A.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB7241 Hi Peter, On 5/20/2025 4:06 PM, Peter Zijlstra wrote: > On Tue, Mar 11, 2025 at 12:02:26PM +0000, Swapnil Sapkal wrote: >> `perf sched stats record` captures two sets of samples. For workload >> profile, first set right before workload starts and second set after >> workload finishes. For the systemwide profile, first set at the >> beginning of profile and second set on receiving SIGINT signal. >> >> Add `perf sched stats report` subcommand that will read both the set >> of samples, get the diff and render a final report. Final report prints >> scheduler stat at cpu granularity as well as sched domain granularity. >> >> Example usage: >> >> # perf sched stats record >> # perf sched stats report >> > >> +#ifdef DOMAIN_CATEGORY >> +DOMAIN_CATEGORY(" "); >> #endif >> +DOMAIN_FIELD(__u32, idle_lb_count, >> + "load_balance() count on cpu idle", "%11u", true, v15); >> +DOMAIN_FIELD(__u32, idle_lb_balanced, >> + "load_balance() found balanced on cpu idle", "%11u", true, v15); >> +DOMAIN_FIELD(__u32, idle_lb_failed, >> + "load_balance() move task failed on cpu idle", "%11u", true, v15); >> +DOMAIN_FIELD(__u32, idle_lb_imbalance, >> + "imbalance sum on cpu idle", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, idle_lb_gained, >> + "pull_task() count on cpu idle", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, idle_lb_hot_gained, >> + "pull_task() when target task was cache-hot on cpu idle", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, idle_lb_nobusyq, >> + "load_balance() failed to find busier queue on cpu idle", "%11u", true, v15); >> +DOMAIN_FIELD(__u32, idle_lb_nobusyg, >> + "load_balance() failed to find busier group on cpu idle", "%11u", true, v15); >> +#ifdef DERIVED_CNT_FIELD >> +DERIVED_CNT_FIELD("load_balance() success count on cpu idle", "%11u", >> + idle_lb_count, idle_lb_balanced, idle_lb_failed, v15); >> +#endif >> +#ifdef DERIVED_AVG_FIELD >> +DERIVED_AVG_FIELD("avg task pulled per successful lb attempt (cpu idle)", "%11.2Lf", >> + idle_lb_count, idle_lb_balanced, idle_lb_failed, idle_lb_gained, v15); >> +#endif >> +#ifdef DOMAIN_CATEGORY >> +DOMAIN_CATEGORY(" "); >> +#endif >> +DOMAIN_FIELD(__u32, busy_lb_count, >> + "load_balance() count on cpu busy", "%11u", true, v15); >> +DOMAIN_FIELD(__u32, busy_lb_balanced, >> + "load_balance() found balanced on cpu busy", "%11u", true, v15); >> +DOMAIN_FIELD(__u32, busy_lb_failed, >> + "load_balance() move task failed on cpu busy", "%11u", true, v15); >> +DOMAIN_FIELD(__u32, busy_lb_imbalance, >> + "imbalance sum on cpu busy", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, busy_lb_gained, >> + "pull_task() count on cpu busy", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, busy_lb_hot_gained, >> + "pull_task() when target task was cache-hot on cpu busy", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, busy_lb_nobusyq, >> + "load_balance() failed to find busier queue on cpu busy", "%11u", true, v15); >> +DOMAIN_FIELD(__u32, busy_lb_nobusyg, >> + "load_balance() failed to find busier group on cpu busy", "%11u", true, v15); >> +#ifdef DERIVED_CNT_FIELD >> +DERIVED_CNT_FIELD("load_balance() success count on cpu busy", "%11u", >> + busy_lb_count, busy_lb_balanced, busy_lb_failed, v15); >> +#endif >> +#ifdef DERIVED_AVG_FIELD >> +DERIVED_AVG_FIELD("avg task pulled per successful lb attempt (cpu busy)", "%11.2Lf", >> + busy_lb_count, busy_lb_balanced, busy_lb_failed, busy_lb_gained, v15); >> +#endif >> +#ifdef DOMAIN_CATEGORY >> +DOMAIN_CATEGORY(" "); >> +#endif >> +DOMAIN_FIELD(__u32, newidle_lb_count, >> + "load_balance() count on cpu newly idle", "%11u", true, v15); >> +DOMAIN_FIELD(__u32, newidle_lb_balanced, >> + "load_balance() found balanced on cpu newly idle", "%11u", true, v15); >> +DOMAIN_FIELD(__u32, newidle_lb_failed, >> + "load_balance() move task failed on cpu newly idle", "%11u", true, v15); >> +DOMAIN_FIELD(__u32, newidle_lb_imbalance, >> + "imbalance sum on cpu newly idle", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, newidle_lb_gained, >> + "pull_task() count on cpu newly idle", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, newidle_lb_hot_gained, >> + "pull_task() when target task was cache-hot on cpu newly idle", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, newidle_lb_nobusyq, >> + "load_balance() failed to find busier queue on cpu newly idle", "%11u", true, v15); >> +DOMAIN_FIELD(__u32, newidle_lb_nobusyg, >> + "load_balance() failed to find busier group on cpu newly idle", "%11u", true, v15); >> +#ifdef DERIVED_CNT_FIELD >> +DERIVED_CNT_FIELD("load_balance() success count on cpu newly idle", "%11u", >> + newidle_lb_count, newidle_lb_balanced, newidle_lb_failed, v15); >> +#endif >> +#ifdef DERIVED_AVG_FIELD >> +DERIVED_AVG_FIELD("avg task pulled per successful lb attempt (cpu newly idle)", "%11.2Lf", >> + newidle_lb_count, newidle_lb_balanced, newidle_lb_failed, newidle_lb_gained, v15); >> +#endif >> +#ifdef DOMAIN_CATEGORY >> +DOMAIN_CATEGORY(" "); >> +#endif >> +DOMAIN_FIELD(__u32, alb_count, >> + "active_load_balance() count", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, alb_failed, >> + "active_load_balance() move task failed", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, alb_pushed, >> + "active_load_balance() successfully moved a task", "%11u", false, v15); >> +#ifdef DOMAIN_CATEGORY >> +DOMAIN_CATEGORY(" "); >> +#endif >> +DOMAIN_FIELD(__u32, sbe_count, >> + "sbe_count is not used", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, sbe_balanced, >> + "sbe_balanced is not used", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, sbe_pushed, >> + "sbe_pushed is not used", "%11u", false, v15); >> +#ifdef DOMAIN_CATEGORY >> +DOMAIN_CATEGORY(" "); >> +#endif >> +DOMAIN_FIELD(__u32, sbf_count, >> + "sbf_count is not used", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, sbf_balanced, >> + "sbf_balanced is not used", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, sbf_pushed, >> + "sbf_pushed is not used", "%11u", false, v15); >> +#ifdef DOMAIN_CATEGORY >> +DOMAIN_CATEGORY(" "); >> +#endif >> +DOMAIN_FIELD(__u32, ttwu_wake_remote, >> + "try_to_wake_up() awoke a task that last ran on a diff cpu", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, ttwu_move_affine, >> + "try_to_wake_up() moved task because cache-cold on own cpu", "%11u", false, v15); >> +DOMAIN_FIELD(__u32, ttwu_move_balance, >> + "try_to_wake_up() started passive balancing", "%11u", false, v15); >> +#endif /* DOMAIN_FIELD */ > > So I have one request for a future version of this. Could we please add > a knob to print the output using the field name instead of the fancy > pants description? > Sure, I will add a knob to print the field name. > It is *MUCH* easier to grep the field name in the code than to try and > figure out wth this description is on about :-) > > That is, ttwu_wake_remote is infinitely better than "try_to_wake_up() > awake a task that last ran on a diff cpu" and so on. > I agree. > I realize I might be weird, but it should be simple enough to add and it > makes my life easier :-) Thank you for the suggestion. It is simple to add it. -- Thanks and Regards, Swapnil