From patchwork Tue Mar 14 10:33:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Luba X-Patchwork-Id: 663926 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D7BF4C6FD1C for ; Tue, 14 Mar 2023 10:36:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230156AbjCNKgO (ORCPT ); Tue, 14 Mar 2023 06:36:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53648 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229977AbjCNKfw (ORCPT ); Tue, 14 Mar 2023 06:35:52 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 3F00C1B3; Tue, 14 Mar 2023 03:35:14 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id F1EF5168F; Tue, 14 Mar 2023 03:35:12 -0700 (PDT) Received: from e123648.arm.com (unknown [10.57.19.101]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 7C7E33F71A; Tue, 14 Mar 2023 03:34:26 -0700 (PDT) From: Lukasz Luba To: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, rafael@kernel.org Cc: lukasz.luba@arm.com, dietmar.eggemann@arm.com, rui.zhang@intel.com, amit.kucheria@verdurent.com, amit.kachhap@gmail.com, daniel.lezcano@linaro.org, viresh.kumar@linaro.org, len.brown@intel.com, pavel@ucw.cz, Pierre.Gondois@arm.com, ionela.voinescu@arm.com, rostedt@goodmis.org, mhiramat@kernel.org Subject: [PATCH 05/17] trace: energy_model: Add trace event for EM runtime modifications Date: Tue, 14 Mar 2023 10:33:45 +0000 Message-Id: <20230314103357.26010-6-lukasz.luba@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230314103357.26010-1-lukasz.luba@arm.com> References: <20230314103357.26010-1-lukasz.luba@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The Energy Model (EM) supports runtime modifications. Track the changes in order to do post-processing analysis. Don't use arrays in the trace event, since they are not properly supported by the tools. Instead use simple "unroll" with emitting the trace event for each EM array entry with proper ID information. The older debugging mechanism which was the simple debugfs which dumping the EM content won't be sufficient for the modifiable EM purpose. This trace event mechanism would address the needs. Signed-off-by: Lukasz Luba --- include/trace/events/energy_model.h | 46 +++++++++++++++++++++++++++++ kernel/power/energy_model.c | 3 ++ 2 files changed, 49 insertions(+) create mode 100644 include/trace/events/energy_model.h diff --git a/include/trace/events/energy_model.h b/include/trace/events/energy_model.h new file mode 100644 index 000000000000..f70babeb5dde --- /dev/null +++ b/include/trace/events/energy_model.h @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM energy_model + +#if !defined(_TRACE_ENERGY_MODEL_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_ENERGY_MODEL_H + +#include + +TRACE_EVENT(em_perf_state, + TP_PROTO(const char *dev_name, int nr_perf_states, int state, + unsigned long ps_frequency, unsigned long ps_power, + unsigned long ps_cost, unsigned long ps_flags), + + TP_ARGS(dev_name, nr_perf_states, state, ps_frequency, ps_power, ps_cost, + ps_flags), + + TP_STRUCT__entry( + __string(name, dev_name) + __field(int, num_states) + __field(int, state) + __field(unsigned long, frequency) + __field(unsigned long, power) + __field(unsigned long, cost) + __field(unsigned long, flags) + ), + + TP_fast_assign( + __assign_str(name, dev_name); + __entry->num_states = nr_perf_states; + __entry->state = state; + __entry->frequency = ps_frequency; + __entry->power = ps_power; + __entry->cost = ps_cost; + __entry->flags = ps_flags; + ), + + TP_printk("dev_name=%s nr_perf_states=%d state=%d frequency=%lu power=%lu cost=%lu flags=%lu", + __get_str(name), __entry->num_states, __entry->state, + __entry->frequency, __entry->power, __entry->cost, + __entry->flags) +); +#endif /* _TRACE_ENERGY_MODEL_H */ + +/* This part must be outside protection */ +#include diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c index 937e98a71ed5..3b778743ba89 100644 --- a/kernel/power/energy_model.c +++ b/kernel/power/energy_model.c @@ -17,6 +17,9 @@ #include #include +#define CREATE_TRACE_POINTS +#include + /* * Mutex serializing the registrations of performance domains and letting * callbacks defined by drivers sleep.