linux-kernel - Re: [PATCH v3 3/5] firmware: arm_scmi: Track basic SCMI statistics

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Message-ID: <57e6bded-8d10-4db8-ad2e-11dfd126205f@arm.com>
Date: Mon, 22 Jul 2024 13:21:31 +0100
From: Luke Parkin <luke.parkin@....com>
To: Peng Fan <peng.fan@....com>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 "linux-arm-kernel@...ts.infradead.org"
 <linux-arm-kernel@...ts.infradead.org>,
 "arm-scmi@...r.kernel.org" <arm-scmi@...r.kernel.org>
Cc: "sudeep.holla@....com" <sudeep.holla@....com>,
 "cristian.marussi@....com" <cristian.marussi@....com>
Subject: Re: [PATCH v3 3/5] firmware: arm_scmi: Track basic SCMI statistics

 > Just wonder that since ftrace is there, why need this?

Hi, this series aims to provide a useful debug aid for running tests on the SCMI
subsystem. As you mentioned, ftrace does report some of these statistics,
however DEBUG_STATISTICS will allow a programatic interface to access the count
of failures, successes and an extended variety of other specific
errors/statistics for automated (or manual) testing.

Hope this clears things up,
Luke