linux-kernel - RE: [RFC v2 3/3] platform/x86/intel/pmc: core: Report duration of time in HW sleep state

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Message-ID: <MN0PR12MB6101B9889A1C2ED2CEBBF380E2059@MN0PR12MB6101.namprd12.prod.outlook.com>
Date:   Mon, 14 Nov 2022 19:06:42 +0000
From:   "Limonciello, Mario" <Mario.Limonciello@....com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Sven van Ashbrook <svenva@...omium.org>,
        Rafael J Wysocki <rafael@...nel.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>,
        Rajneesh Bhardwaj <irenic.rajneesh@...il.com>,
        David E Box <david.e.box@...el.com>
CC:     "S-k, Shyam-sundar" <Shyam-sundar.S-k@....com>,
        "rrangel@...omium.org" <rrangel@...omium.org>,
        Rajat Jain <rajatja@...gle.com>,
        Hans de Goede <hdegoede@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Mark Gross <markgross@...nel.org>
Subject: RE: [RFC v2 3/3] platform/x86/intel/pmc: core: Report duration of
 time in HW sleep state

[Public]



> -----Original Message-----
> From: Thomas Gleixner <tglx@...utronix.de>
> Sent: Sunday, November 13, 2022 17:57
> To: Limonciello, Mario <Mario.Limonciello@....com>; Sven van Ashbrook
> <svenva@...omium.org>; Rafael J Wysocki <rafael@...nel.org>; linux-
> pm@...r.kernel.org; platform-driver-x86@...r.kernel.org; Rajneesh
> Bhardwaj <irenic.rajneesh@...il.com>; David E Box
> <david.e.box@...el.com>
> Cc: S-k, Shyam-sundar <Shyam-sundar.S-k@....com>;
> rrangel@...omium.org; Rajat Jain <rajatja@...gle.com>; Hans de Goede
> <hdegoede@...hat.com>; linux-kernel@...r.kernel.org; Limonciello, Mario
> <Mario.Limonciello@....com>; Mark Gross <markgross@...nel.org>
> Subject: Re: [RFC v2 3/3] platform/x86/intel/pmc: core: Report duration of
> time in HW sleep state
> 
> On Thu, Nov 10 2022 at 00:47, Mario Limonciello wrote:
> > intel_pmc_core displays a warning when a suspend didn't get to a HW
> > sleep state.
> 
> Where? Copy and paste is wonderful...

In current mainline, drivers/platform/x86/intel/pmc/core.c line 2130 will
show such a warning.

"CPU did not enter SLP_S0!!! (S0ix cnt=%llu)"