From: Andy Tang <andy.tang@nxp.com>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: "rjw@rjwysocki.net" <rjw@rjwysocki.net>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>
Subject: RE: [EXT] Re: Ask for help about cpufreq issue
Date: Thu, 13 Feb 2020 09:21:44 +0000 [thread overview]
Message-ID: <VI1PR04MB4333C0B4809EDE783CBF2025F31A0@VI1PR04MB4333.eurprd04.prod.outlook.com> (raw)
In-Reply-To: <20200213091536.bwxyuwjzga4uogeb@vireshk-i7>
Appreciate your help.
Thanks,
Andy
> -----Original Message-----
> From: Viresh Kumar <viresh.kumar@linaro.org>
> Sent: 2020年2月13日 17:16
> To: Andy Tang <andy.tang@nxp.com>
> Cc: rjw@rjwysocki.net; linux-pm@vger.kernel.org
> Subject: Re: [EXT] Re: Ask for help about cpufreq issue
>
> Caution: EXT Email
>
> On 13-02-20, 09:12, Andy Tang wrote:
> > Hi Viresh,
> >
> > > -----Original Message-----
> > > From: Viresh Kumar <viresh.kumar@linaro.org>
> > > Sent: 2020年2月13日 16:48
> > > To: Andy Tang <andy.tang@nxp.com>
> > > Cc: rjw@rjwysocki.net; linux-pm@vger.kernel.org
> > > Subject: Re: [EXT] Re: Ask for help about cpufreq issue
> > >
> > > I agree. Which means that there are some spikes of work getting
> > > scheduled on CPUs. The load will increase slowly and will also
> > > decrease slowly
> > > (step-by-step) with conservative governor.
> > >
> > > > So I can't understand why cpu frequency increased?
> > >
> > > Tracing or debugging cs_dbs_update() in conservative governor is the
> > > only way out I would suggest.
> > What's the *TRACING" here referring to? Could you please explain more
> about it?
> > I have no idea what it is.
>
> Sorry about that, I was talking about the in-kernel function tracer here.
>
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.
> kernel.org%2Fdoc%2FDocumentation%2Ftrace%2Fftrace.txt&data=02%
> 7C01%7Candy.tang%40nxp.com%7Ce9d217e1e493426ff8a708d7b0654c77%
> 7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C63717182142741422
> 1&sdata=HXTASVHLewwjZhX3W9dna9wD87arEgK95snQP7UNZgc%3D
> &reserved=0
>
> --
> viresh
next prev parent reply other threads:[~2020-02-13 9:22 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-07 5:09 Ask for help about cpufreq issue Andy Tang
2020-02-07 5:23 ` Viresh Kumar
2020-02-07 6:03 ` [EXT] " Andy Tang
2020-02-07 7:05 ` Viresh Kumar
2020-02-11 4:20 ` Andy Tang
2020-02-11 5:53 ` Viresh Kumar
2020-02-11 6:23 ` Andy Tang
2020-02-11 6:34 ` Viresh Kumar
2020-02-11 7:20 ` Andy Tang
2020-02-12 10:11 ` Andy Tang
2020-02-12 11:50 ` Viresh Kumar
2020-02-13 8:18 ` Andy Tang
2020-02-13 8:48 ` Viresh Kumar
2020-02-13 9:12 ` Andy Tang
2020-02-13 9:15 ` Viresh Kumar
2020-02-13 9:21 ` Andy Tang [this message]
2020-02-14 10:00 ` Andy Tang
2020-02-17 8:22 ` Viresh Kumar
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