From: Chanwoo Choi <cw00.choi@samsung.com>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: rjw@sisk.pl, linux-kernel@vger.kernel.org,
Kyungmin Park <kyungmin.park@samsung.com>,
Myungjoo Ham <myungjoo.ham@samsung.com>
Subject: Re: [PATCH v2] cpufreq: stats: Add 'load_table' debugfs file to show accumulated data of CPUs
Date: Fri, 21 Jun 2013 13:01:35 +0900 [thread overview]
Message-ID: <51C3D01F.7040907@samsung.com> (raw)
In-Reply-To: <CAKohpo=0m8+WegUmMR2BOKeY2mJZw=X5-nEAp26M5L3PH9Bz2A@mail.gmail.com>
On 06/21/2013 12:42 AM, Viresh Kumar wrote:
> On 20 June 2013 16:48, Chanwoo Choi <cw00.choi@samsung.com> wrote:
>> But,
>> To show old frequency/new frequency on load_table debugfs file,
>> governor function(dbs_check_cpu()) pass calculated CPUs load to specific governor(e.g., ondemand)
>> as below function flow.
>>
>> dbs_check_cpu() (in cpufreq.c)
>> -> od_check_cpu() (in cpufreq_ondemand.c)
>> -> __cpufreq_driver_target() (in cpufreq.c)
>> -> cpufreq_driver->target(policy)
>>
>> Also, The __cpufreq_driver_target() is external function which can be called on other file
>> so I must consider exception case.
>>
>> If send CPUFREQ_LOADCHECK noti after changed cpu frequency,
>> I think it is complicated and has quite a little difficulty.
>>
>> What is your opinion?
>
> What you can do is:
> - create another routine: cpufreq_governor_driver_target()
> - replace all __cpufreq_driver_target() from ondemand/conservative governors
> with this one
> - In cpufreq_governor_driver_target() call __cpufreq_driver_target() and
> take a note of new freq.
>
> Maybe you don't need to check the actual freq that is set (even
> that would be simple to implement), but what is requested.
>
OK, I understand and will try to implement it.
Thanks.
@Rafael?
If possible, I want to know the your opinion about this.
Best Regards,
Chanwoo Choi
next prev parent reply other threads:[~2013-06-21 4:01 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-20 8:22 [PATCH v2] cpufreq: stats: Add 'load_table' debugfs file to show accumulated data of CPUs Chanwoo Choi
2013-06-20 9:03 ` Viresh Kumar
2013-06-20 10:45 ` Chanwoo Choi
2013-06-20 10:55 ` Viresh Kumar
2013-06-20 10:59 ` Chanwoo Choi
2013-06-20 11:18 ` Chanwoo Choi
2013-06-20 15:42 ` Viresh Kumar
2013-06-21 4:01 ` Chanwoo Choi [this message]
2013-06-21 13:13 ` Rafael J. Wysocki
2013-06-24 6:18 ` Viresh Kumar
2013-06-24 9:39 ` Rafael J. Wysocki
2013-06-24 9:41 ` Viresh Kumar
2013-06-24 10:20 ` Rafael J. Wysocki
2013-06-24 10:33 ` Viresh Kumar
2013-06-24 11:00 ` Rafael J. Wysocki
2013-06-24 11:18 ` Chanwoo Choi
2013-06-24 8:32 ` Chanwoo Choi
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