linux-kernel - Re: [PATCH] oprofile: check whether oprofile perf enabled in op_overflow

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Message-ID: <52F9A82F.3060806@huawei.com>
Date:	Tue, 11 Feb 2014 12:33:51 +0800
From:	Weng Meiling <wengmeiling.weng@...wei.com>
To:	Will Deacon <will.deacon@....com>
CC:	Robert Richter <rric@...nel.org>,
	"oprofile-list@...ts.sf.net" <oprofile-list@...ts.sf.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Li Zefan <lizefan@...wei.com>,
	"wangnan0@...wei.com" <wangnan0@...wei.com>,
	"zhangwei(Jovi)" <jovi.zhangwei@...wei.com>,
	Huang Qiang <h.huangqiang@...wei.com>,
	"sdu.liu@...wei.com" <sdu.liu@...wei.com>
Subject: Re: [PATCH] oprofile: check whether oprofile perf enabled in op_overflow_handler()

Hi Will,

> 
>>> how userland can be notified about throttling. Throttling could be
>>> worth for operf too, not only for the oprofile kernel driver.
>>>
> 
>>> From a quick look it seems there is also code in x86 that dynamically
>>> adjusts the rate which might be worth being implemented for ARM too.
>>
>> Are you referring to the perf_sample_event_took callback? If so, that
>> certainly looks worth persuing. I'll stick it on my list, thanks!
>>

Is there any progress on this work? Because this is important for me.
Sorry for trouble you.

Thanks!
Weng Meiling


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