From: Karim Yaghmour <karim.yaghmour@opersys.com>
To: "zhangwei(Jovi)" <jovi.zhangwei@huawei.com>
Cc: linux-kernel@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>,
mingo@elte.hu
Subject: Re: Reading perf counters at ftrace trace boundaries
Date: Mon, 12 Aug 2013 12:26:57 -0300 [thread overview]
Message-ID: <5208FEC1.7010206@opersys.com> (raw)
In-Reply-To: <52084774.7010009@huawei.com>
On 13-08-11 11:24 PM, zhangwei(Jovi) wrote:
> If you want to base on ftrace, below two approach maybe take into use:
>
> - register_ftrace_function/unregister_ftrace_function
>
> - perf_event_create_kernel_counter (function event id is 1)
>
> the first one is simplest, IMO.
Thx for the pointers.
> You need to write your own kernel module to use these approach.
As a proof-of-concept, sure. For something more permanent it would make
more sense to adapt the various perf/ftrace tools to make this available
on the command line with other options. But we're far away from that for
the moment.
--
Karim Yaghmour
CEO - Opersys inc. / www.opersys.com
http://twitter.com/karimyaghmour
next prev parent reply other threads:[~2013-08-12 15:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-12 0:03 Reading perf counters at ftrace trace boundaries Karim Yaghmour
2013-08-12 1:23 ` Andi Kleen
2013-08-12 1:39 ` Karim Yaghmour
2013-08-12 1:47 ` Andi Kleen
2013-08-12 1:59 ` Karim Yaghmour
2013-08-12 2:24 ` zhangwei(Jovi)
2013-08-12 15:26 ` Karim Yaghmour [this message]
2013-08-13 7:12 ` zhangwei(Jovi)
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