From: David Ahern <dsahern@gmail.com>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
acme@ghostprotocols.net, mingo@elte.hu, peterz@infradead.org,
paulus@samba.org, tglx@linutronix.de
Subject: Re: [PATCH 3/6] perf: add reference time event
Date: Fri, 17 Jun 2011 08:28:44 -0600 [thread overview]
Message-ID: <4DFB649C.8030303@gmail.com> (raw)
In-Reply-To: <20110617141707.GE25197@somewhere.redhat.com>
On 06/17/2011 08:17 AM, Frederic Weisbecker wrote:
>>> We would like to avoid adding more custom events like these. They were very convenient
>>> but they steal the kernel event type space. They are deemed for removal in the long term.
>>>
>>> Another idea to achieve what you want would be to create a new perf event header feature,
>>> like HEADER_TRACE_INFO or HEADER_BUILD_ID are. Then use that to create a space in the perf
>>> file to save that couple of clocks initial values.
>>
>> you mean like this:
>> https://lkml.org/lkml/2010/12/7/813
>>
>> David
>
> Exactly, why did you change?
As I recall suggestions on adding new clock events and using those for
periodic samples. Once we have the initial correlation (the point of
this patch) and updates to xtime (the new tracepoints) periodic events
should not be needed.
I'll go back to this option -- and address comments from that round as well.
David
next prev parent reply other threads:[~2011-06-17 14:28 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-07 23:53 [PATCH 0/6] Add time-of-day option to perf events David Ahern
2011-06-07 23:55 ` [PATCH 1/6] trace: add tracepoints to timekeeping code - xtime changes David Ahern
2011-06-17 13:23 ` Frederic Weisbecker
2011-06-17 14:13 ` David Ahern
2011-06-17 14:19 ` Frederic Weisbecker
2011-08-15 4:03 ` David Ahern
2011-06-07 23:55 ` [PATCH 2/6] perf utils: export parse_single_tracepoint_event David Ahern
2011-06-07 23:55 ` [PATCH 3/6] perf: add reference time event David Ahern
2011-06-17 13:32 ` Frederic Weisbecker
2011-06-17 14:04 ` David Ahern
2011-06-17 14:17 ` Frederic Weisbecker
2011-06-17 14:28 ` David Ahern [this message]
2011-07-11 4:20 ` David Ahern
2011-07-12 14:30 ` Frederic Weisbecker
2011-07-12 16:35 ` David Ahern
2011-07-12 17:03 ` Frederic Weisbecker
2011-08-04 15:10 ` David Ahern
[not found] ` <20110808193033.GA2744@ghostprotocols.net>
2011-08-15 4:06 ` David Ahern
2011-06-07 23:56 ` [PATCH 4/6] perf record: add time-of-day option David Ahern
2011-06-17 14:14 ` Frederic Weisbecker
2011-06-17 14:23 ` David Ahern
2011-06-17 15:15 ` Frederic Weisbecker
2011-08-15 4:24 ` David Ahern
2011-06-07 23:56 ` [PATCH 5/6] perf script: pass trace event to print_trace_event David Ahern
2011-06-07 23:56 ` [PATCH 6/6] perf script: add time-of-day option for displaying events David Ahern
2011-06-14 18:42 ` [PATCH 0/6] Add time-of-day option to perf events David Ahern
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