From: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Tom Zanussi <tzanussi@gmail.com>,
linux-kernel@vger.kernel.org, mingo@elte.hu, rostedt@goodmis.org,
k-keiichi@bx.jp.nec.com
Subject: Re: [RFC PATCH 2/7] perf: add pipe-specific header read/write and event processing code
Date: Sat, 27 Mar 2010 19:57:47 -0300 [thread overview]
Message-ID: <20100327225747.GI23594@ghostprotocols.net> (raw)
In-Reply-To: <20100327031455.GN7166@nowhere>
Em Sat, Mar 27, 2010 at 04:14:57AM +0100, Frederic Weisbecker escreveu:
> On Wed, Mar 03, 2010 at 01:05:24AM -0600, Tom Zanussi wrote:
> >
> > +int perf_header__write_pipe(struct perf_header *self, int fd)
> > +{
> > + struct perf_file_header_pipe f_header;
> > + int err;
> > +
> > + f_header = (struct perf_file_header_pipe){
> > + .magic = PERF_MAGIC,
> > + .size = sizeof(f_header),
> > + };
> I actually wonder why you bother with a header in the pipe mode,
> since it only contains MAGIC and its size.
Because he wants to detect endianness :-)
- ARnaldo
next prev parent reply other threads:[~2010-03-27 22:57 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-03 7:05 [RFC PATCH 0/7] perf: 'live mode' Tom Zanussi
2010-03-03 7:05 ` [RFC PATCH 1/7] perf: introduce special handling for pipe input/output Tom Zanussi
2010-03-03 7:05 ` [RFC PATCH 2/7] perf: add pipe-specific header read/write and event processing code Tom Zanussi
2010-03-27 3:14 ` Frederic Weisbecker
2010-03-27 22:57 ` Arnaldo Carvalho de Melo [this message]
2010-03-27 23:05 ` Arnaldo Carvalho de Melo
2010-03-27 23:12 ` Frederic Weisbecker
2010-03-28 0:15 ` Arnaldo Carvalho de Melo
2010-03-03 7:05 ` [RFC PATCH 3/7] perf: convert perf header attrs into attr events Tom Zanussi
2010-03-03 7:05 ` [RFC PATCH 4/7] perf: convert perf event types into event type events Tom Zanussi
2010-03-03 7:05 ` [RFC PATCH 5/7] perf: convert perf tracing data into a tracing_data event Tom Zanussi
2010-03-03 7:05 ` [RFC PATCH 6/7] perf: convert perf header build_ids into build_id events Tom Zanussi
2010-03-03 7:05 ` [RFC PATCH 7/7] perf trace/scripting: rwtop and sctop scripts Tom Zanussi
2010-03-04 11:18 ` [RFC PATCH 0/7] perf: 'live mode' Ingo Molnar
2010-03-27 23:00 ` Arnaldo Carvalho de Melo
2010-03-28 5:04 ` Tom Zanussi
2010-03-27 0:57 ` Frederic Weisbecker
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