From: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
To: David Sharp <dhsharp@google.com>
Cc: linux-kernel@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@linux.intel.com>
Subject: Re: [PATCH v5 1/3] tracing,x86: Add a TSC trace_clock
Date: Tue, 09 Oct 2012 11:08:08 +0900 [thread overview]
Message-ID: <50738708.1020900@hitachi.com> (raw)
In-Reply-To: <1349148680-9509-1-git-send-email-dhsharp@google.com>
Hi David,
This is a nice patch set.
I just have found something should be fixed, which related to
your work. I'll send it following this mail.
Would you mind adding these patches as your patch series?
Thanks,
Yoshihiro YUNOMAE
(2012/10/02 12:31), David Sharp wrote:
> In order to promote interoperability between userspace tracers and ftrace,
> add a trace_clock that reports raw TSC values which will then be recorded
> in the ring buffer. Userspace tracers that also record TSCs are then on
> exactly the same time base as the kernel and events can be unambiguously
> interlaced.
>
--
Yoshihiro YUNOMAE
Software Platform Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: yoshihiro.yunomae.ez@hitachi.com
next prev parent reply other threads:[~2012-10-09 2:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-02 3:31 [PATCH v5 1/3] tracing,x86: Add a TSC trace_clock David Sharp
2012-10-02 3:31 ` [PATCH v5 2/3] tracing: Reset ring buffer when changing trace_clocks David Sharp
2012-10-02 3:31 ` [PATCH v5 3/3] tracing: Format non-nanosec times from tsc clock without a decimal point David Sharp
2012-10-11 20:43 ` Steven Rostedt
2012-10-11 22:58 ` David Sharp
2012-10-09 2:08 ` Yoshihiro YUNOMAE [this message]
2012-10-11 23:30 ` [PATCH v5 1/3] tracing,x86: Add a TSC trace_clock David Sharp
2012-10-09 2:08 ` [PATCH 0/2] ftrace: [BUGFIX] type of ring_buffer_oldest_event_ts() and showing of stats per cpu directory Yoshihiro YUNOMAE
2012-10-09 2:08 ` [PATCH 1/2] ftrace: Change unsigned long type of ring_buffer_oldest_event_ts() to u64 Yoshihiro YUNOMAE
2012-10-09 2:08 ` [PATCH 2/2] ftrace: Show raw time stamp on stats per cpu using counter or tsc mode for trace_clock Yoshihiro YUNOMAE
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