From: Steven Rostedt <rostedt@goodmis.org>
To: "Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Subject: Re: [PATCH v2 03/18] trace-cmd: Save only the selected clock in the trace.dat file
Date: Tue, 23 Mar 2021 20:52:05 -0400 [thread overview]
Message-ID: <20210323205205.192e62ae@oasis.local.home> (raw)
In-Reply-To: <20210322095945.259300-4-tz.stoyanov@gmail.com>
On Mon, 22 Mar 2021 11:59:30 +0200
"Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com> wrote:
> Trace clock, used for curent trace sessions is saved in the trace.dat
> file. This information is used when displaying timestamps of the events.
> However, only the selected clock is needed.
> A new API is added:
> tracecmd_set_out_clock();
> that can be used to set the trace clock on the output handle.
>
There's no reason not to have the other clocks in the file. I would
rather keep them as it doesn't hurt to have them right?
The reason for keeping them is when a customer sends you a trace.dat
file (from commands you ask them to run), you can use the trace.dat
file to see what other clocks they have configured in case you want to
have them try another clock in their next recording.
Extra data about the system the trace.dat file was run on is always a
plus.
-- Steve
next prev parent reply other threads:[~2021-03-24 0:53 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-22 9:59 [PATCH v2 00/18] TSC trace clock to nanosecond conversion Tzvetomir Stoyanov (VMware)
2021-03-22 9:59 ` [PATCH v2 01/18] trace-cmd: Add initial perf interface in trace-cmd library Tzvetomir Stoyanov (VMware)
2021-03-24 0:47 ` Steven Rostedt
2021-03-22 9:59 ` [PATCH v2 02/18] trace-cmd: Extend trace-cmd dump subcommand to display the clock Tzvetomir Stoyanov (VMware)
2021-03-22 9:59 ` [PATCH v2 03/18] trace-cmd: Save only the selected clock in the trace.dat file Tzvetomir Stoyanov (VMware)
2021-03-24 0:52 ` Steven Rostedt [this message]
2021-03-24 9:10 ` Tzvetomir Stoyanov
2021-03-22 9:59 ` [PATCH v2 04/18] trace-cmd: Add new trace-cmd clock tsc2nsec Tzvetomir Stoyanov (VMware)
2021-03-24 1:24 ` Steven Rostedt
2021-03-22 9:59 ` [PATCH v2 05/18] trace-cmd: Add a new option in trace file metadata for tsc2nsec conversion Tzvetomir Stoyanov (VMware)
2021-03-24 1:26 ` Steven Rostedt
2021-03-22 9:59 ` [PATCH v2 06/18] trace-cmd: Save information for tsc to nanoseconds conversion in trace file Tzvetomir Stoyanov (VMware)
2021-03-22 9:59 ` [PATCH v2 07/18] trace-cmd: Read information for tsc to nanoseconds conversion from " Tzvetomir Stoyanov (VMware)
2021-03-22 9:59 ` [PATCH v2 08/18] trace-cmd: Save tsc2nsec clock in trace.dat file Tzvetomir Stoyanov (VMware)
2021-03-24 1:33 ` Steven Rostedt
2021-03-24 4:58 ` Tzvetomir Stoyanov
2021-03-22 9:59 ` [PATCH v2 09/18] trace-cmd: Append new options into guest trace file at the end of the tracing session Tzvetomir Stoyanov (VMware)
2021-03-22 9:59 ` [PATCH v2 10/18] trace-cmd: Remove unneeded multiply in events timestamp reading Tzvetomir Stoyanov (VMware)
2021-03-22 9:59 ` [PATCH v2 11/18] trace-cmd: Perform all timestamp corrections in a single function Tzvetomir Stoyanov (VMware)
2021-03-24 1:38 ` Steven Rostedt
2021-03-22 9:59 ` [PATCH v2 12/18] trace-cmd: Convert tsc timestamps to nanosecods when reading trace data from a file Tzvetomir Stoyanov (VMware)
2021-03-24 1:41 ` Steven Rostedt
2021-03-22 9:59 ` [PATCH v2 13/18] trace-cmd: Set order and priorities when applying timestamp corrections Tzvetomir Stoyanov (VMware)
2021-03-24 1:44 ` Steven Rostedt
2021-03-22 9:59 ` [PATCH v2 14/18] trace-cmd: Add a new flag to disable any " Tzvetomir Stoyanov (VMware)
2021-03-24 1:49 ` Steven Rostedt
2021-03-24 12:10 ` Tzvetomir Stoyanov
2021-03-24 12:15 ` Steven Rostedt
2021-03-22 9:59 ` [PATCH v2 15/18] trace-cmd: Add new parameter "--raw-ts" to "trace-cmd report" command Tzvetomir Stoyanov (VMware)
2021-03-22 9:59 ` [PATCH v2 16/18] trace-cmd: Print times in TimeShift options as unsigned in trace-cmd dump Tzvetomir Stoyanov (VMware)
2021-03-22 9:59 ` [PATCH v2 17/18] trace-cmd: Use tsc clock for host-guest tracing, if available Tzvetomir Stoyanov (VMware)
2021-03-22 9:59 ` [PATCH v2 18/18] trace-cmd: Get current clock for host-guest tracing session Tzvetomir Stoyanov (VMware)
2021-03-24 1:52 ` Steven Rostedt
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