From: "Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>
To: rostedt@goodmis.org
Cc: linux-trace-devel@vger.kernel.org
Subject: [PATCH 04/12] trace-cmd: Add a new option in trace file metadata for tsc2nsec conversion
Date: Mon, 15 Mar 2021 08:18:24 +0200 [thread overview]
Message-ID: <20210315061832.168495-5-tz.stoyanov@gmail.com> (raw)
In-Reply-To: <20210315061832.168495-1-tz.stoyanov@gmail.com>
A new option is added in the trace.dat file for holding the multiplier
and shift, used for converting TSC trace clock to nanoseconds.
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
.../include/private/trace-cmd-private.h | 1 +
tracecmd/trace-dump.c | 18 ++++++++++++++++++
2 files changed, 19 insertions(+)
diff --git a/lib/trace-cmd/include/private/trace-cmd-private.h b/lib/trace-cmd/include/private/trace-cmd-private.h
index 27a96c12..e2ea0dd0 100644
--- a/lib/trace-cmd/include/private/trace-cmd-private.h
+++ b/lib/trace-cmd/include/private/trace-cmd-private.h
@@ -125,6 +125,7 @@ enum {
TRACECMD_OPTION_TRACEID,
TRACECMD_OPTION_TIME_SHIFT,
TRACECMD_OPTION_GUEST,
+ TRACECMD_OPTION_TSC2NSEC,
};
enum {
diff --git a/tracecmd/trace-dump.c b/tracecmd/trace-dump.c
index 6172231e..86524d0f 100644
--- a/tracecmd/trace-dump.c
+++ b/tracecmd/trace-dump.c
@@ -481,6 +481,21 @@ out:
free(buf);
}
+void dump_option_tsc2nsec(int fd, int size)
+{
+ int mult, shift, offset;
+
+ do_print(OPTIONS, "\n\t\t[Option TSC2NSEC, %d bytes]\n", size);
+
+ if (read_file_number(fd, &mult, 4))
+ die("cannot read tsc2nsec multiplier");
+ if (read_file_number(fd, &shift, 4))
+ die("cannot read tsc2nsec shift");
+ if (read_file_number(fd, &offset, 4))
+ die("cannot read tsc2nsec offset");
+ do_print(OPTIONS, "%d %d %d [multiplier, shift, offset]\n", mult, shift, offset);
+}
+
static void dump_options(int fd)
{
unsigned short option;
@@ -540,6 +555,9 @@ static void dump_options(int fd)
case TRACECMD_OPTION_GUEST:
dump_option_guest(fd, size);
break;
+ case TRACECMD_OPTION_TSC2NSEC:
+ dump_option_tsc2nsec(fd, size);
+ break;
default:
do_print(OPTIONS, " %d %d\t[Unknown option, size - skipping]\n",
option, size);
--
2.29.2
next prev parent reply other threads:[~2021-03-15 6:19 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 6:18 [PATCH 00/12] TSC trace clock to nanosecond conversion Tzvetomir Stoyanov (VMware)
2021-03-15 6:18 ` [PATCH 01/12] trace-cmd: Add initial perf interface in trace-cmd library Tzvetomir Stoyanov (VMware)
2021-03-15 21:59 ` Steven Rostedt
2021-03-15 6:18 ` [PATCH 02/12] trace-cmd: Add logic for TSC to nanosecond conversion Tzvetomir Stoyanov (VMware)
2021-03-16 21:17 ` Steven Rostedt
2021-03-17 9:57 ` Tzvetomir Stoyanov
2021-03-17 21:49 ` Steven Rostedt
2021-03-18 3:42 ` Tzvetomir Stoyanov
2021-03-18 13:59 ` Steven Rostedt
2021-03-15 6:18 ` [PATCH 03/12] trace-cmd: Append new options into guest trace file at the end of the tracing session Tzvetomir Stoyanov (VMware)
2021-03-15 6:18 ` Tzvetomir Stoyanov (VMware) [this message]
2021-03-15 6:18 ` [PATCH 05/12] trace-cmd: Save information for tsc to nanoseconds conversion in trace file Tzvetomir Stoyanov (VMware)
2021-03-15 6:18 ` [PATCH 06/12] trace-cmd: Read information for tsc to nanoseconds conversion from " Tzvetomir Stoyanov (VMware)
2021-03-15 6:18 ` [PATCH 07/12] trace-cmd: Remove unneeded multiply in events timestamp reading Tzvetomir Stoyanov (VMware)
2021-03-15 6:18 ` [PATCH 08/12] trace-cmd: Perform all timestamp corrections in a single function Tzvetomir Stoyanov (VMware)
2021-03-15 6:18 ` [PATCH 09/12] trace-cmd: Convert tsc timestamps to nanosecods when reading trace data from a file Tzvetomir Stoyanov (VMware)
2021-03-16 21:25 ` Steven Rostedt
2021-03-15 6:18 ` [PATCH 10/12] trace-cmd: Set order and priorities when applying timestamp corrections Tzvetomir Stoyanov (VMware)
2021-03-16 21:28 ` Steven Rostedt
2021-03-15 6:18 ` [PATCH 11/12] trace-cmd: Add a new flag to disable any " Tzvetomir Stoyanov (VMware)
2021-03-15 6:18 ` [PATCH 12/12] trace-cmd: Add new parameter "--raw-ts" to "trace-cmd report" command Tzvetomir Stoyanov (VMware)
2021-03-16 21:29 ` Steven Rostedt
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