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From: "Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>
To: rostedt@goodmis.org
Cc: linux-trace-devel@vger.kernel.org
Subject: [PATCH 11/12] trace-cmd: Add a new flag to disable any timestamp corrections
Date: Mon, 15 Mar 2021 08:18:31 +0200	[thread overview]
Message-ID: <20210315061832.168495-12-tz.stoyanov@gmail.com> (raw)
In-Reply-To: <20210315061832.168495-1-tz.stoyanov@gmail.com>

A new flag is added in the trace-cmd library for controlling events
timestamp corrections while reading a trace file. If the flag is set,
all timestamps are displayed as-is from the trace file.
   TRACECMD_FL_RAW_TS
The flag can be modified with these APIs:
  tracecmd_set_flag()
  tracecmd_clear_flag()

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 lib/trace-cmd/include/private/trace-cmd-private.h |  1 +
 lib/trace-cmd/trace-input.c                       | 12 ++++++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/lib/trace-cmd/include/private/trace-cmd-private.h b/lib/trace-cmd/include/private/trace-cmd-private.h
index e2ea0dd0..98616c76 100644
--- a/lib/trace-cmd/include/private/trace-cmd-private.h
+++ b/lib/trace-cmd/include/private/trace-cmd-private.h
@@ -132,6 +132,7 @@ enum {
 	TRACECMD_FL_IGNORE_DATE		= (1 << 0),
 	TRACECMD_FL_BUFFER_INSTANCE	= (1 << 1),
 	TRACECMD_FL_IN_USECS		= (1 << 2),
+	TRACECMD_FL_RAW_TS		= (1 << 3),
 };
 
 struct tracecmd_ftrace {
diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c
index 1cffa0f5..b53c1932 100644
--- a/lib/trace-cmd/trace-input.c
+++ b/lib/trace-cmd/trace-input.c
@@ -1288,6 +1288,9 @@ static unsigned long long timestamp_calc(unsigned long long ts,
 {
 	unsigned long long t = ts;
 
+	/* do not modify raw timestamps */
+	if (handle->flags & TRACECMD_FL_RAW_TS)
+		return ts;
 
 	/* Guest trace file, sync with host timestamps */
 	if (handle->host.sync_enable)
@@ -2603,7 +2606,8 @@ static int handle_options(struct tracecmd_input *handle)
 			 * gtod. It is stored as ASCII with '0x'
 			 * appended.
 			 */
-			if (handle->flags & TRACECMD_FL_IGNORE_DATE)
+			if ((handle->flags & TRACECMD_FL_IGNORE_DATE) ||
+			    (handle->flags & TRACECMD_FL_RAW_TS))
 				break;
 			offset = strtoll(buf, NULL, 0);
 			/* Convert from micro to nano */
@@ -2615,7 +2619,7 @@ static int handle_options(struct tracecmd_input *handle)
 			 * Similar to date option, but just adds an
 			 * offset to the timestamp.
 			 */
-			if (handle->flags & TRACECMD_FL_IGNORE_DATE)
+			if (handle->flags & TRACECMD_FL_RAW_TS)
 				break;
 			offset = strtoll(buf, NULL, 0);
 			handle->ts_offset += offset;
@@ -2630,7 +2634,7 @@ static int handle_options(struct tracecmd_input *handle)
 			 * long long array of size [count] of timestamp offsets.
 			 * long long array of size [count] of timestamp scaling ratios.*
 			 */
-			if (size < 16 || handle->flags & TRACECMD_FL_IGNORE_DATE)
+			if (size < 16 || (handle->flags & TRACECMD_FL_RAW_TS))
 				break;
 			handle->host.peer_trace_id = tep_read_number(handle->pevent,
 								     buf, 8);
@@ -2709,7 +2713,7 @@ static int handle_options(struct tracecmd_input *handle)
 			trace_guest_load(handle, buf, size);
 			break;
 		case TRACECMD_OPTION_TSC2NSEC:
-			if (size != 12)
+			if (size != 12 || (handle->flags & TRACECMD_FL_RAW_TS))
 				break;
 			handle->tsc_calc.mult = tep_read_number(handle->pevent,
 								buf, 4);
-- 
2.29.2


  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 ` [PATCH 04/12] trace-cmd: Add a new option in trace file metadata for tsc2nsec conversion Tzvetomir Stoyanov (VMware)
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 ` Tzvetomir Stoyanov (VMware) [this message]
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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