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@xxxxxxxxx>
---
lib/trace-cmd/include/private/trace-cmd-private.h | 1 +
lib/trace-cmd/trace-input.c | 9 +++++++--
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/lib/trace-cmd/include/private/trace-cmd-private.h b/lib/trace-cmd/include/private/trace-cmd-private.h
index c33d067a..fdca7494 100644
--- a/lib/trace-cmd/include/private/trace-cmd-private.h
+++ b/lib/trace-cmd/include/private/trace-cmd-private.h
@@ -134,6 +134,7 @@ 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 696e7bd8..ef2f9678 100644
--- a/lib/trace-cmd/trace-input.c
+++ b/lib/trace-cmd/trace-input.c
@@ -1287,6 +1287,10 @@ static unsigned long long timestamp_host_sync(unsigned long long ts,
static unsigned long long timestamp_calc(unsigned long long ts,
struct tracecmd_input *handle)
{
+ /* 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)
ts = timestamp_host_sync(ts, handle);
@@ -2601,7 +2605,8 @@ 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 | TRACECMD_FL_RAW_TS))
break;
offset = strtoll(buf, NULL, 0);
/* Convert from micro to nano */
@@ -2707,7 +2712,7 @@ static int handle_options(struct tracecmd_input *handle)
trace_guest_load(handle, buf, size);
break;
case TRACECMD_OPTION_TSC2NSEC:
- if (size < 16)
+ if (size < 16 || (handle->flags & TRACECMD_FL_RAW_TS))
break;
handle->tsc_calc.mult = tep_read_number(handle->pevent,
buf, 4);
--
2.30.2
|