From: "Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>
To: rostedt@goodmis.org
Cc: linux-trace-devel@vger.kernel.org
Subject: [PATCH v4 09/23] trace-cmd: Read information for tsc to nanoseconds conversion from trace file
Date: Thu, 25 Mar 2021 08:40:41 +0200 [thread overview]
Message-ID: <20210325064055.539554-10-tz.stoyanov@gmail.com> (raw)
In-Reply-To: <20210325064055.539554-1-tz.stoyanov@gmail.com>
Read multiplier and shift, required for TSC clock to nanosecond
conversion from the metadata of the trace file and save them in
the tracecmd input file handler.
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
lib/trace-cmd/trace-input.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c
index 2093a3dc..ebc28f7b 100644
--- a/lib/trace-cmd/trace-input.c
+++ b/lib/trace-cmd/trace-input.c
@@ -99,6 +99,12 @@ struct host_trace_info {
struct ts_offset_sample *ts_samples;
};
+struct tsc2nsec {
+ int mult;
+ int shift;
+ unsigned long long offset;
+};
+
struct tracecmd_input {
struct tep_handle *pevent;
unsigned long file_state;
@@ -118,6 +124,8 @@ struct tracecmd_input {
bool use_pipe;
struct cpu_data *cpu_data;
long long ts_offset;
+ struct tsc2nsec tsc_calc;
+
struct host_trace_info host;
double ts2secs;
char * cpustats;
@@ -2674,6 +2682,16 @@ static int handle_options(struct tracecmd_input *handle)
case TRACECMD_OPTION_GUEST:
trace_guest_load(handle, buf, size);
break;
+ case TRACECMD_OPTION_TSC2NSEC:
+ if (size < 16)
+ break;
+ handle->tsc_calc.mult = tep_read_number(handle->pevent,
+ buf, 4);
+ handle->tsc_calc.shift = tep_read_number(handle->pevent,
+ buf + 4, 4);
+ handle->tsc_calc.offset = tep_read_number(handle->pevent,
+ buf + 8, 8);
+ break;
default:
warning("unknown option %d", option);
break;
--
2.30.2
next prev parent reply other threads:[~2021-03-25 6:42 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-25 6:40 [PATCH v4 00/23] TSC trace clock to nanosecond conversion Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 01/23] trace-cmd: Add initial perf interface in trace-cmd library Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 02/23] trace-cmd: Extend trace-cmd dump subcommand to display the clock Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 03/23] trace-cmd: Save only the selected clock in the trace.dat file Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 04/23] trace-cmd: Internal refactoring, move logic for local tep handler in its own function Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 05/23] trace-cmd: Add new local function to check if a trace clock is supported Tzvetomir Stoyanov (VMware)
2021-03-26 21:21 ` Steven Rostedt
2021-03-25 6:40 ` [PATCH v4 06/23] trace-cmd: Add new trace-cmd clock tsc2nsec Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 07/23] trace-cmd: Define a new option for tsc2nsec conversion Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 08/23] trace-cmd: Save information for tsc to nanoseconds conversion in trace file Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` Tzvetomir Stoyanov (VMware) [this message]
2021-03-25 6:40 ` [PATCH v4 10/23] trace-cmd: Save tsc2nsec clock in trace.dat file Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 11/23] trace-cmd: Append new options into guest trace file at the end of the tracing session Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 12/23] trace-cmd: Remove unneeded multiply in events timestamp reading Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 13/23] trace-cmd: Perform all timestamp corrections in a single function Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 14/23] trace-cmd: Convert tsc timestamps to nanosecods when reading trace data from a file Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 15/23] trace-cmd: Set order and priorities when applying timestamp corrections Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 16/23] trace-cmd: Add a new flag to disable any " Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 17/23] trace-cmd: Change "--nodate" option to affect "--date" option only Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 18/23] trace-cmd: Add new parameter "--raw-ts" to "trace-cmd report" command Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 19/23] trace-cmd: Print times in TimeShift options as unsigned in trace-cmd dump Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 20/23] trace-cmd: Use tsc clock for host-guest tracing, if available Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 21/23] trace-cmd: Get current clock for host-guest tracing session Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 22/23] trace-cmd: Save the trace clocks in TRACECLOCK option Tzvetomir Stoyanov (VMware)
2021-03-25 6:40 ` [PATCH v4 23/23] trace-cmd: Read at least 8 bytes trace-id option Tzvetomir Stoyanov (VMware)
2021-03-26 21:18 ` Steven Rostedt
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