Added new logic for converting TSC event's timestamps to nanoseconds. This
trace clock is used by default in host-guest tracing session in combination
with KVM time sync plugin. The parameters for conversion are retrieved by
the perf kernel interface.
New option is added to "trace-cmd report" command to force displaying raw
time stamps from the trace file, without any corrections to the time stamps.
These changes depend on "Refactoring and improvements of time sync logic"
patch set.
v2 changes:
- Added new trace clock "-C tsc2nsec", which does not depend on host-guest
tracing use case.
- A few minor improvements and fixes.
Tzvetomir Stoyanov (VMware) (18):
trace-cmd: Add initial perf interface in trace-cmd library
trace-cmd: Extend trace-cmd dump subcommand to display the clock
trace-cmd: Save only the selected clock in the trace.dat file
trace-cmd: Add new trace-cmd clock tsc2nsec
trace-cmd: Add a new option in trace file metadata for tsc2nsec
conversion
trace-cmd: Save information for tsc to nanoseconds conversion in trace
file
trace-cmd: Read information for tsc to nanoseconds conversion from
trace file
trace-cmd: Save tsc2nsec clock in trace.dat file
trace-cmd: Append new options into guest trace file at the end of the
tracing session
trace-cmd: Remove unneeded multiply in events timestamp reading
trace-cmd: Perform all timestamp corrections in a single function
trace-cmd: Convert tsc timestamps to nanosecods when reading trace
data from a file
trace-cmd: Set order and priorities when applying timestamp
corrections
trace-cmd: Add a new flag to disable any timestamp corrections
trace-cmd: Add new parameter "--raw-ts" to "trace-cmd report" command
trace-cmd: Print times in TimeShift options as unsigned in trace-cmd
dump
trace-cmd: Use tsc clock for host-guest tracing, if available
trace-cmd: Get current clock for host-guest tracing session
Documentation/trace-cmd/trace-cmd-dump.1.txt | 2 +
Makefile | 6 +
lib/trace-cmd/Makefile | 3 +
.../include/private/trace-cmd-private.h | 22 ++
lib/trace-cmd/trace-input.c | 103 +++--
lib/trace-cmd/trace-output.c | 65 ++-
lib/trace-cmd/trace-perf.c | 105 +++++
lib/trace-cmd/trace-timesync.c | 1 -
tracecmd/include/trace-local.h | 7 +
tracecmd/trace-dump.c | 55 ++-
tracecmd/trace-read.c | 9 +-
tracecmd/trace-record.c | 372 +++++++++++++++---
tracecmd/trace-usage.c | 1 +
13 files changed, 649 insertions(+), 102 deletions(-)
create mode 100644 lib/trace-cmd/trace-perf.c
--
2.30.2
|