[v2,0/6,POC] trace-cmd: Timetamps sync using PTP-like algorithm, relying on vsock events.

Message

Tzvetomir Stoyanov Feb. 1, 2019, 1:45 p.m. UTC

[ V2 changes: 
   Addressed Steven Rostedt comments.
   Modified timestamps sync algorithm to gain more accuracy, with the 
   help of Yordan Karadzhov and Slavomir Kaslev. ]

This patch series is a POC for timestamps sync between guest and host machines.
It implelents PTP-like algorithm, using vsock events for getting the current time.

The patch series depends on Slavomir's changes, introduced by the patch series
"Add VM kernel tracing over vsock sockets"

Tzvetomir Stoyanov (6):
  trace-cmd: Implemented new lib API: tracecmd_local_events_system()
  trace-cmd: Added support for negative time offsets in trace.dat file
  trace-cmd: Fixed logic in tracecmd_read_page_record()
  trace-cmd: Added implementation of htonll() and ntohll()
  trace-cmd: Refactored make_instances() and tracecmd_remove_instances()
  trace-cmd [POC]: Implemented timestamps synch PTP-like algorithm,
    using vsock events.

 include/trace-cmd/trace-cmd.h  |   8 +-
 lib/trace-cmd/trace-input.c    |  18 +-
 lib/trace-cmd/trace-util.c     |  99 ++++++---
 tracecmd/include/trace-local.h |   5 +
 tracecmd/include/trace-msg.h   |  10 +
 tracecmd/trace-listen.c        |   3 +
 tracecmd/trace-msg.c           | 307 +++++++++++++++++++++++++-
 tracecmd/trace-read.c          |   4 +-
 tracecmd/trace-record.c        | 381 +++++++++++++++++++++++++--------
 9 files changed, 690 insertions(+), 145 deletions(-)