[v2,0/2] Get trace buffer page size from kernel

Message

Tzvetomir Stoyanov (VMware) Nov. 12, 2021, 4:13 a.m. UTC

The trace buffer page size is equal to the system memory page size in
the current ftrace implementation, but this may change in the future.
The newly introduced traceevent library API should be used to get the
real trace buffer page size, bases on the information from the
"events/header_page" ftrace file.

Tzvetomir Stoyanov (VMware) (2):
  trace-cmd library: Use the real trace buffer page size
  trace-cmd library: Introduce buffer page size per instance

v2 changes:
 - A libtraceevent is renamed, use the new version.
 - Rewrote get_trace_page_size() to use libtracefs APIs.
 - Cleanups in "trace-cmd dump" output, related to buffer page size print.

This patch set depends on:
 "trace-cmd fixes and clean-ups" patch set.
 "Refactor APIs for creating output handler" patch set.
 "Refactor the logic for writing trace data in the file" patch set.
 "Trace file version 7 - sections" patch set.
 "Trace file version7 - compression" patch set.
 "trace-cmd convert" patch set.
 "trace-cmd dump - v7 update" patch set.
 [PATCH] libtraceevent: A new API for trace page size.

 lib/trace-cmd/include/trace-cmd-local.h |  4 +-
 lib/trace-cmd/trace-input.c             | 11 +++-
 lib/trace-cmd/trace-output.c            | 71 ++++++++++++++++++++-----
 tracecmd/trace-dump.c                   |  9 +++-
 4 files changed, 77 insertions(+), 18 deletions(-)