mbox series

[v3,0/2] Get trace buffer page size from kernel

Message ID 20211202123300.44401-1-tz.stoyanov@gmail.com (mailing list archive)
Headers show
Series Get trace buffer page size from kernel | expand

Message

Tzvetomir Stoyanov (VMware) Dec. 2, 2021, 12:32 p.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.

This patch set depends on:
 "[PATCH] libtraceevent: A new API for trace page size"
  https://lore.kernel.org/linux-trace-devel/20211126034606.190816-1-tz.stoyanov@gmail.com/
 "[PATCH v5 00/10] trace-cmd dump - v7 update" patch set.
  https://lore.kernel.org/linux-trace-devel/20211202122907.44008-1-tz.stoyanov@gmail.com/

v2 changes:
 - libtraceevent API 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.

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

 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(-)