Here is version 2 of this series to add timers and counters to Trace2.

Changes since V1:

 * I dropped the commits concerning compiler errors in Clang 11.0.0 on
   MacOS. I've sent them to the mailing list in a separate series, since
   they had nothing to do with the main topic of this series.

 * I moved the documentation changes earlier in the series to get it out of
   the way (and eliminate the need to update it later commits).

 * After a long conversation on the mailing list, I redid the two
   thread-name commits to simplify and hopefully eliminate the remaining
   misunderstandings and/or short-comings of my previous attempt and
   explanations. We now use a "const char *" for the field in the thread-ctx
   that we format and detach from a strbuf during thread-start. The goal
   here is to move away from a modifyable strbuf in the thread-ctx itself
   (to avoid giving the appearance that a caller could modify the
   thread-name at some point, when that was not intended).

The last 2 commits add the stopwatch timers and the global counters and are
unchanged from the previous version.

Jeff Hostetler (8):
  trace2: use size_t alloc,nr_open_regions in tr2tls_thread_ctx
  tr2tls: clarify TLS terminology
  api-trace2.txt: elminate section describing the public trace2 API
  trace2: rename the thread_name argument to trace2_thread_start
  trace2: improve thread-name documentation in the thread-context
  trace2: convert ctx.thread_name from strbuf to pointer
  trace2: add stopwatch timers
  trace2: add global counter mechanism

 Documentation/technical/api-trace2.txt | 190 +++++++++++++++++--------
 Makefile                               |   2 +
 t/helper/test-trace2.c                 | 187 ++++++++++++++++++++++++
 t/t0211-trace2-perf.sh                 |  95 +++++++++++++
 t/t0211/scrub_perf.perl                |   6 +
 trace2.c                               | 121 +++++++++++++++-
 trace2.h                               | 101 +++++++++++--
 trace2/tr2_ctr.c                       | 101 +++++++++++++
 trace2/tr2_ctr.h                       | 104 ++++++++++++++
 trace2/tr2_tgt.h                       |  16 +++
 trace2/tr2_tgt_event.c                 |  47 +++++-
 trace2/tr2_tgt_normal.c                |  39 +++++
 trace2/tr2_tgt_perf.c                  |  43 +++++-
 trace2/tr2_tls.c                       |  34 +++--
 trace2/tr2_tls.h                       |  55 ++++---
 trace2/tr2_tmr.c                       | 182 +++++++++++++++++++++++
 trace2/tr2_tmr.h                       | 140 ++++++++++++++++++
 17 files changed, 1361 insertions(+), 102 deletions(-)
 create mode 100644 trace2/tr2_ctr.c
 create mode 100644 trace2/tr2_ctr.h
 create mode 100644 trace2/tr2_tmr.c
 create mode 100644 trace2/tr2_tmr.h

base-commit: 3dcec76d9df911ed8321007b1d197c1a206dc164

Submitted-As: https://lore.kernel.org/git/pull.1373.v3.git.1666290489.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.1373.git.1664900407.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.1373.v2.git.1665600750.gitgitgadget@gmail.com