[Tarantool-patches] [PATCH luajit v3 0/4] memprof: group allocations on traces by trace number

[Mikhail Shishatskiy]

New patch series with Sergey's comments in mind.

Changes in v3:
  - Changed comments as per review;
  - Added trace address dump to avoid collisions;
  - Added humanize.describe_location function (see commit
    message);
  - Separated memprof test into subtests to be able to skip
    JIT-related tests on FreeBSD;
  - Adjusted memprof test payload to lock in the behavior 
    (see patch message).

Benchmark update:

| ---------------------------------------------------------- |
|                     JIT-off, memprof-on                    |
| ---------------------------------------------------------- |
|       BEFORE       |     AFTER, v2     |     AFTER, v3     |
| ------------------ | ----------------- | ----------------- |
| 4.8196 (0.0194)    | +0.0170 (0.0291)  | -0.0801 (0.0350)  |
| ---------------------------------------------------------- |
|                     JIT-on, memprof-on                     |
| ---------------------------------------------------------- |
|       BEFORE       |     AFTER, v2     |     AFTER, v3     |
| ------------------ | ----------------- | ----------------- |
| 3.1243 (0.0770)    | +0.1470 (0.0320)  | +0.1976 (0.0341)  |
| -----------------------------------------------------------|

Issue: https://github.com/tarantool/tarantool/issues/5814
Luajit branch: https://github.com/tarantool/luajit/tree/shishqa/gh-5814-group-allocations-on-trace-by-trace-number
tarantool branch: https://github.com/tarantool/tarantool/tree/shishqa/gh-5814-group-allocations-on-trace-by-trace-number

 src/Makefile.dep.original                     |   2 +-
 src/lj_debug.c                                |   2 +-
 src/lj_debug.h                                |   2 +-
 src/lj_memprof.c                              |  75 +++++-
 src/lj_memprof.h                              |  22 +-
 .../misclib-memprof-lapi.test.lua             | 252 ++++++++++++------
 tools/memprof/humanize.lua                    |  21 +-
 tools/memprof/parse.lua                       |  22 +-
 tools/memprof/process.lua                     |   6 +-
 tools/utils/symtab.lua                        |  45 +++-
 10 files changed, 331 insertions(+), 118 deletions(-)

-- 
2.32.0