[PATCH v6 00/47] maps/threads/dsos memory improvements and fixes

[Ian Rogers]

Modify the implementation of maps to not use an rbtree as the
container for maps, instead use a sorted array. Improve locking and
reference counting issues.

Similar to maps separate out and reimplement threads to use a hashmap
for lower memory consumption and faster look up. The fixes a
regression in memory usage where reference count checking switched to
using non-invasive tree nodes.  Reduce its default size by 32 times
and improve locking discipline. Also, fix regressions where tids had
become unordered to make `perf report --tasks` and
`perf trace --summary` output easier to read.

Better encapsulate the dsos abstraction. Remove the linked list and
rbtree used for faster iteration and log(n) lookup to a sorted array
for similar performance but half the memory usage per dso. Improve
reference counting and locking discipline, adding reference count
checking to dso.

v6:
 - Patch 1 is a parameter name fix requested by Namhyung.
 - Patches 2 to 13 split apart a macro to function callback refactor
   requested by Arnaldo.
 - Add fixes and acked-by to later patches from Namhyung.

v5 series is here:
https://lore.kernel.org/lkml/20231127220902.1315692-1-irogers@xxxxxxxxxx/

Ian Rogers (47):
  perf map: Improve map/unmap parameter names
  perf maps: Add maps__for_each_map to iterate maps holding the lock
  perf events x86: Use function to add missing lock
  perf report: Use function to add missing maps lock
  perf tests: Use function to add missing maps lock
  perf machine: Use function to add missing maps lock
  perf probe-event: Use function to add missing maps lock
  perf symbol: Use function to add missing maps lock
  perf synthetic-events: Use function to add missing maps lock
  perf thread: Use function to add missing maps lock
  perf unwind: Use function to add missing maps lock
  perf vdso: Use function to add missing maps lock
  perf maps: Reduce scope of maps__for_each_entry
  perf maps: Add remove maps function to remove a map based on callback
  perf debug: Expose debug file
  perf maps: Refactor maps__fixup_overlappings
  perf maps: Do simple merge if given map doesn't overlap
  perf maps: Rename clone to copy from
  perf maps: Add maps__load_first
  perf maps: Add find next entry to give entry after the given map
  perf maps: Reduce scope of map_rb_node and maps internals
  perf maps: Fix up overlaps during fixup_end
  perf maps: Switch from rbtree to lazily sorted array for addresses
  perf maps: Get map before returning in maps__find
  perf maps: Get map before returning in maps__find_by_name
  perf maps: Get map before returning in maps__find_next_entry
  perf maps: Hide maps internals
  perf maps: Locking tidy up of nr_maps
  perf dso: Reorder variables to save space in struct dso
  perf report: Sort child tasks by tid
  perf trace: Ignore thread hashing in summary
  perf machine: Move fprintf to for_each loop and a callback
  perf threads: Move threads to its own files
  perf threads: Switch from rbtree to hashmap
  perf threads: Reduce table size from 256 to 8
  perf dsos: Attempt to better abstract dsos internals
  perf dsos: Tidy reference counting and locking
  perf dsos: Add dsos__for_each_dso
  perf dso: Move dso functions out of dsos
  perf dsos: Switch more loops to dsos__for_each_dso
  perf dsos: Switch backing storage to array from rbtree/list
  perf dsos: Remove __dsos__addnew
  perf dsos: Remove __dsos__findnew_link_by_longname_id
  perf dsos: Switch hand code to bsearch
  perf dso: Add reference count checking and accessor functions
  perf dso: Reference counting related fixes
  perf dso: Use container_of to avoid a pointer in dso_data

 tools/perf/arch/x86/tests/dwarf-unwind.c      |    1 +
 tools/perf/arch/x86/util/event.c              |  103 +-
 tools/perf/builtin-annotate.c                 |    6 +-
 tools/perf/builtin-buildid-cache.c            |    2 +-
 tools/perf/builtin-buildid-list.c             |   18 +-
 tools/perf/builtin-inject.c                   |   96 +-
 tools/perf/builtin-kallsyms.c                 |    2 +-
 tools/perf/builtin-mem.c                      |    4 +-
 tools/perf/builtin-record.c                   |    2 +-
 tools/perf/builtin-report.c                   |  243 +--
 tools/perf/builtin-script.c                   |    8 +-
 tools/perf/builtin-top.c                      |    4 +-
 tools/perf/builtin-trace.c                    |   41 +-
 tools/perf/tests/code-reading.c               |    8 +-
 tools/perf/tests/dso-data.c                   |   67 +-
 tools/perf/tests/hists_common.c               |    6 +-
 tools/perf/tests/hists_cumulate.c             |    4 +-
 tools/perf/tests/hists_output.c               |    2 +-
 tools/perf/tests/maps.c                       |   64 +-
 tools/perf/tests/symbols.c                    |    2 +-
 tools/perf/tests/thread-maps-share.c          |    8 +-
 tools/perf/tests/vmlinux-kallsyms.c           |  181 ++-
 tools/perf/ui/browsers/annotate.c             |    6 +-
 tools/perf/ui/browsers/hists.c                |    8 +-
 tools/perf/ui/browsers/map.c                  |    4 +-
 tools/perf/util/Build                         |    1 +
 tools/perf/util/annotate.c                    |   44 +-
 tools/perf/util/auxtrace.c                    |    2 +-
 tools/perf/util/block-info.c                  |    2 +-
 tools/perf/util/bpf-event.c                   |    9 +-
 tools/perf/util/bpf_lock_contention.c         |   10 +-
 tools/perf/util/build-id.c                    |  136 +-
 tools/perf/util/build-id.h                    |    2 -
 tools/perf/util/callchain.c                   |    4 +-
 tools/perf/util/data-convert-json.c           |    2 +-
 tools/perf/util/db-export.c                   |    6 +-
 tools/perf/util/debug.c                       |   22 +-
 tools/perf/util/debug.h                       |    1 +
 tools/perf/util/dlfilter.c                    |   12 +-
 tools/perf/util/dso.c                         |  468 +++---
 tools/perf/util/dso.h                         |  544 ++++++-
 tools/perf/util/dsos.c                        |  529 ++++---
 tools/perf/util/dsos.h                        |   40 +-
 tools/perf/util/event.c                       |   12 +-
 tools/perf/util/header.c                      |    8 +-
 tools/perf/util/hist.c                        |    4 +-
 tools/perf/util/intel-pt.c                    |   22 +-
 tools/perf/util/machine.c                     |  630 +++-----
 tools/perf/util/machine.h                     |   32 +-
 tools/perf/util/map.c                         |   73 +-
 tools/perf/util/map.h                         |   16 +-
 tools/perf/util/maps.c                        | 1398 +++++++++++------
 tools/perf/util/maps.h                        |  105 +-
 tools/perf/util/probe-event.c                 |   62 +-
 tools/perf/util/rb_resort.h                   |    5 -
 .../scripting-engines/trace-event-python.c    |   21 +-
 tools/perf/util/session.c                     |   21 +
 tools/perf/util/session.h                     |    2 +
 tools/perf/util/sort.c                        |   19 +-
 tools/perf/util/srcline.c                     |   65 +-
 tools/perf/util/symbol-elf.c                  |  132 +-
 tools/perf/util/symbol.c                      |  275 ++--
 tools/perf/util/symbol_fprintf.c              |    4 +-
 tools/perf/util/synthetic-events.c            |  134 +-
 tools/perf/util/thread.c                      |   48 +-
 tools/perf/util/thread.h                      |    6 -
 tools/perf/util/threads.c                     |  186 +++
 tools/perf/util/threads.h                     |   35 +
 tools/perf/util/unwind-libunwind-local.c      |   50 +-
 tools/perf/util/unwind-libunwind.c            |    9 +-
 tools/perf/util/vdso.c                        |   89 +-
 71 files changed, 3691 insertions(+), 2496 deletions(-)
 create mode 100644 tools/perf/util/threads.c
 create mode 100644 tools/perf/util/threads.h

-- 
2.43.0.rc2.451.g8631bc7472-goog