[RFCv2 00/48] perf tools: Add threads to record command

[Jiri Olsa]

hi,
sending *RFC* for threads support in perf record command.

In big picture this patchset adds perf record --threads
option that allows to create threads in following modes:

1) single thread mode (current)

  $ perf record ...
  $ perf record --threads=1 ...

  - all maps are read/stored under process thread

2) mode with specific (X) number of threads

  $ perf record --threads=X ...

  - maps are spread equaly among threads

3) mode that creates thread for every monitored memory map

  $ perf record --threads ...

  - which in perf record is equal to number of CPUs, and
    it pins each thread to its map's cpu:

4) TODO - NUMA aware threads/maps separation
   ...

The perf.data stays as a single file.

v2 changes:
  - rebased to current Arnaldo's perf/core
    (also based on few fixes from my perf/core, see the branch details below)

This patchset contains lot of preparation changes to make
threaded record possible:

  - Namhyung's changes to create multiple data streams in
    perf data file, which allows having each thread data
    being stored in separate files and merged into single
    perf data after

  - Namhyung's changes to create track mmaps for auxiliary
    events

  - Namhyung's changes to search for threads/mmaps/comms
    using the time. This is needed because we have now
    multiple data streams which are processed separately,
    but they all need access to complete auxiliary events
    data (threads/mmaps/comms). That's also a reason why
    the auxiliary events are stored into separate data
    stream, which is processed before real data.

  - the rest of the code that adds threads abstraction into
    record command allows to create them and distribute maps
    among them

  - other preparational changes

The threaded monitoring currently can't monitor backward maps
and there are probably more limitations which I haven't spotted
yet.

So far I tested on laptop:
  http://people.redhat.com/~jolsa/record_threads/test-4CPU.txt

and a one bigger server:
  http://people.redhat.com/~jolsa/record_threads/test-208CPU.txt

I can see decrease in recorded LOST events, but both the benchmark
and the monitoring must be carefully configured wrt:
  - number of events (frequency)
  - size of the memory maps
  - size of events (callchains)
  - final perf.data size

It's also available in:
  git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
  perf/record_threads

thoughts? ;-) thanks
jirka


---
Jiri Olsa (30):
      perf tools: Remove perf_tool from event_op2
      perf tools: Remove perf_tool from event_op3
      perf tools: Pass struct perf_mmap into auxtrace_mmap__read* functions
      perf tools: Add struct perf_mmap arg into record__write
      perf tools: Create separate mmap for dummy tracking event
      perf tools: Make copyfile_offset global
      perf tools: Add perf_data__create_index function
      perf record: Add --index option for building index table
      perf tools: Convert dead thread list into rbtree
      perf tools: Add thread::exited flag
      perf callchain: Maintain libunwind's address space in map_groups
      perf tools: Rename perf_evlist__munmap_filtered to perf_mmap__put_filtered
      tools lib fd array: Introduce fdarray__add_clone function
      tools lib subcmd: Add OPT_INTEGER_OPTARG|_SET options
      perf tools: Move __perf_session__process_events args into struct
      perf ui progress: Fix index progress display
      perf tools: Add threads debug variable
      perf tools: Add perf_mmap__read_tail function
      perf record: Introduce struct record_thread
      perf record: Read record thread's mmaps
      perf record: Move waking into struct record
      perf record: Move samples into struct record_thread
      perf record: Move bytes_written into struct record_thread
      perf record: Add record_thread start/stop/process functions
      perf record: Wait for all threads being started
      perf record: Add --threads option
      perf record: Add --thread-stats option support
      perf record: Add maps to --thread-stats output
      perf record: Spread maps for --threads option
      perf record: Spread maps for --threads=X option

Namhyung Kim (18):
      perf tools: Use a software dummy event to track task/mmap events
      perf tools: Extend perf_evlist__mmap_ex() to use track mmap
      perf report: Skip dummy tracking event
      perf tools: Add HEADER_DATA_INDEX feature
      perf tools: Handle indexed data file properly
      perf tools: Introduce thread__comm(_str)_by_time() helpers
      perf tools: Add a test case for thread comm handling
      perf tools: Use thread__comm_by_time() when adding hist entries
      perf tools: Introduce machine__find*_thread_by_time()
      perf tools: Add a test case for timed thread handling
      perf tools: Maintain map groups list in a leader thread
      perf tools: Introduce thread__find_symbol_by_time() and friends
      perf callchain: Use thread__find_addr_location_by_time() and friends
      perf tools: Add a test case for timed map groups handling
      perf tools: Save timestamp of a map creation
      perf tools: Introduce map_groups__{insert,find}_by_time()
      perf tools: Use map_groups__find_addr_by_time()
      perf tools: Add testcase for managing maps with time

 tools/lib/api/fd/array.c                 |  17 +
 tools/lib/api/fd/array.h                 |   1 +
 tools/lib/subcmd/parse-options.c         |   2 +
 tools/lib/subcmd/parse-options.h         |   9 +
 tools/perf/Documentation/perf-record.txt |   4 +
 tools/perf/Documentation/perf.txt        |   1 +
 tools/perf/builtin-annotate.c            |   7 +-
 tools/perf/builtin-inject.c              |  32 +-
 tools/perf/builtin-record.c              | 899 +++++++++++++++++++++++++++++--
 tools/perf/builtin-report.c              |  12 +-
 tools/perf/builtin-script.c              |  38 +-
 tools/perf/builtin-stat.c                |  23 +-
 tools/perf/perf.c                        |   1 +
 tools/perf/perf.h                        |   3 +
 tools/perf/tests/Build                   |   4 +
 tools/perf/tests/builtin-test.c          |  16 +
 tools/perf/tests/dwarf-unwind.c          |   4 +-
 tools/perf/tests/hists_common.c          |   2 +-
 tools/perf/tests/hists_link.c            |   2 +-
 tools/perf/tests/tests.h                 |   4 +
 tools/perf/tests/thread-comm.c           |  48 ++
 tools/perf/tests/thread-lookup-time.c    | 181 +++++++
 tools/perf/tests/thread-map-time.c       |  90 ++++
 tools/perf/tests/thread-mg-share.c       |   7 +-
 tools/perf/tests/thread-mg-time.c        |  94 ++++
 tools/perf/ui/browsers/hists.c           |  30 +-
 tools/perf/ui/gtk/hists.c                |   3 +
 tools/perf/util/auxtrace.c               |  30 +-
 tools/perf/util/auxtrace.h               |  21 +-
 tools/perf/util/data.c                   |  64 +++
 tools/perf/util/data.h                   |   5 +
 tools/perf/util/debug.c                  |   2 +
 tools/perf/util/debug.h                  |   1 +
 tools/perf/util/dso.c                    |   2 +-
 tools/perf/util/event.c                  | 135 ++++-
 tools/perf/util/evlist.c                 |  96 +++-
 tools/perf/util/evlist.h                 |   7 +-
 tools/perf/util/evsel.h                  |  15 +
 tools/perf/util/header.c                 |  93 +++-
 tools/perf/util/header.h                 |  18 +-
 tools/perf/util/hist.c                   |   4 +-
 tools/perf/util/intel-pt.c               |   2 +-
 tools/perf/util/machine.c                | 293 ++++++++--
 tools/perf/util/machine.h                |  22 +-
 tools/perf/util/map.c                    |  79 ++-
 tools/perf/util/map.h                    |  40 +-
 tools/perf/util/mmap.c                   |   6 +-
 tools/perf/util/mmap.h                   |  33 +-
 tools/perf/util/session.c                | 178 +++---
 tools/perf/util/session.h                |   5 +-
 tools/perf/util/stat.c                   |   5 +-
 tools/perf/util/stat.h                   |   5 +-
 tools/perf/util/symbol-elf.c             |   2 +-
 tools/perf/util/symbol.c                 |   4 +-
 tools/perf/util/thread.c                 | 200 ++++++-
 tools/perf/util/thread.h                 |  27 +-
 tools/perf/util/tool.h                   |   7 +-
 tools/perf/util/unwind-libdw.c           |   6 +-
 tools/perf/util/unwind-libunwind-local.c |  39 +-
 tools/perf/util/unwind-libunwind.c       |   9 +-
 tools/perf/util/unwind.h                 |   7 +-
 tools/perf/util/util.c                   |   2 +-
 tools/perf/util/util.h                   |   2 +
 63 files changed, 2608 insertions(+), 392 deletions(-)
 create mode 100644 tools/perf/tests/thread-comm.c
 create mode 100644 tools/perf/tests/thread-lookup-time.c
 create mode 100644 tools/perf/tests/thread-map-time.c
 create mode 100644 tools/perf/tests/thread-mg-time.c