[Qemu-devel] [PATCH v4 0/4] qemu-thread: support --enable-debug-mutex

[Peter Xu]

v4:
- cherrypick Emilio's patch to add "-m" parameter to atomic_add-bench
  tool.
- use inline functions [Emilio]

Micro benchmark result on "taskset -c 0 atomic_add-bench -m":

|--------+---------------------+------------------------|
|        | with --enable-debug | without --enable-debug |
|--------+---------------------+------------------------|
| Before | 20 Mops/s           | 34 Mops/s              |
| After  | 18 Mops/s           | 34 Mops/s              |
|--------+---------------------+------------------------|

v3:
- note down owner for every locking operations [Emilio]
- let Windows use it too [Emilio]
- added two more patches: patch 1 & 3.

Patch 1 generalize some common hooks for qemu-thread implementation
for both POSIX and Windows.

Patch 2 introduces the new debugging facility.

Patch 3 turns on mutex debugging automatically for "--enable-debug". I
suppose most developers are with that so we naturally benefit from it.

Please review.  Thanks.

Emilio G. Cota (1):
  tests/atomic_add-bench: add -m option to use mutexes

Peter Xu (3):
  qemu-thread: introduce qemu-thread-common.h
  QemuMutex: support --enable-debug-mutex
  configure: enable debug-mutex if debug enabled

 configure                   | 11 +++++++++++
 include/qemu/thread-posix.h |  4 ++++
 include/qemu/thread-win32.h |  4 ++++
 util/qemu-thread-common.h   | 46 +++++++++++++++++++++++++++++++++++++++++++++
 tests/atomic_add-bench.c    | 19 +++++++++++++++++--
 util/qemu-thread-posix.c    | 17 +++++++----------
 util/qemu-thread-win32.c    | 15 +++++++--------
 7 files changed, 96 insertions(+), 20 deletions(-)
 create mode 100644 util/qemu-thread-common.h

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2.14.3