[dpdk-dev] [PATCH v1 0/2] reimplement rwlock and add relevant perf test case

[Joyce Kong]

v1: reimplement rwlock with __atomic builtins, and add a rwlock perf test
    on all available cores to benchmark the improvement.

We tested the patches on three arm64 platforms, ThundeX2 gained 20% performance,
Qualcomm gained 36% and the 4-Cortex-A72 Marvell MACCHIATObin gained 19.6%.
Below is the detailed test result on ThunderX2:

*** rwlock_autotest without __atomic builtins ***
Rwlock Perf Test on 128 cores...
Core [0] count = 281
Core [1] count = 252
Core [2] count = 290
Core [3] count = 259
Core [4] count = 287
...
Core [209] count = 3
Core [210] count = 31
Core [211] count = 120
Total count = 18537

*** rwlock_autotest with __atomic builtins ***
Rwlock Perf Test on 128 cores...
Core [0] count = 346
Core [1] count = 355
Core [2] count = 259
Core [3] count = 285
Core [4] count = 320
...
Core [209] count = 2
Core [210] count = 23
Core [211] count = 63
Total count = 22194

Gavin Hu (1):
  rwlock: reimplement with __atomic builtins

Joyce Kong (1):
  test/rwlock: add perf test case

 lib/librte_eal/common/include/generic/rte_rwlock.h | 16 ++---
 test/test/test_rwlock.c                            | 71 ++++++++++++++++++++++
 2 files changed, 79 insertions(+), 8 deletions(-)

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2.7.4