From: Phil Yang <phil.yang@arm.com>
To: dev@dpdk.org
Cc: thomas@monjalon.net, jerinj@marvell.com, hemant.agrawal@nxp.com,
Honnappa.Nagarahalli@arm.com, gavin.hu@arm.com,
phil.yang@arm.com, nd@arm.com
Subject: [dpdk-dev] [PATCH v1 0/3] MCS queued lock implementation
Date: Wed, 5 Jun 2019 23:58:45 +0800 [thread overview]
Message-ID: <1559750328-22377-1-git-send-email-phil.yang@arm.com> (raw)
This patch set added MCS lock library and its unit test.
The MCS lock (proposed by JOHN M. MELLOR-CRUMMEY and MICHAEL L. SCOTT) provides
scalability by spinning on a CPU/thread local variable which avoids expensive
cache bouncings. It provides fairness by maintaining a list of acquirers and
passing the lock to each CPU/thread in the order they acquired the lock.
References:
1. http://web.mit.edu/6.173/www/currentsemester/readings/R06-scalable-synchronization-1991.pdf
2. https://lwn.net/Articles/590243/
Mirco-benchmarking result:
------------------------------------------------------------------------------------------------
MCS lock | spinlock | ticket lock
------------------------------+--------------------------------+--------------------------------
Test with lock on 13 cores... | Test with lock on 14 cores... | Test with lock on 14 cores...
Core [15] Cost Time = 22426 us| Core [14] Cost Time = 47974 us| Core [14] cost time = 66761 us
Core [16] Cost Time = 22382 us| Core [15] Cost Time = 46979 us| Core [15] cost time = 66766 us
Core [17] Cost Time = 22294 us| Core [16] Cost Time = 46044 us| Core [16] cost time = 66761 us
Core [18] Cost Time = 22412 us| Core [17] Cost Time = 28793 us| Core [17] cost time = 66767 us
Core [19] Cost Time = 22407 us| Core [18] Cost Time = 48349 us| Core [18] cost time = 66758 us
Core [20] Cost Time = 22436 us| Core [19] Cost Time = 19381 us| Core [19] cost time = 66766 us
Core [21] Cost Time = 22414 us| Core [20] Cost Time = 47914 us| Core [20] cost time = 66763 us
Core [22] Cost Time = 22405 us| Core [21] Cost Time = 48333 us| Core [21] cost time = 66766 us
Core [23] Cost Time = 22435 us| Core [22] Cost Time = 38900 us| Core [22] cost time = 66749 us
Core [24] Cost Time = 22401 us| Core [23] Cost Time = 45374 us| Core [23] cost time = 66765 us
Core [25] Cost Time = 22408 us| Core [24] Cost Time = 16121 us| Core [24] cost time = 66762 us
Core [26] Cost Time = 22380 us| Core [25] Cost Time = 42731 us| Core [25] cost time = 66768 us
Core [27] Cost Time = 22395 us| Core [26] Cost Time = 29439 us| Core [26] cost time = 66768 us
| Core [27] Cost Time = 38071 us| Core [27] cost time = 66767 us
------------------------------+--------------------------------+--------------------------------
Total Cost Time = 291195 us | Total Cost Time = 544403 us | Total cost time = 934687 us
------------------------------------------------------------------------------------------------
Phil Yang (3):
eal/mcslock: add mcs queued lock implementation
eal/mcslock: use generic msc queued lock on all arch
test/mcslock: add mcs queued lock unit test
MAINTAINERS | 5 +
app/test/Makefile | 1 +
app/test/autotest_data.py | 6 +
app/test/autotest_test_funcs.py | 32 +++
app/test/meson.build | 2 +
app/test/test_mcslock.c | 248 +++++++++++++++++++++
doc/api/doxy-api-index.md | 1 +
doc/guides/rel_notes/release_19_08.rst | 6 +
lib/librte_eal/common/Makefile | 2 +-
.../common/include/arch/arm/rte_mcslock.h | 23 ++
.../common/include/arch/ppc_64/rte_mcslock.h | 19 ++
.../common/include/arch/x86/rte_mcslock.h | 19 ++
.../common/include/generic/rte_mcslock.h | 169 ++++++++++++++
lib/librte_eal/common/meson.build | 1 +
14 files changed, 533 insertions(+), 1 deletion(-)
create mode 100644 app/test/test_mcslock.c
create mode 100644 lib/librte_eal/common/include/arch/arm/rte_mcslock.h
create mode 100644 lib/librte_eal/common/include/arch/ppc_64/rte_mcslock.h
create mode 100644 lib/librte_eal/common/include/arch/x86/rte_mcslock.h
create mode 100644 lib/librte_eal/common/include/generic/rte_mcslock.h
--
2.7.4
next reply other threads:[~2019-06-05 15:59 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-05 15:58 Phil Yang [this message]
2019-06-05 15:58 ` [dpdk-dev] [PATCH v1 1/3] eal/mcslock: add mcs " Phil Yang
2019-07-05 9:56 ` [dpdk-dev] [PATCH v2 0/3] MCS " Phil Yang
2019-07-05 9:56 ` [dpdk-dev] [PATCH v2 1/3] eal/mcslock: add mcs " Phil Yang
2019-07-05 9:56 ` [dpdk-dev] [PATCH v2 2/3] eal/mcslock: use generic msc queued lock on all arch Phil Yang
2019-07-05 9:56 ` [dpdk-dev] [PATCH v2 3/3] test/mcslock: add mcs queued lock unit test Phil Yang
2019-07-05 10:27 ` [dpdk-dev] [PATCH v3 0/3] MCS queued lock implementation Phil Yang
2019-07-05 10:27 ` [dpdk-dev] [PATCH v3 1/3] eal/mcslock: add mcs " Phil Yang
2019-07-05 10:27 ` [dpdk-dev] [PATCH v3 2/3] eal/mcslock: use generic msc queued lock on all arch Phil Yang
2019-07-05 10:27 ` [dpdk-dev] [PATCH v3 3/3] test/mcslock: add mcs queued lock unit test Phil Yang
2019-07-07 21:49 ` [dpdk-dev] [PATCH v3 0/3] MCS queued lock implementation Thomas Monjalon
2019-06-05 15:58 ` [dpdk-dev] [PATCH v1 2/3] eal/mcslock: use generic msc queued lock on all arch Phil Yang
2019-06-05 15:58 ` [dpdk-dev] [PATCH v1 3/3] test/mcslock: add mcs queued lock unit test Phil Yang
2019-06-06 13:42 ` Ananyev, Konstantin
2019-06-07 5:27 ` Honnappa Nagarahalli
2019-06-10 16:36 ` Phil Yang (Arm Technology China)
2019-06-05 16:29 ` [dpdk-dev] [PATCH v1 0/3] MCS queued lock implementation David Marchand
2019-06-05 19:59 ` Honnappa Nagarahalli
2019-06-06 10:17 ` Phil Yang (Arm Technology China)
2019-06-05 16:47 ` Stephen Hemminger
2019-06-05 20:48 ` Honnappa Nagarahalli
2019-06-05 17:35 ` Thomas Monjalon
2019-07-04 20:12 ` Thomas Monjalon
2019-07-05 10:33 ` Phil Yang (Arm Technology China)
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