From: Yury Norov <ynorov@caviumnetworks.com>
To: Will Deacon <will.deacon@arm.com>,
Peter Zijlstra <peterz@infradead.org>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Cc: Yury Norov <ynorov@caviumnetworks.com>,
Adam Wallis <awallis@codeaurora.org>,
Andrew Pinski <Andrew.Pinski@cavium.com>,
Arnd Bergmann <arnd@arndb.de>,
Catalin Marinas <catalin.marinas@arm.com>,
Ingo Molnar <mingo@redhat.com>, Jan Glauber <jglauber@cavium.com>,
Mark Rutland <mark.rutland@arm.com>,
Pan Xinhui <xinhui.pan@linux.vnet.ibm.com>
Subject: [PATCH 0/3] arm64: queued spinlocks and rw-locks
Date: Wed, 3 May 2017 17:51:38 +0300 [thread overview]
Message-ID: <20170503145141.4966-1-ynorov@caviumnetworks.com> (raw)
The patch 3 adds implementation for queued-based locking on
ARM64, and the option in kernel config to enable it. Patches
1 and 2 fix some mess in header files to apply patch 3 smoothly.
Tested on QDF2400 with huge improvements with these patches on
the torture tests, by Adam Wallis.
Tested on ThunderX, by Andrew Pinski:
120 thread (30 core - 4 thread/core) CN99xx (single socket):
benchmark Units qspinlocks vs ticket locks
sched/messaging s 73.91%
sched/pipe ops/s 104.18%
futex/hash ops/s 103.87%
futex/wake ms 71.04%
futex/wake-parallel ms 93.88%
futex/requeue ms 96.47%
futex/lock-pi ops/s 118.33%
Notice, there's the queued locks implementation for the Power PC introduced
by Pan Xinhui. He largely tested it and also found significant performance
gain. In arch part it is very similar to this patch though.
https://lwn.net/Articles/701137/
RFC: https://www.spinics.net/lists/arm-kernel/msg575575.html
v1:
- queued_spin_unlock_wait() and queued_spin_is_locked() are
re-implemented in arch part to add additional memory barriers;
- queued locks are made optional, ticket locks are enabled by default.
Jan Glauber (1):
arm64/locking: qspinlocks and qrwlocks support
Yury Norov (2):
kernel/locking: #include <asm/spinlock.h> in qrwlock.c
asm-generic: don't #include <linux/atomic.h> in qspinlock_types.h
arch/arm64/Kconfig | 24 +++++++++++++++++++
arch/arm64/include/asm/qrwlock.h | 7 ++++++
arch/arm64/include/asm/qspinlock.h | 42 +++++++++++++++++++++++++++++++++
arch/arm64/include/asm/spinlock.h | 12 ++++++++++
arch/arm64/include/asm/spinlock_types.h | 14 ++++++++---
arch/arm64/kernel/Makefile | 1 +
arch/arm64/kernel/qspinlock.c | 34 ++++++++++++++++++++++++++
include/asm-generic/qspinlock.h | 1 +
include/asm-generic/qspinlock_types.h | 8 -------
kernel/locking/qrwlock.c | 1 +
10 files changed, 133 insertions(+), 11 deletions(-)
create mode 100644 arch/arm64/include/asm/qrwlock.h
create mode 100644 arch/arm64/include/asm/qspinlock.h
create mode 100644 arch/arm64/kernel/qspinlock.c
--
2.11.0
next reply other threads:[~2017-05-03 14:52 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-03 14:51 Yury Norov [this message]
2017-05-03 14:51 ` [PATCH 1/3] kernel/locking: #include <asm/spinlock.h> in qrwlock.c Yury Norov
2017-05-03 15:05 ` Geert Uytterhoeven
2017-05-03 20:32 ` Yury Norov
2017-05-03 14:51 ` [PATCH 2/3] asm-generic: don't #include <linux/atomic.h> in qspinlock_types.h Yury Norov
2017-05-04 8:01 ` Arnd Bergmann
2017-05-03 14:51 ` [PATCH 3/3] arm64/locking: qspinlocks and qrwlocks support Yury Norov
2017-05-09 4:47 ` Boqun Feng
2017-05-09 18:48 ` Yury Norov
2017-05-09 19:37 ` Yury Norov
[not found] ` <SIXPR0199MB0604CF9C101455F7D7417FF7C5160@SIXPR0199MB0604.apcprd01.prod.exchangelabs.com>
2017-05-04 20:28 ` 答复: [PATCH 0/3] arm64: queued spinlocks and rw-locks Yury Norov
2017-05-05 11:53 ` Peter Zijlstra
2017-05-05 12:26 ` Will Deacon
2017-05-05 15:28 ` Yury Norov
2017-05-05 15:32 ` Will Deacon
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