From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 0/6] Add support for pldw instruction on v7 MP cores
Date: Tue, 23 Jul 2013 12:36:23 +0100 [thread overview]
Message-ID: <1374579389-32704-1-git-send-email-will.deacon@arm.com> (raw)
Hello,
This patch series adds support for the pldw instruction implemented on
ARMv7 SMP processors. The instruction is used to implement the prefetchw
macro, which is then used around barrier-less ldrex/strex sections (i.e.
the prefetch isn't blocked either side by memory barriers) to increase
the chances of the strex succeeding initially.
On my TC2 board (A7s + A15s), I see a ~1.3% boost in hackbench scores
on top of my barriers patch series.
All feedback welcome,
Will
Will Deacon (6):
ARM: prefetch: remove redundant "cc" clobber
ARM: smp_on_up: move inline asm ALT_SMP patching macro out of
spinlock.h
ARM: prefetch: add support for prefetchw using pldw on SMP ARMv7+ CPUs
ARM: locks: prefetch the destination word for write prior to strex
ARM: atomics: prefetch the destination word for write prior to strex
ARM: bitops: prefetch the destination word for write prior to strex
arch/arm/include/asm/atomic.h | 7 +++++++
arch/arm/include/asm/processor.h | 33 +++++++++++++++++++++++++--------
arch/arm/include/asm/spinlock.h | 24 ++++++++++++------------
arch/arm/include/asm/unified.h | 4 ++++
arch/arm/lib/bitops.h | 5 +++++
5 files changed, 53 insertions(+), 20 deletions(-)
--
1.8.2.2
next reply other threads:[~2013-07-23 11:36 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-23 11:36 Will Deacon [this message]
2013-07-23 11:36 ` [PATCH 1/6] ARM: prefetch: remove redundant "cc" clobber Will Deacon
2013-07-23 19:48 ` Nicolas Pitre
2013-07-24 10:19 ` Will Deacon
2013-07-24 16:16 ` Nicolas Pitre
2013-07-24 16:35 ` Will Deacon
2013-07-24 16:58 ` Russell King - ARM Linux
2013-07-24 17:22 ` Nicolas Pitre
2013-07-23 11:36 ` [PATCH 2/6] ARM: smp_on_up: move inline asm ALT_SMP patching macro out of spinlock.h Will Deacon
2013-07-23 19:55 ` Nicolas Pitre
2013-07-23 11:36 ` [PATCH 3/6] ARM: prefetch: add support for prefetchw using pldw on SMP ARMv7+ CPUs Will Deacon
2013-07-23 20:05 ` Nicolas Pitre
2013-07-24 10:42 ` Will Deacon
2013-07-23 11:36 ` [PATCH 4/6] ARM: locks: prefetch the destination word for write prior to strex Will Deacon
2013-07-23 20:10 ` Nicolas Pitre
2013-07-24 11:18 ` Will Deacon
2013-07-25 17:31 ` Stephen Boyd
2013-07-25 17:37 ` Stephen Boyd
2013-07-25 17:45 ` Will Deacon
2013-07-25 17:48 ` Will Deacon
2013-07-25 17:55 ` Stephen Boyd
2013-07-25 18:05 ` Will Deacon
2013-07-25 18:22 ` Stephen Boyd
2013-07-25 20:24 ` Nicolas Pitre
2013-07-26 10:34 ` Will Deacon
2013-07-26 14:46 ` Nicolas Pitre
2013-07-23 11:36 ` [PATCH 5/6] ARM: atomics: " Will Deacon
2013-07-23 20:12 ` Nicolas Pitre
2013-07-23 11:36 ` [PATCH 6/6] ARM: bitops: " Will Deacon
2013-07-23 20:15 ` Nicolas Pitre
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