From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
scottwood@freescale.com
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
Joakim Tjernlund <joakim.tjernlund@transmode.se>
Subject: [PATCH 0/2] powerpc32: optimisation of csum_partial_copy_generic()
Date: Mon, 22 Jun 2015 19:01:05 +0200 (CEST) [thread overview]
Message-ID: <cover.1434978970.git.christophe.leroy@c-s.fr> (raw)
This patch optimises csum_partial_copy_generic() by making use of cache
instructions (dcbt/dcbz) just like copy_tofrom_user() does
On a TCP benchmark using socklib on the loopback interface on which checksum
offload and scatter/gather have been deactivated, we get about 20% performance
increase.
Christophe Leroy (2):
powerpc32: checksum_wrappers_64 becomes checksum_wrappers
powerpc32: rewrite of csum_partial_copy_generic based of copy_tofrom_user
arch/powerpc/include/asm/checksum.h | 9 -
arch/powerpc/lib/Makefile | 3 +-
arch/powerpc/lib/checksum_32.S | 320 +++++++++++++++++++++-----------
arch/powerpc/lib/checksum_wrappers.c | 102 ++++++++++
arch/powerpc/lib/checksum_wrappers_64.c | 102 ----------
5 files changed, 312 insertions(+), 224 deletions(-)
create mode 100644 arch/powerpc/lib/checksum_wrappers.c
delete mode 100644 arch/powerpc/lib/checksum_wrappers_64.c
--
2.1.0
next reply other threads:[~2015-06-22 17:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-22 17:01 Christophe Leroy [this message]
2015-06-22 17:01 ` [PATCH 1/2] powerpc32: checksum_wrappers_64 becomes checksum_wrappers Christophe Leroy
2015-06-23 0:31 ` Scott Wood
2015-06-22 17:01 ` [PATCH 2/2] powerpc32: rewrite of csum_partial_copy_generic based of copy_tofrom_user Christophe Leroy
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