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Date: Mon, 22 Jun 2015 19:01:05 +0200 (CEST) From: Christophe Leroy <christophe.leroy@....fr> To: Benjamin Herrenschmidt <benh@...nel.crashing.org>, Paul Mackerras <paulus@...ba.org>, Michael Ellerman <mpe@...erman.id.au>, scottwood@...escale.com Cc: linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, Joakim Tjernlund <joakim.tjernlund@...nsmode.se> Subject: [PATCH 0/2] powerpc32: optimisation of csum_partial_copy_generic() 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in Please read the FAQ at http://www.tux.org/lkml/
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