From cee2688e3cd60e0d1ab2f049e31cf11fa3f62540 Mon Sep 17 00:00:00 2001 From: yonatanc Date: Thu, 20 Apr 2017 20:55:55 +0300 Subject: IB/rxe: Offload CRC calculation when possible Use CPU ability to perform CRC calculations, by replacing direct calls to crc32_le() with crypto_shash_updata(). The overall performance gain measured with ib_send_bw tool is 10% and it was tested on "Intel CPU ES-2660 v2 @ 2.20Ghz" CPU. ib_send_bw -d rxe0 -x 1 -n 9000 -e -s $((1024 * 1024 )) -l 100 --------------------------------------------------------------------------------------------- | | bytes | iterations | BW peak[MB/sec] | BW average[MB/sec] | MsgRate[Mpps] | --------------------------------------------------------------------------------------------- | crc32_le | 1048576 | 9000 | inf | 497.60 | 0.000498 | | CRC offload | 1048576 | 9000 | inf | 546.70 | 0.000547 | --------------------------------------------------------------------------------------------- Fixes: 8700e3e7c485 ("Soft RoCE driver") Signed-off-by: Yonatan Cohen Signed-off-by: Leon Romanovsky Signed-off-by: Doug Ledford --- drivers/infiniband/sw/rxe/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/infiniband/sw/rxe/Kconfig') diff --git a/drivers/infiniband/sw/rxe/Kconfig b/drivers/infiniband/sw/rxe/Kconfig index 6332dedc11e8..320bffc980d8 100644 --- a/drivers/infiniband/sw/rxe/Kconfig +++ b/drivers/infiniband/sw/rxe/Kconfig @@ -2,6 +2,7 @@ config RDMA_RXE tristate "Software RDMA over Ethernet (RoCE) driver" depends on INET && PCI && INFINIBAND depends on NET_UDP_TUNNEL + depends on CRYPTO_CRC32 select DMA_VIRT_OPS ---help--- This driver implements the InfiniBand RDMA transport over -- cgit v1.2.3-59-g8ed1b