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| author | yonatanc <yonatanc@mellanox.com> | 2017-04-20 20:55:55 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-04-21 17:45:02 +0300 |
| commit | cee2688e3cd60e0d1ab2f049e31cf11fa3f62540 (patch) | |
| tree | b92d3d4b7dee25cf7cec3f4f1a4cbe4389d1317c /drivers/infiniband/sw/rxe/rxe.h | |
| parent | 0d38ac8a8be1c8f65a63187b60ea92dbd938c332 (diff) | |
| download | linux-cee2688e3cd60e0d1ab2f049e31cf11fa3f62540.tar.xz | |
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 <yonatanc@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/sw/rxe/rxe.h')
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe.h b/drivers/infiniband/sw/rxe/rxe.h index a696af81e4a5..ecdba2fce083 100644 --- a/drivers/infiniband/sw/rxe/rxe.h +++ b/drivers/infiniband/sw/rxe/rxe.h @@ -50,6 +50,7 @@ #include <rdma/ib_umem.h> #include <rdma/ib_cache.h> #include <rdma/ib_addr.h> +#include <crypto/hash.h> #include "rxe_net.h" #include "rxe_opcode.h" @@ -64,6 +65,25 @@ #define RXE_ROCE_V2_SPORT (0xc000) +static inline u32 rxe_crc32(struct rxe_dev *rxe, + u32 crc, void *next, size_t len) +{ + int err; + + SHASH_DESC_ON_STACK(shash, rxe->tfm); + + shash->tfm = rxe->tfm; + shash->flags = 0; + *(u32 *)shash_desc_ctx(shash) = crc; + err = crypto_shash_update(shash, next, len); + if (unlikely(err)) { + pr_warn_ratelimited("failed crc calculation, err: %d\n", err); + return crc32_le(crc, next, len); + } + + return *(u32 *)shash_desc_ctx(shash); +} + int rxe_set_mtu(struct rxe_dev *rxe, unsigned int dev_mtu); int rxe_add(struct rxe_dev *rxe, unsigned int mtu); |