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IB/rxe: Offload CRC calculation when possible

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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: 8700e3e7c4 ("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>
This commit is contained in:
yonatanc
2017-04-20 20:55:55 +03:00
committed by Doug Ledford
parent 0d38ac8a8b
commit cee2688e3c
9 changed files with 44 additions and 9 deletions
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1
drivers/infiniband/sw/rxe/rxe_verbs.h
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@@ -406,6 +406,7 @@ struct rxe_dev {
struct rxe_port port;
struct list_head list;
struct crypto_shash *tfm;
};
static inline void rxe_counter_inc(struct rxe_dev *rxe, enum rxe_counters cnt)