IB/hfi1: Optimize packet type comparison using 9B and bypass code paths

The packet type comparison used to find out if a packet is a bypass
packet in the hot path is an expensive operation as seen in a profile.

Determine packet's pkey and migration bit through the bypass and 9B
code paths instead.

Reviewed-by: Don Hiatt <don.hiatt@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Sebastian Sanchez
2018-02-01 10:46:23 -08:00
committad av Jason Gunthorpe
förälder f150e2736f
incheckning 6d6b8848c8
5 ändrade filer med 18 tillägg och 13 borttagningar

Visa fil

@@ -405,6 +405,11 @@ static inline void cacheless_memcpy(void *dst, void *src, size_t n)
__copy_user_nocache(dst, (void __user *)src, n, 0);
}
static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr)
{
return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ);
}
extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
extern const u8 hdr_len_by_opcode[];