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

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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 <[email protected]>
Reviewed-by: Mike Marciniszyn <[email protected]>
Signed-off-by: Sebastian Sanchez <[email protected]>
Signed-off-by: Dennis Dalessandro <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>
This commit is contained in:
Sebastian Sanchez 2018-02-01 10:46:23 -08:00 • committed by Jason Gunthorpe
commit 6d6b8848c8
5 changed files with 18 additions and 13 deletions
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5
include/rdma/ib_hdrs.h
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@ -335,4 +335,9 @@ static inline bool ib_bth_is_solicited(struct ib_other_headers *ohdr)
{
return ohdr->bth[0] & cpu_to_be32(IB_BTH_SOLICITED);
}
static inline bool ib_bth_is_migration(struct ib_other_headers *ohdr)
{
return ohdr->bth[0] & cpu_to_be32(IB_BTH_MIG_REQ);
}
#endif /* IB_HDRS_H */