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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 committed by Jason Gunthorpe
parent f150e2736f
commit 6d6b8848c8
5 changed files with 18 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/infiniband/hw/hfi1/driver.c
View File

@ -1440,6 +1440,8 @@ static int hfi1_setup_9B_packet(struct hfi1_packet *packet)
packet->extra_byte = 0;
packet->fecn = ib_bth_get_fecn(packet->ohdr);
packet->becn = ib_bth_get_becn(packet->ohdr);
packet->pkey = ib_bth_get_pkey(packet->ohdr);
packet->migrated = ib_bth_is_migration(packet->ohdr);
return 0;
drop:
@ -1506,6 +1508,8 @@ static int hfi1_setup_bypass_packet(struct hfi1_packet *packet)
packet->extra_byte = SIZE_OF_LT;
packet->fecn = hfi1_16B_get_fecn(packet->hdr);
packet->becn = hfi1_16B_get_becn(packet->hdr);
packet->pkey = hfi1_16B_get_pkey(packet->hdr);
packet->migrated = opa_bth_is_migration(packet->ohdr);
if (hfi1_bypass_ingress_pkt_check(packet))
goto drop;

2
drivers/infiniband/hw/hfi1/hfi.h
View File

@ -341,6 +341,7 @@ struct hfi1_packet {
u32 slid;
u16 tlen;
s16 etail;
u16 pkey;
u8 hlen;
u8 numpkt;
u8 rsize;
@ -353,6 +354,7 @@ struct hfi1_packet {
u8 opcode;
bool becn;
bool fecn;
bool migrated;
};
/* Packet types */

15
drivers/infiniband/hw/hfi1/ruc.c
View File

@ -225,19 +225,8 @@ int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet)
u32 dlid = packet->dlid;
u32 slid = packet->slid;
u32 sl = packet->sl;
int migrated;
u32 bth0, bth1;
u16 pkey;
bth0 = be32_to_cpu(packet->ohdr->bth[0]);
bth1 = be32_to_cpu(packet->ohdr->bth[1]);
if (packet->etype == RHF_RCV_TYPE_BYPASS) {
pkey = hfi1_16B_get_pkey(packet->hdr);
migrated = bth1 & OPA_BTH_MIG_REQ;
} else {
pkey = ib_bth_get_pkey(packet->ohdr);
migrated = bth0 & IB_BTH_MIG_REQ;
}
bool migrated = packet->migrated;
u16 pkey = packet->pkey;
if (qp->s_mig_state == IB_MIG_ARMED && migrated) {
if (!packet->grh) {

5
drivers/infiniband/hw/hfi1/verbs.h
View File

@ -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[];

5
include/rdma/ib_hdrs.h
View File

@ -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 */