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IB/hfi1: Remove unnecessary fecn and becn fields 

packet->fecn and packet->becn are calculated in the hot path
and are never used. Remove these fields as they show to be
costly in a profile. Also, remove initialization for
becn and fecn in process_ecn() as they're unconditionally
assigned in the function and ensure fecn and becn variables
use a boolean type.

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 10:46:38 -08:00 committed by Jason Gunthorpe
parent bdaf96f650
commit ca85bb1ca9
7 changed files with 24 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

@ -1440,8 +1440,6 @@ static int hfi1_setup_9B_packet(struct hfi1_packet *packet)
packet->sc = hfi1_9B_get_sc5(hdr, packet->rhf);
packet->pad = ib_bth_get_pad(packet->ohdr);
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);
@ -1508,8 +1506,6 @@ static int hfi1_setup_bypass_packet(struct hfi1_packet *packet)
packet->sl = ibp->sc_to_sl[packet->sc];
packet->pad = hfi1_16B_bth_get_pad(packet->ohdr);
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);

16
drivers/infiniband/hw/hfi1/hfi.h
View File

@ -352,8 +352,6 @@ struct hfi1_packet {
u8 sc;
u8 sl;
u8 opcode;
bool becn;
bool fecn;
bool migrated;
};
@ -1781,19 +1779,15 @@ void hfi1_process_ecn_slowpath(struct rvt_qp *qp, struct hfi1_packet *pkt,
static inline bool process_ecn(struct rvt_qp *qp, struct hfi1_packet *pkt,
bool do_cnp)
{
struct ib_other_headers *ohdr = pkt->ohdr;
u32 bth1;
bool becn = false;
bool fecn = false;
bool becn;
bool fecn;
if (pkt->etype == RHF_RCV_TYPE_BYPASS) {
fecn = hfi1_16B_get_fecn(pkt->hdr);
becn = hfi1_16B_get_becn(pkt->hdr);
} else {
bth1 = be32_to_cpu(ohdr->bth[1]);
fecn = bth1 & IB_FECN_SMASK;
becn = bth1 & IB_BECN_SMASK;
fecn = ib_bth_get_fecn(pkt->ohdr);
becn = ib_bth_get_becn(pkt->ohdr);
}
if (unlikely(fecn || becn)) {
hfi1_process_ecn_slowpath(qp, pkt, do_cnp);
@ -2419,7 +2413,7 @@ static inline void hfi1_make_ib_hdr(struct ib_header *hdr,
static inline void hfi1_make_16b_hdr(struct hfi1_16b_header *hdr,
u32 slid, u32 dlid,
u16 len, u16 pkey,
u8 becn, u8 fecn, u8 l4,
bool becn, bool fecn, u8 l4,
u8 sc)
{
u32 lrh0 = 0;

2
drivers/infiniband/hw/hfi1/rc.c
View File

@ -814,7 +814,7 @@ static inline void hfi1_make_rc_ack_16B(struct hfi1_packet *packet,
struct ib_other_headers *ohdr;
u32 bth0, bth1 = 0;
u16 len, pkey;
u8 becn = !!is_fecn;
bool becn = is_fecn;
u8 l4 = OPA_16B_L4_IB_LOCAL;
u8 extra_bytes;

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

@ -751,7 +751,7 @@ static inline void hfi1_make_ruc_header_16B(struct rvt_qp *qp,
ps->s_txreq->s_cur_size);
u32 nwords = SIZE_OF_CRC + ((ps->s_txreq->s_cur_size +
extra_bytes + SIZE_OF_LT) >> 2);
u8 becn = 0;
bool becn = false;
if (unlikely(rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH) &&
hfi1_check_mcast(rdma_ah_get_dlid(&qp->remote_ah_attr))) {
@ -789,7 +789,7 @@ static inline void hfi1_make_ruc_header_16B(struct rvt_qp *qp,
if (qp->s_flags & RVT_S_ECN) {
qp->s_flags &= ~RVT_S_ECN;
/* we recently received a FECN, so return a BECN */
becn = 1;
becn = true;
}
hfi1_make_ruc_bth(qp, ohdr, bth0, bth1, bth2);

8
drivers/infiniband/hw/hfi1/trace.c
View File

@ -138,7 +138,7 @@ static const char *parse_syndrome(u8 syndrome)
}
void hfi1_trace_parse_9b_bth(struct ib_other_headers *ohdr,
u8 *ack, u8 *becn, u8 *fecn, u8 *mig,
u8 *ack, bool *becn, bool *fecn, u8 *mig,
u8 *se, u8 *pad, u8 *opcode, u8 *tver,
u16 *pkey, u32 *psn, u32 *qpn)
{
@ -184,7 +184,7 @@ void hfi1_trace_parse_9b_hdr(struct ib_header *hdr, bool sc5,
}
void hfi1_trace_parse_16b_hdr(struct hfi1_16b_header *hdr,
u8 *age, u8 *becn, u8 *fecn,
u8 *age, bool *becn, bool *fecn,
u8 *l4, u8 *rc, u8 *sc,
u16 *entropy, u16 *len, u16 *pkey,
u32 *dlid, u32 *slid)
@ -207,7 +207,7 @@ void hfi1_trace_parse_16b_hdr(struct hfi1_16b_header *hdr,
#define LRH_16B_PRN "age:%d becn:%d fecn:%d l4:%d " \
"rc:%d sc:%d pkey:0x%.4x entropy:0x%.4x"
const char *hfi1_trace_fmt_lrh(struct trace_seq *p, bool bypass,
u8 age, u8 becn, u8 fecn, u8 l4,
u8 age, bool becn, bool fecn, u8 l4,
u8 lnh, const char *lnh_name, u8 lver,
u8 rc, u8 sc, u8 sl, u16 entropy,
u16 len, u16 pkey, u32 dlid, u32 slid)
@ -235,7 +235,7 @@ const char *hfi1_trace_fmt_lrh(struct trace_seq *p, bool bypass,
"op:0x%.2x,%s se:%d m:%d pad:%d tver:%d " \
"qpn:0x%.6x a:%d psn:0x%.8x"
const char *hfi1_trace_fmt_bth(struct trace_seq *p, bool bypass,
u8 ack, u8 becn, u8 fecn, u8 mig,
u8 ack, bool becn, bool fecn, u8 mig,
u8 se, u8 pad, u8 opcode, const char *opname,
u8 tver, u16 pkey, u32 psn, u32 qpn)
{

16
drivers/infiniband/hw/hfi1/trace_ibhdrs.h
View File

@ -101,7 +101,7 @@ u8 hfi1_trace_opa_hdr_len(struct hfi1_opa_header *opah);
u8 hfi1_trace_packet_hdr_len(struct hfi1_packet *packet);
const char *hfi1_trace_get_packet_l4_str(u8 l4);
void hfi1_trace_parse_9b_bth(struct ib_other_headers *ohdr,
u8 *ack, u8 *becn, u8 *fecn, u8 *mig,
u8 *ack, bool *becn, bool *fecn, u8 *mig,
u8 *se, u8 *pad, u8 *opcode, u8 *tver,
u16 *pkey, u32 *psn, u32 *qpn);
void hfi1_trace_parse_9b_hdr(struct ib_header *hdr, bool sc5,
@ -112,19 +112,19 @@ void hfi1_trace_parse_16b_bth(struct ib_other_headers *ohdr,
u8 *pad, u8 *se, u8 *tver,
u32 *psn, u32 *qpn);
void hfi1_trace_parse_16b_hdr(struct hfi1_16b_header *hdr,
u8 *age, u8 *becn, u8 *fecn,
u8 *age, bool *becn, bool *fecn,
u8 *l4, u8 *rc, u8 *sc,
u16 *entropy, u16 *len, u16 *pkey,
u32 *dlid, u32 *slid);
const char *hfi1_trace_fmt_lrh(struct trace_seq *p, bool bypass,
u8 age, u8 becn, u8 fecn, u8 l4,
u8 age, bool becn, bool fecn, u8 l4,
u8 lnh, const char *lnh_name, u8 lver,
u8 rc, u8 sc, u8 sl, u16 entropy,
u16 len, u16 pkey, u32 dlid, u32 slid);
const char *hfi1_trace_fmt_bth(struct trace_seq *p, bool bypass,
u8 ack, u8 becn, u8 fecn, u8 mig,
u8 ack, bool becn, bool fecn, u8 mig,
u8 se, u8 pad, u8 opcode, const char *opname,
u8 tver, u16 pkey, u32 psn, u32 qpn);
@ -148,8 +148,8 @@ DECLARE_EVENT_CLASS(hfi1_input_ibhdr_template,
__field(u8, etype)
__field(u8, ack)
__field(u8, age)
__field(u8, becn)
__field(u8, fecn)
__field(bool, becn)
__field(bool, fecn)
__field(u8, l2)
__field(u8, l4)
__field(u8, lnh)
@ -290,8 +290,8 @@ DECLARE_EVENT_CLASS(hfi1_output_ibhdr_template,
__field(u8, hdr_type)
__field(u8, ack)
__field(u8, age)
__field(u8, becn)
__field(u8, fecn)
__field(bool, becn)
__field(bool, fecn)
__field(u8, l4)
__field(u8, lnh)
__field(u8, lver)

10
include/rdma/ib_hdrs.h
View File

@ -313,16 +313,14 @@ static inline u32 ib_bth_get_qpn(struct ib_other_headers *ohdr)
return (u32)((be32_to_cpu(ohdr->bth[1])) & IB_QPN_MASK);
}
static inline u8 ib_bth_get_becn(struct ib_other_headers *ohdr)
static inline bool ib_bth_get_becn(struct ib_other_headers *ohdr)
{
return (u8)((be32_to_cpu(ohdr->bth[1]) >> IB_BECN_SHIFT) &
IB_BECN_MASK);
return (ohdr->bth[1]) & cpu_to_be32(IB_BECN_SMASK);
}
static inline u8 ib_bth_get_fecn(struct ib_other_headers *ohdr)
static inline bool ib_bth_get_fecn(struct ib_other_headers *ohdr)
{
return (u8)((be32_to_cpu(ohdr->bth[1]) >> IB_FECN_SHIFT) &
IB_FECN_MASK);
return (ohdr->bth[1]) & cpu_to_be32(IB_FECN_SMASK);
}
static inline u8 ib_bth_get_tver(struct ib_other_headers *ohdr)