diff options
| author | Mike Marciniszyn <mike.marciniszyn@intel.com> | 2017-05-04 05:14:04 -0700 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-05-04 19:31:46 -0400 |
| commit | 688f21c0be9e3ddd6c5b2241daeb9fe978c0e081 (patch) | |
| tree | 35a23885dbec15d72e12545b14913846e1d02cf2 /drivers/infiniband | |
| parent | 02d1008bcf41c7eada7882df673ae3794f7bfea8 (diff) | |
| download | lwn-688f21c0be9e3ddd6c5b2241daeb9fe978c0e081.tar.gz lwn-688f21c0be9e3ddd6c5b2241daeb9fe978c0e081.zip | |
IB/hfi1, IB/rdmavt: Move r_adefered to r_lock cache line
This field is causing excessive cache line bouncing.
There are spare bytes in the r_lock cache line so the best approach
is to make an rvt QP field and remove from the hfi1 priv field.
Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/qp.c | 4 | ||||
| -rw-r--r-- | drivers/infiniband/hw/hfi1/rc.c | 13 | ||||
| -rw-r--r-- | drivers/infiniband/hw/hfi1/verbs.h | 1 |
3 files changed, 5 insertions, 13 deletions
diff --git a/drivers/infiniband/hw/hfi1/qp.c b/drivers/infiniband/hw/hfi1/qp.c index 4573e4c9f35c..650305cc0373 100644 --- a/drivers/infiniband/hw/hfi1/qp.c +++ b/drivers/infiniband/hw/hfi1/qp.c @@ -731,9 +731,7 @@ void quiesce_qp(struct rvt_qp *qp) void notify_qp_reset(struct rvt_qp *qp) { - struct hfi1_qp_priv *priv = qp->priv; - - priv->r_adefered = 0; + qp->r_adefered = 0; clear_ahg(qp); } diff --git a/drivers/infiniband/hw/hfi1/rc.c b/drivers/infiniband/hw/hfi1/rc.c index 75a729cd0c3d..069bdaf061ab 100644 --- a/drivers/infiniband/hw/hfi1/rc.c +++ b/drivers/infiniband/hw/hfi1/rc.c @@ -727,10 +727,9 @@ void hfi1_send_rc_ack(struct hfi1_ctxtdata *rcd, struct rvt_qp *qp, struct ib_header hdr; struct ib_other_headers *ohdr; unsigned long flags; - struct hfi1_qp_priv *priv = qp->priv; /* clear the defer count */ - priv->r_adefered = 0; + qp->r_adefered = 0; /* Don't send ACK or NAK if a RDMA read or atomic is pending. */ if (qp->s_flags & RVT_S_RESP_PENDING) @@ -1604,9 +1603,7 @@ static inline void rc_defered_ack(struct hfi1_ctxtdata *rcd, static inline void rc_cancel_ack(struct rvt_qp *qp) { - struct hfi1_qp_priv *priv = qp->priv; - - priv->r_adefered = 0; + qp->r_adefered = 0; if (list_empty(&qp->rspwait)) return; list_del_init(&qp->rspwait); @@ -2314,13 +2311,11 @@ send_last: qp->r_nak_state = 0; /* Send an ACK if requested or required. */ if (psn & IB_BTH_REQ_ACK) { - struct hfi1_qp_priv *priv = qp->priv; - if (packet->numpkt == 0) { rc_cancel_ack(qp); goto send_ack; } - if (priv->r_adefered >= HFI1_PSN_CREDIT) { + if (qp->r_adefered >= HFI1_PSN_CREDIT) { rc_cancel_ack(qp); goto send_ack; } @@ -2328,7 +2323,7 @@ send_last: rc_cancel_ack(qp); goto send_ack; } - priv->r_adefered++; + qp->r_adefered++; rc_defered_ack(rcd, qp); } return; diff --git a/drivers/infiniband/hw/hfi1/verbs.h b/drivers/infiniband/hw/hfi1/verbs.h index 52ff275caf54..c0913c6c8002 100644 --- a/drivers/infiniband/hw/hfi1/verbs.h +++ b/drivers/infiniband/hw/hfi1/verbs.h @@ -125,7 +125,6 @@ struct hfi1_qp_priv { struct sdma_engine *s_sde; /* current sde */ struct send_context *s_sendcontext; /* current sendcontext */ u8 s_sc; /* SC[0..4] for next packet */ - u8 r_adefered; /* number of acks defered */ struct iowait s_iowait; struct rvt_qp *owner; }; |