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IB/qib, staging/rdma/hfi1: add s_hlock for use in post send

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This patch adds an additional lock to reduce contention on the s_lock.

This lock is used in post_send() so that the post_send is not
serialized with the send engine and other send related processing.

To do this the s_next_psn is now maintained on post_send() while
post_send() related fields are moved to a new cache line.  There is
an s_avail maintained for the post_send() to mitigate trading cache
lines with the send engine.  The lock is released/acquired around
releasing the just built packet to the egress mechanism.

Reviewed-by: Jubin John <jubin.john@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Mike Marciniszyn
2016-02-14 12:10:04 -08:00
committed by Doug Ledford
parent 20f333b613
commit 46a80d62e6
18 changed files with 320 additions and 222 deletions
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6
drivers/infiniband/hw/qib/qib_verbs.h
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@@ -298,9 +298,7 @@ static inline int qib_send_ok(struct rvt_qp *qp)
!(qp->s_flags & RVT_S_ANY_WAIT_SEND));
}
/*
* This must be called with s_lock held.
*/
void _qib_schedule_send(struct rvt_qp *qp);
void qib_schedule_send(struct rvt_qp *qp);
static inline int qib_pkey_ok(u16 pkey1, u16 pkey2)
@@ -392,6 +390,8 @@ void qib_rc_rcv(struct qib_ctxtdata *rcd, struct qib_ib_header *hdr,
int qib_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
int qib_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe);
struct ib_ah *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid);
void qib_rc_rnr_retry(unsigned long arg);