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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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4
include/rdma/rdma_vt.h
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@@ -220,6 +220,7 @@ struct rvt_ah {
};
struct rvt_dev_info;
struct rvt_swqe;
struct rvt_driver_provided {
/*
* The work to create port files in /sys/class Infiniband is different
@@ -240,6 +241,7 @@ struct rvt_driver_provided {
void (*qp_priv_free)(struct rvt_dev_info *rdi, struct rvt_qp *qp);
void (*notify_qp_reset)(struct rvt_qp *qp);
void (*schedule_send)(struct rvt_qp *qp);
void (*schedule_send_no_lock)(struct rvt_qp *qp);
void (*do_send)(struct rvt_qp *qp);
int (*get_pmtu_from_attr)(struct rvt_dev_info *rdi, struct rvt_qp *qp,
struct ib_qp_attr *attr);
@@ -273,7 +275,7 @@ struct rvt_driver_provided {
void (*modify_qp)(struct rvt_qp *qp, struct ib_qp_attr *attr,
int attr_mask, struct ib_udata *udata);
int (*check_send_wr)(struct rvt_qp *qp, struct ib_send_wr *wr);
int (*check_send_wqe)(struct rvt_qp *qp, struct rvt_swqe *wqe);
void (*notify_create_mad_agent)(struct rvt_dev_info *rdi, int port_idx);
void (*notify_free_mad_agent)(struct rvt_dev_info *rdi, int port_idx);