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IB/rdmavt: Compress adjacent SGEs in rvt_lkey_ok()

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SGEs that are contiguous needlessly consume driver dependent TX resources.

The lkey validation logic is enhanced to compress the SGE that ends
up in the send wqe when consecutive addresses are detected.

The lkey validation API used to return 1 (success) or 0 (fail).

The return value is now an -errno, 0 (compressed), or 1 (uncompressed).  A
additional argument is added to pass the last SQE for the compression.

Loopback callers always pass a NULL to last_sge since the optimization is
of little benefit in that situation.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Brian Welty <brian.welty@intel.com>
Signed-off-by: Venkata Sandeep Dhanalakota <venkata.s.dhanalakota@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>
This commit is contained in:
Mike Marciniszyn
2017-05-12 09:20:31 -07:00
committed by Doug Ledford
parent 9039746cdf
commit 14fe13fcd3
7 changed files with 130 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
drivers/infiniband/sw/rdmavt/trace_mr.h
View File

@@ -103,6 +103,68 @@ DEFINE_EVENT(
TP_PROTO(struct rvt_mregion *mr, u16 m, u16 n, void *v, size_t len),
TP_ARGS(mr, m, n, v, len));
DECLARE_EVENT_CLASS(
rvt_sge_template,
TP_PROTO(struct rvt_sge *sge, struct ib_sge *isge),
TP_ARGS(sge, isge),
TP_STRUCT__entry(
RDI_DEV_ENTRY(ib_to_rvt(sge->mr->pd->device))
__field(struct rvt_mregion *, mr)
__field(struct rvt_sge *, sge)
__field(struct ib_sge *, isge)
__field(void *, vaddr)
__field(u64, ivaddr)
__field(u32, lkey)
__field(u32, sge_length)
__field(u32, length)
__field(u32, ilength)
__field(int, user)
__field(u16, m)
__field(u16, n)
),
TP_fast_assign(
RDI_DEV_ASSIGN(ib_to_rvt(sge->mr->pd->device));
__entry->mr = sge->mr;
__entry->sge = sge;
__entry->isge = isge;
__entry->vaddr = sge->vaddr;
__entry->ivaddr = isge->addr;
__entry->lkey = sge->mr->lkey;
__entry->sge_length = sge->sge_length;
__entry->length = sge->length;
__entry->ilength = isge->length;
__entry->m = sge->m;
__entry->n = sge->m;
__entry->user = ibpd_to_rvtpd(sge->mr->pd)->user;
),
TP_printk(
"[%s] mr %p sge %p isge %p vaddr %p ivaddr %llx lkey %x sge_length %u length %u ilength %u m %u n %u user %u",
__get_str(dev),
__entry->mr,
__entry->sge,
__entry->isge,
__entry->vaddr,
__entry->ivaddr,
__entry->lkey,
__entry->sge_length,
__entry->length,
__entry->ilength,
__entry->m,
__entry->n,
__entry->user
)
);
DEFINE_EVENT(
rvt_sge_template, rvt_sge_adjacent,
TP_PROTO(struct rvt_sge *sge, struct ib_sge *isge),
TP_ARGS(sge, isge));
DEFINE_EVENT(
rvt_sge_template, rvt_sge_new,
TP_PROTO(struct rvt_sge *sge, struct ib_sge *isge),
TP_ARGS(sge, isge));
#endif /* __RVT_TRACE_MR_H */
#undef TRACE_INCLUDE_PATH