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| author |   Mike Marciniszyn <mike.marciniszyn@qlogic.com> | 2011-09-23 13:16:49 -0400 |
|---|---|---|
| committer |   Roland Dreier <roland@purestorage.com> | 2011-10-21 09:38:56 -0700 |
| commit | d0f2faf72d51dacf5c5e8dec7dca22d0395896e2 (patch) | |
| tree | 9cdae5f02f9d17dac30c9a140123dc912d897278 /drivers/infiniband/hw/qib/qib_verbs.h | |
| parent | IB/qib: Use RCU for qpn lookup (diff) | |
| download | linux-dev-d0f2faf72d51dacf5c5e8dec7dca22d0395896e2.tar.xz linux-dev-d0f2faf72d51dacf5c5e8dec7dca22d0395896e2.zip | |
IB/qib: Precompute timeout jiffies to optimize latency
A new field is added to qib_qp called timeout_jiffies. It is
initialized upon create and modify.
The field is now used instead of a computation based on qp->timeout.
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw/qib/qib_verbs.h')
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_verbs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/qib/qib_verbs.h b/drivers/infiniband/hw/qib/qib_verbs.h index d7b6109528a4..0c19ef0c4123 100644 --- a/drivers/infiniband/hw/qib/qib_verbs.h +++ b/drivers/infiniband/hw/qib/qib_verbs.h @@ -496,6 +496,7 @@ struct qib_qp { u32 s_last; /* last completed entry */ u32 s_ssn; /* SSN of tail entry */ u32 s_lsn; /* limit sequence number (credit) */ + unsigned long timeout_jiffies; /* computed from timeout */ struct qib_swqe *s_wq; /* send work queue */ struct qib_swqe *s_wqe; struct qib_rq r_rq; /* receive work queue */ |