diff options
| author | Hoang-Nam Nguyen <hnguyen@de.ibm.com> | 2007-07-09 15:33:52 +0200 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2007-07-09 20:12:27 -0700 |
| commit | f72d2f081453d8b1ea36e47478c3463042746ddc (patch) | |
| tree | add8200b720656a1dc36f165f5e8872e5db30633 /drivers/infiniband | |
| parent | 8705ce5b90118be93eb8b0ed6f49ca5ff377df24 (diff) | |
| download | linux-f72d2f081453d8b1ea36e47478c3463042746ddc.tar.bz2 | |
IB/ehca: Improve latency by unlocking after triggering the hardware
Kick the hardware before unlocking the send/receive queue to overlap
processing a little more.
Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/ehca/ehca_reqs.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/ehca/ehca_reqs.c b/drivers/infiniband/hw/ehca/ehca_reqs.c index fd3ba22467e8..61da65e6e5e0 100644 --- a/drivers/infiniband/hw/ehca/ehca_reqs.c +++ b/drivers/infiniband/hw/ehca/ehca_reqs.c @@ -407,10 +407,9 @@ int ehca_post_send(struct ib_qp *qp, } /* eof for cur_send_wr */ post_send_exit0: - /* UNLOCK the QUEUE */ - spin_unlock_irqrestore(&my_qp->spinlock_s, flags); iosync(); /* serialize GAL register access */ hipz_update_sqa(my_qp, wqe_cnt); + spin_unlock_irqrestore(&my_qp->spinlock_s, flags); return ret; } @@ -473,9 +472,9 @@ static int internal_post_recv(struct ehca_qp *my_qp, } /* eof for cur_recv_wr */ post_recv_exit0: - spin_unlock_irqrestore(&my_qp->spinlock_r, flags); iosync(); /* serialize GAL register access */ hipz_update_rqa(my_qp, wqe_cnt); + spin_unlock_irqrestore(&my_qp->spinlock_r, flags); return ret; } |