diff options
| author | Mike Marciniszyn <mike.marciniszyn@intel.com> | 2019-02-26 08:46:16 -0800 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-03-26 09:33:21 -0300 |
| commit | 270a9833b2697d455f6ae12669b8220d3ea48f18 (patch) | |
| tree | 04e1dc0662bd7f1835797ff4633a066247a3a3c8 /drivers/infiniband/hw/hfi1/qp.c | |
| parent | 19b1a294b0b3f4e8080584cd560fc058f12123fb (diff) | |
IB/hfi1: Add running average for adaptive pio
The adaptive PIO implementation only considers the current packet size
when deciding between SDMA and pio for a packet.
This causes credit return forces if small and large packets are
interleaved.
Add a running average to avoid costly credit forces so that a large
sequence of small packets is required to go below the threshold that
chooses pio.
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/hw/hfi1/qp.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/qp.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/qp.c b/drivers/infiniband/hw/hfi1/qp.c index 9b643c2409cf..1390172b488e 100644 --- a/drivers/infiniband/hw/hfi1/qp.c +++ b/drivers/infiniband/hw/hfi1/qp.c @@ -742,6 +742,8 @@ void *qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp) iowait_wakeup, iowait_sdma_drained, hfi1_init_priority); + /* Init to a value to start the running average correctly */ + priv->s_running_pkt_size = piothreshold / 2; return priv; } |