diff options
| author | Harish Chegondi <harish.chegondi@intel.com> | 2016-09-25 07:42:01 -0700 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2016-10-02 08:42:15 -0400 |
| commit | e8a70af286bea28feb4785efb5c0b9229e67e008 (patch) | |
| tree | f899bb954910e9580f4f38406ffdf4755f9d6b10 | |
| parent | 50921be0c729a2ef4f1011ad2d228f49644e4269 (diff) | |
IB/hfi1: Adjust hardware buffering parameter
It was determined that 0x880 is a better value for hardware buffering,
use it.
Reviewed-by: Dean Luick <dean.luick@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
| -rw-r--r-- | drivers/infiniband/hw/hfi1/chip.c | 4 | ||||
| -rw-r--r-- | drivers/infiniband/hw/hfi1/chip.h | 2 |
2 files changed, 3 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c index 26c5ee5c8a2c..88394cd5f8f2 100644 --- a/drivers/infiniband/hw/hfi1/chip.c +++ b/drivers/infiniband/hw/hfi1/chip.c @@ -13385,9 +13385,9 @@ static void init_rbufs(struct hfi1_devdata *dd) /* * Give up after 1ms - maximum wait time. * - * RBuf size is 148KiB. Slowest possible is PCIe Gen1 x1 at + * RBuf size is 136KiB. Slowest possible is PCIe Gen1 x1 at * 250MB/s bandwidth. Lower rate to 66% for overhead to get: - * 148 KB / (66% * 250MB/s) = 920us + * 136 KB / (66% * 250MB/s) = 844us */ if (count++ > 500) { dd_dev_err(dd, diff --git a/drivers/infiniband/hw/hfi1/chip.h b/drivers/infiniband/hw/hfi1/chip.h index 92f2485cfe56..92345259a8f4 100644 --- a/drivers/infiniband/hw/hfi1/chip.h +++ b/drivers/infiniband/hw/hfi1/chip.h @@ -82,7 +82,7 @@ */ #define CM_VAU 3 /* HFI link credit count, AKA receive buffer depth (RBUF_DEPTH) */ -#define CM_GLOBAL_CREDITS 0x940 +#define CM_GLOBAL_CREDITS 0x880 /* Number of PKey entries in the HW */ #define MAX_PKEY_VALUES 16 |