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| author |   Intiyaz Basha <intiyaz.basha@cavium.com> | 2017-10-26 16:18:20 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-10-28 00:35:23 +0900 |
| commit | c859e21a35ce5604dde0b618169680aa3c7e3bdb (patch) | |
| tree | 8361ee7294804a95c28f7b386c03073901fa1146 /drivers/net/ethernet/cavium/liquidio/octeon_config.h | |
| parent | Merge branch 'ibmvnic-Tunable-parameter-support' (diff) | |
| download | linux-dev-c859e21a35ce5604dde0b618169680aa3c7e3bdb.tar.xz linux-dev-c859e21a35ce5604dde0b618169680aa3c7e3bdb.zip | |
liquidio: xmit_more support
Defer ringing the Tx doorbell if skb->xmit_more is set unless the Tx queue
is full or stopped. To keep latency low, use a deferral limit of 8
packets. We chose 8 because Octeon can fetch at most 8 packets in a single
PCI read, and our tests show that 8 results in low latency.
Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Satanand Burla <satananda.burla@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cavium/liquidio/octeon_config.h')
| -rw-r--r-- | drivers/net/ethernet/cavium/liquidio/octeon_config.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_config.h b/drivers/net/ethernet/cavium/liquidio/octeon_config.h index 63bd9c94e547..ceac74388e09 100644 --- a/drivers/net/ethernet/cavium/liquidio/octeon_config.h +++ b/drivers/net/ethernet/cavium/liquidio/octeon_config.h @@ -37,6 +37,8 @@ #define MAX_OCTEON_LINKS MAX_OCTEON_NICIF #define MAX_OCTEON_MULTICAST_ADDR 32 +#define MAX_OCTEON_FILL_COUNT 8 + /* CN6xxx IQ configuration macros */ #define CN6XXX_MAX_INPUT_QUEUES 32 #define CN6XXX_MAX_IQ_DESCRIPTORS 2048 |