diff options
| author |   Björn Töpel <bjorn.topel@intel.com> | 2020-08-25 13:35:55 +0200 |
|---|---|---|
| committer |   Tony Nguyen <anthony.l.nguyen@intel.com> | 2020-09-14 09:45:35 -0700 |
| commit | f0064bfd969bea0d65ef20d191bea8b7494b4ec8 (patch) | |
| tree | fa2cfffc47a4074f469910ccbb4f444881759029 /drivers/net/ethernet/intel/i40e/i40e_trace.h | |
| parent | i40e, xsk: remove HW descriptor prefetch in AF_XDP path (diff) | |
| download | linux-dev-f0064bfd969bea0d65ef20d191bea8b7494b4ec8.tar.xz linux-dev-f0064bfd969bea0d65ef20d191bea8b7494b4ec8.zip | |
i40e: use 16B HW descriptors instead of 32B
The i40e NIC supports two flavors of HW descriptors, 16 and 32
byte. The latter has, obviously, room for more offloading
information. However, the only fields of the 32B HW descriptor that is
being used by the driver, is also available in the 16B descriptor.
In other words; Reading and writing 32 bytes instead of 16 byte is a
waste of bus bandwidth.
This commit starts using 16 byte descriptors instead of 32 byte
descriptors.
For AF_XDP the rx_drop benchmark was improved by 2%.
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/i40e/i40e_trace.h')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_trace.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_trace.h b/drivers/net/ethernet/intel/i40e/i40e_trace.h index 424f02077e2e..983f8b98b275 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_trace.h +++ b/drivers/net/ethernet/intel/i40e/i40e_trace.h @@ -112,7 +112,7 @@ DECLARE_EVENT_CLASS( i40e_rx_template, TP_PROTO(struct i40e_ring *ring, - union i40e_32byte_rx_desc *desc, + union i40e_16byte_rx_desc *desc, struct sk_buff *skb), TP_ARGS(ring, desc, skb), @@ -140,7 +140,7 @@ DECLARE_EVENT_CLASS( DEFINE_EVENT( i40e_rx_template, i40e_clean_rx_irq, TP_PROTO(struct i40e_ring *ring, - union i40e_32byte_rx_desc *desc, + union i40e_16byte_rx_desc *desc, struct sk_buff *skb), TP_ARGS(ring, desc, skb)); @@ -148,7 +148,7 @@ DEFINE_EVENT( DEFINE_EVENT( i40e_rx_template, i40e_clean_rx_irq_rx, TP_PROTO(struct i40e_ring *ring, - union i40e_32byte_rx_desc *desc, + union i40e_16byte_rx_desc *desc, struct sk_buff *skb), TP_ARGS(ring, desc, skb)); |