net: lan966x: Stop using packing library

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When a frame is injected from CPU, it is required to create an IFH(Inter
frame header) which sits in front of the frame that is transmitted.
This IFH, contains different fields like destination port, to bypass the
analyzer, priotity, etc. Lan966x it is using packing library to set and
get the fields of this IFH. But this seems to be an expensive
operations.
If this is changed with a simpler implementation, the RX will be
improved with ~5Mbit while on the TX is a much bigger improvement as it
is required to set more fields. Below are the numbers for TX.

Before:
[  5]   0.00-10.02  sec   439 MBytes   367 Mbits/sec    0 sender

After:
[  5]   0.00-10.00  sec   578 MBytes   485 Mbits/sec    0 sender

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Horatiu Vultur 2023-03-17 16:27:13 +01:00 • committed by David S. Miller

parent ff89ac704e

commit fd7627833d

2 changed files with 50 additions and 25 deletions

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1

drivers/net/ethernet/microchip/lan966x/Kconfig

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74

drivers/net/ethernet/microchip/lan966x/lan966x_main.c

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