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rtl8xxxu: Improve the A-MPDU retransmission rate with RTS/CTS protection
authorChris Chiu <chris.chiu@canonical.com>
Wed, 15 Dec 2021 08:58:19 +0000 (16:58 +0800)
committerKalle Valo <kvalo@kernel.org>
Mon, 20 Dec 2021 19:04:03 +0000 (21:04 +0200)
commitb250200e2ee4579932ba38c610cb90bef642011b
treea3e9af20ef0de893198b371539a43764f57a3125
parentc1afb26727d9e507d3e17a9890e7aaf7fc85cd55
rtl8xxxu: Improve the A-MPDU retransmission rate with RTS/CTS protection

The A-MPDU TX retransmission rate is always high (> 20%) even in a very
clean environment. However, the vendor driver retransimission rate is
< 10% in the same test bed. The difference is the vendor driver starts
the A-MPDU TXOP with initial RTS/CTS handshake which is observed in the
air capture and the TX descriptor. Since the driver does not know how
many frames will be aggregated and the estimated duration, forcing the
RTS/CTS protection for A-MPDU helps to lower the retransmission rate
from > 20% to ~12% in the same test setup with the vendor driver.

Signed-off-by: Chris Chiu <chris.chiu@canonical.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20211215085819.729345-1-chris.chiu@canonical.com
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c