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sdk_dpaa: ceetm: lower the default congestion thresholds 

The congestion thresholds need to be set in such a way that:
    a) the threshold is high enough so that frames aren't dropped
    unnecessarily
    b) the threshold is low enough so that the latency isn't too big

The current thresholds are set too high. In forwarding scenarios, the
latency is too large and frames are dropped on ingress due to a lack of
buffers.

Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
5.4-rM2-2.2.x-imx-squashed
Camelia Groza 2018-10-02 16:49:28 +03:00 committed by Dong Aisheng
parent f63917b62f
commit 299edfcd06
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/freescale/sdk_dpaa/Kconfig
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@ -24,7 +24,7 @@ config FSL_DPAA_CEETM_CCS_THRESHOLD_1G
hex "CEETM egress congestion threshold on 1G ports"
depends on FSL_DPAA_CEETM
range 0x1000 0x10000000
default "0x000a0000"
default "0x00005000"
help
The size in bytes of the CEETM egress Class Congestion State threshold on 1G ports.
The threshold needs to be configured keeping in mind the following factors:
@ -38,7 +38,7 @@ config FSL_DPAA_CEETM_CCS_THRESHOLD_10G
hex "CEETM egress congestion threshold on 10G ports"
depends on FSL_DPAA_CEETM
range 0x1000 0x20000000
default "0x00640000"
default "0x00032000"
help
The size in bytes of the CEETM egress Class Congestion State threshold on 10G ports.
See FSL_DPAA_CEETM_CCS_THRESHOLD_1G for details.