On 17.12.2020., at 09:16, Lijian Zhang
<lijian.zh...@arm.com<mailto:lijian.zh...@arm.com>> wrote:
Hi Damjan,
When I was benchmarking AVF PMD driver with L3fwd and L2-xconnect cases, not
all packets received via AVF input node ‘avf-input’ are transmitted out via AVF
output node ‘eth1-tx’.
I have tried to increase the tx-queue-size of avf interface, but it does not
help. Have checked VNET_DEVICE_CLASS_TX_FN (avf_device_class) (), but didn’t
find software bottle-neck there.
Is this a normal behavior for XL710 VF interface, and does it mean VF PCIe DMA
bandwidth in RX direction is higher than that in TX direction?
------L3fwd-------
avf-input polling 2369637 606626968
0 1.30e1 255.99
eth1-output active 2369637 606626968
0 5.56e0 255.99
eth1-tx active 2369637 442718040
0 2.02e1 186.83
ethernet-input active 2369637 606626968
0 1.26e1 255.99
ip4-input-no-checksum active 2369637 606626968
0 1.91e1 255.99
ip4-lookup active 2369637 606626968
0 2.06e1 255.99
ip4-rewrite active 2369637 606626968
0 1.85e1 255.99
------L2-xconnect -------
avf-input polling 7342184 779122436
0 2.39e1 106.12
eth1-output active 7342123 779122436
0 6.67e0 106.12
eth1-tx active 7342123 429393137
0 3.23e1 58.48
ethernet-input active 7342123 779122436
0 1.37e1 106.12
l2-input active 7342123 779122436
0 1.14e1 106.12
l2-output active 7342123 779122436
0 6.19e0 106.12
What "show error" says?
If VPP was not able to enqueue packet to tx queue, it will bunp ‘no free slots’
counter.
—
Damjan
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