[Edited Message Follows]
Hi all,
I did an experiment on interface capacity in vpp-agent and the results are as
follows:
1. af_packet: Less than 240 ( when host memory is 8g )
created by:
ip link add name veth_lan$i type veth peer name lan$i
ip link set dev lan$i up
ip link set dev veth_lan$i up
vppctl create host-interface name lan$i
If I only creat ip dev without vpp host-interface, the number is far more than
1000, why does the af_packet interface take up so much memory? Is there any way
to create more af_packet interfaces?
2. memif: Less than 255
created by:
vppctl create interface memif id $i
The limiting factor for memif is node_index in src/vlib/error.h : (
https://github.com/FDio/vpp/commit/aa682a39b76ee043f65313f23e134bf18fe7a47e#diff-957e9419019250abf89c224349060611
)
always_inline vlib_error_t
vlib_error_set (u32 node_index, u32 code)
{
ASSERT (node_index < (1 << 10));
ASSERT (code < (1 << 6));
return (node_index << 6) | code;
}
If I change node_index of error_set back to 1<<20, the number of memif
interfaces can reach 3000+. If so, What other effects?
3. tapV2: Less than 1024
created by:
vppctl create tap id $i
The limiting factor for tapV2 is TAP_MAX_INSTANCE 1024 in
src/vnet/devices/tap/tap.c (
https://github.com/FDio/vpp/commit/cbe8d65068c9c39ca6b1f7e116dac2744835f18c#diff-e37d3f4d89a66ac984f7dc3c31f9bb35
).
Why set TAP_MAX_INSTANCE to 1024? If it is changed to 2048, what other effects?-=-=-=-=-=-=-=-=-=-=-=-
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