TCP receive tested with different IOB_BUFSIZE:
| | 256B vs 1534B | 512B vs 1534B | 768B vs 1534B |
| :---------: | :-----------: | :-----------: | :-----------: |
| Non-SMP | ~85% | ~93% | ~96% |
| armv8a-SMP | ~66% | ~84% | ~92% |
| rv32/64-SMP | ~52% | ~72% | ~83% |
It seems we still get performance penalty on smaller IOBs, and may be
affected more under SMP mode. It may be caused by critical sections in
IOB operations.
Signed-off-by: Zhe Weng <wengzhe@xiaomi.com>
5597b8a9e2