pcap file generation

[QiongwenXu]

For the given original pcap file, writer a script to generate the pcap files for three approaches (shared-state, flow affinity, shared-nothing)

Modifications for all approaches:
Modify dst mac: ensure that the packets can be sent to dut
Add padding: higher tx rate

Shared state:

• add padding, modify dst mac
• modify src mac for RSS
• -> (# of cores) pcap files

Flow affinity

• add padding, modify dst mac -> 1 pcap file
• (RSS) Some benchmark needs additional processing: e.g., set dst ip the same for ddos mitigator flow affinity
  State (i.e., map key) is srcip. Need to ensure packets with the same srcip needs to be processed by the same core. The NIC does not support to only use srcip for hash function, but both srcip and dstip
• -> at most (# of benchmarks) pcap files

Shared nothing

• add padding, modify dst mac
• modify src mac for RSS
• Add metadata
• -> (# of cores) * (# of benchmarks) pcap files

Scripts implemented:
https://github.com/smartnic/bpf-profile/tree/main/profile/pkt_trace

[QiongwenXu]

@sebymiano
pcap file generate scripts: https://github.com/smartnic/bpf-profile/tree/main/dpdk_burst_replay/pkt_trace
pcap file folder: https://drive.google.com/drive/folders/1s704Mpi8VJpKD0ua1Y-iTLvZTdjoBDSR?usp=drive_link

- original pcap file: trace_10_mtu1500.pcap
- Shared state: shared_state_[#cores].pcap
- Flow affinity: [benchmark]_flow_affinity.pcap
- Shared nothing: [benchmark]_shared_nothing_[#cores].pcap