On 12/9/2019 5:55 AM, Björn Töpel wrote:
Overview ======== This is the 4th iteration of the series that introduces the BPF dispatcher, which is a mechanism to avoid indirect calls.
Good to see the progress with getting a mechansism to avoid indirect calls upstream. [...]
Performance =========== The tests were performed using the xdp_rxq_info sample program with the following command-line: 1. XDP_DRV: # xdp_rxq_info --dev eth0 --action XDP_DROP 2. XDP_SKB: # xdp_rxq_info --dev eth0 -S --action XDP_DROP 3. xdp-perf, from selftests/bpf: # test_progs -v -t xdp_perf
What is this test_progs? I don't see such ann app under selftests/bpf
Run with mitigations=auto ------------------------- Baseline: 1. 22.0 Mpps 2. 3.8 Mpps 3. 15 ns Dispatcher: 1. 29.4 Mpps (+34%) 2. 4.0 Mpps (+5%) 3. 5 ns (+66%) Dispatcher (full; walk all entries, and fallback): 1. 20.4 Mpps (-7%) 2. 3.8 Mpps 3. 18 ns (-20%)
Are these packets received on a single queue? Or multiple queues? Do you see similar improvements even with xdpsock? Thanks Sridhar
