Re: [PATCH bpf-next v4 1/2] bpf, xdp: make bpf_redirect_map() a map operation
From: Jesper Dangaard Brouer <hidden>
Date: 2021-02-26 14:30:28
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bpf
On Fri, 26 Feb 2021 13:26:22 +0100 Toke Høiland-Jørgensen [off-list ref] wrote:
Björn Töpel [off-list ref] writes:quoted
On 2021-02-26 12:40, Björn Töpel wrote:quoted
On 2021-02-26 12:37, Toke Høiland-Jørgensen wrote:[...]quoted
quoted
(That last paragraph above is why I asked if you updated the performance numbers in the cover letter; removing an additional function call should affect those, right?)Yeah, it should. Let me spend some more time benchmarking on the DEVMAP scenario.I did a re-measure using samples/xdp_redirect_map. The setup is 64B packets blasted to an i40e. As a baseline, # xdp_rxq_info --dev ens801f1 --action XDP_DROP gives 24.8 Mpps. Now, xdp_redirect_map. Same NIC, two ports, receive from port A, redirect to port B: baseline: 14.3 Mpps this series: 15.4 Mpps which is almost 8%!Or 5 ns difference: 10**9/(14.3*10**6) - 10**9/(15.4*10**6) 4.995004995005004 Nice :)
Yes, this is a very significant improvement at this zoom-in benchmarking level :-) -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer