iovisor-dev@lists.iovisor.org | Can multiple BPF programs use same per-cpu perf ring buffer?

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Can multiple BPF programs use same per-cpu perf ring buffer?

Hayden Livingston #1804 Imagine I have a per-cpu perf ring buffer for all my cpus. Now I have two eBPF programs. In both these eBPF programs I do bpf_update_elem(myFD, &cpunumberkey, &fdOfCPUspecificBuffer, BPF_ANY) Will this mean that multiple eBPF programs will be able to write their data into a single buffer (of course associated with cpu). This would be amazing if it is truly possible. It seems like it should be possible. I have not tried yet.
Yonghong Song #1807 On Sun, Feb 16, 2020 at 8:43 PM Hayden Livingston <halivingston@...> wrote: Imagine I have a per-cpu perf ring buffer for all my cpus. Now I have two eBPF programs. In both these eBPF programs I do bpf_update_elem(myFD, &cpunumberkey, &fdOfCPUspecificBuffer, BPF_ANY) Will this mean that multiple eBPF programs will be able to write their data into a single buffer (of course associated with cpu). This would be amazing if it is truly possible. It seems like it should be possible. Yes, you can do this. I have not tried yet.

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