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From: Andrii Nakryiko <andrii.nakryiko@gmail.com>
To: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Andrii Nakryiko <andriin@fb.com>, bpf <bpf@vger.kernel.org>,
	Networking <netdev@vger.kernel.org>,
	Alexei Starovoitov <ast@fb.com>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Kernel Team <kernel-team@fb.com>,
	"Paul E . McKenney" <paulmck@kernel.org>,
	Jonathan Lemon <jonathan.lemon@gmail.com>
Subject: Re: [PATCH v2 bpf-next 5/7] selftests/bpf: add BPF ringbuf selftests
Date: Fri, 22 May 2020 11:58:24 -0700
Message-ID: <CAEf4BzZy+iVMfVCHP-PT5hdeWwmjgqp5dpPvhzbz1bsateJN_Q@mail.gmail.com> (raw)
In-Reply-To: <20200522012034.sufpu7e62itcn2vg@ast-mbp.dhcp.thefacebook.com>

On Thu, May 21, 2020 at 6:20 PM Alexei Starovoitov
<alexei.starovoitov@gmail.com> wrote:
>
> On Sun, May 17, 2020 at 12:57:25PM -0700, Andrii Nakryiko wrote:
> > diff --git a/tools/testing/selftests/bpf/progs/test_ringbuf_multi.c b/tools/testing/selftests/bpf/progs/test_ringbuf_multi.c
> > new file mode 100644
> > index 000000000000..7eb85dd9cd66
> > --- /dev/null
> > +++ b/tools/testing/selftests/bpf/progs/test_ringbuf_multi.c
> > @@ -0,0 +1,77 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +// Copyright (c) 2019 Facebook
>
> oops ;)
>

heh, still living in good old 2019... :) fixing...

> > +
> > +#include <linux/bpf.h>
> > +#include <bpf/bpf_helpers.h>
> > +
> > +char _license[] SEC("license") = "GPL";
> > +
> > +struct sample {
> > +     int pid;
> > +     int seq;
> > +     long value;
> > +     char comm[16];
> > +};
> > +
> > +struct ringbuf_map {
> > +     __uint(type, BPF_MAP_TYPE_RINGBUF);
> > +     __uint(max_entries, 1 << 12);
> > +} ringbuf1 SEC(".maps"),
> > +  ringbuf2 SEC(".maps");
> > +
> > +struct {
> > +     __uint(type, BPF_MAP_TYPE_ARRAY_OF_MAPS);
> > +     __uint(max_entries, 4);
> > +     __type(key, int);
> > +     __array(values, struct ringbuf_map);
> > +} ringbuf_arr SEC(".maps") = {
> > +     .values = {
> > +             [0] = &ringbuf1,
> > +             [2] = &ringbuf2,
> > +     },
> > +};
>
> the tests look great. Very easy to understand the usage model.

great, thanks!

  reply index

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-17 19:57 [PATCH v2 bpf-next 0/7] BPF ring buffer Andrii Nakryiko
2020-05-17 19:57 ` [PATCH v2 bpf-next 1/7] bpf: implement BPF ring buffer and verifier support for it Andrii Nakryiko
2020-05-19 12:57   ` kbuild test robot
2020-05-19 23:53   ` kbuild test robot
2020-05-22  0:25   ` Paul E. McKenney
2020-05-22 18:46     ` Andrii Nakryiko
2020-05-25 16:01       ` Paul E. McKenney
2020-05-25 18:45         ` Andrii Nakryiko
2020-05-22  1:07   ` Alexei Starovoitov
2020-05-22 18:48     ` Andrii Nakryiko
2020-05-25 20:34     ` Andrii Nakryiko
2020-05-17 19:57 ` [PATCH v2 bpf-next 2/7] tools/memory-model: add BPF ringbuf MPSC litmus tests Andrii Nakryiko
2020-05-22  0:34   ` Paul E. McKenney
2020-05-22 18:51     ` Andrii Nakryiko
2020-05-25 23:33       ` Andrii Nakryiko
2020-05-26  3:05         ` Paul E. McKenney
2020-05-17 19:57 ` [PATCH v2 bpf-next 3/7] bpf: track reference type in verifier Andrii Nakryiko
2020-05-22  1:13   ` Alexei Starovoitov
2020-05-22 18:53     ` Andrii Nakryiko
2020-05-17 19:57 ` [PATCH v2 bpf-next 4/7] libbpf: add BPF ring buffer support Andrii Nakryiko
2020-05-22  1:15   ` Alexei Starovoitov
2020-05-22 18:56     ` Andrii Nakryiko
2020-05-17 19:57 ` [PATCH v2 bpf-next 5/7] selftests/bpf: add BPF ringbuf selftests Andrii Nakryiko
2020-05-22  1:20   ` Alexei Starovoitov
2020-05-22 18:58     ` Andrii Nakryiko [this message]
2020-05-17 19:57 ` [PATCH v2 bpf-next 6/7] bpf: add BPF ringbuf and perf buffer benchmarks Andrii Nakryiko
2020-05-22  1:21   ` Alexei Starovoitov
2020-05-22 19:07     ` Andrii Nakryiko
2020-05-17 19:57 ` [PATCH v2 bpf-next 7/7] docs/bpf: add BPF ring buffer design notes Andrii Nakryiko
2020-05-22  1:23   ` Alexei Starovoitov
2020-05-22 19:08     ` Andrii Nakryiko
2020-05-25  9:59   ` Alban Crequy
2020-05-25 19:12     ` Andrii Nakryiko

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