From: Jiri Olsa <olsajiri@gmail.com>
To: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>, bpf <bpf@vger.kernel.org>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@chromium.org>,
Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>,
Hou Tao <houtao1@huawei.com>, Daniel Xu <dxu@dxuuu.xyz>
Subject: Re: [PATCH bpf-next 01/12] bpf: Move update_prog_stats to syscall object
Date: Tue, 29 Aug 2023 10:00:27 +0200 [thread overview]
Message-ID: <ZO2lmzfblrGOmzxS@krava> (raw)
In-Reply-To: <CAADnVQLMZRn9E=czkHUxwTiW+9=y=qVYGo1_eOOni59HafemSw@mail.gmail.com>
On Mon, Aug 28, 2023 at 10:25:38AM -0700, Alexei Starovoitov wrote:
> On Mon, Aug 28, 2023 at 12:55 AM Jiri Olsa <jolsa@kernel.org> wrote:
> >
> > static void notrace __bpf_prog_exit_recur(struct bpf_prog *prog, u64 start,
> > struct bpf_tramp_run_ctx *run_ctx)
> > __releases(RCU)
> > {
> > bpf_reset_run_ctx(run_ctx->saved_run_ctx);
> >
> > - update_prog_stats(prog, start);
> > + bpf_prog_update_prog_stats(prog, start);
>
> I bet this adds a noticeable performance regression.
> The function was inlined before and the static key made it a nop.
> Above makes it into a function call.
> Please use always_inline and move it to a header.
right.. will change
thanks,
jirka
next prev parent reply other threads:[~2023-08-29 8:00 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-28 7:55 [PATCH bpf-next 00/12] bpf: Add missed stats for kprobes Jiri Olsa
2023-08-28 7:55 ` [PATCH bpf-next 01/12] bpf: Move update_prog_stats to syscall object Jiri Olsa
2023-08-28 17:25 ` Alexei Starovoitov
2023-08-29 8:00 ` Jiri Olsa [this message]
2023-08-28 7:55 ` [PATCH bpf-next 02/12] bpf: Move bpf_prog_start_time to linux/filter.h Jiri Olsa
2023-09-04 13:12 ` Hou Tao
2023-08-28 7:55 ` [PATCH bpf-next 03/12] bpf: Count stats for kprobe_multi programs Jiri Olsa
2023-09-04 13:30 ` Hou Tao
2023-09-05 6:15 ` Hou Tao
2023-09-05 7:19 ` Jiri Olsa
2023-08-28 7:55 ` [PATCH bpf-next 04/12] bpf: Add missed value to kprobe_multi link info Jiri Olsa
2023-09-04 13:33 ` Hou Tao
2023-08-28 7:55 ` [PATCH bpf-next 05/12] bpf: Add missed value to kprobe perf " Jiri Olsa
2023-09-05 2:23 ` Hou Tao
2023-09-05 7:19 ` Jiri Olsa
2023-08-28 7:55 ` [PATCH bpf-next 06/12] bpf: Count missed stats in trace_call_bpf Jiri Olsa
2023-08-28 17:32 ` Alexei Starovoitov
2023-08-29 8:04 ` Jiri Olsa
2023-08-28 7:55 ` [PATCH bpf-next 07/12] bpf: Move bpf_prog_run_array down in the header file Jiri Olsa
2023-08-28 7:55 ` [PATCH bpf-next 08/12] bpf: Count run stats in bpf_prog_run_array Jiri Olsa
2023-09-05 2:40 ` Hou Tao
2023-09-05 7:19 ` Jiri Olsa
2023-08-28 7:55 ` [PATCH bpf-next 09/12] bpftool: Display missed count for kprobe_multi link Jiri Olsa
2023-08-29 16:40 ` Quentin Monnet
2023-08-30 10:46 ` Jiri Olsa
2023-08-28 7:55 ` [PATCH bpf-next 10/12] bpftool: Display missed count for kprobe perf link Jiri Olsa
2023-08-29 16:42 ` Quentin Monnet
2023-08-30 16:01 ` Jiri Olsa
2023-08-28 7:55 ` [PATCH bpf-next 11/12] selftests/bpf: Add test missed counts of perf event link kprobe Jiri Olsa
2023-09-05 3:14 ` Hou Tao
2023-08-28 7:55 ` [PATCH bpf-next 12/12] selftests/bpf: Add test recursion stats " Jiri Olsa
2023-09-05 3:23 ` Hou Tao
2023-09-05 3:30 ` [PATCH bpf-next 00/12] bpf: Add missed stats for kprobes Hou Tao
2023-09-05 7:20 ` Jiri Olsa
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