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From: Daniel Borkmann <daniel@iogearbox.net>
To: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>,
	Alexei Starovoitov <alexei.starovoitov@gmail.com>,
	Song Liu <songliubraving@fb.com>
Cc: bpf@vger.kernel.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, ast@kernel.org, kernel-team@fb.com,
	peterz@infradead.org, acme@redhat.com, jolsa@kernel.org,
	namhyung@kernel.org
Subject: Re: [PATCH v7 perf,bpf 02/15] bpf: libbpf: introduce bpf_program__get_prog_info_linear()
Date: Mon, 11 Mar 2019 21:45:49 +0100	[thread overview]
Message-ID: <b6fb25aa-5bfc-cf97-f960-5966154e5ef5@iogearbox.net> (raw)
In-Reply-To: <20190311182631.GX10690@kernel.org>

On 03/11/2019 07:26 PM, Arnaldo Carvalho de Melo wrote:
> Em Thu, Mar 07, 2019 at 09:57:57AM -0800, Song Liu escreveu:
>> Currently, bpf_prog_info includes 9 arrays. The user has the option to
>> fetch any combination of these arrays. However, this requires a lot of
>> handling of these arrays. This work becomes more tricky when we need to
>> store bpf_prog_info to a file, because these arrays are allocated
>> independently.
>>
>> This patch introduces struct bpf_prog_info_linear, which stores arrays
>> of bpf_prog_info in continues memory. Helper functions are introduced
>> to unify the work to get different information of bpf_prog_info.
>> Specifically, bpf_program__get_prog_info_linear() allows the user to
>> select which arrays to fetch, and handles details for the user.
>>
>> Plesae see the comments before enum bpf_prog_info_array for more details
>> and examples.
>>
>> Cc: Daniel Borkmann <daniel@iogearbox.net>
>> Cc: Alexei Starovoitov <ast@kernel.org>
> 
> Daniel, are you ok with these changes to libbpf and bpftool? Perhaps
> those should be detached from this patchkit and submitted sooner,
> eroding the size of this kit.
> 
> Alternatively, if you're ok with it, please provide your Acked-by and
> I'll process as soon as I get back to it after Jiri is done reviewing.

Overall looks okay. Are you planning to get these in for 5.1 window? If
yes, that would be great, otherwise we might need to cherry-pick the libbpf
and bpftool ones from your tree into bpf-next as well since there's just
too much going on in this area where we'd potentially run into complex
merge conflicts. In the latter case, libbpf.map would need to be fixed up
to LIBBPF_0.0.3 as convention is that this is in line with kernel release.

Thanks,
Daniel

> - Arnaldo

  reply	other threads:[~2019-03-11 20:45 UTC|newest]

Thread overview: 100+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-07 17:57 [PATCH v7 perf,bpf 00/15] perf annotation of BPF programs Song Liu
2019-03-07 17:57 ` [PATCH v7 perf,bpf 01/15] perf, bpf: consider events with attr.bpf_event as side-band events Song Liu
2019-03-07 17:57 ` [PATCH v7 perf,bpf 02/15] bpf: libbpf: introduce bpf_program__get_prog_info_linear() Song Liu
2019-03-11 18:26   ` Arnaldo Carvalho de Melo
2019-03-11 20:45     ` Daniel Borkmann [this message]
2019-03-11 20:57       ` Arnaldo Carvalho de Melo
2019-03-12 11:20         ` Daniel Borkmann
2019-03-07 17:57 ` [PATCH v7 perf,bpf 03/15] bpf: bpftool: use bpf_program__get_prog_info_linear() in prog.c:do_dump() Song Liu
2019-03-07 17:57 ` [PATCH v7 perf,bpf 04/15] perf, bpf: synthesize bpf events with bpf_program__get_prog_info_linear() Song Liu
2019-03-07 17:58 ` [PATCH v7 perf,bpf 05/15] perf: change prototype of perf_event__synthesize_bpf_events() Song Liu
2019-03-07 17:58 ` [PATCH v7 perf,bpf 06/15] perf, bpf: save bpf_prog_info in a rbtree in perf_env Song Liu
2019-03-07 17:58 ` [PATCH v7 perf,bpf 07/15] perf, bpf: save bpf_prog_info information as headers to perf.data Song Liu
2019-03-11 17:56   ` Jiri Olsa
2019-03-11 18:05     ` Song Liu
2019-03-07 17:58 ` [PATCH v7 perf,bpf 08/15] perf, bpf: save btf in a rbtree in perf_env Song Liu
2019-03-07 17:58 ` [PATCH v7 perf,bpf 09/15] perf, bpf: save btf information as headers to perf.data Song Liu
2019-03-11 17:56   ` Jiri Olsa
2019-03-07 17:58 ` [PATCH v7 perf,bpf 10/15] perf-top: add option --no-bpf-event Song Liu
2019-03-07 17:58 ` [PATCH v7 perf,bpf 11/15] perf: add -lopcodes to feature-libbfd Song Liu
2019-03-07 23:26   ` Stanislav Fomichev
2019-03-07 23:47     ` Song Liu
2019-03-07 17:58 ` [PATCH v7 perf,bpf 12/15] perf, bpf: enable annotation of bpf program Song Liu
2019-03-11 17:56   ` Jiri Olsa
2019-03-11 18:04     ` Song Liu
2019-03-07 17:58 ` [PATCH v7 perf,bpf 13/15] perf, bpf: process PERF_BPF_EVENT_PROG_LOAD for annotation Song Liu
2019-03-07 17:58 ` [PATCH v7 perf,bpf 14/15] perf: introduce side band thread Song Liu
2019-03-11 17:57   ` Jiri Olsa
2019-03-07 17:58 ` [PATCH v7 perf,bpf 15/15] perf, bpf: save bpf_prog_info and btf of short living bpf programs Song Liu
2019-03-11 13:59 ` [PATCH v7 perf,bpf 00/15] perf annotation of BPF programs Jiri Olsa
2019-03-11 14:16   ` Song Liu
2019-03-12  5:30 [PATCH v9 " Song Liu
2019-03-12  5:30 ` [PATCH v9 perf,bpf 01/15] perf-record: replace option --bpf-event with --no-bpf-event Song Liu
2019-03-22 22:35   ` [tip:perf/urgent] perf record: Replace " tip-bot for Song Liu
2019-03-12  5:30 ` [PATCH v9 perf,bpf 02/15] bpf: libbpf: introduce bpf_program__get_prog_info_linear() Song Liu
2019-03-12 13:50   ` Arnaldo Carvalho de Melo
2019-03-22 22:36   ` [tip:perf/urgent] tools lib bpf: Introduce bpf_program__get_prog_info_linear() tip-bot for Song Liu
2019-03-12  5:30 ` [PATCH v9 perf,bpf 03/15] bpf: bpftool: use bpf_program__get_prog_info_linear() in prog.c:do_dump() Song Liu
2019-03-22 22:36   ` [tip:perf/urgent] " tip-bot for Song Liu
2019-03-12  5:30 ` [PATCH v9 perf,bpf 04/15] perf, bpf: synthesize bpf events with bpf_program__get_prog_info_linear() Song Liu
2019-03-13 21:00   ` Arnaldo Carvalho de Melo
2019-03-13 21:08     ` Arnaldo Carvalho de Melo
2019-03-14  5:08       ` Song Liu
2019-03-14 16:45         ` Song Liu
2019-03-14 18:30           ` Arnaldo Carvalho de Melo
2019-03-22 22:37   ` [tip:perf/urgent] perf bpf: Synthesize " tip-bot for Song Liu
2019-03-12  5:30 ` [PATCH v9 perf,bpf 05/15] perf: change prototype of perf_event__synthesize_bpf_events() Song Liu
2019-03-22 22:37   ` [tip:perf/urgent] perf bpf: Make synthesize_bpf_events() receive perf_session pointer instead of perf_tool tip-bot for Song Liu
2019-03-12  5:30 ` [PATCH v9 perf,bpf 06/15] perf, bpf: save bpf_prog_info in a rbtree in perf_env Song Liu
2019-03-12 13:10   ` Jiri Olsa
2019-03-12 14:34     ` Arnaldo Carvalho de Melo
2019-03-22 22:38   ` [tip:perf/urgent] perf bpf: Save " tip-bot for Song Liu
2019-03-12  5:30 ` [PATCH v9 perf,bpf 07/15] perf, bpf: save bpf_prog_info information as headers to perf.data Song Liu
2019-03-12 13:10   ` Jiri Olsa
2019-03-12 14:47     ` Arnaldo Carvalho de Melo
2019-03-13 19:05   ` Arnaldo Carvalho de Melo
2019-03-22 22:39   ` [tip:perf/urgent] perf bpf: Save " tip-bot for Song Liu
2019-03-12  5:30 ` [PATCH v9 perf,bpf 08/15] perf, bpf: save btf in a rbtree in perf_env Song Liu
2019-03-12 15:00   ` Arnaldo Carvalho de Melo
2019-03-22 22:39   ` [tip:perf/urgent] perf bpf: Save BTF " tip-bot for Song Liu
2019-03-12  5:30 ` [PATCH v9 perf,bpf 09/15] perf, bpf: save btf information as headers to perf.data Song Liu
2019-03-12 15:14   ` Arnaldo Carvalho de Melo
2019-03-12 15:16     ` Arnaldo Carvalho de Melo
2019-03-12 16:26       ` Song Liu
2019-03-12 17:05         ` Arnaldo Carvalho de Melo
2019-03-12 17:29           ` Song Liu
2019-03-15 19:06             ` Arnaldo Carvalho de Melo
2019-03-15 19:26               ` Arnaldo Carvalho de Melo
2019-03-15 19:31                 ` Song Liu
2019-03-15 19:42                 ` Arnaldo Carvalho de Melo
2019-03-22 22:40   ` [tip:perf/urgent] perf bpf: Save BTF " tip-bot for Song Liu
2019-03-12  5:30 ` [PATCH v9 perf,bpf 10/15] perf-top: add option --no-bpf-event Song Liu
2019-03-22 22:41   ` [tip:perf/urgent] perf top: Add " tip-bot for Song Liu
2019-03-12  5:30 ` [PATCH v9 perf,bpf 11/15] perf: add -lopcodes to feature-libbfd Song Liu
2019-03-22 22:41   ` [tip:perf/urgent] perf feature detection: Add " tip-bot for Song Liu
2019-03-12  5:30 ` [PATCH v9 perf,bpf 12/15] perf, bpf: enable annotation of bpf program Song Liu
2019-03-18 16:38   ` Arnaldo Carvalho de Melo
2019-03-18 16:43     ` Arnaldo Carvalho de Melo
2019-03-19  6:10       ` Song Liu
2019-03-19 13:37         ` Arnaldo Carvalho de Melo
2019-03-19  6:05     ` Song Liu
2019-03-19 13:37       ` Arnaldo Carvalho de Melo
2019-03-19 13:58       ` Arnaldo Carvalho de Melo
2019-03-19 14:14         ` Arnaldo Carvalho de Melo
2019-03-19 14:52           ` [WORKS!] " Arnaldo Carvalho de Melo
2019-03-19 16:51             ` Song Liu
2019-03-19 16:55               ` Arnaldo Carvalho de Melo
2019-03-19 17:07                 ` Arnaldo Carvalho de Melo
2019-03-22 22:42   ` [tip:perf/urgent] perf symbols: Introduce DSO_BINARY_TYPE__BPF_PROG_INFO tip-bot for Song Liu
2019-03-22 22:43   ` [tip:perf/urgent] perf build: Check what binutils's 'disassembler()' signature to use tip-bot for Song Liu
2019-03-22 22:44   ` [tip:perf/urgent] perf annotate: Enable annotation of BPF programs tip-bot for Song Liu
2019-03-12  5:30 ` [PATCH v9 perf,bpf 13/15] perf, bpf: process PERF_BPF_EVENT_PROG_LOAD for annotation Song Liu
2019-03-22 22:43   ` [tip:perf/urgent] perf bpf: Process " tip-bot for Song Liu
2019-03-12  5:30 ` [PATCH v9 perf,bpf 14/15] perf: introduce side band thread Song Liu
2019-03-22 22:45   ` [tip:perf/urgent] perf evlist: Introduce " tip-bot for Song Liu
2019-03-12  5:30 ` [PATCH v9 perf,bpf 15/15] perf, bpf: save bpf_prog_info and btf of short living bpf programs Song Liu
2019-03-19 15:25   ` Arnaldo Carvalho de Melo
2019-03-22 22:45   ` [tip:perf/urgent] perf tools: Save bpf_prog_info and BTF of new BPF programs tip-bot for Song Liu
2019-03-12 13:12 ` [PATCH v9 perf,bpf 00/15] perf annotation of " Jiri Olsa
2019-03-21  9:10 ` Jiri Olsa
2019-03-21 14:12   ` Arnaldo Carvalho de Melo

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