linux-kernel - Re: [PATCHSET 0/9] perf annotate: More memory footprint reduction

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Date: Fri, 5 Apr 2024 16:44:09 -0700
From: Ian Rogers <irogers@...gle.com>
To: Namhyung Kim <namhyung@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>, Kan Liang <kan.liang@...ux.intel.com>, 
	Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>, 
	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>, 
	LKML <linux-kernel@...r.kernel.org>, linux-perf-users@...r.kernel.org
Subject: Re: [PATCHSET 0/9] perf annotate: More memory footprint reduction

On Thu, Apr 4, 2024 at 10:57 AM Namhyung Kim <namhyung@...nel.org> wrote:
>
> Hello,
>
> This work is continuation of the previous work to reduce the memory
> usage in symbol and annotation structures.  Basically I moved some
> fields in the annotation which consume spaces in the struct symbol
> which is allocated regardless if the symbol has a sample or not when
> annotation is enabled.
>
> With this change applied, the struct annotation only has two members -
> annotated_source and annotated_branch.  The next step would be to
> remove the struct annotation and to have a hash table from symbol to
> each annotated struct directly.
>
> No function changes intended.
>
> The code is available at perf/annotate-diet-v3 branch in
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git
>
> Thanks,
> Namhyung
>
>
> Namhyung Kim (9):
>   perf annotate: Fix annotation_calc_lines()
>   perf annotate: Staticize some local functions
>   perf annotate: Introduce annotated_source__get_line()
>   perf annotate: Check annotation lines more efficiently
>   perf annotate: Get rid of offsets array
>   perf annotate: Move widths struct to annotated_source
>   perf annotate: Move max_jump_sources struct to annotated_source
>   perf annotate: Move nr_events struct to annotated_source
>   perf annotate: Move start field struct to annotated_source

Series:

Tested-by: Ian Rogers <irogers@...gle.com>

using -fsanitize=address. Only nit was noticing 4 bytes of padding.

Thanks,
Ian

>  tools/perf/ui/browsers/annotate.c |  15 ++-
>  tools/perf/util/annotate.c        | 174 +++++++++++++++++-------------
>  tools/perf/util/annotate.h        |  39 +++----
>  3 files changed, 123 insertions(+), 105 deletions(-)
>
>
> base-commit: b6347cb5e04e9c1d17342ab46e2ace2d448de727
> --
> 2.44.0.478.gd926399ef9-goog
>