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Date: Thu, 25 Jan 2024 11:45:35 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Namhyung Kim <namhyung@...nel.org>
Cc: Ian Rogers <irogers@...gle.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: [PATCH RESEND] perf tools: Add -H short option for --hierarchy
Em Wed, Jan 24, 2024 at 09:51:24PM -0800, Namhyung Kim escreveu:
> I found the hierarchy mode useful, but it's easy to make a typo when
> using it. Let's add a short option for that.
Fair enough, but:
[root@...co ~]# perf report --hi + head -15
Error: Ambiguous option: hi (could be --hide-unresolved or --hierarchy)
Usage: perf report [<options>]
-U, --hide-unresolved
Only display entries resolved to a symbol
--hierarchy Show entries in a hierarchy
[root@...co ~]# perf report --hie | head -15
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 56 of event 'cycles:P'
# Event count (approx.): 13456952
#
# Overhead Command / Shared Object / Symbol
# .............. ........................................
#
72.56% swapper
72.56% [kernel.kallsyms]
72.56% [k] intel_idle_ibrs
18.53% perf
[root@...co ~]#
> Also update the documentation. :)
Thanks, as a suggestion maybe we should have a:
$ perf config ui.hierarchy
as we have:
[root@...co ~]# perf config ui.show-headers=true
[root@...co ~]# perf config ui.show-headers
ui.show-headers=true
[root@...co ~]#
Acked-by: Arnaldo Carvalho de Melo <acme@...hat.com>
- Arnaldo
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
> tools/perf/Documentation/perf-report.txt | 29 ++++++++++++++++++++-
> tools/perf/Documentation/perf-top.txt | 32 +++++++++++++++++++++++-
> tools/perf/builtin-report.c | 2 +-
> tools/perf/builtin-top.c | 2 +-
> 4 files changed, 61 insertions(+), 4 deletions(-)
>
> diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
> index 38f59ac064f7..d8b863e01fe0 100644
> --- a/tools/perf/Documentation/perf-report.txt
> +++ b/tools/perf/Documentation/perf-report.txt
> @@ -531,8 +531,35 @@ include::itrace.txt[]
> --raw-trace::
> When displaying traceevent output, do not use print fmt or plugins.
>
> +-H::
> --hierarchy::
> - Enable hierarchical output.
> + Enable hierarchical output. In the hierarchy mode, each sort key groups
> + samples based on the criteria and then sub-divide it using the lower
> + level sort key.
> +
> + For example:
> + In normal output:
> +
> + perf report -s dso,sym
> + # Overhead Shared Object Symbol
> + 50.00% [kernel.kallsyms] [k] kfunc1
> + 20.00% perf [.] foo
> + 15.00% [kernel.kallsyms] [k] kfunc2
> + 10.00% perf [.] bar
> + 5.00% libc.so [.] libcall
> +
> + In hierarchy output:
> +
> + perf report -s dso,sym --hierarchy
> + # Overhead Shared Object / Symbol
> + 65.00% [kernel.kallsyms]
> + 50.00% [k] kfunc1
> + 15.00% [k] kfunc2
> + 30.00% perf
> + 20.00% [.] foo
> + 10.00% [.] bar
> + 5.00% libc.so
> + 5.00% [.] libcall
>
> --inline::
> If a callgraph address belongs to an inlined function, the inline stack
> diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt
> index 3c202ec080ba..a754875fa5bb 100644
> --- a/tools/perf/Documentation/perf-top.txt
> +++ b/tools/perf/Documentation/perf-top.txt
> @@ -261,8 +261,38 @@ Default is to monitor all CPUS.
> --raw-trace::
> When displaying traceevent output, do not use print fmt or plugins.
>
> +-H::
> --hierarchy::
> - Enable hierarchy output.
> + Enable hierarchical output. In the hierarchy mode, each sort key groups
> + samples based on the criteria and then sub-divide it using the lower
> + level sort key.
> +
> + For example, in normal output:
> +
> + perf report -s dso,sym
> + #
> + # Overhead Shared Object Symbol
> + # ........ ................. ...........
> + 50.00% [kernel.kallsyms] [k] kfunc1
> + 20.00% perf [.] foo
> + 15.00% [kernel.kallsyms] [k] kfunc2
> + 10.00% perf [.] bar
> + 5.00% libc.so [.] libcall
> +
> + In hierarchy output:
> +
> + perf report -s dso,sym --hierarchy
> + #
> + # Overhead Shared Object / Symbol
> + # .......... ......................
> + 65.00% [kernel.kallsyms]
> + 50.00% [k] kfunc1
> + 15.00% [k] kfunc2
> + 30.00% perf
> + 20.00% [.] foo
> + 10.00% [.] bar
> + 5.00% libc.so
> + 5.00% [.] libcall
>
> --overwrite::
> Enable this to use just the most recent records, which helps in high core count
> diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> index f2ed2b7e80a3..ccb91fe6b876 100644
> --- a/tools/perf/builtin-report.c
> +++ b/tools/perf/builtin-report.c
> @@ -1410,7 +1410,7 @@ int cmd_report(int argc, const char **argv)
> "only show processor socket that match with this filter"),
> OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
> "Show raw trace event output (do not use print fmt or plugins)"),
> - OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
> + OPT_BOOLEAN('H', "hierarchy", &symbol_conf.report_hierarchy,
> "Show entries in a hierarchy"),
> OPT_CALLBACK_DEFAULT(0, "stdio-color", NULL, "mode",
> "'always' (default), 'never' or 'auto' only applicable to --stdio mode",
> diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
> index baf1ab083436..03cf45088fd8 100644
> --- a/tools/perf/builtin-top.c
> +++ b/tools/perf/builtin-top.c
> @@ -1573,7 +1573,7 @@ int cmd_top(int argc, const char **argv)
> "add last branch records to call history"),
> OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
> "Show raw trace event output (do not use print fmt or plugins)"),
> - OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
> + OPT_BOOLEAN('H', "hierarchy", &symbol_conf.report_hierarchy,
> "Show entries in a hierarchy"),
> OPT_BOOLEAN(0, "overwrite", &top.record_opts.overwrite,
> "Use a backward ring buffer, default: no"),
> --
> 2.43.0.429.g432eaa2c6b-goog
>
--
- Arnaldo
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