linux-kernel - Re: [RFC PATCH] perf tools: Add a place to put kernel config fragments for test runs

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Date:   Wed, 14 Jun 2023 11:13:26 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     James Clark <james.clark@....com>,
        Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-perf-users@...r.kernel.org, broonie@...nel.org,
        Aishwarya.TCV@....com, Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] perf tools: Add a place to put kernel config
 fragments for test runs

Em Wed, Jun 14, 2023 at 03:02:19PM +0100, James Clark escreveu:
> We are currently keeping something like this in our CI because defconfig
> doesn't give full coverage. It's not complete yet, but is a starting
> point as a place to add to when a specific test needs something extra to
> run.
> 
> The RFC is for discussion on folder placement and file naming etc.

Would be interesting to add the Kconfig maintainer to see if they have
an opinion, Masahiro?

- Arnaldo
 
> Signed-off-by: James Clark <james.clark@....com>
> ---
>  tools/perf/tests/config-fragments/README  |  7 +++++++
>  tools/perf/tests/config-fragments/aarch64 |  1 +
>  tools/perf/tests/config-fragments/config  | 11 +++++++++++
>  3 files changed, 19 insertions(+)
>  create mode 100644 tools/perf/tests/config-fragments/README
>  create mode 100644 tools/perf/tests/config-fragments/aarch64
>  create mode 100644 tools/perf/tests/config-fragments/config
> 
> diff --git a/tools/perf/tests/config-fragments/README b/tools/perf/tests/config-fragments/README
> new file mode 100644
> index 000000000000..e816cfb1b96d
> --- /dev/null
> +++ b/tools/perf/tests/config-fragments/README
> @@ -0,0 +1,7 @@
> +This folder is for kernel config fragments that can be merged with
> +defconfig to give full test coverage of a perf test run. This is only
> +an optimistic set as some features require hardware support in order to
> +pass and not skip.
> +
> +'config' is shared across all platforms, and for arch specific files,
> +the file name should match that returned by 'uname -m'.
> diff --git a/tools/perf/tests/config-fragments/aarch64 b/tools/perf/tests/config-fragments/aarch64
> new file mode 100644
> index 000000000000..64c4ab17cd58
> --- /dev/null
> +++ b/tools/perf/tests/config-fragments/aarch64
> @@ -0,0 +1 @@
> +CONFIG_CORESIGHT_SOURCE_ETM4X=y
> diff --git a/tools/perf/tests/config-fragments/config b/tools/perf/tests/config-fragments/config
> new file mode 100644
> index 000000000000..c340b3195fca
> --- /dev/null
> +++ b/tools/perf/tests/config-fragments/config
> @@ -0,0 +1,11 @@
> +CONFIG_TRACEPOINTS=y
> +CONFIG_STACKTRACE=y
> +CONFIG_NOP_TRACER=y
> +CONFIG_RING_BUFFER=y
> +CONFIG_EVENT_TRACING=y
> +CONFIG_CONTEXT_SWITCH_TRACER=y
> +CONFIG_TRACING=y
> +CONFIG_GENERIC_TRACER=y
> +CONFIG_FTRACE=y
> +CONFIG_FTRACE_SYSCALLS=y
> +CONFIG_BRANCH_PROFILE_NONE=y
> -- 
> 2.34.1
> 

-- 

- Arnaldo