linux-kernel - Re: [PATCH] perf test: Disable breakpoint signal tests for powerpc

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Date:   Thu, 1 Jun 2017 10:04:58 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Namhyung Kim <namhyung@...nel.org>,
        David Ahern <dsahern@...il.com>
Subject: Re: [PATCH] perf test: Disable breakpoint signal tests for powerpc

Em Tue, May 16, 2017 at 07:49:42PM +0200, Jiri Olsa escreveu:
> Following tests are constantly failing on powerpc:
> 
>   # perf test break
>   18: Breakpoint overflow signal handler         : FAILED!
>   19: Breakpoint overflow sampling               : FAILED!
> 
> The powerpc so far does not have support to even create
> instruction breakpoint using the perf event interface,
> so those tests fail early in the config phase.
> 
> I added 'ison' callback to test struct to be able to
> disable specific test. It seems better than putting
> ifdefs directly to the test array.
> 
> Link: http://lkml.kernel.org/n/tip-erwshbq6f7b7hdtu65z5a25y@git.kernel.org
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
>  tools/perf/tests/bp_signal.c    | 14 ++++++++++++++
>  tools/perf/tests/builtin-test.c |  7 +++++++
>  tools/perf/tests/tests.h        |  3 +++
>  3 files changed, 24 insertions(+)
> 
> diff --git a/tools/perf/tests/bp_signal.c b/tools/perf/tests/bp_signal.c
> index e7664fe3bd33..0467c3b6d849 100644
> --- a/tools/perf/tests/bp_signal.c
> +++ b/tools/perf/tests/bp_signal.c
> @@ -288,3 +288,17 @@ int test__bp_signal(int subtest __maybe_unused)
>  	return count1 == 1 && overflows == 3 && count2 == 3 && overflows_2 == 3 && count3 == 2 ?
>  		TEST_OK : TEST_FAIL;
>  }
> +
> +bool test__bp_signal_is_on(void)

Can you please rename this "_is_on()" thing to "_supported()"?

- Arnaldo

> +{
> +/*
> + * The powerpc so far does not have support to even create
> + * instruction breakpoint using the perf event interface.
> + * Once it's there we can release this.
> + */
> +#ifdef __powerpc__
> +	return false;
> +#else
> +	return true;
> +#endif
> +}
> diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
> index 9e08d297f1a9..ddbbff7e4148 100644
> --- a/tools/perf/tests/builtin-test.c
> +++ b/tools/perf/tests/builtin-test.c
> @@ -97,10 +97,12 @@ static struct test generic_tests[] = {
>  	{
>  		.desc = "Breakpoint overflow signal handler",
>  		.func = test__bp_signal,
> +		.ison = test__bp_signal_is_on,
>  	},
>  	{
>  		.desc = "Breakpoint overflow sampling",
>  		.func = test__bp_signal_overflow,
> +		.ison = test__bp_signal_is_on,
>  	},
>  	{
>  		.desc = "Number of exit events of a simple workload",
> @@ -401,6 +403,11 @@ static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist)
>  		if (!perf_test__matches(t, curr, argc, argv))
>  			continue;
>  
> +		if (t->ison && !t->ison()) {
> +			pr_debug("%2d: %-*s: Disabled\n", i, width, t->desc);
> +			continue;
> +		}
> +
>  		pr_info("%2d: %-*s:", i, width, t->desc);
>  
>  		if (intlist__find(skiplist, i)) {
> diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
> index 631859629403..1e72f14845c6 100644
> --- a/tools/perf/tests/tests.h
> +++ b/tools/perf/tests/tests.h
> @@ -34,6 +34,7 @@ struct test {
>  		int (*get_nr)(void);
>  		const char *(*get_desc)(int subtest);
>  	} subtest;
> +	bool (*ison)(void);
>  };
>  
>  /* Tests */
> @@ -99,6 +100,8 @@ const char *test__clang_subtest_get_desc(int subtest);
>  int test__clang_subtest_get_nr(void);
>  int test__unit_number__scnprint(int subtest);
>  
> +bool test__bp_signal_is_on(void);
> +
>  #if defined(__arm__) || defined(__aarch64__)
>  #ifdef HAVE_DWARF_UNWIND_SUPPORT
>  struct thread;
> -- 
> 2.9.4