linux-kernel - Re: [PATCH 7/9] perf test: Support PERF_SAMPLE_WEIGHT

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Date:   Wed, 3 Feb 2021 17:44:48 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     kan.liang@...ux.intel.com
Cc:     mingo@...nel.org, linux-kernel@...r.kernel.org,
        peterz@...radead.org, eranian@...gle.com, namhyung@...nel.org,
        jolsa@...hat.com, ak@...ux.intel.com, yao.jin@...ux.intel.com,
        maddy@...ux.vnet.ibm.com
Subject: Re: [PATCH 7/9] perf test: Support PERF_SAMPLE_WEIGHT_STRUCT

Em Tue, Feb 02, 2021 at 12:09:11PM -0800, kan.liang@...ux.intel.com escreveu:
> From: Kan Liang <kan.liang@...ux.intel.com>
> 
> Support the new sample type for sample-parsing test case.

ditto wrt code page size
 
> Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
> ---
>  tools/perf/tests/sample-parsing.c | 14 +++++++++++---
>  1 file changed, 11 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/perf/tests/sample-parsing.c b/tools/perf/tests/sample-parsing.c
> index 2393916..c5739cc 100644
> --- a/tools/perf/tests/sample-parsing.c
> +++ b/tools/perf/tests/sample-parsing.c
> @@ -129,6 +129,9 @@ static bool samples_same(const struct perf_sample *s1,
>  	if (type & PERF_SAMPLE_WEIGHT)
>  		COMP(weight);
>  
> +	if (type & PERF_SAMPLE_WEIGHT_STRUCT)
> +		COMP(ins_lat);
> +
>  	if (type & PERF_SAMPLE_DATA_SRC)
>  		COMP(data_src);
>  
> @@ -238,6 +241,7 @@ static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
>  		.phys_addr	= 113,
>  		.cgroup		= 114,
>  		.data_page_size = 115,
> +		.ins_lat	= 116,
>  		.aux_sample	= {
>  			.size	= sizeof(aux_data),
>  			.data	= (void *)aux_data,
> @@ -344,7 +348,7 @@ int test__sample_parsing(struct test *test __maybe_unused, int subtest __maybe_u
>  	 * were added.  Please actually update the test rather than just change
>  	 * the condition below.
>  	 */
> -	if (PERF_SAMPLE_MAX > PERF_SAMPLE_CODE_PAGE_SIZE << 1) {
> +	if (PERF_SAMPLE_MAX > PERF_SAMPLE_WEIGHT_STRUCT << 1) {
>  		pr_debug("sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating\n");
>  		return -1;
>  	}
> @@ -374,8 +378,12 @@ int test__sample_parsing(struct test *test __maybe_unused, int subtest __maybe_u
>  			return err;
>  	}
>  
> -	/* Test all sample format bits together */
> -	sample_type = PERF_SAMPLE_MAX - 1;
> +	/*
> +	 * Test all sample format bits together
> +	 * Note: PERF_SAMPLE_WEIGHT and PERF_SAMPLE_WEIGHT_STRUCT cannot
> +	 *       be set simultaneously.
> +	 */
> +	sample_type = (PERF_SAMPLE_MAX - 1) & ~PERF_SAMPLE_WEIGHT;
>  	sample_regs = 0x3fff; /* shared yb intr and user regs */
>  	for (i = 0; i < ARRAY_SIZE(rf); i++) {
>  		err = do_test(sample_type, sample_regs, rf[i]);
> -- 
> 2.7.4
> 

-- 

- Arnaldo