linux-kernel - Re: [PATCH] perf mem: Print memory operation type

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Message-ID: <Yl15c78idxjn3sKb@kernel.org>
Date:   Mon, 18 Apr 2022 11:45:07 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Leo Yan <leo.yan@...aro.org>
Cc:     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>,
        Kajol Jain <kjain@...ux.ibm.com>,
        Li Huafei <lihuafei1@...wei.com>,
        Ali Saidi <alisaidi@...zon.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf mem: Print memory operation type

Em Sun, Apr 17, 2022 at 08:45:24PM +0800, Leo Yan escreveu:
> The memory operation types are not only for load and store, for easier
> reviewing the memory operation type, this patch prints out it.
> 
> Before:
>   ls 14753 [011]  3678.072400:          1      l1d-miss:         88000182 L1 miss|SNP N/A|TLB Walker hit|LCK No|BLK  N/A ffffa7c22b4b2a00 [unknown] ([kernel.kallsyms])
>   ls 14753 [011]  3678.072400:          1    l1d-access:         88000182 L1 miss|SNP N/A|TLB Walker hit|LCK No|BLK  N/A ffffa7c22b4b2a00 [unknown] ([kernel.kallsyms])
>   ls 14753 [011]  3678.072400:          1    tlb-access:         88000182 L1 miss|SNP N/A|TLB Walker hit|LCK No|BLK  N/A ffffa7c22b4b2a00 [unknown] ([kernel.kallsyms])
>   ls 14753 [011]  3678.072400:          1        memory:         88000182 L1 miss|SNP N/A|TLB Walker hit|LCK No|BLK  N/A ffffa7c22b4b2a00 [unknown] ([kernel.kallsyms])
> 
> After:
> 
>   ls 14753 [011]  3678.072400:          1      l1d-miss:         88000182 |OP LOAD|LVL L1 miss|SNP N/A|TLB Walker hit|LCK No|BLK  N/A ffffa7c22b4b2a00 [unknown] ([kernel.kallsyms])
>   ls 14753 [011]  3678.072400:          1    l1d-access:         88000182 |OP LOAD|LVL L1 miss|SNP N/A|TLB Walker hit|LCK No|BLK  N/A ffffa7c22b4b2a00 [unknown] ([kernel.kallsyms])
>   ls 14753 [011]  3678.072400:          1    tlb-access:         88000182 |OP LOAD|LVL L1 miss|SNP N/A|TLB Walker hit|LCK No|BLK  N/A ffffa7c22b4b2a00 [unknown] ([kernel.kallsyms])
>   ls 14753 [011]  3678.072400:          1        memory:         88000182 |OP LOAD|LVL L1 miss|SNP N/A|TLB Walker hit|LCK No|BLK  N/A ffffa7c22b4b2a00 [unknown] ([kernel.kallsyms])

Thanks, applied to perf/core.

- Arnaldo

 
> Signed-off-by: Leo Yan <leo.yan@...aro.org>
> ---
>  tools/perf/util/mem-events.c | 29 ++++++++++++++++++++++++++++-
>  1 file changed, 28 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
> index e5e405185498..f8f234251f92 100644
> --- a/tools/perf/util/mem-events.c
> +++ b/tools/perf/util/mem-events.c
> @@ -314,6 +314,30 @@ static const char * const mem_hops[] = {
>  	"board",
>  };
>  
> +static int perf_mem__op_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
> +{
> +	u64 op = PERF_MEM_LOCK_NA;
> +	int l;
> +
> +	if (mem_info)
> +		op = mem_info->data_src.mem_op;
> +
> +	if (op & PERF_MEM_OP_NA)
> +		l = scnprintf(out, sz, "N/A");
> +	else if (op & PERF_MEM_OP_LOAD)
> +		l = scnprintf(out, sz, "LOAD");
> +	else if (op & PERF_MEM_OP_STORE)
> +		l = scnprintf(out, sz, "STORE");
> +	else if (op & PERF_MEM_OP_PFETCH)
> +		l = scnprintf(out, sz, "PFETCH");
> +	else if (op & PERF_MEM_OP_EXEC)
> +		l = scnprintf(out, sz, "EXEC");
> +	else
> +		l = scnprintf(out, sz, "No");
> +
> +	return l;
> +}
> +
>  int perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
>  {
>  	size_t i, l = 0;
> @@ -466,7 +490,10 @@ int perf_script__meminfo_scnprintf(char *out, size_t sz, struct mem_info *mem_in
>  {
>  	int i = 0;
>  
> -	i += perf_mem__lvl_scnprintf(out, sz, mem_info);
> +	i += scnprintf(out, sz, "|OP ");
> +	i += perf_mem__op_scnprintf(out + i, sz - i, mem_info);
> +	i += scnprintf(out + i, sz - i, "|LVL ");
> +	i += perf_mem__lvl_scnprintf(out + i, sz, mem_info);
>  	i += scnprintf(out + i, sz - i, "|SNP ");
>  	i += perf_mem__snp_scnprintf(out + i, sz - i, mem_info);
>  	i += scnprintf(out + i, sz - i, "|TLB ");
> -- 
> 2.25.1

-- 

- Arnaldo