Re: [PATCH v5 3/4] perf, tools: Add support for printing new mem_info encodings

[Jiri Olsa]

On Wed, Aug 16, 2017 at 03:21:55PM -0700, Andi Kleen wrote:

SNIP

>  int perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
>  {
>       size_t i, l = 0;
>       u64 m =  PERF_MEM_LVL_NA;
>       u64 hit, miss;
> +     int printed;
>  
>       if (mem_info)
>               m  = mem_info->data_src.mem_lvl;
> @@ -184,17 +193,37 @@ int perf_mem__lvl_scnprintf(char *out, size_t sz, 
> struct mem_info *mem_info)
>       /* already taken care of */
>       m &= ~(PERF_MEM_LVL_HIT|PERF_MEM_LVL_MISS);
>  
> +
> +     if (mem_info && mem_info->data_src.mem_remote) {
> +             strcat(out, "Remote ");
> +             l += 7;
> +     }

Andi,
how is this 'Remote' different from the remote levels in mem_lvl?

        "Remote RAM (1 hop)",
        "Remote RAM (2 hops)",
        "Remote Cache (1 hop)",
        "Remote Cache (2 hops)",

thanks,
jirka

> +
> +     printed = 0;
>       for (i = 0; m && i < ARRAY_SIZE(mem_lvl); i++, m >>= 1) {
>               if (!(m & 0x1))
>                       continue;
> -             if (l) {
> +             if (printed++) {
>                       strcat(out, " or ");
>                       l += 4;
>               }
>               l += scnprintf(out + l, sz - l, mem_lvl[i]);
>       }
> -     if (*out == '\0')
> -             l += scnprintf(out, sz - l, "N/A");
> +
> +     if (mem_info && mem_info->data_src.mem_lvl_num) {
> +             int lvl = mem_info->data_src.mem_lvl_num;
> +             if (printed++) {
> +                     strcat(out, " or ");
> +                     l += 4;
> +             }
> +             if (mem_lvlnum[lvl])
> +                     l += scnprintf(out + l, sz - l, mem_lvlnum[lvl]);
> +             else
> +                     l += scnprintf(out + l, sz - l, "L%d", lvl);
> +     }