Re: [PATCH v2 6/6] perf c2c: print memory region data with stdio output

[Namhyung Kim <namhyung@kernel.org>]

On Mon, Jul 13, 2026 at 07:43:59PM -0500, Thomas Falcon wrote:
> Print memory range data in perf-c2c subcommand. Only available in stdio
> mode currently. If memory ranges are not supported or present, print
> nothing.

Can you please add an example output?

Thanks,
Namhyung

> 
> Assisted-by: Sashiko:gemini-3.1-pro-preview
> Signed-off-by: Thomas Falcon <thomas.falcon@intel.com>
> ---
>  tools/perf/builtin-c2c.c | 30 ++++++++++++++++++++++++++++++
>  1 file changed, 30 insertions(+)
> 
> diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
> index cba2e9f21ae7..68348a93bd33 100644
> --- a/tools/perf/builtin-c2c.c
> +++ b/tools/perf/builtin-c2c.c
> @@ -2634,6 +2634,34 @@ static void print_c2c_info(FILE *out, struct perf_session *session)
>  	fprintf(out, "  Cacheline data grouping           : %s\n", c2c.cl_sort);
>  }
>  
> +
> +static void print_memory_ranges_info(FILE *out, struct perf_session *session)
> +{
> +	struct perf_env *env = perf_session__env(session);
> +	int nr_ranges = 0;
> +
> +	if (!perf_header__has_feat(&session->header, HEADER_MEMORY_RANGES))
> +		return;
> +	nr_ranges = env->nr_memory_ranges;
> +	if (nr_ranges == 0) {
> +		pr_debug("No memory ranges found, skipping\n");
> +		return;
> +	}
> +
> +	fprintf(out, "\n");
> +	fprintf(out, "=================================================\n");
> +	fprintf(out, "                  Memory Ranges                  \n");
> +	fprintf(out, "=================================================\n");
> +
> +	for (int i = 0; i < nr_ranges; i++) {
> +		struct memory_range *r = &env->memory_ranges[i];
> +
> +		fprintf(out, "Range %d: [0x%016" PRIx64 "-0x%016" PRIx64 "] Node %d, local region id %u, remote region id %u\n",
> +			i, r->base, r->base + r->length - 1, r->node,
> +			r->local_region_id, r->remote_region_id);
> +	}
> +}
> +
>  static void perf_c2c__hists_fprintf(FILE *out, struct perf_session *session)
>  {
>  	setup_pager();
> @@ -2647,6 +2675,8 @@ static void perf_c2c__hists_fprintf(FILE *out, struct perf_session *session)
>  	if (c2c.stats_only)
>  		return;
>  
> +	print_memory_ranges_info(out, session);
> +
>  	fprintf(out, "\n");
>  	fprintf(out, "=================================================\n");
>  	fprintf(out, "           Shared Data Cache Line Table          \n");
> -- 
> 2.43.0
>