Re: [PATCH 49/57] perf c2c report: Limit the cachelines table entries

From: Arnaldo Carvalho de Melo
Date: Mon Oct 10 2016 - 16:01:34 EST


Em Thu, Sep 22, 2016 at 05:37:17PM +0200, Jiri Olsa escreveu:
> Add a limit for entries number of the cachelines table
> entries. By default now it's the 0.0005% minimum of
> remote HITMs.
>
> Also display only cachelines with remote hitm or store data.

Humm, this made my test machine, which has just one CPU, to show nothing
:-\

I think we need to have a command line switch to control this?

I'm leaving this patch for later.

- Arnaldo

> Link: http://lkml.kernel.org/n/tip-inykbom2f19difvsu1e18avr@xxxxxxxxxxxxxx
> Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
> ---
> tools/perf/builtin-c2c.c | 36 ++++++++++++++++++++++++++++++++++--
> tools/perf/util/hist.c | 1 +
> tools/perf/util/hist.h | 1 +
> 3 files changed, 36 insertions(+), 2 deletions(-)
>
> diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
> index 31e311959480..ff89c0b86c44 100644
> --- a/tools/perf/builtin-c2c.c
> +++ b/tools/perf/builtin-c2c.c
> @@ -1639,11 +1639,42 @@ static int c2c_hists__reinit(struct c2c_hists *c2c_hists,
> return hpp_list__parse(&c2c_hists->list, output, sort);
> }
>
> -static int filter_cb(struct hist_entry *he __maybe_unused)
> +#define DISPLAY_LINE_LIMIT 0.0005
> +
> +static bool he__display(struct hist_entry *he, struct c2c_stats *stats)
> +{
> + struct c2c_hist_entry *c2c_he;
> + double ld_dist;
> +
> + c2c_he = container_of(he, struct c2c_hist_entry, he);
> +
> + if (stats->rmt_hitm) {
> + ld_dist = ((double)c2c_he->stats.rmt_hitm / stats->rmt_hitm);
> + if (ld_dist < DISPLAY_LINE_LIMIT)
> + he->filtered = HIST_FILTER__C2C;
> + } else {
> + he->filtered = HIST_FILTER__C2C;
> + }
> +
> + return he->filtered == 0;
> +}
> +
> +static inline int valid_hitm_or_store(struct hist_entry *he)
> +{
> + struct c2c_hist_entry *c2c_he;
> +
> + c2c_he = container_of(he, struct c2c_hist_entry, he);
> + return c2c_he->stats.rmt_hitm || c2c_he->stats.store;
> +}
> +
> +static int filter_cb(struct hist_entry *he)
> {
> if (c2c.show_src && !he->srcline)
> he->srcline = hist_entry__get_srcline(he);
>
> + if (!valid_hitm_or_store(he))
> + he->filtered = HIST_FILTER__C2C;
> +
> return 0;
> }
>
> @@ -1651,11 +1682,12 @@ static int resort_cl_cb(struct hist_entry *he)
> {
> struct c2c_hist_entry *c2c_he;
> struct c2c_hists *c2c_hists;
> + bool display = he__display(he, &c2c.hitm_stats);
>
> c2c_he = container_of(he, struct c2c_hist_entry, he);
> c2c_hists = c2c_he->hists;
>
> - if (c2c_hists) {
> + if (display && c2c_hists) {
> c2c_hists__reinit(c2c_hists,
> "percent_rmt_hitm,"
> "percent_lcl_hitm,"
> diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
> index b02992efb513..e1be4132054d 100644
> --- a/tools/perf/util/hist.c
> +++ b/tools/perf/util/hist.c
> @@ -1195,6 +1195,7 @@ static void hist_entry__check_and_remove_filter(struct hist_entry *he,
> case HIST_FILTER__GUEST:
> case HIST_FILTER__HOST:
> case HIST_FILTER__SOCKET:
> + case HIST_FILTER__C2C:
> default:
> return;
> }
> diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
> index 9928fed8bc59..d4b6514eeef5 100644
> --- a/tools/perf/util/hist.h
> +++ b/tools/perf/util/hist.h
> @@ -22,6 +22,7 @@ enum hist_filter {
> HIST_FILTER__GUEST,
> HIST_FILTER__HOST,
> HIST_FILTER__SOCKET,
> + HIST_FILTER__C2C,
> };
>
> enum hist_column {
> --
> 2.7.4