linux-kernel - Re: [PATCH v7 7/7] perf report: Sort by sampled cycles percent per block for tui

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Date:   Thu, 7 Nov 2019 09:38:02 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Jin Yao <yao.jin@...ux.intel.com>
Cc:     jolsa@...nel.org, peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, Linux-kernel@...r.kernel.org,
        ak@...ux.intel.com, kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v7 7/7] perf report: Sort by sampled cycles percent per
 block for tui

I prefer that all the browsers be in tools/perf/ui/browsers, but won't,
ho-hum, block this patch because of that, we can fix that later, and
don't need to hurry, I have patches that touch 'struct map'/'struct
addr_location', that I'll have to fixup to account for this, so its
better to fix anything here after I get my work merged,

Thanks a lot for this new feature, it looks awesome!

To further clarify: I've applied everything and also test it, very good
so far, we can fix things we find later, now going thru tests on my
build farm.

Thanks Jiri for all the reviewing, appreciated, as usual,

- Arnaldo
 
> +++ b/tools/perf/util/block-info.c
> @@ -10,6 +10,7 @@
>  #include "map.h"
>  #include "srcline.h"
>  #include "evlist.h"
> +#include "ui/browsers/hists.h"
>  
>  static struct block_header_column{
>  	const char *name;
> @@ -445,9 +446,75 @@ struct block_report *block_info__create_report(struct evlist *evlist,
>  	return block_reports;
>  }
>  
> +#ifdef HAVE_SLANG_SUPPORT
> +static int block_hists_browser__title(struct hist_browser *browser, char *bf,
> +				      size_t size)
> +{
> +	struct hists *hists = evsel__hists(browser->block_evsel);
> +	const char *evname = perf_evsel__name(browser->block_evsel);
> +	unsigned long nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE];
> +	int ret;
> +
> +	ret = scnprintf(bf, size, "# Samples: %lu", nr_samples);
> +	if (evname)
> +		scnprintf(bf + ret, size -  ret, " of event '%s'", evname);
> +
> +	return 0;
> +}
> +
> +static int block_hists_tui_browse(struct block_hist *bh, struct evsel *evsel,
> +				  float min_percent)
> +{
> +	struct hists *hists = &bh->block_hists;
> +	struct hist_browser *browser;
> +	int key = -1;
> +	static const char help[] =
> +	" q             Quit \n";
> +
> +	browser = hist_browser__new(hists);
> +	if (!browser)
> +		return -1;
> +
> +	browser->block_evsel = evsel;
> +	browser->title = block_hists_browser__title;
> +	browser->min_pcnt = min_percent;
> +
> +	/* reset abort key so that it can get Ctrl-C as a key */
> +	SLang_reset_tty();
> +	SLang_init_tty(0, 0, 0);
> +
> +	while (1) {
> +		key = hist_browser__run(browser, "? - help", true);
> +
> +		switch (key) {
> +		case 'q':
> +			goto out;
> +		case '?':
> +			ui_browser__help_window(&browser->b, help);
> +			break;
> +		default:
> +			break;
> +		}
> +	}
> +
> +out:
> +	hist_browser__delete(browser);
> +	return 0;
> +}
> +#else
> +static int block_hists_tui_browse(struct block_hist *bh __maybe_unused,
> +				  struct evsel *evsel __maybe_unused,
> +				  float min_percent __maybe_unused)
> +{
> +	return 0;
> +}
> +#endif
> +
>  int report__browse_block_hists(struct block_hist *bh, float min_percent,
> -			       struct evsel *evsel __maybe_unused)
> +			       struct evsel *evsel)
>  {
> +	int ret;
> +
>  	switch (use_browser) {
>  	case 0:
>  		symbol_conf.report_individual_block = true;
> @@ -455,6 +522,11 @@ int report__browse_block_hists(struct block_hist *bh, float min_percent,
>  			       stdout, true);
>  		hists__delete_entries(&bh->block_hists);
>  		return 0;
> +	case 1:
> +		symbol_conf.report_individual_block = true;
> +		ret = block_hists_tui_browse(bh, evsel, min_percent);
> +		hists__delete_entries(&bh->block_hists);
> +		return ret;
>  	default:
>  		return -1;
>  	}
> -- 
> 2.17.1

-- 

- Arnaldo