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Date: Fri, 8 Mar 2019 10:47:54 -0300
From: Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To: Andi Kleen <andi@...stfloor.org>
Cc: Feng Tang <feng.tang@...el.com>, jolsa@...nel.org,
namhyung@...nel.org, linux-kernel@...r.kernel.org,
linux-perf-users@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH v4 07/15] perf tools report: Use less for scripts output
Em Tue, Mar 05, 2019 at 06:47:50AM -0800, Andi Kleen escreveu:
> From: Andi Kleen <ak@...ux.intel.com>
>
> The UI viewer for scripts output has a lot of limitations: limited size,
> no search or save function, slow, and various other issues.
>
> Just use 'less' to display directly on the terminal instead.
I'm ok with this, CCing Feng tho since he contributed this browser, to
let him know.
- Arnaldo
> This won't work in gtk mode, but gtk doesn't support these
> context menus anyways. If that is ever done could use an terminal
> for the output.
>
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
>
> ---
>
> v2:
> Remove some unneeded headers
> ---
> tools/perf/ui/browsers/scripts.c | 130 ++++---------------------------
> 1 file changed, 17 insertions(+), 113 deletions(-)
>
> diff --git a/tools/perf/ui/browsers/scripts.c b/tools/perf/ui/browsers/scripts.c
> index 90a32ac69e76..7f36630694bf 100644
> --- a/tools/perf/ui/browsers/scripts.c
> +++ b/tools/perf/ui/browsers/scripts.c
> @@ -1,35 +1,12 @@
> // SPDX-License-Identifier: GPL-2.0
> -#include <elf.h>
> -#include <inttypes.h>
> -#include <sys/ttydefaults.h>
> -#include <string.h>
> #include "../../util/sort.h"
> #include "../../util/util.h"
> #include "../../util/hist.h"
> #include "../../util/debug.h"
> #include "../../util/symbol.h"
> #include "../browser.h"
> -#include "../helpline.h"
> #include "../libslang.h"
>
> -/* 2048 lines should be enough for a script output */
> -#define MAX_LINES 2048
> -
> -/* 160 bytes for one output line */
> -#define AVERAGE_LINE_LEN 160
> -
> -struct script_line {
> - struct list_head node;
> - char line[AVERAGE_LINE_LEN];
> -};
> -
> -struct perf_script_browser {
> - struct ui_browser b;
> - struct list_head entries;
> - const char *script_name;
> - int nr_lines;
> -};
> -
> #define SCRIPT_NAMELEN 128
> #define SCRIPT_MAX_NO 64
> /*
> @@ -73,69 +50,29 @@ static int list_scripts(char *script_name)
> return ret;
> }
>
> -static void script_browser__write(struct ui_browser *browser,
> - void *entry, int row)
> +static void run_script(char *cmd)
> {
> - struct script_line *sline = list_entry(entry, struct script_line, node);
> - bool current_entry = ui_browser__is_current_entry(browser, row);
> -
> - ui_browser__set_color(browser, current_entry ? HE_COLORSET_SELECTED :
> - HE_COLORSET_NORMAL);
> -
> - ui_browser__write_nstring(browser, sline->line, browser->width);
> + pr_debug("Running %s\n", cmd);
> + SLang_reset_tty();
> + if (system(cmd) < 0)
> + pr_warning("Cannot run %s\n", cmd);
> + /*
> + * SLang doesn't seem to reset the whole terminal, so be more
> + * forceful to get back to the original state.
> + */
> + printf("\033[c\033[H\033[J");
> + fflush(stdout);
> + SLang_init_tty(0, 0, 0);
> + SLsmg_refresh();
> }
>
> -static int script_browser__run(struct perf_script_browser *browser)
> -{
> - int key;
> -
> - if (ui_browser__show(&browser->b, browser->script_name,
> - "Press ESC to exit") < 0)
> - return -1;
> -
> - while (1) {
> - key = ui_browser__run(&browser->b, 0);
> -
> - /* We can add some special key handling here if needed */
> - break;
> - }
> -
> - ui_browser__hide(&browser->b);
> - return key;
> -}
> -
> -
> int script_browse(const char *script_opt)
> {
> char cmd[SCRIPT_FULLPATH_LEN*2], script_name[SCRIPT_FULLPATH_LEN];
> - char *line = NULL;
> - size_t len = 0;
> - ssize_t retlen;
> - int ret = -1, nr_entries = 0;
> - FILE *fp;
> - void *buf;
> - struct script_line *sline;
> -
> - struct perf_script_browser script = {
> - .b = {
> - .refresh = ui_browser__list_head_refresh,
> - .seek = ui_browser__list_head_seek,
> - .write = script_browser__write,
> - },
> - .script_name = script_name,
> - };
> -
> - INIT_LIST_HEAD(&script.entries);
> -
> - /* Save each line of the output in one struct script_line object. */
> - buf = zalloc((sizeof(*sline)) * MAX_LINES);
> - if (!buf)
> - return -1;
> - sline = buf;
>
> memset(script_name, 0, SCRIPT_FULLPATH_LEN);
> if (list_scripts(script_name))
> - goto exit;
> + return -1;
>
> sprintf(cmd, "perf script -s %s ", script_name);
>
> @@ -147,42 +84,9 @@ int script_browse(const char *script_opt)
> strcat(cmd, input_name);
> }
>
> - strcat(cmd, " 2>&1");
> -
> - fp = popen(cmd, "r");
> - if (!fp)
> - goto exit;
> -
> - while ((retlen = getline(&line, &len, fp)) != -1) {
> - strncpy(sline->line, line, AVERAGE_LINE_LEN);
> -
> - /* If one output line is very large, just cut it short */
> - if (retlen >= AVERAGE_LINE_LEN) {
> - sline->line[AVERAGE_LINE_LEN - 1] = '\0';
> - sline->line[AVERAGE_LINE_LEN - 2] = '\n';
> - }
> - list_add_tail(&sline->node, &script.entries);
> -
> - if (script.b.width < retlen)
> - script.b.width = retlen;
> -
> - if (nr_entries++ >= MAX_LINES - 1)
> - break;
> - sline++;
> - }
> -
> - if (script.b.width > AVERAGE_LINE_LEN)
> - script.b.width = AVERAGE_LINE_LEN;
> -
> - free(line);
> - pclose(fp);
> + strcat(cmd, " 2>&1 | less");
>
> - script.nr_lines = nr_entries;
> - script.b.nr_entries = nr_entries;
> - script.b.entries = &script.entries;
> + run_script(cmd);
>
> - ret = script_browser__run(&script);
> -exit:
> - free(buf);
> - return ret;
> + return 0;
> }
> --
> 2.20.1
--
- Arnaldo
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