Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757474AbaGNVsL (ORCPT ); Mon, 14 Jul 2014 17:48:11 -0400 Received: from mx1.redhat.com ([209.132.183.28]:27898 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757391AbaGNVrQ (ORCPT ); Mon, 14 Jul 2014 17:47:16 -0400 From: Jiri Olsa To: linux-kernel@vger.kernel.org Cc: Jiri Olsa , Arnaldo Carvalho de Melo , Corey Ashford , David Ahern , Frederic Weisbecker , Ingo Molnar , Namhyung Kim , Paul Mackerras , Peter Zijlstra Subject: [PATCH 4/5] perf tools: Add --debug optionto set debug variable Date: Mon, 14 Jul 2014 23:46:50 +0200 Message-Id: <1405374411-29012-5-git-send-email-jolsa@kernel.org> In-Reply-To: <1405374411-29012-1-git-send-email-jolsa@kernel.org> References: <1405374411-29012-1-git-send-email-jolsa@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adding --debug option as a way to setup debug variables. Starting with support for verbose, more will come. It's possible to use it now with report command: $ perf --debug verbose ... $ perf --debug verbose=2 ... I'll need this support to add separated debug variable for ordered events change in order to separate debug output out of standard verbose stream. Cc: Arnaldo Carvalho de Melo Cc: Corey Ashford Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Signed-off-by: Jiri Olsa --- tools/perf/Documentation/perf-report.txt | 6 +++++ tools/perf/Documentation/perf.txt | 10 +++++++- tools/perf/perf.c | 13 +++++++++- tools/perf/util/debug.c | 44 ++++++++++++++++++++++++++++++++ tools/perf/util/debug.h | 2 ++ 5 files changed, 73 insertions(+), 2 deletions(-) diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt index d2b59af62bc0..53b6ad8e4d4d 100644 --- a/tools/perf/Documentation/perf-report.txt +++ b/tools/perf/Documentation/perf-report.txt @@ -25,6 +25,12 @@ OPTIONS --verbose:: Be more verbose. (show symbol address, etc) +--debug:: + Setup debug variable (just verbose for now) in value + range (0, 10). Use like: + --debug verbose # sets verbose = 1 + --debug verbose=2 # sets verbose = 2 + -n:: --show-nr-samples:: Show the number of samples for each symbol diff --git a/tools/perf/Documentation/perf.txt b/tools/perf/Documentation/perf.txt index 0eeb247dc7d2..c75a42822c53 100644 --- a/tools/perf/Documentation/perf.txt +++ b/tools/perf/Documentation/perf.txt @@ -8,7 +8,15 @@ perf - Performance analysis tools for Linux SYNOPSIS -------- [verse] -'perf' [--version] [--help] COMMAND [ARGS] +'perf' [--version] [--debug variable[=VALUE]] [--help] COMMAND [ARGS] + +OPTIONS +------- +--debug:: + Setup debug variable (just verbose for now) in value + range (0, 10). Use like: + --debug verbose # sets verbose = 1 + --debug verbose=2 # sets verbose = 2 DESCRIPTION ----------- diff --git a/tools/perf/perf.c b/tools/perf/perf.c index 95c58fc15284..eed3fb2a3af0 100644 --- a/tools/perf/perf.c +++ b/tools/perf/perf.c @@ -13,11 +13,12 @@ #include "util/quote.h" #include "util/run-command.h" #include "util/parse-events.h" +#include "util/debug.h" #include #include const char perf_usage_string[] = - "perf [--version] [--help] COMMAND [ARGS]"; + "perf [--version] [--debug variable[=VALUE]] [--help] COMMAND [ARGS]"; const char perf_more_info_string[] = "See 'perf help COMMAND' for more information on a specific command."; @@ -212,6 +213,16 @@ static int handle_options(const char ***argv, int *argc, int *envchanged) printf("%s ", p->cmd); } exit(0); + } else if (!strcmp(cmd, "--debug")) { + if (*argc < 2) { + fprintf(stderr, "No variable specified for --debug.\n"); + usage(perf_usage_string); + } + if (perf_debug_option((*argv)[1])) + usage(perf_usage_string); + + (*argv)++; + (*argc)--; } else { fprintf(stderr, "Unknown option: %s\n", cmd); usage(perf_usage_string); diff --git a/tools/perf/util/debug.c b/tools/perf/util/debug.c index c208d6f56e63..71d419362634 100644 --- a/tools/perf/util/debug.c +++ b/tools/perf/util/debug.c @@ -105,3 +105,47 @@ void trace_event(union perf_event *event) } printf(".\n"); } + +static struct debug_variable { + const char *name; + int *ptr; +} debug_variables[] = { + { .name = "verbose", .ptr = &verbose }, + { .name = NULL, } +}; + +int perf_debug_option(const char *str) +{ + struct debug_variable *var = &debug_variables[0]; + char *vstr, *s = strdup(str); + int v = 1; + + vstr = strchr(s, '='); + if (vstr) + *vstr++ = 0; + + while (var->name) { + if (!strcmp(s, var->name)) + break; + var++; + } + + if (!var->name) { + pr_err("Unknown debug variable name '%s'\n", s); + free(s); + return -1; + } + + if (vstr) { + v = atoi(vstr); + /* + * Allow only values in range (0, 10), + * otherwise set 0. + */ + v = (v < 0) || (v > 10) ? 0 : v; + } + + *var->ptr = v; + free(s); + return 0; +} diff --git a/tools/perf/util/debug.h b/tools/perf/util/debug.h index 1cb808123242..89fb6b0f7ab2 100644 --- a/tools/perf/util/debug.h +++ b/tools/perf/util/debug.h @@ -39,4 +39,6 @@ void pr_stat(const char *fmt, ...); int eprintf(int level, int var, const char *fmt, ...) __attribute__((format(printf, 3, 4))); +int perf_debug_option(const char *str); + #endif /* __PERF_DEBUG_H */ -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/