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Date:   Tue, 21 Feb 2017 10:38:27 +0900
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Jiri Olsa <jolsa@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, kernel-team@....com
Subject: Re: [PATCH 2/6] perf utils: Check verbose flag properly

Hi Arnaldo,

On Mon, Feb 20, 2017 at 11:35:44AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Fri, Feb 17, 2017 at 05:17:38PM +0900, Namhyung Kim escreveu:
> > It now can have negative value to suppress the message entirely.  So it
> > needs to check it being positive.
> 
> find tools/perf -name "*.[chly]" | xargs grep -w verbose 
> 
> Shows several other places, I'm trying to plug those, fixed it up in
> your patch and left a committer note, please check and see if all is
> right.

Looks ok to me.  But most of them are part of builtin commands so it
should be added with -q option.  I'll cook a patchset for them.

Thanks,
Namhyung


> 
> - Arnaldo
> 
> diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
> index 70a289347591..7ad0d78ea743 100644
> --- a/tools/perf/builtin-diff.c
> +++ b/tools/perf/builtin-diff.c
> @@ -744,7 +744,7 @@ static void data_process(void)
>  
>  		first = false;
>  
> -		if (verbose || data__files_cnt > 2)
> +		if (verbose > 0 || data__files_cnt > 2)
>  			data__fprintf();
>  
>  		/* Don't sort callchain for perf diff */
> diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
> index cd7bc4d104e2..6114e07ca613 100644
> --- a/tools/perf/builtin-mem.c
> +++ b/tools/perf/builtin-mem.c
> @@ -42,8 +42,8 @@ static int parse_record_events(const struct option *opt,
>  
>  		fprintf(stderr, "%-13s%-*s%s\n",
>  			e->tag,
> -			verbose ? 25 : 0,
> -			verbose ? perf_mem_events__name(j) : "",
> +			verbose > 0 ? 25 : 0,
> +			verbose > 0 ? perf_mem_events__name(j) : "",
>  			e->supported ? ": available" : "");
>  	}
>  	exit(0);
> diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
> index b87bbef73394..451b11e35c26 100644
> --- a/tools/perf/builtin-record.c
> +++ b/tools/perf/builtin-record.c
> @@ -432,7 +432,7 @@ static int record__open(struct record *rec)
>  try_again:
>  		if (perf_evsel__open(pos, pos->cpus, pos->threads) < 0) {
>  			if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) {
> -				if (verbose)
> +				if (verbose > 0)
>  					ui__warning("%s\n", msg);
>  				goto try_again;
>  			}
> diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> index dbd7fa028861..a94488114bbf 100644
> --- a/tools/perf/builtin-report.c
> +++ b/tools/perf/builtin-report.c
> @@ -1009,7 +1009,7 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
>   		 * providing it only in verbose mode not to bloat too
>   		 * much struct symbol.
>   		 */
> -		if (verbose) {
> +		if (verbose > 0) {
>  			/*
>  			 * XXX: Need to provide a less kludgy way to ask for
>  			 * more space per symbol, the u32 is for the index on
> diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
> index 270eb2d8ca6b..b94cf0de715a 100644
> --- a/tools/perf/builtin-sched.c
> +++ b/tools/perf/builtin-sched.c
> @@ -460,7 +460,7 @@ static struct task_desc *register_pid(struct perf_sched *sched,
>  	BUG_ON(!sched->tasks);
>  	sched->tasks[task->nr] = task;
>  
> -	if (verbose)
> +	if (verbose > 0)
>  		printf("registered task #%ld, PID %ld (%s)\n", sched->nr_tasks, pid, comm);
>  
>  	return task;
> @@ -794,7 +794,7 @@ replay_wakeup_event(struct perf_sched *sched,
>  	const u32 pid	 = perf_evsel__intval(evsel, sample, "pid");
>  	struct task_desc *waker, *wakee;
>  
> -	if (verbose) {
> +	if (verbose > 0) {
>  		printf("sched_wakeup event %p\n", evsel);
>  
>  		printf(" ... pid %d woke up %s/%d\n", sample->tid, comm, pid);
> @@ -822,7 +822,7 @@ static int replay_switch_event(struct perf_sched *sched,
>  	int cpu = sample->cpu;
>  	s64 delta;
>  
> -	if (verbose)
> +	if (verbose > 0)
>  		printf("sched_switch event %p\n", evsel);
>  
>  	if (cpu >= MAX_CPUS || cpu < 0)
> @@ -870,7 +870,7 @@ static int replay_fork_event(struct perf_sched *sched,
>  		goto out_put;
>  	}
>  
> -	if (verbose) {
> +	if (verbose > 0) {
>  		printf("fork event\n");
>  		printf("... parent: %s/%d\n", thread__comm_str(parent), parent->tid);
>  		printf("...  child: %s/%d\n", thread__comm_str(child), child->tid);
> @@ -1573,7 +1573,7 @@ static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
>  
>  	timestamp__scnprintf_usec(timestamp, stimestamp, sizeof(stimestamp));
>  	color_fprintf(stdout, color, "  %12s secs ", stimestamp);
> -	if (new_shortname || (verbose && sched_in->tid)) {
> +	if (new_shortname || (verbose > 0 && sched_in->tid)) {
>  		const char *pid_color = color;
>  
>  		if (thread__has_color(sched_in))
> @@ -2050,7 +2050,7 @@ static void save_task_callchain(struct perf_sched *sched,
>  
>  	if (thread__resolve_callchain(thread, cursor, evsel, sample,
>  				      NULL, NULL, sched->max_stack + 2) != 0) {
> -		if (verbose)
> +		if (verbose > 0)
>  			error("Failed to resolve callchain. Skipping\n");
>  
>  		return;
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index 9989b03c21f2..13b54999ad79 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -573,7 +573,7 @@ static int __run_perf_stat(int argc, const char **argv)
>  			if (errno == EINVAL || errno == ENOSYS ||
>  			    errno == ENOENT || errno == EOPNOTSUPP ||
>  			    errno == ENXIO) {
> -				if (verbose)
> +				if (verbose > 0)
>  					ui__warning("%s event is not supported by the kernel.\n",
>  						    perf_evsel__name(counter));
>  				counter->supported = false;
> @@ -582,7 +582,7 @@ static int __run_perf_stat(int argc, const char **argv)
>  				    !(counter->leader->nr_members > 1))
>  					continue;
>  			} else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
> -                                if (verbose)
> +                                if (verbose > 0)
>                                          ui__warning("%s\n", msg);
>                                  goto try_again;
>                          }
> @@ -2539,7 +2539,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
>  
>  	status = 0;
>  	for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
> -		if (run_count != 1 && verbose)
> +		if (run_count != 1 && verbose > 0)
>  			fprintf(output, "[ perf stat: executing run #%d ... ]\n",
>  				run_idx + 1);
>  
> diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
> index 5a7fd7af3a6d..ab9077915763 100644
> --- a/tools/perf/builtin-top.c
> +++ b/tools/perf/builtin-top.c
> @@ -871,7 +871,7 @@ static int perf_top__start_counters(struct perf_top *top)
>  		if (perf_evsel__open(counter, top->evlist->cpus,
>  				     top->evlist->threads) < 0) {
>  			if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
> -				if (verbose)
> +				if (verbose > 0)
>  					ui__warning("%s\n", msg);
>  				goto try_again;
>  			}
> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index 40ef9b293d1b..256f1fac6f7e 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -1399,7 +1399,7 @@ static struct syscall *trace__syscall_info(struct trace *trace,
>  	return &trace->syscalls.table[id];
>  
>  out_cant_read:
> -	if (verbose) {
> +	if (verbose > 0) {
>  		fprintf(trace->output, "Problems reading syscall %d", id);
>  		if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL)
>  			fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
> @@ -1801,10 +1801,10 @@ static void print_location(FILE *f, struct perf_sample *sample,
>  			   bool print_dso, bool print_sym)
>  {
>  
> -	if ((verbose || print_dso) && al->map)
> +	if ((verbose > 0 || print_dso) && al->map)
>  		fprintf(f, "%s@", al->map->dso->long_name);
>  
> -	if ((verbose || print_sym) && al->sym)
> +	if ((verbose > 0 || print_sym) && al->sym)
>  		fprintf(f, "%s+0x%" PRIx64, al->sym->name,
>  			al->addr - al->sym->start);
>  	else if (al->map)
> diff --git a/tools/perf/pmu-events/json.c b/tools/perf/pmu-events/json.c
> index f67bbb0aa36e..0544398d6e2d 100644
> --- a/tools/perf/pmu-events/json.c
> +++ b/tools/perf/pmu-events/json.c
> @@ -49,7 +49,7 @@ static char *mapfile(const char *fn, size_t *size)
>  	int err;
>  	int fd = open(fn, O_RDONLY);
>  
> -	if (fd < 0 && verbose && fn) {
> +	if (fd < 0 && verbose > 0 && fn) {
>  		pr_err("Error opening events file '%s': %s\n", fn,
>  				strerror(errno));
>  	}
> diff --git a/tools/perf/tests/attr.c b/tools/perf/tests/attr.c
> index 28d1605b0338..88dc51f4c27b 100644
> --- a/tools/perf/tests/attr.c
> +++ b/tools/perf/tests/attr.c
> @@ -144,7 +144,7 @@ static int run_dir(const char *d, const char *perf)
>  	int vcnt = min(verbose, (int) sizeof(v) - 1);
>  	char cmd[3*PATH_MAX];
>  
> -	if (verbose)
> +	if (verbose > 0)
>  		vcnt++;
>  
>  	snprintf(cmd, 3*PATH_MAX, PYTHON " %s/attr.py -d %s/attr/ -p %s %.*s",
> diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
> index 37e326bfd2dc..83c4669cbc5b 100644
> --- a/tools/perf/tests/builtin-test.c
> +++ b/tools/perf/tests/builtin-test.c
> @@ -299,7 +299,7 @@ static int run_test(struct test *test, int subtest)
>  		if (!dont_fork) {
>  			pr_debug("test child forked, pid %d\n", getpid());
>  
> -			if (!verbose) {
> +			if (verbose <= 0) {
>  				int nullfd = open("/dev/null", O_WRONLY);
>  
>  				if (nullfd >= 0) {
> diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
> index ff5bc6363a79..d1f693041324 100644
> --- a/tools/perf/tests/code-reading.c
> +++ b/tools/perf/tests/code-reading.c
> @@ -599,7 +599,7 @@ static int do_test_code_reading(bool try_kcore)
>  				continue;
>  			}
>  
> -			if (verbose) {
> +			if (verbose > 0) {
>  				char errbuf[512];
>  				perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
>  				pr_debug("perf_evlist__open() failed!\n%s\n", errbuf);
> diff --git a/tools/perf/tests/fdarray.c b/tools/perf/tests/fdarray.c
> index a2b5ff9bf83d..bc5982f42dc3 100644
> --- a/tools/perf/tests/fdarray.c
> +++ b/tools/perf/tests/fdarray.c
> @@ -19,7 +19,7 @@ static int fdarray__fprintf_prefix(struct fdarray *fda, const char *prefix, FILE
>  {
>  	int printed = 0;
>  
> -	if (!verbose)
> +	if (verbose <= 0)
>  		return 0;
>  
>  	printed += fprintf(fp, "\n%s: ", prefix);
> diff --git a/tools/perf/tests/llvm.c b/tools/perf/tests/llvm.c
> index d357dab72e68..482b5365e68d 100644
> --- a/tools/perf/tests/llvm.c
> +++ b/tools/perf/tests/llvm.c
> @@ -76,7 +76,7 @@ test_llvm__fetch_bpf_obj(void **p_obj_buf,
>  	 * Skip this test if user's .perfconfig doesn't set [llvm] section
>  	 * and clang is not found in $PATH, and this is not perf test -v
>  	 */
> -	if (!force && (verbose == 0 &&
> +	if (!force && (verbose <= 0 &&
>  		       !llvm_param.user_set_param &&
>  		       llvm__search_clang())) {
>  		pr_debug("No clang and no verbosive, skip this test\n");
> diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
> index aa9276bfe3e9..1dc838014422 100644
> --- a/tools/perf/tests/parse-events.c
> +++ b/tools/perf/tests/parse-events.c
> @@ -1808,7 +1808,7 @@ static void debug_warn(const char *warn, va_list params)
>  {
>  	char msg[1024];
>  
> -	if (!verbose)
> +	if (verbose <= 0)
>  		return;
>  
>  	vsnprintf(msg, sizeof(msg), warn, params);
> diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
> index 541da7a68f91..87893f3ba5f1 100644
> --- a/tools/perf/tests/perf-record.c
> +++ b/tools/perf/tests/perf-record.c
> @@ -172,13 +172,13 @@ int test__PERF_RECORD(int subtest __maybe_unused)
>  
>  				err = perf_evlist__parse_sample(evlist, event, &sample);
>  				if (err < 0) {
> -					if (verbose)
> +					if (verbose > 0)
>  						perf_event__fprintf(event, stderr);
>  					pr_debug("Couldn't parse sample\n");
>  					goto out_delete_evlist;
>  				}
>  
> -				if (verbose) {
> +				if (verbose > 0) {
>  					pr_info("%" PRIu64" %d ", sample.time, sample.cpu);
>  					perf_event__fprintf(event, stderr);
>  				}
> diff --git a/tools/perf/tests/python-use.c b/tools/perf/tests/python-use.c
> index 7a52834ee0d0..fa79509da535 100644
> --- a/tools/perf/tests/python-use.c
> +++ b/tools/perf/tests/python-use.c
> @@ -15,7 +15,7 @@ int test__python_use(int subtest __maybe_unused)
>  	int ret;
>  
>  	if (asprintf(&cmd, "echo \"import sys ; sys.path.append('%s'); import perf\" | %s %s",
> -		     PYTHONPATH, PYTHON, verbose ? "" : "2> /dev/null") < 0)
> +		     PYTHONPATH, PYTHON, verbose > 0 ? "" : "2> /dev/null") < 0)
>  		return -1;
>  
>  	ret = system(cmd) ? -1 : 0;
> diff --git a/tools/perf/tests/thread-map.c b/tools/perf/tests/thread-map.c
> index a4a4b4625ac3..f2d2e542d0ee 100644
> --- a/tools/perf/tests/thread-map.c
> +++ b/tools/perf/tests/thread-map.c
> @@ -109,7 +109,7 @@ int test__thread_map_remove(int subtest __maybe_unused)
>  	TEST_ASSERT_VAL("failed to allocate thread_map",
>  			threads);
>  
> -	if (verbose)
> +	if (verbose > 0)
>  		thread_map__fprintf(threads, stderr);
>  
>  	TEST_ASSERT_VAL("failed to remove thread",
> @@ -117,7 +117,7 @@ int test__thread_map_remove(int subtest __maybe_unused)
>  
>  	TEST_ASSERT_VAL("thread_map count != 1", threads->nr == 1);
>  
> -	if (verbose)
> +	if (verbose > 0)
>  		thread_map__fprintf(threads, stderr);
>  
>  	TEST_ASSERT_VAL("failed to remove thread",
> @@ -125,7 +125,7 @@ int test__thread_map_remove(int subtest __maybe_unused)
>  
>  	TEST_ASSERT_VAL("thread_map count != 0", threads->nr == 0);
>  
> -	if (verbose)
> +	if (verbose > 0)
>  		thread_map__fprintf(threads, stderr);
>  
>  	TEST_ASSERT_VAL("failed to not remove thread",
> diff --git a/tools/perf/tests/vmlinux-kallsyms.c b/tools/perf/tests/vmlinux-kallsyms.c
> index a5082331f246..862b043e5924 100644
> --- a/tools/perf/tests/vmlinux-kallsyms.c
> +++ b/tools/perf/tests/vmlinux-kallsyms.c
> @@ -168,7 +168,7 @@ int test__vmlinux_matches_kallsyms(int subtest __maybe_unused)
>  		err = -1;
>  	}
>  
> -	if (!verbose)
> +	if (verbose <= 0)
>  		goto out;
>  
>  	header_printed = false;
> diff --git a/tools/perf/ui/browsers/map.c b/tools/perf/ui/browsers/map.c
> index 98a34664bb7e..9ce142de536d 100644
> --- a/tools/perf/ui/browsers/map.c
> +++ b/tools/perf/ui/browsers/map.c
> @@ -73,7 +73,7 @@ static int map_browser__run(struct map_browser *browser)
>  
>  	if (ui_browser__show(&browser->b, browser->map->dso->long_name,
>  			     "Press ESC to exit, %s / to search",
> -			     verbose ? "" : "restart with -v to use") < 0)
> +			     verbose > 0 ? "" : "restart with -v to use") < 0)
>  		return -1;
>  
>  	while (1) {
> @@ -81,7 +81,7 @@ static int map_browser__run(struct map_browser *browser)
>  
>  		switch (key) {
>  		case '/':
> -			if (verbose)
> +			if (verbose > 0)
>  				map_browser__search(browser);
>  		default:
>  			break;
> @@ -117,7 +117,7 @@ int map__browse(struct map *map)
>  
>  		if (maxaddr < pos->end)
>  			maxaddr = pos->end;
> -		if (verbose) {
> +		if (verbose > 0) {
>  			u32 *idx = symbol__browser_index(pos);
>  			*idx = mb.b.nr_entries;
>  		}
> diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
> index 18cfcdc90356..5d632dca672a 100644
> --- a/tools/perf/ui/hist.c
> +++ b/tools/perf/ui/hist.c
> @@ -648,7 +648,7 @@ unsigned int hists__sort_list_width(struct hists *hists)
>  		ret += fmt->width(fmt, &dummy_hpp, hists);
>  	}
>  
> -	if (verbose && hists__has(hists, sym)) /* Addr + origin */
> +	if (verbose > 0 && hists__has(hists, sym)) /* Addr + origin */
>  		ret += 3 + BITS_PER_LONG / 4;
>  
>  	return ret;
> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> index 06cc04e5806a..273f21fa32b5 100644
> --- a/tools/perf/util/annotate.c
> +++ b/tools/perf/util/annotate.c
> @@ -1768,7 +1768,7 @@ int symbol__annotate_printf(struct symbol *sym, struct map *map,
>  	printf("%-*.*s----\n",
>  	       graph_dotted_len, graph_dotted_len, graph_dotted_line);
>  
> -	if (verbose)
> +	if (verbose > 0)
>  		symbol__annotate_hits(sym, evsel);
>  
>  	list_for_each_entry(pos, &notes->src->source, node) {
> diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
> index 35f5b7b7715c..28fb62c32678 100644
> --- a/tools/perf/util/probe-event.c
> +++ b/tools/perf/util/probe-event.c
> @@ -594,7 +594,7 @@ static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp,
>  	pr_debug("try to find information at %" PRIx64 " in %s\n", addr,
>  		 tp->module ? : "kernel");
>  
> -	dinfo = debuginfo_cache__open(tp->module, verbose == 0);
> +	dinfo = debuginfo_cache__open(tp->module, verbose <= 0);
>  	if (dinfo)
>  		ret = debuginfo__find_probe_point(dinfo,
>  						 (unsigned long)addr, pp);
> diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
> index 39345c2ddfc2..0d51334a9b46 100644
> --- a/tools/perf/util/stat.c
> +++ b/tools/perf/util/stat.c
> @@ -344,7 +344,7 @@ int perf_stat_process_counter(struct perf_stat_config *config,
>  	for (i = 0; i < 3; i++)
>  		update_stats(&ps->res_stats[i], count[i]);
>  
> -	if (verbose) {
> +	if (verbose > 0) {
>  		fprintf(config->output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
>  			perf_evsel__name(counter), count[0], count[1], count[2]);
>  	}

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