perf top: Use perf_evlist__config()

Using struct perf_record_opts to specify how to configure the evsel
perf_event_attrs.

This gets top closer to record in the way it sets up evsels, with the
aim of sharing more and more to the point that both will be a single
utility.

In this direction top now uses the same callchain option parsing as
record and that brings DWARF callchains to top, something that was
already available for record.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-u03o0bsrqcjgskciso3pvsjr@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Documentation/perf-top.txt

@@ -60,7 +60,7 @@ Default is to monitor all CPUS.
 
 -i::
 --inherit::
-	Child tasks inherit counters, only makes sens with -p option.
+	Child tasks do not inherit counters.
 
 -k <path>::
 --vmlinux=<path>::

tools/perf/util/top.c

@@ -26,6 +26,8 @@ size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
 	float samples_per_sec = top->samples / top->delay_secs;
 	float ksamples_per_sec = top->kernel_samples / top->delay_secs;
 	float esamples_percent = (100.0 * top->exact_samples) / top->samples;
+	struct perf_record_opts *opts = &top->record_opts;
+	struct perf_target *target = &opts->target;
 	size_t ret = 0;
 
 	if (!perf_guest) {
@@ -61,31 +63,31 @@ size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
 		struct perf_evsel *first = perf_evlist__first(top->evlist);
 		ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
 				(uint64_t)first->attr.sample_period,
-				top->freq ? "Hz" : "");
+				opts->freq ? "Hz" : "");
 	}
 
 	ret += SNPRINTF(bf + ret, size - ret, "%s", perf_evsel__name(top->sym_evsel));
 
 	ret += SNPRINTF(bf + ret, size - ret, "], ");
 
-	if (top->target.pid)
+	if (target->pid)
 		ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %s",
-				top->target.pid);
-	else if (top->target.tid)
+				target->pid);
+	else if (target->tid)
 		ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %s",
-				top->target.tid);
-	else if (top->target.uid_str != NULL)
+				target->tid);
+	else if (target->uid_str != NULL)
 		ret += SNPRINTF(bf + ret, size - ret, " (uid: %s",
-				top->target.uid_str);
+				target->uid_str);
 	else
 		ret += SNPRINTF(bf + ret, size - ret, " (all");
 
-	if (top->target.cpu_list)
+	if (target->cpu_list)
 		ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
 				top->evlist->cpus->nr > 1 ? "s" : "",
-				top->target.cpu_list);
+				target->cpu_list);
 	else {
-		if (top->target.tid)
+		if (target->tid)
 			ret += SNPRINTF(bf + ret, size - ret, ")");
 		else
 			ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)",

tools/perf/util/top.h

@@ -14,7 +14,7 @@ struct perf_session;
 struct perf_top {
 	struct perf_tool   tool;
 	struct perf_evlist *evlist;
-	struct perf_target target;
+	struct perf_record_opts record_opts;
 	/*
 	 * Symbols will be added here in perf_event__process_sample and will
 	 * get out after decayed.
@@ -24,15 +24,11 @@ struct perf_top {
 	u64		   exact_samples;
 	u64		   guest_us_samples, guest_kernel_samples;
 	int		   print_entries, count_filter, delay_secs;
-	int		   freq;
 	bool		   hide_kernel_symbols, hide_user_symbols, zero;
 	bool		   use_tui, use_stdio;
 	bool		   sort_has_symbols;
-	bool		   dont_use_callchains;
 	bool		   kptr_restrict_warned;
 	bool		   vmlinux_warned;
-	bool		   inherit;
-	bool		   group;
 	bool		   sample_id_all_missing;
 	bool		   exclude_guest_missing;
 	bool		   dump_symtab;
@@ -40,8 +36,6 @@ struct perf_top {
 	struct perf_evsel  *sym_evsel;
 	struct perf_session *session;
 	struct winsize	   winsize;
-	unsigned int	   mmap_pages;
-	int		   default_interval;
 	int		   realtime_prio;
 	int		   sym_pcnt_filter;
 	const char	   *sym_filter;