perf evsel: Introduce config attr method

Out of the code in 'perf record', so that we can share option parsing,
etc. Eventually will be used by 'perf top', but first 'trace' will use
it.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
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-hzjqsgnte1esk90ytq0ap98v@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 48 insertions, 132 deletions

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 6ab58cc..c3ac541 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -35,32 +35,24 @@ enum write_mode_t {
 	WRITE_APPEND
 };
 
-static u64			user_interval			= ULLONG_MAX;
-static u64			default_interval		=      0;
+static struct perf_record_opts record_opts = {
+	.target_pid	     = -1,
+	.target_tid	     = -1,
+	.user_freq	     = UINT_MAX,
+	.user_interval	     = ULLONG_MAX,
+	.freq		     = 1000,
+	.sample_id_all_avail = true,
+};
 
 static unsigned int		page_size;
 static unsigned int		mmap_pages			= UINT_MAX;
-static unsigned int		user_freq 			= UINT_MAX;
-static int			freq				=   1000;
 static int			output;
 static int			pipe_output			=      0;
 static const char		*output_name			= NULL;
 static bool			group				=  false;
 static int			realtime_prio			=      0;
-static bool			nodelay				=  false;
-static bool			raw_samples			=  false;
-static bool			sample_id_all_avail		=   true;
-static bool			system_wide			=  false;
-static pid_t			target_pid			=     -1;
-static pid_t			target_tid			=     -1;
 static pid_t			child_pid			=     -1;
-static bool			no_inherit			=  false;
 static enum write_mode_t	write_mode			= WRITE_FORCE;
-static bool			call_graph			=  false;
-static bool			inherit_stat			=  false;
-static bool			no_samples			=  false;
-static bool			sample_address			=  false;
-static bool			sample_time			=  false;
 static bool			no_buildid			=  false;
 static bool			no_buildid_cache		=  false;
 static struct perf_evlist	*evsel_list;
@@ -72,7 +64,6 @@ static int			file_new			=      1;
 static off_t			post_processing_offset;
 
 static struct perf_session	*session;
-static const char		*cpu_list;
 static const char               *progname;
 
 static void advance_output(size_t size)
@@ -169,78 +160,6 @@ static void sig_atexit(void)
 	kill(getpid(), signr);
 }
 
-static void config_attr(struct perf_evsel *evsel, struct perf_evlist *evlist)
-{
-	struct perf_event_attr *attr = &evsel->attr;
-	int track = !evsel->idx; /* only the first counter needs these */
-
-	attr->disabled		= 1;
-	attr->inherit		= !no_inherit;
-	attr->read_format	= PERF_FORMAT_TOTAL_TIME_ENABLED |
-				  PERF_FORMAT_TOTAL_TIME_RUNNING |
-				  PERF_FORMAT_ID;
-
-	attr->sample_type	|= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
-
-	if (evlist->nr_entries > 1)
-		attr->sample_type |= PERF_SAMPLE_ID;
-
-	/*
-	 * We default some events to a 1 default interval. But keep
-	 * it a weak assumption overridable by the user.
-	 */
-	if (!attr->sample_period || (user_freq != UINT_MAX &&
-				     user_interval != ULLONG_MAX)) {
-		if (freq) {
-			attr->sample_type	|= PERF_SAMPLE_PERIOD;
-			attr->freq		= 1;
-			attr->sample_freq	= freq;
-		} else {
-			attr->sample_period = default_interval;
-		}
-	}
-
-	if (no_samples)
-		attr->sample_freq = 0;
-
-	if (inherit_stat)
-		attr->inherit_stat = 1;
-
-	if (sample_address) {
-		attr->sample_type	|= PERF_SAMPLE_ADDR;
-		attr->mmap_data = track;
-	}
-
-	if (call_graph)
-		attr->sample_type	|= PERF_SAMPLE_CALLCHAIN;
-
-	if (system_wide)
-		attr->sample_type	|= PERF_SAMPLE_CPU;
-
-	if (sample_id_all_avail &&
-	    (sample_time || system_wide || !no_inherit || cpu_list))
-		attr->sample_type	|= PERF_SAMPLE_TIME;
-
-	if (raw_samples) {
-		attr->sample_type	|= PERF_SAMPLE_TIME;
-		attr->sample_type	|= PERF_SAMPLE_RAW;
-		attr->sample_type	|= PERF_SAMPLE_CPU;
-	}
-
-	if (nodelay) {
-		attr->watermark = 0;
-		attr->wakeup_events = 1;
-	}
-
-	attr->mmap		= track;
-	attr->comm		= track;
-
-	if (target_pid == -1 && target_tid == -1 && !system_wide) {
-		attr->disabled = 1;
-		attr->enable_on_exec = 1;
-	}
-}
-
 static bool perf_evlist__equal(struct perf_evlist *evlist,
 			       struct perf_evlist *other)
 {
@@ -264,11 +183,10 @@ static void open_counters(struct perf_evlist *evlist)
 {
 	struct perf_evsel *pos, *first;
 
-	if (evlist->cpus->map[0] < 0)
-		no_inherit = true;
-
 	first = list_entry(evlist->entries.next, struct perf_evsel, node);
 
+	perf_evlist__config_attrs(evlist, &record_opts);
+
 	list_for_each_entry(pos, &evlist->entries, node) {
 		struct perf_event_attr *attr = &pos->attr;
 		struct xyarray *group_fd = NULL;
@@ -288,10 +206,8 @@ static void open_counters(struct perf_evlist *evlist)
 
 		if (group && pos != first)
 			group_fd = first->fd;
-
-		config_attr(pos, evlist);
 retry_sample_id:
-		attr->sample_id_all = sample_id_all_avail ? 1 : 0;
+		attr->sample_id_all = record_opts.sample_id_all_avail ? 1 : 0;
 try_again:
 		if (perf_evsel__open(pos, evlist->cpus, evlist->threads, group,
 				     group_fd) < 0) {
@@ -300,15 +216,15 @@ try_again:
 			if (err == EPERM || err == EACCES) {
 				ui__error_paranoid();
 				exit(EXIT_FAILURE);
-			} else if (err ==  ENODEV && cpu_list) {
+			} else if (err ==  ENODEV && record_opts.cpu_list) {
 				die("No such device - did you specify"
 					" an out-of-range profile CPU?\n");
-			} else if (err == EINVAL && sample_id_all_avail) {
+			} else if (err == EINVAL && record_opts.sample_id_all_avail) {
 				/*
 				 * Old kernel, no attr->sample_id_type_all field
 				 */
-				sample_id_all_avail = false;
-				if (!sample_time && !raw_samples && !time_needed)
+				record_opts.sample_id_all_avail = false;
+				if (!record_opts.sample_time && !record_opts.raw_samples && !time_needed)
 					attr->sample_type &= ~PERF_SAMPLE_TIME;
 
 				goto retry_sample_id;
@@ -482,13 +398,13 @@ static int __cmd_record(int argc, const char **argv)
 
 	if (!output_name) {
 		if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode))
-			pipe_output = 1;
+			pipe_output = true;
 		else
 			output_name = "perf.data";
 	}
 	if (output_name) {
 		if (!strcmp(output_name, "-"))
-			pipe_output = 1;
+			pipe_output = true;
 		else if (!stat(output_name, &st) && st.st_size) {
 			if (write_mode == WRITE_FORCE) {
 				char oldname[PATH_MAX];
@@ -592,7 +508,7 @@ static int __cmd_record(int argc, const char **argv)
 			exit(-1);
 		}
 
-		if (!system_wide && target_tid == -1 && target_pid == -1)
+		if (!record_opts.system_wide && record_opts.target_tid == -1 && record_opts.target_pid == -1)
 			evsel_list->threads->map[0] = child_pid;
 
 		close(child_ready_pipe[1]);
@@ -689,7 +605,7 @@ static int __cmd_record(int argc, const char **argv)
 		perf_session__process_machines(session,
 					       perf_event__synthesize_guest_os);
 
-	if (!system_wide)
+	if (!record_opts.system_wide)
 		perf_event__synthesize_thread_map(evsel_list->threads,
 						  process_synthesized_event,
 						  session);
@@ -766,44 +682,44 @@ const struct option record_options[] = {
 		     parse_events_option),
 	OPT_CALLBACK(0, "filter", &evsel_list, "filter",
 		     "event filter", parse_filter),
-	OPT_INTEGER('p', "pid", &target_pid,
+	OPT_INTEGER('p', "pid", &record_opts.target_pid,
 		    "record events on existing process id"),
-	OPT_INTEGER('t', "tid", &target_tid,
+	OPT_INTEGER('t', "tid", &record_opts.target_tid,
 		    "record events on existing thread id"),
 	OPT_INTEGER('r', "realtime", &realtime_prio,
 		    "collect data with this RT SCHED_FIFO priority"),
-	OPT_BOOLEAN('D', "no-delay", &nodelay,
+	OPT_BOOLEAN('D', "no-delay", &record_opts.no_delay,
 		    "collect data without buffering"),
-	OPT_BOOLEAN('R', "raw-samples", &raw_samples,
+	OPT_BOOLEAN('R', "raw-samples", &record_opts.raw_samples,
 		    "collect raw sample records from all opened counters"),
-	OPT_BOOLEAN('a', "all-cpus", &system_wide,
+	OPT_BOOLEAN('a', "all-cpus", &record_opts.system_wide,
 			    "system-wide collection from all CPUs"),
 	OPT_BOOLEAN('A', "append", &append_file,
 			    "append to the output file to do incremental profiling"),
-	OPT_STRING('C', "cpu", &cpu_list, "cpu",
+	OPT_STRING('C', "cpu", &record_opts.cpu_list, "cpu",
 		    "list of cpus to monitor"),
 	OPT_BOOLEAN('f', "force", &force,
 			"overwrite existing data file (deprecated)"),
-	OPT_U64('c', "count", &user_interval, "event period to sample"),
+	OPT_U64('c', "count", &record_opts.user_interval, "event period to sample"),
 	OPT_STRING('o', "output", &output_name, "file",
 		    "output file name"),
-	OPT_BOOLEAN('i', "no-inherit", &no_inherit,
+	OPT_BOOLEAN('i', "no-inherit", &record_opts.no_inherit,
 		    "child tasks do not inherit counters"),
-	OPT_UINTEGER('F', "freq", &user_freq, "profile at this frequency"),
+	OPT_UINTEGER('F', "freq", &record_opts.user_freq, "profile at this frequency"),
 	OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
 	OPT_BOOLEAN(0, "group", &group,
 		    "put the counters into a counter group"),
-	OPT_BOOLEAN('g', "call-graph", &call_graph,
+	OPT_BOOLEAN('g', "call-graph", &record_opts.call_graph,
 		    "do call-graph (stack chain/backtrace) recording"),
 	OPT_INCR('v', "verbose", &verbose,
 		    "be more verbose (show counter open errors, etc)"),
 	OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
-	OPT_BOOLEAN('s', "stat", &inherit_stat,
+	OPT_BOOLEAN('s', "stat", &record_opts.inherit_stat,
 		    "per thread counts"),
-	OPT_BOOLEAN('d', "data", &sample_address,
+	OPT_BOOLEAN('d', "data", &record_opts.sample_address,
 		    "Sample addresses"),
-	OPT_BOOLEAN('T', "timestamp", &sample_time, "Sample timestamps"),
-	OPT_BOOLEAN('n', "no-samples", &no_samples,
+	OPT_BOOLEAN('T', "timestamp", &record_opts.sample_time, "Sample timestamps"),
+	OPT_BOOLEAN('n', "no-samples", &record_opts.no_samples,
 		    "don't sample"),
 	OPT_BOOLEAN('N', "no-buildid-cache", &no_buildid_cache,
 		    "do not update the buildid cache"),
@@ -828,8 +744,8 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
 
 	argc = parse_options(argc, argv, record_options, record_usage,
 			    PARSE_OPT_STOP_AT_NON_OPTION);
-	if (!argc && target_pid == -1 && target_tid == -1 &&
-		!system_wide && !cpu_list)
+	if (!argc && record_opts.target_pid == -1 && record_opts.target_tid == -1 &&
+		!record_opts.system_wide && !record_opts.cpu_list)
 		usage_with_options(record_usage, record_options);
 
 	if (force && append_file) {
@@ -842,7 +758,7 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
 		write_mode = WRITE_FORCE;
 	}
 
-	if (nr_cgroups && !system_wide) {
+	if (nr_cgroups && !record_opts.system_wide) {
 		fprintf(stderr, "cgroup monitoring only available in"
 			" system-wide mode\n");
 		usage_with_options(record_usage, record_options);
@@ -869,11 +785,11 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
 		goto out_symbol_exit;
 	}
 
-	if (target_pid != -1)
-		target_tid = target_pid;
+	if (record_opts.target_pid != -1)
+		record_opts.target_tid = record_opts.target_pid;
 
-	if (perf_evlist__create_maps(evsel_list, target_pid,
-				     target_tid, cpu_list) < 0)
+	if (perf_evlist__create_maps(evsel_list, record_opts.target_pid,
+				     record_opts.target_tid, record_opts.cpu_list) < 0)
 		usage_with_options(record_usage, record_options);
 
 	list_for_each_entry(pos, &evsel_list->entries, node) {
@@ -887,18 +803,18 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
 	if (perf_evlist__alloc_pollfd(evsel_list) < 0)
 		goto out_free_fd;
 
-	if (user_interval != ULLONG_MAX)
-		default_interval = user_interval;
-	if (user_freq != UINT_MAX)
-		freq = user_freq;
+	if (record_opts.user_interval != ULLONG_MAX)
+		record_opts.default_interval = record_opts.user_interval;
+	if (record_opts.user_freq != UINT_MAX)
+		record_opts.freq = record_opts.user_freq;
 
 	/*
 	 * User specified count overrides default frequency.
 	 */
-	if (default_interval)
-		freq = 0;
-	else if (freq) {
-		default_interval = freq;
+	if (record_opts.default_interval)
+		record_opts.freq = 0;
+	else if (record_opts.freq) {
+		record_opts.default_interval = record_opts.freq;
 	} else {
 		fprintf(stderr, "frequency and count are zero, aborting\n");
 		err = -EINVAL;