tools/perf/builtin-c2c.c

#include <linux/compiler.h>
#include <linux/kernel.h>
#include "util.h"
#include "debug.h"
#include "builtin.h"
#include <subcmd/parse-options.h>
#include "mem-events.h"
#include "session.h"
#include "hist.h"
#include "tool.h"
#include "data.h"

struct perf_c2c {
	struct perf_tool tool;
};

static struct perf_c2c c2c;

static const char * const c2c_usage[] = {
	"perf c2c {record|report}",
	NULL
};

static const char * const __usage_report[] = {
	"perf c2c report",
	NULL
};

static const char * const *report_c2c_usage = __usage_report;

static int perf_c2c__report(int argc, const char **argv)
{
	struct perf_session *session;
	struct perf_data_file file = {
		.mode = PERF_DATA_MODE_READ,
	};
	const struct option c2c_options[] = {
	OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
		   "file", "vmlinux pathname"),
	OPT_INCR('v', "verbose", &verbose,
		 "be more verbose (show counter open errors, etc)"),
	OPT_STRING('i', "input", &input_name, "file",
		   "the input file to process"),
	OPT_END()
	};
	int err = 0;

	argc = parse_options(argc, argv, c2c_options, report_c2c_usage,
			     PARSE_OPT_STOP_AT_NON_OPTION);
	if (!argc)
		usage_with_options(report_c2c_usage, c2c_options);

	file.path = input_name;

	session = perf_session__new(&file, 0, &c2c.tool);
	if (session == NULL) {
		pr_debug("No memory for session\n");
		goto out;
	}

	if (symbol__init(&session->header.env) < 0)
		goto out_session;

	/* No pipe support at the moment. */
	if (perf_data_file__is_pipe(session->file)) {
		pr_debug("No pipe support at the moment.\n");
		goto out_session;
	}

out_session:
	perf_session__delete(session);
out:
	return err;
}

static int parse_record_events(const struct option *opt __maybe_unused,
			       const char *str, int unset __maybe_unused)
{
	bool *event_set = (bool *) opt->value;

	*event_set = true;
	return perf_mem_events__parse(str);
}


static const char * const __usage_record[] = {
	"perf c2c record [<options>] [<command>]",
	"perf c2c record [<options>] -- <command> [<options>]",
	NULL
};

static const char * const *record_mem_usage = __usage_record;

static int perf_c2c__record(int argc, const char **argv)
{
	int rec_argc, i = 0, j;
	const char **rec_argv;
	int ret;
	bool all_user = false, all_kernel = false;
	bool event_set = false;
	struct option options[] = {
	OPT_CALLBACK('e', "event", &event_set, "event",
		     "event selector. Use 'perf mem record -e list' to list available events",
		     parse_record_events),
	OPT_INCR('v', "verbose", &verbose,
		 "be more verbose (show counter open errors, etc)"),
	OPT_BOOLEAN('u', "all-user", &all_user, "collect only user level data"),
	OPT_BOOLEAN('k', "all-kernel", &all_kernel, "collect only kernel level data"),
	OPT_UINTEGER('l', "ldlat", &perf_mem_events__loads_ldlat, "setup mem-loads latency"),
	OPT_END()
	};

	if (perf_mem_events__init()) {
		pr_err("failed: memory events not supported\n");
		return -1;
	}

	argc = parse_options(argc, argv, options, record_mem_usage,
			     PARSE_OPT_KEEP_UNKNOWN);

	rec_argc = argc + 10; /* max number of arguments */
	rec_argv = calloc(rec_argc + 1, sizeof(char *));
	if (!rec_argv)
		return -1;

	rec_argv[i++] = "record";

	if (!event_set) {
		perf_mem_events[PERF_MEM_EVENTS__LOAD].record  = true;
		perf_mem_events[PERF_MEM_EVENTS__STORE].record = true;
	}

	if (perf_mem_events[PERF_MEM_EVENTS__LOAD].record)
		rec_argv[i++] = "-W";

	rec_argv[i++] = "-d";
	rec_argv[i++] = "--sample-cpu";

	for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
		if (!perf_mem_events[j].record)
			continue;

		if (!perf_mem_events[j].supported) {
			pr_err("failed: event '%s' not supported\n",
			       perf_mem_events[j].name);
			return -1;
		}

		rec_argv[i++] = "-e";
		rec_argv[i++] = perf_mem_events__name(j);
	};

	if (all_user)
		rec_argv[i++] = "--all-user";

	if (all_kernel)
		rec_argv[i++] = "--all-kernel";

	for (j = 0; j < argc; j++, i++)
		rec_argv[i] = argv[j];

	if (verbose > 0) {
		pr_debug("calling: ");

		j = 0;

		while (rec_argv[j]) {
			pr_debug("%s ", rec_argv[j]);
			j++;
		}
		pr_debug("\n");
	}

	ret = cmd_record(i, rec_argv, NULL);
	free(rec_argv);
	return ret;
}

int cmd_c2c(int argc, const char **argv, const char *prefix __maybe_unused)
{
	const struct option c2c_options[] = {
	OPT_INCR('v', "verbose", &verbose, "be more verbose"),
	OPT_END()
	};

	argc = parse_options(argc, argv, c2c_options, c2c_usage,
			     PARSE_OPT_STOP_AT_NON_OPTION);

	if (!argc)
		usage_with_options(c2c_usage, c2c_options);

	if (!strncmp(argv[0], "rec", 3)) {
		return perf_c2c__record(argc, argv);
	} else if (!strncmp(argv[0], "rep", 3)) {
		return perf_c2c__report(argc, argv);
	} else {
		usage_with_options(c2c_usage, c2c_options);
	}

	return 0;
}