Merge tag 'perf-core-for-mingo' of... (1d787d37) · Commits · 戴 / test

tools/perf/Documentation/perf-trace.txt

0 → 100644

+53 −0

Original line number	Diff line number	Diff line
		perf-trace(1)
		=============

		NAME
		----
		perf-trace - strace inspired tool

		SYNOPSIS
		--------
		[verse]
		'perf trace'

		DESCRIPTION
		-----------
		This command will show the events associated with the target, initially
		syscalls, but other system events like pagefaults, task lifetime events,
		scheduling events, etc.

		Initially this is a live mode only tool, but eventually will work with
		perf.data files like the other tools, allowing a detached 'record' from
		analysis phases.

		OPTIONS
		-------

		--all-cpus::
		System-wide collection from all CPUs.

		-p::
		--pid=::
		Record events on existing process ID (comma separated list).

		--tid=::
		Record events on existing thread ID (comma separated list).

		--uid=::
		Record events in threads owned by uid. Name or number.

		--no-inherit::
		Child tasks do not inherit counters.

		--mmap-pages=::
		Number of mmap data pages. Must be a power of two.

		--cpu::
		Collect samples only on the list of CPUs provided. Multiple CPUs can be provided as a
		comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2.
		In per-thread mode with inheritance mode on (default), Events are captured only when
		the thread executes on the designated CPUs. Default is to monitor all CPUs.

		SEE ALSO
		--------
		linkperf:perf-record[1], linkperf:perf-script[1]

tools/perf/Makefile

+13 −0

Original line number	Diff line number	Diff line
		@@ -559,6 +559,19 @@ else
		LIB_OBJS += $(OUTPUT)util/unwind.o
		endif

		ifdef NO_LIBAUDIT
		BASIC_CFLAGS += -DNO_LIBAUDIT_SUPPORT
		else
		FLAGS_LIBAUDIT = $(ALL_CFLAGS) $(ALL_LDFLAGS) -laudit
		ifneq ($(call try-cc,$(SOURCE_LIBAUDIT),$(FLAGS_LIBAUDIT)),y)
		msg := $(warning No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev);
		BASIC_CFLAGS += -DNO_LIBAUDIT_SUPPORT
		else
		BUILTIN_OBJS += $(OUTPUT)builtin-trace.o
		EXTLIBS += -laudit
		endif
		endif

		ifdef NO_NEWT
		BASIC_CFLAGS += -DNO_NEWT_SUPPORT
		else

tools/perf/builtin-record.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -320,7 +320,7 @@ try_again:
		}
		}

		if (perf_evlist__set_filters(evlist)) {
		if (perf_evlist__apply_filters(evlist)) {
		error("failed to set filter with %d (%s)\n", errno,
		strerror(errno));
		rc = -1;

tools/perf/builtin-stat.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -478,7 +478,7 @@ static int run_perf_stat(int argc __maybe_unused, const char **argv)
		counter->supported = true;
		}

		if (perf_evlist__set_filters(evsel_list)) {
		if (perf_evlist__apply_filters(evsel_list)) {
		error("failed to set filter with %d (%s)\n", errno,
		strerror(errno));
		return -1;

tools/perf/builtin-test.c

+118 −2

Original line number	Diff line number	Diff line
		@@ -564,7 +564,7 @@ static int test__basic_mmap(void)
		goto out_munmap;
		}

		err = perf_evlist__parse_sample(evlist, event, &sample, false);
		err = perf_evlist__parse_sample(evlist, event, &sample);
		if (err) {
		pr_err("Can't parse sample, err = %d\n", err);
		goto out_munmap;
		@@ -781,7 +781,7 @@ static int test__PERF_RECORD(void)
		if (type < PERF_RECORD_MAX)
		nr_events[type]++;

		err = perf_evlist__parse_sample(evlist, event, &sample, false);
		err = perf_evlist__parse_sample(evlist, event, &sample);
		if (err < 0) {
		if (verbose)
		perf_event__fprintf(event, stderr);
		@@ -1289,6 +1289,118 @@ static int perf_evsel__tp_sched_test(void)
		return ret;
		}

		static int test__syscall_open_tp_fields(void)
		{
		struct perf_record_opts opts = {
		.target = {
		.uid = UINT_MAX,
		.uses_mmap = true,
		},
		.no_delay = true,
		.freq = 1,
		.mmap_pages = 256,
		.raw_samples = true,
		};
		const char *filename = "/etc/passwd";
		int flags = O_RDONLY \| O_DIRECTORY;
		struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
		struct perf_evsel *evsel;
		int err = -1, i, nr_events = 0, nr_polls = 0;

		if (evlist == NULL) {
		pr_debug("%s: perf_evlist__new\n", __func__);
		goto out;
		}

		evsel = perf_evsel__newtp("syscalls", "sys_enter_open", 0);
		if (evsel == NULL) {
		pr_debug("%s: perf_evsel__newtp\n", __func__);
		goto out_delete_evlist;
		}

		perf_evlist__add(evlist, evsel);

		err = perf_evlist__create_maps(evlist, &opts.target);
		if (err < 0) {
		pr_debug("%s: perf_evlist__create_maps\n", __func__);
		goto out_delete_evlist;
		}

		perf_evsel__config(evsel, &opts, evsel);

		evlist->threads->map[0] = getpid();

		err = perf_evlist__open(evlist);
		if (err < 0) {
		pr_debug("perf_evlist__open: %s\n", strerror(errno));
		goto out_delete_evlist;
		}

		err = perf_evlist__mmap(evlist, UINT_MAX, false);
		if (err < 0) {
		pr_debug("perf_evlist__mmap: %s\n", strerror(errno));
		goto out_delete_evlist;
		}

		perf_evlist__enable(evlist);

		/*
		* Generate the event:
		*/
		open(filename, flags);

		while (1) {
		int before = nr_events;

		for (i = 0; i < evlist->nr_mmaps; i++) {
		union perf_event *event;

		while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
		const u32 type = event->header.type;
		int tp_flags;
		struct perf_sample sample;

		++nr_events;

		if (type != PERF_RECORD_SAMPLE)
		continue;

		err = perf_evsel__parse_sample(evsel, event, &sample);
		if (err) {
		pr_err("Can't parse sample, err = %d\n", err);
		goto out_munmap;
		}

		tp_flags = perf_evsel__intval(evsel, &sample, "flags");

		if (flags != tp_flags) {
		pr_debug("%s: Expected flags=%#x, got %#x\n",
		__func__, flags, tp_flags);
		goto out_munmap;
		}

		goto out_ok;
		}
		}

		if (nr_events == before)
		poll(evlist->pollfd, evlist->nr_fds, 10);

		if (++nr_polls > 5) {
		pr_debug("%s: no events!\n", __func__);
		goto out_munmap;
		}
		}
		out_ok:
		err = 0;
		out_munmap:
		perf_evlist__munmap(evlist);
		out_delete_evlist:
		perf_evlist__delete(evlist);
		out:
		return err;
		}

		static struct test {
		const char *desc;
		int (*func)(void);
		@@ -1339,6 +1451,10 @@ static struct test {
		.desc = "Check parsing of sched tracepoints fields",
		.func = perf_evsel__tp_sched_test,
		},
		{
		.desc = "Generate and check syscalls:sys_enter_open event fields",
		.func = test__syscall_open_tp_fields,
		},
		{
		.func = NULL,
		},

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