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Commit a65b9c62 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
Browse files

perf tests: Move test__basic_mmap into separate object 



Separating test__basic_mmap test from the builtin-test into mmap-basic
object.

Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1352508412-16914-5-git-send-email-jolsa@redhat.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent bd90517b

tools/perf/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -434,6 +434,7 @@ LIB_OBJS += $(OUTPUT)tests/attr.o 
LIB_OBJS += $(OUTPUT)tests/vmlinux-kallsyms.o

LIB_OBJS += $(OUTPUT)tests/open-syscall.o

LIB_OBJS += $(OUTPUT)tests/open-syscall-all-cpus.o

LIB_OBJS += $(OUTPUT)tests/mmap-basic.o

LIB_OBJS += $(OUTPUT)tests/util.o



BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o

tools/perf/tests/builtin-test.c

+0 −157
Original line number Diff line number Diff line
@@ -30,163 +30,6 @@ 
#include <sched.h>





/*

 * This test will generate random numbers of calls to some getpid syscalls,

 * then establish an mmap for a group of events that are created to monitor

 * the syscalls.

 *

 * It will receive the events, using mmap, use its PERF_SAMPLE_ID generated

 * sample.id field to map back to its respective perf_evsel instance.

 *

 * Then it checks if the number of syscalls reported as perf events by

 * the kernel corresponds to the number of syscalls made.

 */

static int test__basic_mmap(void)

{

	int err = -1;

	union perf_event *event;

	struct thread_map *threads;

	struct cpu_map *cpus;

	struct perf_evlist *evlist;

	struct perf_event_attr attr = {

		.type		= PERF_TYPE_TRACEPOINT,

		.read_format	= PERF_FORMAT_ID,

		.sample_type	= PERF_SAMPLE_ID,

		.watermark	= 0,

	};

	cpu_set_t cpu_set;

	const char *syscall_names[] = { "getsid", "getppid", "getpgrp",

					"getpgid", };

	pid_t (*syscalls[])(void) = { (void *)getsid, getppid, getpgrp,

				      (void*)getpgid };

#define nsyscalls ARRAY_SIZE(syscall_names)

	int ids[nsyscalls];

	unsigned int nr_events[nsyscalls],

		     expected_nr_events[nsyscalls], i, j;

	struct perf_evsel *evsels[nsyscalls], *evsel;



	for (i = 0; i < nsyscalls; ++i) {

		char name[64];



		snprintf(name, sizeof(name), "sys_enter_%s", syscall_names[i]);

		ids[i] = trace_event__id(name);

		if (ids[i] < 0) {

			pr_debug("Is debugfs mounted on /sys/kernel/debug?\n");

			return -1;

		}

		nr_events[i] = 0;

		expected_nr_events[i] = random() % 257;

	}



	threads = thread_map__new(-1, getpid(), UINT_MAX);

	if (threads == NULL) {

		pr_debug("thread_map__new\n");

		return -1;

	}



	cpus = cpu_map__new(NULL);

	if (cpus == NULL) {

		pr_debug("cpu_map__new\n");

		goto out_free_threads;

	}



	CPU_ZERO(&cpu_set);

	CPU_SET(cpus->map[0], &cpu_set);

	sched_setaffinity(0, sizeof(cpu_set), &cpu_set);

	if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {

		pr_debug("sched_setaffinity() failed on CPU %d: %s ",

			 cpus->map[0], strerror(errno));

		goto out_free_cpus;

	}



	evlist = perf_evlist__new(cpus, threads);

	if (evlist == NULL) {

		pr_debug("perf_evlist__new\n");

		goto out_free_cpus;

	}



	/* anonymous union fields, can't be initialized above */

	attr.wakeup_events = 1;

	attr.sample_period = 1;



	for (i = 0; i < nsyscalls; ++i) {

		attr.config = ids[i];

		evsels[i] = perf_evsel__new(&attr, i);

		if (evsels[i] == NULL) {

			pr_debug("perf_evsel__new\n");

			goto out_free_evlist;

		}



		perf_evlist__add(evlist, evsels[i]);



		if (perf_evsel__open(evsels[i], cpus, threads) < 0) {

			pr_debug("failed to open counter: %s, "

				 "tweak /proc/sys/kernel/perf_event_paranoid?\n",

				 strerror(errno));

			goto out_close_fd;

		}

	}



	if (perf_evlist__mmap(evlist, 128, true) < 0) {

		pr_debug("failed to mmap events: %d (%s)\n", errno,

			 strerror(errno));

		goto out_close_fd;

	}



	for (i = 0; i < nsyscalls; ++i)

		for (j = 0; j < expected_nr_events[i]; ++j) {

			int foo = syscalls[i]();

			++foo;

		}



	while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {

		struct perf_sample sample;



		if (event->header.type != PERF_RECORD_SAMPLE) {

			pr_debug("unexpected %s event\n",

				 perf_event__name(event->header.type));

			goto out_munmap;

		}



		err = perf_evlist__parse_sample(evlist, event, &sample);

		if (err) {

			pr_err("Can't parse sample, err = %d\n", err);

			goto out_munmap;

		}



		evsel = perf_evlist__id2evsel(evlist, sample.id);

		if (evsel == NULL) {

			pr_debug("event with id %" PRIu64

				 " doesn't map to an evsel\n", sample.id);

			goto out_munmap;

		}

		nr_events[evsel->idx]++;

	}



	list_for_each_entry(evsel, &evlist->entries, node) {

		if (nr_events[evsel->idx] != expected_nr_events[evsel->idx]) {

			pr_debug("expected %d %s events, got %d\n",

				 expected_nr_events[evsel->idx],

				 perf_evsel__name(evsel), nr_events[evsel->idx]);

			goto out_munmap;

		}

	}



	err = 0;

out_munmap:

	perf_evlist__munmap(evlist);

out_close_fd:

	for (i = 0; i < nsyscalls; ++i)

		perf_evsel__close_fd(evsels[i], 1, threads->nr);

out_free_evlist:

	perf_evlist__delete(evlist);

out_free_cpus:

	cpu_map__delete(cpus);

out_free_threads:

	thread_map__delete(threads);

	return err;

#undef nsyscalls

}



static int sched__get_first_possible_cpu(pid_t pid, cpu_set_t *maskp)

{

tools/perf/tests/mmap-basic.c

0 → 100644
+162 −0
Original line number Diff line number Diff line 
#include "evlist.h"

#include "evsel.h"

#include "thread_map.h"

#include "cpumap.h"

#include "tests.h"



/*

 * This test will generate random numbers of calls to some getpid syscalls,

 * then establish an mmap for a group of events that are created to monitor

 * the syscalls.

 *

 * It will receive the events, using mmap, use its PERF_SAMPLE_ID generated

 * sample.id field to map back to its respective perf_evsel instance.

 *

 * Then it checks if the number of syscalls reported as perf events by

 * the kernel corresponds to the number of syscalls made.

 */

int test__basic_mmap(void)

{

	int err = -1;

	union perf_event *event;

	struct thread_map *threads;

	struct cpu_map *cpus;

	struct perf_evlist *evlist;

	struct perf_event_attr attr = {

		.type		= PERF_TYPE_TRACEPOINT,

		.read_format	= PERF_FORMAT_ID,

		.sample_type	= PERF_SAMPLE_ID,

		.watermark	= 0,

	};

	cpu_set_t cpu_set;

	const char *syscall_names[] = { "getsid", "getppid", "getpgrp",

					"getpgid", };

	pid_t (*syscalls[])(void) = { (void *)getsid, getppid, getpgrp,

				      (void*)getpgid };

#define nsyscalls ARRAY_SIZE(syscall_names)

	int ids[nsyscalls];

	unsigned int nr_events[nsyscalls],

		     expected_nr_events[nsyscalls], i, j;

	struct perf_evsel *evsels[nsyscalls], *evsel;



	for (i = 0; i < nsyscalls; ++i) {

		char name[64];



		snprintf(name, sizeof(name), "sys_enter_%s", syscall_names[i]);

		ids[i] = trace_event__id(name);

		if (ids[i] < 0) {

			pr_debug("Is debugfs mounted on /sys/kernel/debug?\n");

			return -1;

		}

		nr_events[i] = 0;

		expected_nr_events[i] = random() % 257;

	}



	threads = thread_map__new(-1, getpid(), UINT_MAX);

	if (threads == NULL) {

		pr_debug("thread_map__new\n");

		return -1;

	}



	cpus = cpu_map__new(NULL);

	if (cpus == NULL) {

		pr_debug("cpu_map__new\n");

		goto out_free_threads;

	}



	CPU_ZERO(&cpu_set);

	CPU_SET(cpus->map[0], &cpu_set);

	sched_setaffinity(0, sizeof(cpu_set), &cpu_set);

	if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {

		pr_debug("sched_setaffinity() failed on CPU %d: %s ",

			 cpus->map[0], strerror(errno));

		goto out_free_cpus;

	}



	evlist = perf_evlist__new(cpus, threads);

	if (evlist == NULL) {

		pr_debug("perf_evlist__new\n");

		goto out_free_cpus;

	}



	/* anonymous union fields, can't be initialized above */

	attr.wakeup_events = 1;

	attr.sample_period = 1;



	for (i = 0; i < nsyscalls; ++i) {

		attr.config = ids[i];

		evsels[i] = perf_evsel__new(&attr, i);

		if (evsels[i] == NULL) {

			pr_debug("perf_evsel__new\n");

			goto out_free_evlist;

		}



		perf_evlist__add(evlist, evsels[i]);



		if (perf_evsel__open(evsels[i], cpus, threads) < 0) {

			pr_debug("failed to open counter: %s, "

				 "tweak /proc/sys/kernel/perf_event_paranoid?\n",

				 strerror(errno));

			goto out_close_fd;

		}

	}



	if (perf_evlist__mmap(evlist, 128, true) < 0) {

		pr_debug("failed to mmap events: %d (%s)\n", errno,

			 strerror(errno));

		goto out_close_fd;

	}



	for (i = 0; i < nsyscalls; ++i)

		for (j = 0; j < expected_nr_events[i]; ++j) {

			int foo = syscalls[i]();

			++foo;

		}



	while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {

		struct perf_sample sample;



		if (event->header.type != PERF_RECORD_SAMPLE) {

			pr_debug("unexpected %s event\n",

				 perf_event__name(event->header.type));

			goto out_munmap;

		}



		err = perf_evlist__parse_sample(evlist, event, &sample);

		if (err) {

			pr_err("Can't parse sample, err = %d\n", err);

			goto out_munmap;

		}



		evsel = perf_evlist__id2evsel(evlist, sample.id);

		if (evsel == NULL) {

			pr_debug("event with id %" PRIu64

				 " doesn't map to an evsel\n", sample.id);

			goto out_munmap;

		}

		nr_events[evsel->idx]++;

	}



	list_for_each_entry(evsel, &evlist->entries, node) {

		if (nr_events[evsel->idx] != expected_nr_events[evsel->idx]) {

			pr_debug("expected %d %s events, got %d\n",

				 expected_nr_events[evsel->idx],

				 perf_evsel__name(evsel), nr_events[evsel->idx]);

			goto out_munmap;

		}

	}



	err = 0;

out_munmap:

	perf_evlist__munmap(evlist);

out_close_fd:

	for (i = 0; i < nsyscalls; ++i)

		perf_evsel__close_fd(evsels[i], 1, threads->nr);

out_free_evlist:

	perf_evlist__delete(evlist);

out_free_cpus:

	cpu_map__delete(cpus);

out_free_threads:

	thread_map__delete(threads);

	return err;

}

tools/perf/tests/tests.h

+1 −0
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ 
int test__vmlinux_matches_kallsyms(void);

int test__open_syscall_event(void);

int test__open_syscall_event_on_all_cpus(void);

int test__basic_mmap(void);



/* Util */

int trace_event__id(const char *evname);