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kernel/tools/perf/tests/hists_cumulate.c

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21 KiB
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// SPDX-License-Identifier: GPL-2.0
#include "util/debug.h"
#include "util/dso.h"
#include "util/event.h"
#include "util/map.h"
#include "util/symbol.h"
#include "util/sort.h"
#include "util/evsel.h"
#include "util/evlist.h"
#include "util/machine.h"
#include "util/parse-events.h"
#include "util/thread.h"
#include "tests/tests.h"
#include "tests/hists_common.h"
#include <linux/kernel.h>
struct sample {
u32 pid;
u64 ip;
struct thread *thread;
struct map *map;
struct symbol *sym;
};
/* For the numbers, see hists_common.c */
static struct sample fake_samples[] = {
/* perf [kernel] schedule() */
{ .pid = FAKE_PID_PERF1, .ip = FAKE_IP_KERNEL_SCHEDULE, },
/* perf [perf] main() */
{ .pid = FAKE_PID_PERF1, .ip = FAKE_IP_PERF_MAIN, },
/* perf [perf] cmd_record() */
{ .pid = FAKE_PID_PERF1, .ip = FAKE_IP_PERF_CMD_RECORD, },
/* perf [libc] malloc() */
{ .pid = FAKE_PID_PERF1, .ip = FAKE_IP_LIBC_MALLOC, },
/* perf [libc] free() */
{ .pid = FAKE_PID_PERF1, .ip = FAKE_IP_LIBC_FREE, },
/* perf [perf] main() */
{ .pid = FAKE_PID_PERF2, .ip = FAKE_IP_PERF_MAIN, },
/* perf [kernel] page_fault() */
{ .pid = FAKE_PID_PERF2, .ip = FAKE_IP_KERNEL_PAGE_FAULT, },
/* bash [bash] main() */
{ .pid = FAKE_PID_BASH, .ip = FAKE_IP_BASH_MAIN, },
/* bash [bash] xmalloc() */
{ .pid = FAKE_PID_BASH, .ip = FAKE_IP_BASH_XMALLOC, },
/* bash [kernel] page_fault() */
{ .pid = FAKE_PID_BASH, .ip = FAKE_IP_KERNEL_PAGE_FAULT, },
};
/*
* Will be cast to struct ip_callchain which has all 64 bit entries
* of nr and ips[].
*/
static u64 fake_callchains[][10] = {
/* schedule => run_command => main */
{ 3, FAKE_IP_KERNEL_SCHEDULE, FAKE_IP_PERF_RUN_COMMAND, FAKE_IP_PERF_MAIN, },
/* main */
{ 1, FAKE_IP_PERF_MAIN, },
/* cmd_record => run_command => main */
{ 3, FAKE_IP_PERF_CMD_RECORD, FAKE_IP_PERF_RUN_COMMAND, FAKE_IP_PERF_MAIN, },
/* malloc => cmd_record => run_command => main */
{ 4, FAKE_IP_LIBC_MALLOC, FAKE_IP_PERF_CMD_RECORD, FAKE_IP_PERF_RUN_COMMAND,
FAKE_IP_PERF_MAIN, },
/* free => cmd_record => run_command => main */
{ 4, FAKE_IP_LIBC_FREE, FAKE_IP_PERF_CMD_RECORD, FAKE_IP_PERF_RUN_COMMAND,
FAKE_IP_PERF_MAIN, },
/* main */
{ 1, FAKE_IP_PERF_MAIN, },
/* page_fault => sys_perf_event_open => run_command => main */
{ 4, FAKE_IP_KERNEL_PAGE_FAULT, FAKE_IP_KERNEL_SYS_PERF_EVENT_OPEN,
FAKE_IP_PERF_RUN_COMMAND, FAKE_IP_PERF_MAIN, },
/* main */
{ 1, FAKE_IP_BASH_MAIN, },
/* xmalloc => malloc => xmalloc => malloc => xmalloc => main */
{ 6, FAKE_IP_BASH_XMALLOC, FAKE_IP_LIBC_MALLOC, FAKE_IP_BASH_XMALLOC,
FAKE_IP_LIBC_MALLOC, FAKE_IP_BASH_XMALLOC, FAKE_IP_BASH_MAIN, },
/* page_fault => malloc => main */
{ 3, FAKE_IP_KERNEL_PAGE_FAULT, FAKE_IP_LIBC_MALLOC, FAKE_IP_BASH_MAIN, },
};
static int add_hist_entries(struct hists *hists, struct machine *machine)
{
struct addr_location al;
struct evsel *evsel = hists_to_evsel(hists);
struct perf_sample sample = { .period = 1000, };
size_t i;
addr_location__init(&al);
for (i = 0; i < ARRAY_SIZE(fake_samples); i++) {
struct hist_entry_iter iter = {
.evsel = evsel,
.sample = &sample,
.hide_unresolved = false,
};
if (symbol_conf.cumulate_callchain)
iter.ops = &hist_iter_cumulative;
else
iter.ops = &hist_iter_normal;
sample.cpumode = PERF_RECORD_MISC_USER;
sample.pid = fake_samples[i].pid;
sample.tid = fake_samples[i].pid;
sample.ip = fake_samples[i].ip;
sample.callchain = (struct ip_callchain *)fake_callchains[i];
if (machine__resolve(machine, &al, &sample) < 0)
goto out;
if (hist_entry_iter__add(&iter, &al, sysctl_perf_event_max_stack,
NULL) < 0) {
goto out;
}
thread__put(fake_samples[i].thread);
fake_samples[i].thread = thread__get(al.thread);
map__put(fake_samples[i].map);
fake_samples[i].map = map__get(al.map);
fake_samples[i].sym = al.sym;
}
addr_location__exit(&al);
return TEST_OK;
out:
pr_debug("Not enough memory for adding a hist entry\n");
addr_location__exit(&al);
return TEST_FAIL;
}
static void del_hist_entries(struct hists *hists)
{
struct hist_entry *he;
struct rb_root_cached *root_in;
struct rb_root_cached *root_out;
struct rb_node *node;
if (hists__has(hists, need_collapse))
root_in = &hists->entries_collapsed;
else
root_in = hists->entries_in;
root_out = &hists->entries;
while (!RB_EMPTY_ROOT(&root_out->rb_root)) {
node = rb_first_cached(root_out);
he = rb_entry(node, struct hist_entry, rb_node);
rb_erase_cached(node, root_out);
rb_erase_cached(&he->rb_node_in, root_in);
hist_entry__delete(he);
}
}
static void put_fake_samples(void)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(fake_samples); i++) {
map__zput(fake_samples[i].map);
thread__zput(fake_samples[i].thread);
}
}
typedef int (*test_fn_t)(struct evsel *, struct machine *);
#define COMM(he) (thread__comm_str(he->thread))
#define DSO(he) (dso__short_name(map__dso(he->ms.map)))
#define SYM(he) (he->ms.sym->name)
#define CPU(he) (he->cpu)
#define DEPTH(he) (he->callchain->max_depth)
#define CDSO(cl) (dso__short_name(map__dso(cl->ms.map)))
#define CSYM(cl) (cl->ms.sym->name)
struct result {
u64 children;
u64 self;
const char *comm;
const char *dso;
const char *sym;
};
struct callchain_result {
u64 nr;
struct {
const char *dso;
const char *sym;
} node[10];
};
static int do_test(struct hists *hists, struct result *expected, size_t nr_expected,
struct callchain_result *expected_callchain, size_t nr_callchain)
{
char buf[32];
size_t i, c;
struct hist_entry *he;
struct rb_root *root;
struct rb_node *node;
struct callchain_node *cnode;
struct callchain_list *clist;
/*
* adding and deleting hist entries must be done outside of this
* function since TEST_ASSERT_VAL() returns in case of failure.
*/
hists__collapse_resort(hists, NULL);
evsel__output_resort(hists_to_evsel(hists), NULL);
if (verbose > 2) {
pr_info("use callchain: %d, cumulate callchain: %d\n",
symbol_conf.use_callchain,
symbol_conf.cumulate_callchain);
print_hists_out(hists);
}
root = &hists->entries.rb_root;
for (node = rb_first(root), i = 0;
node && (he = rb_entry(node, struct hist_entry, rb_node));
node = rb_next(node), i++) {
scnprintf(buf, sizeof(buf), "Invalid hist entry #%zd", i);
TEST_ASSERT_VAL("Incorrect number of hist entry",
i < nr_expected);
TEST_ASSERT_VAL(buf, he->stat.period == expected[i].self &&
!strcmp(COMM(he), expected[i].comm) &&
!strcmp(DSO(he), expected[i].dso) &&
!strcmp(SYM(he), expected[i].sym));
if (symbol_conf.cumulate_callchain)
TEST_ASSERT_VAL(buf, he->stat_acc->period == expected[i].children);
if (!symbol_conf.use_callchain)
continue;
/* check callchain entries */
root = &he->callchain->node.rb_root;
TEST_ASSERT_VAL("callchains expected", !RB_EMPTY_ROOT(root));
cnode = rb_entry(rb_first(root), struct callchain_node, rb_node);
c = 0;
list_for_each_entry(clist, &cnode->val, list) {
scnprintf(buf, sizeof(buf), "Invalid callchain entry #%zd/%zd", i, c);
TEST_ASSERT_VAL("Incorrect number of callchain entry",
c < expected_callchain[i].nr);
TEST_ASSERT_VAL(buf,
!strcmp(CDSO(clist), expected_callchain[i].node[c].dso) &&
!strcmp(CSYM(clist), expected_callchain[i].node[c].sym));
c++;
}
/* TODO: handle multiple child nodes properly */
TEST_ASSERT_VAL("Incorrect number of callchain entry",
c <= expected_callchain[i].nr);
}
TEST_ASSERT_VAL("Incorrect number of hist entry",
i == nr_expected);
TEST_ASSERT_VAL("Incorrect number of callchain entry",
!symbol_conf.use_callchain || nr_expected == nr_callchain);
return 0;
}
/* NO callchain + NO children */
static int test1(struct evsel *evsel, struct machine *machine)
{
int err;
struct hists *hists = evsel__hists(evsel);
/*
* expected output:
*
* Overhead Command Shared Object Symbol
* ======== ======= ============= ==============
* 20.00% perf perf [.] main
* 10.00% bash [kernel] [k] page_fault
* 10.00% bash bash [.] main
* 10.00% bash bash [.] xmalloc
* 10.00% perf [kernel] [k] page_fault
* 10.00% perf [kernel] [k] schedule
* 10.00% perf libc [.] free
* 10.00% perf libc [.] malloc
* 10.00% perf perf [.] cmd_record
*/
struct result expected[] = {
{ 0, 2000, "perf", "perf", "main" },
{ 0, 1000, "bash", "[kernel]", "page_fault" },
{ 0, 1000, "bash", "bash", "main" },
{ 0, 1000, "bash", "bash", "xmalloc" },
{ 0, 1000, "perf", "[kernel]", "page_fault" },
{ 0, 1000, "perf", "[kernel]", "schedule" },
{ 0, 1000, "perf", "libc", "free" },
{ 0, 1000, "perf", "libc", "malloc" },
{ 0, 1000, "perf", "perf", "cmd_record" },
};
symbol_conf.use_callchain = false;
symbol_conf.cumulate_callchain = false;
evsel__reset_sample_bit(evsel, CALLCHAIN);
setup_sorting(NULL);
callchain_register_param(&callchain_param);
err = add_hist_entries(hists, machine);
if (err < 0)
goto out;
err = do_test(hists, expected, ARRAY_SIZE(expected), NULL, 0);
out:
del_hist_entries(hists);
reset_output_field();
return err;
}
/* callchain + NO children */
static int test2(struct evsel *evsel, struct machine *machine)
{
int err;
struct hists *hists = evsel__hists(evsel);
/*
* expected output:
*
* Overhead Command Shared Object Symbol
* ======== ======= ============= ==============
* 20.00% perf perf [.] main
* |
* --- main
*
* 10.00% bash [kernel] [k] page_fault
* |
* --- page_fault
* malloc
* main
*
* 10.00% bash bash [.] main
* |
* --- main
*
* 10.00% bash bash [.] xmalloc
* |
* --- xmalloc
* malloc
* xmalloc <--- NOTE: there's a cycle
* malloc
* xmalloc
* main
*
* 10.00% perf [kernel] [k] page_fault
* |
* --- page_fault
* sys_perf_event_open
* run_command
* main
*
* 10.00% perf [kernel] [k] schedule
* |
* --- schedule
* run_command
* main
*
* 10.00% perf libc [.] free
* |
* --- free
* cmd_record
* run_command
* main
*
* 10.00% perf libc [.] malloc
* |
* --- malloc
* cmd_record
* run_command
* main
*
* 10.00% perf perf [.] cmd_record
* |
* --- cmd_record
* run_command
* main
*
*/
struct result expected[] = {
{ 0, 2000, "perf", "perf", "main" },
{ 0, 1000, "bash", "[kernel]", "page_fault" },
{ 0, 1000, "bash", "bash", "main" },
{ 0, 1000, "bash", "bash", "xmalloc" },
{ 0, 1000, "perf", "[kernel]", "page_fault" },
{ 0, 1000, "perf", "[kernel]", "schedule" },
{ 0, 1000, "perf", "libc", "free" },
{ 0, 1000, "perf", "libc", "malloc" },
{ 0, 1000, "perf", "perf", "cmd_record" },
};
struct callchain_result expected_callchain[] = {
{
1, { { "perf", "main" }, },
},
{
3, { { "[kernel]", "page_fault" },
{ "libc", "malloc" },
{ "bash", "main" }, },
},
{
1, { { "bash", "main" }, },
},
{
6, { { "bash", "xmalloc" },
{ "libc", "malloc" },
{ "bash", "xmalloc" },
{ "libc", "malloc" },
{ "bash", "xmalloc" },
{ "bash", "main" }, },
},
{
4, { { "[kernel]", "page_fault" },
{ "[kernel]", "sys_perf_event_open" },
{ "perf", "run_command" },
{ "perf", "main" }, },
},
{
3, { { "[kernel]", "schedule" },
{ "perf", "run_command" },
{ "perf", "main" }, },
},
{
4, { { "libc", "free" },
{ "perf", "cmd_record" },
{ "perf", "run_command" },
{ "perf", "main" }, },
},
{
4, { { "libc", "malloc" },
{ "perf", "cmd_record" },
{ "perf", "run_command" },
{ "perf", "main" }, },
},
{
3, { { "perf", "cmd_record" },
{ "perf", "run_command" },
{ "perf", "main" }, },
},
};
symbol_conf.use_callchain = true;
symbol_conf.cumulate_callchain = false;
evsel__set_sample_bit(evsel, CALLCHAIN);
setup_sorting(NULL);
callchain_register_param(&callchain_param);
err = add_hist_entries(hists, machine);
if (err < 0)
goto out;
err = do_test(hists, expected, ARRAY_SIZE(expected),
expected_callchain, ARRAY_SIZE(expected_callchain));
out:
del_hist_entries(hists);
reset_output_field();
return err;
}
/* NO callchain + children */
static int test3(struct evsel *evsel, struct machine *machine)
{
int err;
struct hists *hists = evsel__hists(evsel);
/*
* expected output:
*
* Children Self Command Shared Object Symbol
* ======== ======== ======= ============= =======================
* 70.00% 20.00% perf perf [.] main
* 50.00% 0.00% perf perf [.] run_command
* 30.00% 10.00% bash bash [.] main
* 30.00% 10.00% perf perf [.] cmd_record
* 20.00% 0.00% bash libc [.] malloc
* 10.00% 10.00% bash [kernel] [k] page_fault
* 10.00% 10.00% bash bash [.] xmalloc
* 10.00% 10.00% perf [kernel] [k] page_fault
* 10.00% 10.00% perf libc [.] malloc
* 10.00% 10.00% perf [kernel] [k] schedule
* 10.00% 10.00% perf libc [.] free
* 10.00% 0.00% perf [kernel] [k] sys_perf_event_open
*/
struct result expected[] = {
{ 7000, 2000, "perf", "perf", "main" },
{ 5000, 0, "perf", "perf", "run_command" },
{ 3000, 1000, "bash", "bash", "main" },
{ 3000, 1000, "perf", "perf", "cmd_record" },
{ 2000, 0, "bash", "libc", "malloc" },
{ 1000, 1000, "bash", "[kernel]", "page_fault" },
{ 1000, 1000, "bash", "bash", "xmalloc" },
{ 1000, 1000, "perf", "[kernel]", "page_fault" },
{ 1000, 1000, "perf", "[kernel]", "schedule" },
{ 1000, 1000, "perf", "libc", "free" },
{ 1000, 1000, "perf", "libc", "malloc" },
{ 1000, 0, "perf", "[kernel]", "sys_perf_event_open" },
};
symbol_conf.use_callchain = false;
symbol_conf.cumulate_callchain = true;
evsel__reset_sample_bit(evsel, CALLCHAIN);
setup_sorting(NULL);
callchain_register_param(&callchain_param);
err = add_hist_entries(hists, machine);
if (err < 0)
goto out;
err = do_test(hists, expected, ARRAY_SIZE(expected), NULL, 0);
out:
del_hist_entries(hists);
reset_output_field();
return err;
}
/* callchain + children */
static int test4(struct evsel *evsel, struct machine *machine)
{
int err;
struct hists *hists = evsel__hists(evsel);
/*
* expected output:
*
* Children Self Command Shared Object Symbol
* ======== ======== ======= ============= =======================
* 70.00% 20.00% perf perf [.] main
* |
* --- main
*
* 50.00% 0.00% perf perf [.] run_command
* |
* --- run_command
* main
*
* 30.00% 10.00% bash bash [.] main
* |
* --- main
*
* 30.00% 10.00% perf perf [.] cmd_record
* |
* --- cmd_record
* run_command
* main
*
* 20.00% 0.00% bash libc [.] malloc
* |
* --- malloc
* |
* |--50.00%-- xmalloc
* | main
* --50.00%-- main
*
* 10.00% 10.00% bash [kernel] [k] page_fault
* |
* --- page_fault
* malloc
* main
*
* 10.00% 10.00% bash bash [.] xmalloc
* |
* --- xmalloc
* malloc
* xmalloc <--- NOTE: there's a cycle
* malloc
* xmalloc
* main
*
* 10.00% 0.00% perf [kernel] [k] sys_perf_event_open
* |
* --- sys_perf_event_open
* run_command
* main
*
* 10.00% 10.00% perf [kernel] [k] page_fault
* |
* --- page_fault
* sys_perf_event_open
* run_command
* main
*
* 10.00% 10.00% perf [kernel] [k] schedule
* |
* --- schedule
* run_command
* main
*
* 10.00% 10.00% perf libc [.] free
* |
* --- free
* cmd_record
* run_command
* main
*
* 10.00% 10.00% perf libc [.] malloc
* |
* --- malloc
* cmd_record
* run_command
* main
*
*/
struct result expected[] = {
{ 7000, 2000, "perf", "perf", "main" },
{ 5000, 0, "perf", "perf", "run_command" },
{ 3000, 1000, "bash", "bash", "main" },
{ 3000, 1000, "perf", "perf", "cmd_record" },
{ 2000, 0, "bash", "libc", "malloc" },
{ 1000, 1000, "bash", "[kernel]", "page_fault" },
{ 1000, 1000, "bash", "bash", "xmalloc" },
{ 1000, 0, "perf", "[kernel]", "sys_perf_event_open" },
{ 1000, 1000, "perf", "[kernel]", "page_fault" },
{ 1000, 1000, "perf", "[kernel]", "schedule" },
{ 1000, 1000, "perf", "libc", "free" },
{ 1000, 1000, "perf", "libc", "malloc" },
};
struct callchain_result expected_callchain[] = {
{
1, { { "perf", "main" }, },
},
{
2, { { "perf", "run_command" },
{ "perf", "main" }, },
},
{
1, { { "bash", "main" }, },
},
{
3, { { "perf", "cmd_record" },
{ "perf", "run_command" },
{ "perf", "main" }, },
},
{
4, { { "libc", "malloc" },
{ "bash", "xmalloc" },
{ "bash", "main" },
{ "bash", "main" }, },
},
{
3, { { "[kernel]", "page_fault" },
{ "libc", "malloc" },
{ "bash", "main" }, },
},
{
6, { { "bash", "xmalloc" },
{ "libc", "malloc" },
{ "bash", "xmalloc" },
{ "libc", "malloc" },
{ "bash", "xmalloc" },
{ "bash", "main" }, },
},
{
3, { { "[kernel]", "sys_perf_event_open" },
{ "perf", "run_command" },
{ "perf", "main" }, },
},
{
4, { { "[kernel]", "page_fault" },
{ "[kernel]", "sys_perf_event_open" },
{ "perf", "run_command" },
{ "perf", "main" }, },
},
{
3, { { "[kernel]", "schedule" },
{ "perf", "run_command" },
{ "perf", "main" }, },
},
{
4, { { "libc", "free" },
{ "perf", "cmd_record" },
{ "perf", "run_command" },
{ "perf", "main" }, },
},
{
4, { { "libc", "malloc" },
{ "perf", "cmd_record" },
{ "perf", "run_command" },
{ "perf", "main" }, },
},
};
symbol_conf.use_callchain = true;
symbol_conf.cumulate_callchain = true;
evsel__set_sample_bit(evsel, CALLCHAIN);
setup_sorting(NULL);
callchain_param = callchain_param_default;
callchain_register_param(&callchain_param);
err = add_hist_entries(hists, machine);
if (err < 0)
goto out;
err = do_test(hists, expected, ARRAY_SIZE(expected),
expected_callchain, ARRAY_SIZE(expected_callchain));
out:
del_hist_entries(hists);
reset_output_field();
return err;
}
static int test__hists_cumulate(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
{
int err = TEST_FAIL;
struct machines machines;
struct machine *machine;
struct evsel *evsel;
struct evlist *evlist = evlist__new();
size_t i;
test_fn_t testcases[] = {
test1,
test2,
test3,
test4,
};
TEST_ASSERT_VAL("No memory", evlist);
err = parse_event(evlist, "cpu-clock");
if (err)
goto out;
err = TEST_FAIL;
machines__init(&machines);
/* setup threads/dso/map/symbols also */
machine = setup_fake_machine(&machines);
if (!machine)
goto out;
if (verbose > 1)
machine__fprintf(machine, stderr);
evsel = evlist__first(evlist);
for (i = 0; i < ARRAY_SIZE(testcases); i++) {
err = testcases[i](evsel, machine);
if (err < 0)
break;
}
out:
/* tear down everything */
evlist__delete(evlist);
machines__exit(&machines);
put_fake_samples();
return err;
}
DEFINE_SUITE("Cumulate child hist entries", hists_cumulate);
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