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linux/tools/perf/tests/hists_cumulate.c
Jiri Olsa b39b839309 perf tools: Add parse_events_error interface 
Adding support to return error information from parse_events function.
Following struct will be populated by parse_events function on return:

  struct parse_events_error {
    int   idx;
    char *str;
    char *help;
  };

where 'idx' is the position in the string where the parsing failed,
'str' contains dynamically allocated error string describing the error
and 'help' is optional help string.

The change contains reporting function, which currently does not display
anything. The code changes to supply error data for specific event types
are coming in next patches. However this is what the expected output is:

  $ sudo perf record -e 'sched:krava' ls
  event syntax error: 'sched:krava'
                       \___ unknown tracepoint
  ...

  $ perf record -e 'cpu/even=0x1/' ls
  event syntax error: 'cpu/even=0x1/'
                           \___ unknown term

  valid terms: pc,any,inv,edge,cmask,event,in_tx,ldlat,umask,in_tx_cp,offcore_rsp,config,config1,config2,name,period,branch_type
  ...

  $ perf record -e cycles,cache-mises ls
  event syntax error: '..es,cache-mises'
                                 \___ parser error
  ...

The output functions cut the beginning of the event string so the error
starts up to 10th character and cut the end of the string of it crosses
the terminal width.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1429729824-13932-2-git-send-email-jolsa@kernel.org
[ Renamed 'error' variables to 'err', not to clash with util.h error() ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-04-29 10:37:58 -03:00

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#include "perf.h"
#include "util/debug.h"
#include "util/symbol.h"
#include "util/sort.h"
#include "util/evsel.h"
#include "util/evlist.h"
#include "util/machine.h"
#include "util/thread.h"
#include "util/parse-events.h"
#include "tests/tests.h"
#include "tests/hists_common.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 casted 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 perf_evsel *evsel = hists_to_evsel(hists);
struct perf_sample sample = { .period = 1000, };
size_t i;
for (i = 0; i < ARRAY_SIZE(fake_samples); i++) {
const union perf_event event = {
.header = {
.misc = PERF_RECORD_MISC_USER,
},
};
struct hist_entry_iter iter = {
.hide_unresolved = false,
};
if (symbol_conf.cumulate_callchain)
iter.ops = &hist_iter_cumulative;
else
iter.ops = &hist_iter_normal;
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 (perf_event__preprocess_sample(&event, machine, &al,
&sample) < 0)
goto out;
if (hist_entry_iter__add(&iter, &al, evsel, &sample,
PERF_MAX_STACK_DEPTH, NULL) < 0)
goto out;
fake_samples[i].thread = al.thread;
fake_samples[i].map = al.map;
fake_samples[i].sym = al.sym;
}
return TEST_OK;
out:
pr_debug("Not enough memory for adding a hist entry\n");
return TEST_FAIL;
}
static void del_hist_entries(struct hists *hists)
{
struct hist_entry *he;
struct rb_root *root_in;
struct rb_root *root_out;
struct rb_node *node;
if (sort__need_collapse)
root_in = &hists->entries_collapsed;
else
root_in = hists->entries_in;
root_out = &hists->entries;
while (!RB_EMPTY_ROOT(root_out)) {
node = rb_first(root_out);
he = rb_entry(node, struct hist_entry, rb_node);
rb_erase(node, root_out);
rb_erase(&he->rb_node_in, root_in);
hist_entry__delete(he);
}
}
typedef int (*test_fn_t)(struct perf_evsel *, struct machine *);
#define COMM(he) (thread__comm_str(he->thread))
#define DSO(he) (he->ms.map->dso->short_name)
#define SYM(he) (he->ms.sym->name)
#define CPU(he) (he->cpu)
#define PID(he) (he->thread->tid)
#define DEPTH(he) (he->callchain->max_depth)
#define CDSO(cl) (cl->ms.map->dso->short_name)
#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);
hists__output_resort(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;
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;
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 perf_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;
setup_sorting();
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;
}
/* callcain + NO children */
static int test2(struct perf_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;
setup_sorting();
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 perf_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;
setup_sorting();
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 perf_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;
setup_sorting();
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;
}
int test__hists_cumulate(void)
{
int err = TEST_FAIL;
struct machines machines;
struct machine *machine;
struct perf_evsel *evsel;
struct perf_evlist *evlist = perf_evlist__new();
size_t i;
test_fn_t testcases[] = {
test1,
test2,
test3,
test4,
};
TEST_ASSERT_VAL("No memory", evlist);
err = parse_events(evlist, "cpu-clock", NULL);
if (err)
goto out;
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 = perf_evlist__first(evlist);
for (i = 0; i < ARRAY_SIZE(testcases); i++) {
err = testcases[i](evsel, machine);
if (err < 0)
break;
}
out:
/* tear down everything */
perf_evlist__delete(evlist);
machines__exit(&machines);
return err;
}
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