Release 4.18 tools/perf/builtin-lock.c
// SPDX-License-Identifier: GPL-2.0
#include <errno.h>
#include <inttypes.h>
#include "builtin.h"
#include "perf.h"
#include "util/evlist.h"
#include "util/evsel.h"
#include "util/util.h"
#include "util/cache.h"
#include "util/symbol.h"
#include "util/thread.h"
#include "util/header.h"
#include <subcmd/parse-options.h>
#include "util/trace-event.h"
#include "util/debug.h"
#include "util/session.h"
#include "util/tool.h"
#include "util/data.h"
#include <sys/types.h>
#include <sys/prctl.h>
#include <semaphore.h>
#include <pthread.h>
#include <math.h>
#include <limits.h>
#include <linux/list.h>
#include <linux/hash.h>
#include <linux/kernel.h>
static struct perf_session *session;
/* based on kernel/lockdep.c */
#define LOCKHASH_BITS 12
#define LOCKHASH_SIZE (1UL << LOCKHASH_BITS)
static struct list_head lockhash_table[LOCKHASH_SIZE];
#define __lockhashfn(key) hash_long((unsigned long)key, LOCKHASH_BITS)
#define lockhashentry(key) (lockhash_table + __lockhashfn((key)))
struct lock_stat {
struct list_head hash_entry;
struct rb_node rb; /* used for sorting */
/*
* FIXME: perf_evsel__intval() returns u64,
* so address of lockdep_map should be dealed as 64bit.
* Is there more better solution?
*/
void *addr; /* address of lockdep_map, used as ID */
char *name; /* for strcpy(), we cannot use const */
unsigned int nr_acquire;
unsigned int nr_acquired;
unsigned int nr_contended;
unsigned int nr_release;
unsigned int nr_readlock;
unsigned int nr_trylock;
/* these times are in nano sec. */
u64 avg_wait_time;
u64 wait_time_total;
u64 wait_time_min;
u64 wait_time_max;
int discard; /* flag of blacklist */
};
/*
* States of lock_seq_stat
*
* UNINITIALIZED is required for detecting first event of acquire.
* As the nature of lock events, there is no guarantee
* that the first event for the locks are acquire,
* it can be acquired, contended or release.
*/
#define SEQ_STATE_UNINITIALIZED 0
/* initial state */
#define SEQ_STATE_RELEASED 1
#define SEQ_STATE_ACQUIRING 2
#define SEQ_STATE_ACQUIRED 3
#define SEQ_STATE_READ_ACQUIRED 4
#define SEQ_STATE_CONTENDED 5
/*
* MAX_LOCK_DEPTH
* Imported from include/linux/sched.h.
* Should this be synchronized?
*/
#define MAX_LOCK_DEPTH 48
/*
* struct lock_seq_stat:
* Place to put on state of one lock sequence
* 1) acquire -> acquired -> release
* 2) acquire -> contended -> acquired -> release
* 3) acquire (with read or try) -> release
* 4) Are there other patterns?
*/
struct lock_seq_stat {
struct list_head list;
int state;
u64 prev_event_time;
void *addr;
int read_count;
};
struct thread_stat {
struct rb_node rb;
u32 tid;
struct list_head seq_list;
};
static struct rb_root thread_stats;
static struct thread_stat *thread_stat_find(u32 tid)
{
struct rb_node *node;
struct thread_stat *st;
node = thread_stats.rb_node;
while (node) {
st = container_of(node, struct thread_stat, rb);
if (st->tid == tid)
return st;
else if (tid < st->tid)
node = node->rb_left;
else
node = node->rb_right;
}
return NULL;
}
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| Hitoshi Mitake | 81 | 100.00% | 1 | 100.00% |
| Total | 81 | 100.00% | 1 | 100.00% |
static void thread_stat_insert(struct thread_stat *new)
{
struct rb_node **rb = &thread_stats.rb_node;
struct rb_node *parent = NULL;
struct thread_stat *p;
while (*rb) {
p = container_of(*rb, struct thread_stat, rb);
parent = *rb;
if (new->tid < p->tid)
rb = &(*rb)->rb_left;
else if (new->tid > p->tid)
rb = &(*rb)->rb_right;
else
BUG_ON("inserting invalid thread_stat\n");
}
rb_link_node(&new->rb, parent, rb);
rb_insert_color(&new->rb, &thread_stats);
}
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| Hitoshi Mitake | 129 | 100.00% | 1 | 100.00% |
| Total | 129 | 100.00% | 1 | 100.00% |
static struct thread_stat *thread_stat_findnew_after_first(u32 tid)
{
struct thread_stat *st;
st = thread_stat_find(tid);
if (st)
return st;
st = zalloc(sizeof(struct thread_stat));
if (!st) {
pr_err("memory allocation failed\n");
return NULL;
}
st->tid = tid;
INIT_LIST_HEAD(&st->seq_list);
thread_stat_insert(st);
return st;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 72 | 92.31% | 1 | 50.00% |
| David Ahern | 6 | 7.69% | 1 | 50.00% |
| Total | 78 | 100.00% | 2 | 100.00% |
static struct thread_stat *thread_stat_findnew_first(u32 tid);
static struct thread_stat *(*thread_stat_findnew)(u32 tid) =
thread_stat_findnew_first;
static struct thread_stat *thread_stat_findnew_first(u32 tid)
{
struct thread_stat *st;
st = zalloc(sizeof(struct thread_stat));
if (!st) {
pr_err("memory allocation failed\n");
return NULL;
}
st->tid = tid;
INIT_LIST_HEAD(&st->seq_list);
rb_link_node(&st->rb, NULL, &thread_stats.rb_node);
rb_insert_color(&st->rb, &thread_stats);
thread_stat_findnew = thread_stat_findnew_after_first;
return st;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 83 | 93.26% | 2 | 66.67% |
| David Ahern | 6 | 6.74% | 1 | 33.33% |
| Total | 89 | 100.00% | 3 | 100.00% |
/* build simple key function one is bigger than two */
#define SINGLE_KEY(member) \
static int lock_stat_key_ ## member(struct lock_stat *one, \
struct lock_stat *two) \
{ \
return one->member > two->member; \
}
SINGLE_KEY(nr_acquired)
SINGLE_KEY(nr_contended)
SINGLE_KEY(avg_wait_time)
SINGLE_KEY(wait_time_total)
SINGLE_KEY(wait_time_max)
static int lock_stat_key_wait_time_min(struct lock_stat *one,
struct lock_stat *two)
{
u64 s1 = one->wait_time_min;
u64 s2 = two->wait_time_min;
if (s1 == ULLONG_MAX)
s1 = 0;
if (s2 == ULLONG_MAX)
s2 = 0;
return s1 > s2;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Marcin Ślusarz | 55 | 100.00% | 1 | 100.00% |
| Total | 55 | 100.00% | 1 | 100.00% |
struct lock_key {
/*
* name: the value for specify by user
* this should be simpler than raw name of member
* e.g. nr_acquired -> acquired, wait_time_total -> wait_total
*/
const char *name;
int (*key)(struct lock_stat*, struct lock_stat*);
};
static const char *sort_key = "acquired";
static int (*compare)(struct lock_stat *, struct lock_stat *);
static struct rb_root result;
/* place to store sorted data */
#define DEF_KEY_LOCK(name, fn_suffix) \
{ #name, lock_stat_key_ ## fn_suffix }
struct lock_key keys[] = {
DEF_KEY_LOCK(acquired, nr_acquired),
DEF_KEY_LOCK(contended, nr_contended),
DEF_KEY_LOCK(avg_wait, avg_wait_time),
DEF_KEY_LOCK(wait_total, wait_time_total),
DEF_KEY_LOCK(wait_min, wait_time_min),
DEF_KEY_LOCK(wait_max, wait_time_max),
/* extra comparisons much complicated should be here */
{ NULL, NULL }
};
static int select_key(void)
{
int i;
for (i = 0; keys[i].name; i++) {
if (!strcmp(keys[i].name, sort_key)) {
compare = keys[i].key;
return 0;
}
}
pr_err("Unknown compare key: %s\n", sort_key);
return -1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 59 | 85.51% | 1 | 50.00% |
| David Ahern | 10 | 14.49% | 1 | 50.00% |
| Total | 69 | 100.00% | 2 | 100.00% |
static void insert_to_result(struct lock_stat *st,
int (*bigger)(struct lock_stat *, struct lock_stat *))
{
struct rb_node **rb = &result.rb_node;
struct rb_node *parent = NULL;
struct lock_stat *p;
while (*rb) {
p = container_of(*rb, struct lock_stat, rb);
parent = *rb;
if (bigger(st, p))
rb = &(*rb)->rb_left;
else
rb = &(*rb)->rb_right;
}
rb_link_node(&st->rb, parent, rb);
rb_insert_color(&st->rb, &result);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 127 | 100.00% | 1 | 100.00% |
| Total | 127 | 100.00% | 1 | 100.00% |
/* returns left most element of result, and erase it */
static struct lock_stat *pop_from_result(void)
{
struct rb_node *node = result.rb_node;
if (!node)
return NULL;
while (node->rb_left)
node = node->rb_left;
rb_erase(node, &result);
return container_of(node, struct lock_stat, rb);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 58 | 100.00% | 1 | 100.00% |
| Total | 58 | 100.00% | 1 | 100.00% |
static struct lock_stat *lock_stat_findnew(void *addr, const char *name)
{
struct list_head *entry = lockhashentry(addr);
struct lock_stat *ret, *new;
list_for_each_entry(ret, entry, hash_entry) {
if (ret->addr == addr)
return ret;
}
new = zalloc(sizeof(struct lock_stat));
if (!new)
goto alloc_failed;
new->addr = addr;
new->name = zalloc(sizeof(char) * strlen(name) + 1);
if (!new->name) {
free(new);
goto alloc_failed;
}
strcpy(new->name, name);
new->wait_time_min = ULLONG_MAX;
list_add(&new->hash_entry, entry);
return new;
alloc_failed:
pr_err("memory allocation failed\n");
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 144 | 92.90% | 1 | 33.33% |
| Davidlohr Bueso A | 7 | 4.52% | 1 | 33.33% |
| David Ahern | 4 | 2.58% | 1 | 33.33% |
| Total | 155 | 100.00% | 3 | 100.00% |
struct trace_lock_handler {
int (*acquire_event)(struct perf_evsel *evsel,
struct perf_sample *sample);
int (*acquired_event)(struct perf_evsel *evsel,
struct perf_sample *sample);
int (*contended_event)(struct perf_evsel *evsel,
struct perf_sample *sample);
int (*release_event)(struct perf_evsel *evsel,
struct perf_sample *sample);
};
static struct lock_seq_stat *get_seq(struct thread_stat *ts, void *addr)
{
struct lock_seq_stat *seq;
list_for_each_entry(seq, &ts->seq_list, list) {
if (seq->addr == addr)
return seq;
}
seq = zalloc(sizeof(struct lock_seq_stat));
if (!seq) {
pr_err("memory allocation failed\n");
return NULL;
}
seq->state = SEQ_STATE_UNINITIALIZED;
seq->addr = addr;
list_add(&seq->list, &ts->seq_list);
return seq;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 90 | 92.78% | 1 | 50.00% |
| David Ahern | 7 | 7.22% | 1 | 50.00% |
| Total | 97 | 100.00% | 2 | 100.00% |
enum broken_state {
BROKEN_ACQUIRE,
BROKEN_ACQUIRED,
BROKEN_CONTENDED,
BROKEN_RELEASE,
BROKEN_MAX,
};
static int bad_hist[BROKEN_MAX];
enum acquire_flags {
TRY_LOCK = 1,
READ_LOCK = 2,
};
static int report_lock_acquire_event(struct perf_evsel *evsel,
struct perf_sample *sample)
{
void *addr;
struct lock_stat *ls;
struct thread_stat *ts;
struct lock_seq_stat *seq;
const char *name = perf_evsel__strval(evsel, sample, "name");
u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr");
int flag = perf_evsel__intval(evsel, sample, "flag");
memcpy(&addr, &tmp, sizeof(void *));
ls = lock_stat_findnew(addr, name);
if (!ls)
return -ENOMEM;
if (ls->discard)
return 0;
ts = thread_stat_findnew(sample->tid);
if (!ts)
return -ENOMEM;
seq = get_seq(ts, addr);
if (!seq)
return -ENOMEM;
switch (seq->state) {
case SEQ_STATE_UNINITIALIZED:
case SEQ_STATE_RELEASED:
if (!flag) {
seq->state = SEQ_STATE_ACQUIRING;
} else {
if (flag & TRY_LOCK)
ls->nr_trylock++;
if (flag & READ_LOCK)
ls->nr_readlock++;
seq->state = SEQ_STATE_READ_ACQUIRED;
seq->read_count = 1;
ls->nr_acquired++;
}
break;
case SEQ_STATE_READ_ACQUIRED:
if (flag & READ_LOCK) {
seq->read_count++;
ls->nr_acquired++;
goto end;
} else {
goto broken;
}
break;
case SEQ_STATE_ACQUIRED:
case SEQ_STATE_ACQUIRING:
case SEQ_STATE_CONTENDED:
broken:
/* broken lock sequence, discard it */
ls->discard = 1;
bad_hist[BROKEN_ACQUIRE]++;
list_del(&seq->list);
free(seq);
goto end;
default:
BUG_ON("Unknown state of lock sequence found!\n");
break;
}
ls->nr_acquire++;
seq->prev_event_time = sample->time;
end:
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 212 | 66.88% | 2 | 22.22% |
| Arnaldo Carvalho de Melo | 66 | 20.82% | 2 | 22.22% |
| David Ahern | 31 | 9.78% | 1 | 11.11% |
| Frédéric Weisbecker | 4 | 1.26% | 2 | 22.22% |
| Davidlohr Bueso A | 3 | 0.95% | 1 | 11.11% |
| Ingo Molnar | 1 | 0.32% | 1 | 11.11% |
| Total | 317 | 100.00% | 9 | 100.00% |
static int report_lock_acquired_event(struct perf_evsel *evsel,
struct perf_sample *sample)
{
void *addr;
struct lock_stat *ls;
struct thread_stat *ts;
struct lock_seq_stat *seq;
u64 contended_term;
const char *name = perf_evsel__strval(evsel, sample, "name");
u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr");
memcpy(&addr, &tmp, sizeof(void *));
ls = lock_stat_findnew(addr, name);
if (!ls)
return -ENOMEM;
if (ls->discard)
return 0;
ts = thread_stat_findnew(sample->tid);
if (!ts)
return -ENOMEM;
seq = get_seq(ts, addr);
if (!seq)
return -ENOMEM;
switch (seq->state) {
case SEQ_STATE_UNINITIALIZED:
/* orphan event, do nothing */
return 0;
case SEQ_STATE_ACQUIRING:
break;
case SEQ_STATE_CONTENDED:
contended_term = sample->time - seq->prev_event_time;
ls->wait_time_total += contended_term;
if (contended_term < ls->wait_time_min)
ls->wait_time_min = contended_term;
if (ls->wait_time_max < contended_term)
ls->wait_time_max = contended_term;
break;
case SEQ_STATE_RELEASED:
case SEQ_STATE_ACQUIRED:
case SEQ_STATE_READ_ACQUIRED:
/* broken lock sequence, discard it */
ls->discard = 1;
bad_hist[BROKEN_ACQUIRED]++;
list_del(&seq->list);
free(seq);
goto end;
default:
BUG_ON("Unknown state of lock sequence found!\n");
break;
}
seq->state = SEQ_STATE_ACQUIRED;
ls->nr_acquired++;
ls->avg_wait_time = ls->nr_contended ? ls->wait_time_total/ls->nr_contended : 0;
seq->prev_event_time = sample->time;
end:
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 182 | 61.49% | 2 | 22.22% |
| Arnaldo Carvalho de Melo | 57 | 19.26% | 2 | 22.22% |
| David Ahern | 34 | 11.49% | 1 | 11.11% |
| Davidlohr Bueso A | 21 | 7.09% | 2 | 22.22% |
| Ingo Molnar | 1 | 0.34% | 1 | 11.11% |
| Frédéric Weisbecker | 1 | 0.34% | 1 | 11.11% |
| Total | 296 | 100.00% | 9 | 100.00% |
static int report_lock_contended_event(struct perf_evsel *evsel,
struct perf_sample *sample)
{
void *addr;
struct lock_stat *ls;
struct thread_stat *ts;
struct lock_seq_stat *seq;
const char *name = perf_evsel__strval(evsel, sample, "name");
u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr");
memcpy(&addr, &tmp, sizeof(void *));
ls = lock_stat_findnew(addr, name);
if (!ls)
return -ENOMEM;
if (ls->discard)
return 0;
ts = thread_stat_findnew(sample->tid);
if (!ts)
return -ENOMEM;
seq = get_seq(ts, addr);
if (!seq)
return -ENOMEM;
switch (seq->state) {
case SEQ_STATE_UNINITIALIZED:
/* orphan event, do nothing */
return 0;
case SEQ_STATE_ACQUIRING:
break;
case SEQ_STATE_RELEASED:
case SEQ_STATE_ACQUIRED:
case SEQ_STATE_READ_ACQUIRED:
case SEQ_STATE_CONTENDED:
/* broken lock sequence, discard it */
ls->discard = 1;
bad_hist[BROKEN_CONTENDED]++;
list_del(&seq->list);
free(seq);
goto end;
default:
BUG_ON("Unknown state of lock sequence found!\n");
break;
}
seq->state = SEQ_STATE_CONTENDED;
ls->nr_contended++;
ls->avg_wait_time = ls->wait_time_total/ls->nr_contended;
seq->prev_event_time = sample->time;
end:
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 132 | 54.55% | 2 | 22.22% |
| Arnaldo Carvalho de Melo | 59 | 24.38% | 2 | 22.22% |
| David Ahern | 34 | 14.05% | 1 | 11.11% |
| Davidlohr Bueso A | 15 | 6.20% | 2 | 22.22% |
| Frédéric Weisbecker | 1 | 0.41% | 1 | 11.11% |
| Ingo Molnar | 1 | 0.41% | 1 | 11.11% |
| Total | 242 | 100.00% | 9 | 100.00% |
static int report_lock_release_event(struct perf_evsel *evsel,
struct perf_sample *sample)
{
void *addr;
struct lock_stat *ls;
struct thread_stat *ts;
struct lock_seq_stat *seq;
const char *name = perf_evsel__strval(evsel, sample, "name");
u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr");
memcpy(&addr, &tmp, sizeof(void *));
ls = lock_stat_findnew(addr, name);
if (!ls)
return -ENOMEM;
if (ls->discard)
return 0;
ts = thread_stat_findnew(sample->tid);
if (!ts)
return -ENOMEM;
seq = get_seq(ts, addr);
if (!seq)
return -ENOMEM;
switch (seq->state) {
case SEQ_STATE_UNINITIALIZED:
goto end;
case SEQ_STATE_ACQUIRED:
break;
case SEQ_STATE_READ_ACQUIRED:
seq->read_count--;
BUG_ON(seq->read_count < 0);
if (!seq->read_count) {
ls->nr_release++;
goto end;
}
break;
case SEQ_STATE_ACQUIRING:
case SEQ_STATE_CONTENDED:
case SEQ_STATE_RELEASED:
/* broken lock sequence, discard it */
ls->discard = 1;
bad_hist[BROKEN_RELEASE]++;
goto free_seq;
default:
BUG_ON("Unknown state of lock sequence found!\n");
break;
}
ls->nr_release++;
free_seq:
list_del(&seq->list);
free(seq);
end:
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 162 | 65.06% | 2 | 25.00% |
| Arnaldo Carvalho de Melo | 51 | 20.48% | 2 | 25.00% |
| David Ahern | 31 | 12.45% | 1 | 12.50% |
| Davidlohr Bueso A | 3 | 1.20% | 1 | 12.50% |
| Ingo Molnar | 1 | 0.40% | 1 | 12.50% |
| Frédéric Weisbecker | 1 | 0.40% | 1 | 12.50% |
| Total | 249 | 100.00% | 8 | 100.00% |
/* lock oriented handlers */
/* TODO: handlers for CPU oriented, thread oriented */
static struct trace_lock_handler report_lock_ops = {
.acquire_event = report_lock_acquire_event,
.acquired_event = report_lock_acquired_event,
.contended_event = report_lock_contended_event,
.release_event = report_lock_release_event,
};
static struct trace_lock_handler *trace_handler;
static int perf_evsel__process_lock_acquire(struct perf_evsel *evsel,
struct perf_sample *sample)
{
if (trace_handler->acquire_event)
return trace_handler->acquire_event(evsel, sample);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 22 | 62.86% | 1 | 25.00% |
| Arnaldo Carvalho de Melo | 9 | 25.71% | 2 | 50.00% |
| David Ahern | 4 | 11.43% | 1 | 25.00% |
| Total | 35 | 100.00% | 4 | 100.00% |
static int perf_evsel__process_lock_acquired(struct perf_evsel *evsel,
struct perf_sample *sample)
{
if (trace_handler->acquired_event)
return trace_handler->acquired_event(evsel, sample);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 18 | 51.43% | 2 | 50.00% |
| Hitoshi Mitake | 14 | 40.00% | 1 | 25.00% |
| David Ahern | 3 | 8.57% | 1 | 25.00% |
| Total | 35 | 100.00% | 4 | 100.00% |
static int perf_evsel__process_lock_contended(struct perf_evsel *evsel,
struct perf_sample *sample)
{
if (trace_handler->contended_event)
return trace_handler->contended_event(evsel, sample);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 20 | 57.14% | 3 | 60.00% |
| Hitoshi Mitake | 14 | 40.00% | 1 | 20.00% |
| David Ahern | 1 | 2.86% | 1 | 20.00% |
| Total | 35 | 100.00% | 5 | 100.00% |
static int perf_evsel__process_lock_release(struct perf_evsel *evsel,
struct perf_sample *sample)
{
if (trace_handler->release_event)
return trace_handler->release_event(evsel, sample);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 25 | 71.43% | 2 | 50.00% |
| Hitoshi Mitake | 8 | 22.86% | 1 | 25.00% |
| David Ahern | 2 | 5.71% | 1 | 25.00% |
| Total | 35 | 100.00% | 4 | 100.00% |
static void print_bad_events(int bad, int total)
{
/* Output for debug, this have to be removed */
int i;
const char *name[4] =
{ "acquire", "acquired", "contended", "release" };
pr_info("\n=== output for debug===\n\n");
pr_info("bad: %d, total: %d\n", bad, total);
pr_info("bad rate: %.2f %%\n", (double)bad / (double)total * 100);
pr_info("histogram of events caused bad sequence\n");
for (i = 0; i < BROKEN_MAX; i++)
pr_info(" %10s: %d\n", name[i], bad_hist[i]);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Frédéric Weisbecker | 97 | 98.98% | 2 | 66.67% |
| Davidlohr Bueso A | 1 | 1.02% | 1 | 33.33% |
| Total | 98 | 100.00% | 3 | 100.00% |
/* TODO: various way to print, coloring, nano or milli sec */
static void print_result(void)
{
struct lock_stat *st;
char cut_name[20];
int bad, total;
pr_info("%20s ", "Name");
pr_info("%10s ", "acquired");
pr_info("%10s ", "contended");
pr_info("%15s ", "avg wait (ns)");
pr_info("%15s ", "total wait (ns)");
pr_info("%15s ", "max wait (ns)");
pr_info("%15s ", "min wait (ns)");
pr_info("\n\n");
bad = total = 0;
while ((st = pop_from_result())) {
total++;
if (st->discard) {
bad++;
continue;
}
bzero(cut_name, 20);
if (strlen(st->name) < 16) {
/* output raw name */
pr_info("%20s ", st->name);
} else {
strncpy(cut_name, st->name, 16);
cut_name[16] = '.';
cut_name[17] = '.';
cut_name[18] = '.';
cut_name[19] = '\0';
/* cut off name for saving output style */
pr_info("%20s ", cut_name);
}
pr_info("%10u ", st->nr_acquired);
pr_info("%10u ", st->nr_contended);
pr_info("%15" PRIu64 " ", st->avg_wait_time);
pr_info("%15" PRIu64 " ", st->wait_time_total);
pr_info("%15" PRIu64 " ", st->wait_time_max);
pr_info("%15" PRIu64 " ", st->wait_time_min == ULLONG_MAX ?
0 : st->wait_time_min);
pr_info("\n");
}
print_bad_events(bad, total);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Frédéric Weisbecker | 135 | 49.63% | 3 | 37.50% |
| Hitoshi Mitake | 110 | 40.44% | 3 | 37.50% |
| Davidlohr Bueso A | 18 | 6.62% | 1 | 12.50% |
| Arnaldo Carvalho de Melo | 9 | 3.31% | 1 | 12.50% |
| Total | 272 | 100.00% | 8 | 100.00% |
static bool info_threads, info_map;
static void dump_threads(void)
{
struct thread_stat *st;
struct rb_node *node;
struct thread *t;
pr_info("%10s: comm\n", "Thread ID");
node = rb_first(&thread_stats);
while (node) {
st = container_of(node, struct thread_stat, rb);
t = perf_session__findnew(session, st->tid);
pr_info("%10d: %s\n", st->tid, thread__comm_str(t));
node = rb_next(node);
thread__put(t);
};
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 86 | 91.49% | 1 | 33.33% |
| Arnaldo Carvalho de Melo | 5 | 5.32% | 1 | 33.33% |
| Frédéric Weisbecker | 3 | 3.19% | 1 | 33.33% |
| Total | 94 | 100.00% | 3 | 100.00% |
static void dump_map(void)
{
unsigned int i;
struct lock_stat *st;
pr_info("Address of instance: name of class\n");
for (i = 0; i < LOCKHASH_SIZE; i++) {
list_for_each_entry(st, &lockhash_table[i], hash_entry) {
pr_info(" %p: %s\n", st->addr, st->name);
}
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 60 | 100.00% | 2 | 100.00% |
| Total | 60 | 100.00% | 2 | 100.00% |
static int dump_info(void)
{
int rc = 0;
if (info_threads)
dump_threads();
else if (info_map)
dump_map();
else {
rc = -1;
pr_err("Unknown type of information\n");
}
return rc;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 27 | 61.36% | 1 | 50.00% |
| David Ahern | 17 | 38.64% | 1 | 50.00% |
| Total | 44 | 100.00% | 2 | 100.00% |
typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
struct perf_sample *sample);
static int process_sample_event(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample,
struct perf_evsel *evsel,
struct machine *machine)
{
int err = 0;
struct thread *thread = machine__findnew_thread(machine, sample->pid,
sample->tid);
if (thread == NULL) {
pr_debug("problem processing %d event, skipping it.\n",
event->header.type);
return -1;
}
if (evsel->handler != NULL) {
tracepoint_handler f = evsel->handler;
err = f(evsel, sample);
}
thread__put(thread);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnaldo Carvalho de Melo | 64 | 57.14% | 10 | 76.92% |
| Frédéric Weisbecker | 43 | 38.39% | 1 | 7.69% |
| Adrian Hunter | 4 | 3.57% | 1 | 7.69% |
| Irina Tirdea | 1 | 0.89% | 1 | 7.69% |
| Total | 112 | 100.00% | 13 | 100.00% |
static void sort_result(void)
{
unsigned int i;
struct lock_stat *st;
for (i = 0; i < LOCKHASH_SIZE; i++) {
list_for_each_entry(st, &lockhash_table[i], hash_entry) {
insert_to_result(st, compare);
}
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Davidlohr Bueso A | 49 | 100.00% | 1 | 100.00% |
| Total | 49 | 100.00% | 1 | 100.00% |
static const struct perf_evsel_str_handler lock_tracepoints[] = {
{ "lock:lock_acquire", perf_evsel__process_lock_acquire, }, /* CONFIG_LOCKDEP */
{ "lock:lock_acquired", perf_evsel__process_lock_acquired, }, /* CONFIG_LOCKDEP, CONFIG_LOCK_STAT */
{ "lock:lock_contended", perf_evsel__process_lock_contended, }, /* CONFIG_LOCKDEP, CONFIG_LOCK_STAT */
{ "lock:lock_release", perf_evsel__process_lock_release, }, /* CONFIG_LOCKDEP */
};
static bool force;
static int __cmd_report(bool display_info)
{
int err = -EINVAL;
struct perf_tool eops = {
.sample = process_sample_event,
.comm = perf_event__process_comm,
.namespaces = perf_event__process_namespaces,
.ordered_events = true,
};
struct perf_data data = {
.file = {
.path = input_name,
},
.mode = PERF_DATA_MODE_READ,
.force = force,
};
session = perf_session__new(&data, false, &eops);
if (!session) {
pr_err("Initializing perf session failed\n");
return -1;
}
symbol__init(&session->header.env);
if (!perf_session__has_traces(session, "lock record"))
goto out_delete;
if (perf_session__set_tracepoints_handlers(session, lock_tracepoints)) {
pr_err("Initializing perf session tracepoint handlers failed\n");
goto out_delete;
}
if (select_key())
goto out_delete;
err = perf_session__process_events(session);
if (err)
goto out_delete;
setup_pager();
if (display_info) /* used for info subcommand */
err = dump_info();
else {
sort_result();
print_result();
}
out_delete:
perf_session__delete(session);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Davidlohr Bueso A | 60 | 31.25% | 1 | 6.25% |
| Hitoshi Mitake | 36 | 18.75% | 1 | 6.25% |
| Arnaldo Carvalho de Melo | 36 | 18.75% | 2 | 12.50% |
| Jiri Olsa | 24 | 12.50% | 4 | 25.00% |
| David Ahern | 10 | 5.21% | 1 | 6.25% |
| Namhyung Kim | 10 | 5.21% | 2 | 12.50% |
| Yunlong Song | 5 | 2.60% | 1 | 6.25% |
| Hari Bathini | 5 | 2.60% | 1 | 6.25% |
| Ian Munsie | 3 | 1.56% | 1 | 6.25% |
| Tom Zanussi | 2 | 1.04% | 1 | 6.25% |
| Taeung Song | 1 | 0.52% | 1 | 6.25% |
| Total | 192 | 100.00% | 16 | 100.00% |
static int __cmd_record(int argc, const char **argv)
{
const char *record_args[] = {
"record", "-R", "-m", "1024", "-c", "1",
};
unsigned int rec_argc, i, j, ret;
const char **rec_argv;
for (i = 0; i < ARRAY_SIZE(lock_tracepoints); i++) {
if (!is_valid_tracepoint(lock_tracepoints[i].name)) {
pr_err("tracepoint %s is not enabled. "
"Are CONFIG_LOCKDEP and CONFIG_LOCK_STAT enabled?\n",
lock_tracepoints[i].name);
return 1;
}
}
rec_argc = ARRAY_SIZE(record_args) + argc - 1;
/* factor of 2 is for -e in front of each tracepoint */
rec_argc += 2 * ARRAY_SIZE(lock_tracepoints);
rec_argv = calloc(rec_argc + 1, sizeof(char *));
if (!rec_argv)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(record_args); i++)
rec_argv[i] = strdup(record_args[i]);
for (j = 0; j < ARRAY_SIZE(lock_tracepoints); j++) {
rec_argv[i++] = "-e";
rec_argv[i++] = strdup(lock_tracepoints[j].name);
}
for (j = 1; j < (unsigned int)argc; j++, i++)
rec_argv[i] = argv[j];
BUG_ON(i != rec_argc);
ret = cmd_record(i, rec_argv);
free(rec_argv);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 139 | 51.48% | 2 | 28.57% |
| David Ahern | 95 | 35.19% | 1 | 14.29% |
| Arnaldo Carvalho de Melo | 15 | 5.56% | 2 | 28.57% |
| Davidlohr Bueso A | 13 | 4.81% | 1 | 14.29% |
| Chris Samuel | 8 | 2.96% | 1 | 14.29% |
| Total | 270 | 100.00% | 7 | 100.00% |
int cmd_lock(int argc, const char **argv)
{
const struct option lock_options[] = {
OPT_STRING('i', "input", &input_name, "file", "input file name"),
OPT_INCR('v', "verbose", &verbose, "be more verbose (show symbol address, etc)"),
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, "dump raw trace in ASCII"),
OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
OPT_END()
};
const struct option info_options[] = {
OPT_BOOLEAN('t', "threads", &info_threads,
"dump thread list in perf.data"),
OPT_BOOLEAN('m', "map", &info_map,
"map of lock instances (address:name table)"),
OPT_PARENT(lock_options)
};
const struct option report_options[] = {
OPT_STRING('k', "key", &sort_key, "acquired",
"key for sorting (acquired / contended / avg_wait / wait_total / wait_max / wait_min)"),
/* TODO: type */
OPT_PARENT(lock_options)
};
const char * const info_usage[] = {
"perf lock info [<options>]",
NULL
};
const char *const lock_subcommands[] = { "record", "report", "script",
"info", NULL };
const char *lock_usage[] = {
NULL,
NULL
};
const char * const report_usage[] = {
"perf lock report [<options>]",
NULL
};
unsigned int i;
int rc = 0;
for (i = 0; i < LOCKHASH_SIZE; i++)
INIT_LIST_HEAD(lockhash_table + i);
argc = parse_options_subcommand(argc, argv, lock_options, lock_subcommands,
lock_usage, PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc)
usage_with_options(lock_usage, lock_options);
if (!strncmp(argv[0], "rec", 3)) {
return __cmd_record(argc, argv);
} else if (!strncmp(argv[0], "report", 6)) {
trace_handler = &report_lock_ops;
if (argc) {
argc = parse_options(argc, argv,
report_options, report_usage, 0);
if (argc)
usage_with_options(report_usage, report_options);
}
rc = __cmd_report(false);
} else if (!strcmp(argv[0], "script")) {
/* Aliased to 'perf script' */
return cmd_script(argc, argv);
} else if (!strcmp(argv[0], "info")) {
if (argc) {
argc = parse_options(argc, argv,
info_options, info_usage, 0);
if (argc)
usage_with_options(info_usage, info_options);
}
/* recycling report_lock_ops */
trace_handler = &report_lock_ops;
rc = __cmd_report(true);
} else {
usage_with_options(lock_usage, lock_options);
}
return rc;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 225 | 51.02% | 2 | 16.67% |
| Arnaldo Carvalho de Melo | 119 | 26.98% | 2 | 16.67% |
| Changbin Du | 36 | 8.16% | 1 | 8.33% |
| Ramkumar Ramachandra | 22 | 4.99% | 1 | 8.33% |
| Ingo Molnar | 13 | 2.95% | 2 | 16.67% |
| Davidlohr Bueso A | 10 | 2.27% | 2 | 16.67% |
| David Ahern | 8 | 1.81% | 1 | 8.33% |
| Yunlong Song | 8 | 1.81% | 1 | 8.33% |
| Total | 441 | 100.00% | 12 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hitoshi Mitake | 2754 | 61.80% | 3 | 5.45% |
| Arnaldo Carvalho de Melo | 647 | 14.52% | 18 | 32.73% |
| Frédéric Weisbecker | 313 | 7.02% | 6 | 10.91% |
| David Ahern | 307 | 6.89% | 2 | 3.64% |
| Davidlohr Bueso A | 214 | 4.80% | 5 | 9.09% |
| Marcin Ślusarz | 55 | 1.23% | 1 | 1.82% |
| Changbin Du | 36 | 0.81% | 1 | 1.82% |
| Ingo Molnar | 28 | 0.63% | 2 | 3.64% |
| Jiri Olsa | 27 | 0.61% | 4 | 7.27% |
| Ramkumar Ramachandra | 22 | 0.49% | 1 | 1.82% |
| Yunlong Song | 17 | 0.38% | 1 | 1.82% |
| Namhyung Kim | 10 | 0.22% | 2 | 3.64% |
| Chris Samuel | 8 | 0.18% | 1 | 1.82% |
| Hari Bathini | 5 | 0.11% | 1 | 1.82% |
| Adrian Hunter | 4 | 0.09% | 1 | 1.82% |
| Ian Munsie | 3 | 0.07% | 1 | 1.82% |
| Tom Zanussi | 2 | 0.04% | 1 | 1.82% |
| Josh Poimboeuf | 1 | 0.02% | 1 | 1.82% |
| Taeung Song | 1 | 0.02% | 1 | 1.82% |
| Irina Tirdea | 1 | 0.02% | 1 | 1.82% |
| Greg Kroah-Hartman | 1 | 0.02% | 1 | 1.82% |
| Total | 4456 | 100.00% | 55 | 100.00% |
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