perf: Add 'perf kmem' tool

This tool is mostly a perf version of kmemtrace-user.

The following information is provided by this tool:

 - the total amount of memory allocated and fragmentation per
   call-site

 - the total amount of memory allocated and fragmentation per
   allocation

 - total memory allocated and fragmentation in the collected
   dataset - ...

Sample output:

 # ./perf kmem record
 ^C
 # ./perf kmem --stat caller --stat alloc -l 10

 ------------------------------------------------------------------------------
 Callsite          | Total_alloc/Per |  Total_req/Per  |  Hit   | Fragmentation
 ------------------------------------------------------------------------------
 0xc052f37a        |   790528/4096   |   790528/4096   |    193 |    0.000%
 0xc0541d70        |   524288/4096   |   524288/4096   |    128 |    0.000%
 0xc051cc68        |   481600/200    |   481600/200    |   2408 |    0.000%
 0xc0572623        |   297444/676    |   297440/676    |    440 |    0.001%
 0xc05399f1        |    73476/164    |    73472/164    |    448 |    0.005%
 0xc05243bf        |    51456/256    |    51456/256    |    201 |    0.000%
 0xc0730d0e        |    31844/497    |    31808/497    |     64 |    0.113%
 0xc0734c4e        |    17152/256    |    17152/256    |     67 |    0.000%
 0xc0541a6d        |    16384/128    |    16384/128    |    128 |    0.000%
 0xc059c217        |    13120/40     |    13120/40     |    328 |    0.000%
 0xc0501ee6        |    11264/88     |    11264/88     |    128 |    0.000%
 0xc04daef0        |     7504/682    |     7128/648    |     11 |    5.011%
 0xc04e14a3        |     4216/191    |     4216/191    |     22 |    0.000%
 0xc05041ca        |     3524/44     |     3520/44     |     80 |    0.114%
 0xc0734fa3        |     2104/701    |     1620/540    |      3 |   23.004%
 0xc05ec9f1        |     2024/289    |     2016/288    |      7 |    0.395%
 0xc06a1999        |     1792/256    |     1792/256    |      7 |    0.000%
 0xc0463b9a        |     1584/144    |     1584/144    |     11 |    0.000%
 0xc0541eb0        |     1024/16     |     1024/16     |     64 |    0.000%
 0xc06a19ac        |      896/128    |      896/128    |      7 |    0.000%
 0xc05721c0        |      772/12     |      768/12     |     64 |    0.518%
 0xc054d1e6        |      288/57     |      280/56     |      5 |    2.778%
 0xc04b562e        |      157/31     |      154/30     |      5 |    1.911%
 0xc04b536f        |       80/16     |       80/16     |      5 |    0.000%
 0xc05855a0        |       64/64     |       36/36     |      1 |   43.750%
 ------------------------------------------------------------------------------

 ------------------------------------------------------------------------------
 Alloc Ptr         | Total_alloc/Per |  Total_req/Per  |  Hit   | Fragmentation
 ------------------------------------------------------------------------------
 0xda884000        |  1052672/4096   |  1052672/4096   |    257 |    0.000%
 0xda886000        |   262144/4096   |   262144/4096   |     64 |    0.000%
 0xf60c7c00        |    16512/128    |    16512/128    |    129 |    0.000%
 0xf59a4118        |    13120/40     |    13120/40     |    328 |    0.000%
 0xdfd4b2c0        |    11264/88     |    11264/88     |    128 |    0.000%
 0xf5274600        |     7680/256    |     7680/256    |     30 |    0.000%
 0xe8395000        |     5948/594    |     5464/546    |     10 |    8.137%
 0xe59c3c00        |     5748/479    |     5712/476    |     12 |    0.626%
 0xf4cd1a80        |     3524/44     |     3520/44     |     80 |    0.114%
 0xe5bd1600        |     2892/482    |     2856/476    |      6 |    1.245%
 ...               | ...             | ...             | ...    | ...
 ------------------------------------------------------------------------------

SUMMARY
=======
Total bytes requested: 2333626
Total bytes allocated: 2353712
Total bytes wasted on internal fragmentation: 20086
Internal fragmentation: 0.853375%

TODO:
- show sym+offset in 'callsite' column
- show cross node allocation stats
- collect more useful stats?
- ...

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
Cc: linux-mm@kvack.org <linux-mm@kvack.org>
LKML-Reference: <4B064AF5.9060208@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Li Zefan 2009-11-20 15:53:25 +08:00 committed by Ingo Molnar
parent ce64c62074
commit ba77c9e111
4 changed files with 594 additions and 13 deletions

View File

@ -444,6 +444,7 @@ BUILTIN_OBJS += builtin-timechart.o
BUILTIN_OBJS += builtin-top.o
BUILTIN_OBJS += builtin-trace.o
BUILTIN_OBJS += builtin-probe.o
BUILTIN_OBJS += builtin-kmem.o
PERFLIBS = $(LIB_FILE)

578
tools/perf/builtin-kmem.c Normal file
View File

@ -0,0 +1,578 @@
#include "builtin.h"
#include "perf.h"
#include "util/util.h"
#include "util/cache.h"
#include "util/symbol.h"
#include "util/thread.h"
#include "util/header.h"
#include "util/parse-options.h"
#include "util/trace-event.h"
#include "util/debug.h"
#include "util/data_map.h"
#include <linux/rbtree.h>
struct alloc_stat;
typedef int (*sort_fn_t)(struct alloc_stat *, struct alloc_stat *);
static char const *input_name = "perf.data";
static struct perf_header *header;
static u64 sample_type;
static int alloc_flag;
static int caller_flag;
sort_fn_t alloc_sort_fn;
sort_fn_t caller_sort_fn;
static int alloc_lines = -1;
static int caller_lines = -1;
static char *cwd;
static int cwdlen;
struct alloc_stat {
union {
struct {
char *name;
u64 call_site;
};
u64 ptr;
};
u64 bytes_req;
u64 bytes_alloc;
u32 hit;
struct rb_node node;
};
static struct rb_root root_alloc_stat;
static struct rb_root root_alloc_sorted;
static struct rb_root root_caller_stat;
static struct rb_root root_caller_sorted;
static unsigned long total_requested, total_allocated;
struct raw_event_sample {
u32 size;
char data[0];
};
static int
process_comm_event(event_t *event, unsigned long offset, unsigned long head)
{
struct thread *thread = threads__findnew(event->comm.pid);
dump_printf("%p [%p]: PERF_RECORD_COMM: %s:%d\n",
(void *)(offset + head),
(void *)(long)(event->header.size),
event->comm.comm, event->comm.pid);
if (thread == NULL ||
thread__set_comm(thread, event->comm.comm)) {
dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
return -1;
}
return 0;
}
static void insert_alloc_stat(unsigned long ptr,
int bytes_req, int bytes_alloc)
{
struct rb_node **node = &root_alloc_stat.rb_node;
struct rb_node *parent = NULL;
struct alloc_stat *data = NULL;
if (!alloc_flag)
return;
while (*node) {
parent = *node;
data = rb_entry(*node, struct alloc_stat, node);
if (ptr > data->ptr)
node = &(*node)->rb_right;
else if (ptr < data->ptr)
node = &(*node)->rb_left;
else
break;
}
if (data && data->ptr == ptr) {
data->hit++;
data->bytes_req += bytes_req;
data->bytes_alloc += bytes_req;
} else {
data = malloc(sizeof(*data));
data->ptr = ptr;
data->hit = 1;
data->bytes_req = bytes_req;
data->bytes_alloc = bytes_alloc;
rb_link_node(&data->node, parent, node);
rb_insert_color(&data->node, &root_alloc_stat);
}
}
static void insert_caller_stat(unsigned long call_site,
int bytes_req, int bytes_alloc)
{
struct rb_node **node = &root_caller_stat.rb_node;
struct rb_node *parent = NULL;
struct alloc_stat *data = NULL;
if (!caller_flag)
return;
while (*node) {
parent = *node;
data = rb_entry(*node, struct alloc_stat, node);
if (call_site > data->call_site)
node = &(*node)->rb_right;
else if (call_site < data->call_site)
node = &(*node)->rb_left;
else
break;
}
if (data && data->call_site == call_site) {
data->hit++;
data->bytes_req += bytes_req;
data->bytes_alloc += bytes_req;
} else {
data = malloc(sizeof(*data));
data->call_site = call_site;
data->hit = 1;
data->bytes_req = bytes_req;
data->bytes_alloc = bytes_alloc;
rb_link_node(&data->node, parent, node);
rb_insert_color(&data->node, &root_caller_stat);
}
}
static void process_alloc_event(struct raw_event_sample *raw,
struct event *event,
int cpu __used,
u64 timestamp __used,
struct thread *thread __used,
int node __used)
{
unsigned long call_site;
unsigned long ptr;
int bytes_req;
int bytes_alloc;
ptr = raw_field_value(event, "ptr", raw->data);
call_site = raw_field_value(event, "call_site", raw->data);
bytes_req = raw_field_value(event, "bytes_req", raw->data);
bytes_alloc = raw_field_value(event, "bytes_alloc", raw->data);
insert_alloc_stat(ptr, bytes_req, bytes_alloc);
insert_caller_stat(call_site, bytes_req, bytes_alloc);
total_requested += bytes_req;
total_allocated += bytes_alloc;
}
static void process_free_event(struct raw_event_sample *raw __used,
struct event *event __used,
int cpu __used,
u64 timestamp __used,
struct thread *thread __used)
{
}
static void
process_raw_event(event_t *raw_event __used, void *more_data,
int cpu, u64 timestamp, struct thread *thread)
{
struct raw_event_sample *raw = more_data;
struct event *event;
int type;
type = trace_parse_common_type(raw->data);
event = trace_find_event(type);
if (!strcmp(event->name, "kmalloc") ||
!strcmp(event->name, "kmem_cache_alloc")) {
process_alloc_event(raw, event, cpu, timestamp, thread, 0);
return;
}
if (!strcmp(event->name, "kmalloc_node") ||
!strcmp(event->name, "kmem_cache_alloc_node")) {
process_alloc_event(raw, event, cpu, timestamp, thread, 1);
return;
}
if (!strcmp(event->name, "kfree") ||
!strcmp(event->name, "kmem_cache_free")) {
process_free_event(raw, event, cpu, timestamp, thread);
return;
}
}
static int
process_sample_event(event_t *event, unsigned long offset, unsigned long head)
{
u64 ip = event->ip.ip;
u64 timestamp = -1;
u32 cpu = -1;
u64 period = 1;
void *more_data = event->ip.__more_data;
struct thread *thread = threads__findnew(event->ip.pid);
if (sample_type & PERF_SAMPLE_TIME) {
timestamp = *(u64 *)more_data;
more_data += sizeof(u64);
}
if (sample_type & PERF_SAMPLE_CPU) {
cpu = *(u32 *)more_data;
more_data += sizeof(u32);
more_data += sizeof(u32); /* reserved */
}
if (sample_type & PERF_SAMPLE_PERIOD) {
period = *(u64 *)more_data;
more_data += sizeof(u64);
}
dump_printf("%p [%p]: PERF_RECORD_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
(void *)(offset + head),
(void *)(long)(event->header.size),
event->header.misc,
event->ip.pid, event->ip.tid,
(void *)(long)ip,
(long long)period);
if (thread == NULL) {
pr_debug("problem processing %d event, skipping it.\n",
event->header.type);
return -1;
}
dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
process_raw_event(event, more_data, cpu, timestamp, thread);
return 0;
}
static int sample_type_check(u64 type)
{
sample_type = type;
if (!(sample_type & PERF_SAMPLE_RAW)) {
fprintf(stderr,
"No trace sample to read. Did you call perf record "
"without -R?");
return -1;
}
return 0;
}
static struct perf_file_handler file_handler = {
.process_sample_event = process_sample_event,
.process_comm_event = process_comm_event,
.sample_type_check = sample_type_check,
};
static int read_events(void)
{
register_idle_thread();
register_perf_file_handler(&file_handler);
return mmap_dispatch_perf_file(&header, input_name, 0, 0,
&cwdlen, &cwd);
}
static double fragmentation(unsigned long n_req, unsigned long n_alloc)
{
if (n_alloc == 0)
return 0.0;
else
return 100.0 - (100.0 * n_req / n_alloc);
}
static void __print_result(struct rb_root *root, int n_lines, int is_caller)
{
struct rb_node *next;
printf("\n ------------------------------------------------------------------------------\n");
if (is_caller)
printf(" Callsite |");
else
printf(" Alloc Ptr |");
printf(" Total_alloc/Per | Total_req/Per | Hit | Fragmentation\n");
printf(" ------------------------------------------------------------------------------\n");
next = rb_first(root);
while (next && n_lines--) {
struct alloc_stat *data;
data = rb_entry(next, struct alloc_stat, node);
printf(" %-16p | %8llu/%-6lu | %8llu/%-6lu | %6lu | %8.3f%%\n",
is_caller ? (void *)(unsigned long)data->call_site :
(void *)(unsigned long)data->ptr,
(unsigned long long)data->bytes_alloc,
(unsigned long)data->bytes_alloc / data->hit,
(unsigned long long)data->bytes_req,
(unsigned long)data->bytes_req / data->hit,
(unsigned long)data->hit,
fragmentation(data->bytes_req, data->bytes_alloc));
next = rb_next(next);
}
if (n_lines == -1)
printf(" ... | ... | ... | ... | ... \n");
printf(" ------------------------------------------------------------------------------\n");
}
static void print_summary(void)
{
printf("\nSUMMARY\n=======\n");
printf("Total bytes requested: %lu\n", total_requested);
printf("Total bytes allocated: %lu\n", total_allocated);
printf("Total bytes wasted on internal fragmentation: %lu\n",
total_allocated - total_requested);
printf("Internal fragmentation: %f%%\n",
fragmentation(total_requested, total_allocated));
}
static void print_result(void)
{
if (caller_flag)
__print_result(&root_caller_sorted, caller_lines, 1);
if (alloc_flag)
__print_result(&root_alloc_sorted, alloc_lines, 0);
print_summary();
}
static void sort_insert(struct rb_root *root, struct alloc_stat *data,
sort_fn_t sort_fn)
{
struct rb_node **new = &(root->rb_node);
struct rb_node *parent = NULL;
while (*new) {
struct alloc_stat *this;
int cmp;
this = rb_entry(*new, struct alloc_stat, node);
parent = *new;
cmp = sort_fn(data, this);
if (cmp > 0)
new = &((*new)->rb_left);
else
new = &((*new)->rb_right);
}
rb_link_node(&data->node, parent, new);
rb_insert_color(&data->node, root);
}
static void __sort_result(struct rb_root *root, struct rb_root *root_sorted,
sort_fn_t sort_fn)
{
struct rb_node *node;
struct alloc_stat *data;
for (;;) {
node = rb_first(root);
if (!node)
break;
rb_erase(node, root);
data = rb_entry(node, struct alloc_stat, node);
sort_insert(root_sorted, data, sort_fn);
}
}
static void sort_result(void)
{
__sort_result(&root_alloc_stat, &root_alloc_sorted, alloc_sort_fn);
__sort_result(&root_caller_stat, &root_caller_sorted, caller_sort_fn);
}
static int __cmd_kmem(void)
{
setup_pager();
read_events();
sort_result();
print_result();
return 0;
}
static const char * const kmem_usage[] = {
"perf kmem [<options>] {record}",
NULL
};
static int ptr_cmp(struct alloc_stat *l, struct alloc_stat *r)
{
if (l->ptr < r->ptr)
return -1;
else if (l->ptr > r->ptr)
return 1;
return 0;
}
static int callsite_cmp(struct alloc_stat *l, struct alloc_stat *r)
{
if (l->call_site < r->call_site)
return -1;
else if (l->call_site > r->call_site)
return 1;
return 0;
}
static int bytes_cmp(struct alloc_stat *l, struct alloc_stat *r)
{
if (l->bytes_alloc < r->bytes_alloc)
return -1;
else if (l->bytes_alloc > r->bytes_alloc)
return 1;
return 0;
}
static int parse_sort_opt(const struct option *opt __used,
const char *arg, int unset __used)
{
sort_fn_t sort_fn;
if (!arg)
return -1;
if (strcmp(arg, "ptr") == 0)
sort_fn = ptr_cmp;
else if (strcmp(arg, "call_site") == 0)
sort_fn = callsite_cmp;
else if (strcmp(arg, "bytes") == 0)
sort_fn = bytes_cmp;
else
return -1;
if (caller_flag > alloc_flag)
caller_sort_fn = sort_fn;
else
alloc_sort_fn = sort_fn;
return 0;
}
static int parse_stat_opt(const struct option *opt __used,
const char *arg, int unset __used)
{
if (!arg)
return -1;
if (strcmp(arg, "alloc") == 0)
alloc_flag = (caller_flag + 1);
else if (strcmp(arg, "caller") == 0)
caller_flag = (alloc_flag + 1);
else
return -1;
return 0;
}
static int parse_line_opt(const struct option *opt __used,
const char *arg, int unset __used)
{
int lines;
if (!arg)
return -1;
lines = strtoul(arg, NULL, 10);
if (caller_flag > alloc_flag)
caller_lines = lines;
else
alloc_lines = lines;
return 0;
}
static const struct option kmem_options[] = {
OPT_STRING('i', "input", &input_name, "file",
"input file name"),
OPT_CALLBACK(0, "stat", NULL, "<alloc>|<caller>",
"stat selector, Pass 'alloc' or 'caller'.",
parse_stat_opt),
OPT_CALLBACK('s', "sort", NULL, "key",
"sort by key: ptr, call_site, hit, bytes",
parse_sort_opt),
OPT_CALLBACK('l', "line", NULL, "num",
"show n lins",
parse_line_opt),
OPT_END()
};
static const char *record_args[] = {
"record",
"-a",
"-R",
"-M",
"-f",
"-c", "1",
"-e", "kmem:kmalloc",
"-e", "kmem:kmalloc_node",
"-e", "kmem:kfree",
"-e", "kmem:kmem_cache_alloc",
"-e", "kmem:kmem_cache_alloc_node",
"-e", "kmem:kmem_cache_free",
};
static int __cmd_record(int argc, const char **argv)
{
unsigned int rec_argc, i, j;
const char **rec_argv;
rec_argc = ARRAY_SIZE(record_args) + argc - 1;
rec_argv = calloc(rec_argc + 1, sizeof(char *));
for (i = 0; i < ARRAY_SIZE(record_args); i++)
rec_argv[i] = strdup(record_args[i]);
for (j = 1; j < (unsigned int)argc; j++, i++)
rec_argv[i] = argv[j];
return cmd_record(i, rec_argv, NULL);
}
int cmd_kmem(int argc, const char **argv, const char *prefix __used)
{
symbol__init(0);
argc = parse_options(argc, argv, kmem_options, kmem_usage, 0);
if (argc && !strncmp(argv[0], "rec", 3))
return __cmd_record(argc, argv);
else if (argc)
usage_with_options(kmem_usage, kmem_options);
if (!alloc_sort_fn)
alloc_sort_fn = bytes_cmp;
if (!caller_sort_fn)
caller_sort_fn = bytes_cmp;
return __cmd_kmem();
}

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@ -28,5 +28,6 @@ extern int cmd_top(int argc, const char **argv, const char *prefix);
extern int cmd_trace(int argc, const char **argv, const char *prefix);
extern int cmd_version(int argc, const char **argv, const char *prefix);
extern int cmd_probe(int argc, const char **argv, const char *prefix);
extern int cmd_kmem(int argc, const char **argv, const char *prefix);
#endif

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@ -285,9 +285,9 @@ static void handle_internal_command(int argc, const char **argv)
{
const char *cmd = argv[0];
static struct cmd_struct commands[] = {
{ "buildid-list", cmd_buildid_list, 0 },
{ "help", cmd_help, 0 },
{ "list", cmd_list, 0 },
{ "buildid-list", cmd_buildid_list, 0 },
{ "record", cmd_record, 0 },
{ "report", cmd_report, 0 },
{ "bench", cmd_bench, 0 },
@ -299,6 +299,7 @@ static void handle_internal_command(int argc, const char **argv)
{ "trace", cmd_trace, 0 },
{ "sched", cmd_sched, 0 },
{ "probe", cmd_probe, 0 },
{ "kmem", cmd_kmem, 0 },
};
unsigned int i;
static const char ext[] = STRIP_EXTENSION;