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raspberrypi-kernel
提交 de04687f 编写于 作者: A Arnaldo Carvalho de Melo 提交者： Ingo Molnar
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perf_counter tools: Convert builtin-top to use libperf symbol routines 

Now both perf top and report use the same routines.
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20090528175541.GG4747@ghostprotocols.net>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
上级 69ee69f6
隐藏空白更改
内联 并排
Showing with 117 addition and 186 deletion
Documentation/perf_counter/builtin-top.c
浏览文件 @ de04687f
......@@ -44,8 +44,9 @@
#include "perf.h"
#include "builtin.h"
#include "util/symbol.h"
#include "util/util.h"
#include "util/util.h"
#include "util/rbtree.h"
#include "util/parse-options.h"
#include "util/parse-events.h"
......@@ -125,19 +126,21 @@ static uint64_t min_ip;
static uint64_t max_ip = -1ll;
struct sym_entry {
unsigned long long addr;
char *sym;
struct rb_node rb_node;
struct list_head node;
unsigned long count[MAX_COUNTERS];
int skip;
};
#define MAX_SYMS 100000
static int sym_table_count;
struct sym_entry *sym_filter_entry;
static struct sym_entry sym_table[MAX_SYMS];
struct dso *kernel_dso;
/*
* Symbols will be added here in record_ip and will get out
* after decayed.
*/
static LIST_HEAD(active_symbols);
/*
* Ordering weight: count-1 * count-2 * ... / count-n
......@@ -157,42 +160,60 @@ static double sym_weight(const struct sym_entry *sym)
return weight;
}
static int compare(const void *__sym1, const void *__sym2)
{
const struct sym_entry *sym1 = __sym1, *sym2 = __sym2;
return sym_weight(sym1) < sym_weight(sym2);
}
static long events;
static long userspace_events;
static const char CONSOLE_CLEAR[] = "";
static struct sym_entry tmp[MAX_SYMS];
static void list_insert_active_sym(struct sym_entry *syme)
{
list_add(&syme->node, &active_symbols);
}
static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se)
{
struct rb_node **p = &tree->rb_node;
struct rb_node *parent = NULL;
struct sym_entry *iter;
while (*p != NULL) {
parent = *p;
iter = rb_entry(parent, struct sym_entry, rb_node);
if (sym_weight(se) > sym_weight(iter))
p = &(*p)->rb_left;
else
p = &(*p)->rb_right;
}
rb_link_node(&se->rb_node, parent, p);
rb_insert_color(&se->rb_node, tree);
}
static void print_sym_table(void)
{
int i, j, active_count, printed;
int printed, j;
int counter;
float events_per_sec = events/delay_secs;
float kevents_per_sec = (events-userspace_events)/delay_secs;
float sum_kevents = 0.0;
struct sym_entry *syme, *n;
struct rb_root tmp = RB_ROOT;
struct rb_node *nd;
events = userspace_events = 0;
/* Iterate over symbol table and copy/tally/decay active symbols. */
for (i = 0, active_count = 0; i < sym_table_count; i++) {
if (sym_table[i].count[0]) {
tmp[active_count++] = sym_table[i];
sum_kevents += sym_table[i].count[0];
/* Sort the active symbols */
list_for_each_entry_safe(syme, n, &active_symbols, node) {
if (syme->count[0] != 0) {
rb_insert_active_sym(&tmp, syme);
sum_kevents += syme->count[0];
for (j = 0; j < nr_counters; j++)
sym_table[i].count[j] = zero ? 0 : sym_table[i].count[j] * 7 / 8;
}
syme->count[j] = zero ? 0 : syme->count[j] * 7 / 8;
} else
list_del_init(&syme->node);
}
qsort(tmp, active_count + 1, sizeof(tmp[0]), compare);
write(1, CONSOLE_CLEAR, strlen(CONSOLE_CLEAR));
printf(
......@@ -238,23 +259,25 @@ static void print_sym_table(void)
" ______ ______ _____ ________________ _______________\n\n"
);
for (i = 0, printed = 0; i < active_count; i++) {
for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
struct sym_entry *syme = rb_entry(nd, struct sym_entry, rb_node);
struct symbol *sym = (struct symbol *)(syme + 1);
float pcnt;
if (++printed > 18 || tmp[i].count[0] < count_filter)
if (++printed > 18 || syme->count[0] < count_filter)
break;
pcnt = 100.0 - (100.0*((sum_kevents-tmp[i].count[0])/sum_kevents));
pcnt = 100.0 - (100.0 * ((sum_kevents - syme->count[0]) /
sum_kevents));
if (nr_counters == 1)
printf("%19.2f - %4.1f%% - %016llx : %s\n",
sym_weight(tmp + i),
pcnt, tmp[i].addr, tmp[i].sym);
sym_weight(syme),
pcnt, sym->start, sym->name);
else
printf("%8.1f %10ld - %4.1f%% - %016llx : %s\n",
sym_weight(tmp + i),
tmp[i].count[0],
pcnt, tmp[i].addr, tmp[i].sym);
sym_weight(syme), syme->count[0],
pcnt, sym->start, sym->name);
}
{
......@@ -277,146 +300,85 @@ static void *display_thread(void *arg)
return NULL;
}
static int read_symbol(FILE *in, struct sym_entry *s)
static int symbol_filter(struct dso *self, struct symbol *sym)
{
static int filter_match = 0;
char *sym, stype;
char str[500];
int rc, pos;
rc = fscanf(in, "%llx %c %499s", &s->addr, &stype, str);
if (rc == EOF)
return -1;
assert(rc == 3);
/* skip until end of line: */
pos = strlen(str);
do {
rc = fgetc(in);
if (rc == '\n' || rc == EOF || pos >= 499)
break;
str[pos] = rc;
pos++;
} while (1);
str[pos] = 0;
sym = str;
/* Filter out known duplicates and non-text symbols. */
if (!strcmp(sym, "_text"))
return 1;
if (!min_ip && !strcmp(sym, "_stext"))
return 1;
if (!strcmp(sym, "_etext") || !strcmp(sym, "_sinittext"))
return 1;
if (stype != 'T' && stype != 't')
return 1;
if (!strncmp("init_module", sym, 11) || !strncmp("cleanup_module", sym, 14))
return 1;
if (strstr(sym, "_text_start") || strstr(sym, "_text_end"))
static int filter_match;
struct sym_entry *syme;
const char *name = sym->name;
if (!strcmp(name, "_text") ||
!strcmp(name, "_etext") ||
!strcmp(name, "_sinittext") ||
!strncmp("init_module", name, 11) ||
!strncmp("cleanup_module", name, 14) ||
strstr(name, "_text_start") ||
strstr(name, "_text_end"))
return 1;
s->sym = malloc(strlen(str)+1);
assert(s->sym);
strcpy((char *)s->sym, str);
s->skip = 0;
syme = dso__sym_priv(self, sym);
/* Tag events to be skipped. */
if (!strcmp("default_idle", s->sym) || !strcmp("cpu_idle", s->sym))
s->skip = 1;
else if (!strcmp("enter_idle", s->sym) || !strcmp("exit_idle", s->sym))
s->skip = 1;
else if (!strcmp("mwait_idle", s->sym))
s->skip = 1;
if (!strcmp("default_idle", name) ||
!strcmp("cpu_idle", name) ||
!strcmp("enter_idle", name) ||
!strcmp("exit_idle", name) ||
!strcmp("mwait_idle", name))
syme->skip = 1;
if (filter_match == 1) {
filter_end = s->addr;
filter_end = sym->start;
filter_match = -1;
if (filter_end - filter_start > 10000) {
printf("hm, too large filter symbol <%s> - skipping.\n",
fprintf(stderr,
"hm, too large filter symbol <%s> - skipping.\n",
sym_filter);
printf("symbol filter start: %016lx\n", filter_start);
printf(" end: %016lx\n", filter_end);
fprintf(stderr, "symbol filter start: %016lx\n",
filter_start);
fprintf(stderr, " end: %016lx\n",
filter_end);
filter_end = filter_start = 0;
sym_filter = NULL;
sleep(1);
}
}
if (filter_match == 0 && sym_filter && !strcmp(s->sym, sym_filter)) {
if (filter_match == 0 && sym_filter && !strcmp(name, sym_filter)) {
filter_match = 1;
filter_start = s->addr;
filter_start = sym->start;
}
return 0;
}
static int compare_addr(const void *__sym1, const void *__sym2)
static int parse_symbols(void)
{
const struct sym_entry *sym1 = __sym1, *sym2 = __sym2;
struct rb_node *node;
struct symbol *sym;
return sym1->addr > sym2->addr;
}
static void sort_symbol_table(void)
{
int i, dups;
do {
qsort(sym_table, sym_table_count, sizeof(sym_table[0]), compare_addr);
for (i = 0, dups = 0; i < sym_table_count; i++) {
if (sym_table[i].addr == sym_table[i+1].addr) {
sym_table[i+1].addr = -1ll;
dups++;
}
}
sym_table_count -= dups;
} while(dups);
}
static void parse_symbols(void)
{
struct sym_entry *last;
kernel_dso = dso__new("[kernel]", sizeof(struct sym_entry));
if (kernel_dso == NULL)
return -1;
FILE *kallsyms = fopen("/proc/kallsyms", "r");
if (dso__load_kernel(kernel_dso, NULL, symbol_filter) != 0)
goto out_delete_dso;
if (!kallsyms) {
printf("Could not open /proc/kallsyms - no CONFIG_KALLSYMS_ALL=y?\n");
exit(-1);
}
node = rb_first(&kernel_dso->syms);
sym = rb_entry(node, struct symbol, rb_node);
min_ip = sym->start;
while (!feof(kallsyms)) {
if (read_symbol(kallsyms, &sym_table[sym_table_count]) == 0) {
sym_table_count++;
assert(sym_table_count <= MAX_SYMS);
}
}
node = rb_last(&kernel_dso->syms);
sym = rb_entry(node, struct symbol, rb_node);
max_ip = sym->start;
sort_symbol_table();
min_ip = sym_table[0].addr;
max_ip = sym_table[sym_table_count-1].addr;
last = sym_table + sym_table_count++;
if (dump_symtab)
dso__fprintf(kernel_dso, stdout);
last->addr = -1ll;
last->sym = "<end>";
if (filter_end) {
int count;
for (count=0; count < sym_table_count; count ++) {
if (!strcmp(sym_table[count].sym, sym_filter)) {
sym_filter_entry = &sym_table[count];
break;
}
}
}
if (dump_symtab) {
int i;
return 0;
for (i = 0; i < sym_table_count; i++)
fprintf(stderr, "%llx %s\n",
sym_table[i].addr, sym_table[i].sym);
}
out_delete_dso:
dso__delete(kernel_dso);
kernel_dso = NULL;
return -1;
}
#define TRACE_COUNT 3
......@@ -426,51 +388,20 @@ static void parse_symbols(void)
*/
static void record_ip(uint64_t ip, int counter)
{
int left_idx, middle_idx, right_idx, idx;
unsigned long left, middle, right;
left_idx = 0;
right_idx = sym_table_count-1;
assert(ip <= max_ip && ip >= min_ip);
while (left_idx + 1 < right_idx) {
middle_idx = (left_idx + right_idx) / 2;
struct symbol *sym = dso__find_symbol(kernel_dso, ip);
left = sym_table[ left_idx].addr;
middle = sym_table[middle_idx].addr;
right = sym_table[ right_idx].addr;
if (sym != NULL) {
struct sym_entry *syme = dso__sym_priv(kernel_dso, sym);
if (!(left <= middle && middle <= right)) {
printf("%016lx...\n%016lx...\n%016lx\n", left, middle, right);
printf("%d %d %d\n", left_idx, middle_idx, right_idx);
if (!syme->skip) {
syme->count[counter]++;
if (list_empty(&syme->node) || !syme->node.next)
list_insert_active_sym(syme);
return;
}
assert(left <= middle && middle <= right);
if (!(left <= ip && ip <= right)) {
printf(" left: %016lx\n", left);
printf(" ip: %016lx\n", (unsigned long)ip);
printf("right: %016lx\n", right);
}
assert(left <= ip && ip <= right);
/*
* [ left .... target .... middle .... right ]
* => right := middle
*/
if (ip < middle) {
right_idx = middle_idx;
continue;
}
/*
* [ left .... middle ... target ... right ]
* => left := middle
*/
left_idx = middle_idx;
}
idx = left_idx;
if (!sym_table[idx].skip)
sym_table[idx].count[counter]++;
else events--;
events--;
}
static void process_event(uint64_t ip, int counter)
......
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