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Diffstat (limited to 'tools/perf/builtin-top.c')
-rw-r--r--tools/perf/builtin-top.c230
1 files changed, 182 insertions, 48 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 4a9fe228be2a..89b7f68a1799 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -60,7 +60,7 @@ static int system_wide = 0;
static int default_interval = 0;
static int count_filter = 5;
-static int print_entries = 15;
+static int print_entries;
static int target_pid = -1;
static int inherit = 0;
@@ -76,6 +76,9 @@ static int delay_secs = 2;
static int zero = 0;
static int dump_symtab = 0;
+static bool hide_kernel_symbols = false;
+static bool hide_user_symbols = false;
+
/*
* Source
*/
@@ -104,6 +107,7 @@ struct sym_entry {
unsigned long snap_count;
double weight;
int skip;
+ u8 origin;
struct map *map;
struct source_line *source;
struct source_line *lines;
@@ -115,6 +119,36 @@ struct sym_entry {
* Source functions
*/
+/* most GUI terminals set LINES (although some don't export it) */
+static int term_rows(void)
+{
+ char *lines_string = getenv("LINES");
+ int n_lines;
+
+ if (lines_string && (n_lines = atoi(lines_string)) > 0)
+ return n_lines;
+#ifdef TIOCGWINSZ
+ else {
+ struct winsize ws;
+ if (!ioctl(1, TIOCGWINSZ, &ws) && ws.ws_row)
+ return ws.ws_row;
+ }
+#endif
+ return 25;
+}
+
+static void update_print_entries(void)
+{
+ print_entries = term_rows();
+ if (print_entries > 9)
+ print_entries -= 9;
+}
+
+static void sig_winch_handler(int sig __used)
+{
+ update_print_entries();
+}
+
static void parse_source(struct sym_entry *syme)
{
struct symbol *sym;
@@ -318,7 +352,7 @@ static void show_details(struct sym_entry *syme)
}
/*
- * Symbols will be added here in record_ip and will get out
+ * Symbols will be added here in event__process_sample and will get out
* after decayed.
*/
static LIST_HEAD(active_symbols);
@@ -400,6 +434,13 @@ static void print_sym_table(void)
list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
syme->snap_count = syme->count[snap];
if (syme->snap_count != 0) {
+ if ((hide_user_symbols &&
+ syme->origin == PERF_RECORD_MISC_USER) ||
+ (hide_kernel_symbols &&
+ syme->origin == PERF_RECORD_MISC_KERNEL)) {
+ list_remove_active_sym(syme);
+ continue;
+ }
syme->weight = sym_weight(syme);
rb_insert_active_sym(&tmp, syme);
sum_ksamples += syme->snap_count;
@@ -459,18 +500,18 @@ static void print_sym_table(void)
}
if (nr_counters == 1)
- printf(" samples pcnt");
+ printf(" samples pcnt");
else
- printf(" weight samples pcnt");
+ printf(" weight samples pcnt");
if (verbose)
printf(" RIP ");
- printf(" kernel function\n");
- printf(" %s _______ _____",
+ printf(" function DSO\n");
+ printf(" %s _______ _____",
nr_counters == 1 ? " " : "______");
if (verbose)
- printf(" ________________");
- printf(" _______________\n\n");
+ printf(" ________________");
+ printf(" ________________________________ ________________\n\n");
for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
struct symbol *sym;
@@ -486,16 +527,15 @@ static void print_sym_table(void)
sum_ksamples));
if (nr_counters == 1 || !display_weighted)
- printf("%20.2f - ", syme->weight);
+ printf("%20.2f ", syme->weight);
else
- printf("%9.1f %10ld - ", syme->weight, syme->snap_count);
+ printf("%9.1f %10ld ", syme->weight, syme->snap_count);
percent_color_fprintf(stdout, "%4.1f%%", pcnt);
if (verbose)
- printf(" - %016llx", sym->start);
- printf(" : %s", sym->name);
- if (syme->map->dso->name[0] == '[')
- printf(" \t%s", syme->map->dso->name);
+ printf(" %016llx", sym->start);
+ printf(" %-32s", sym->name);
+ printf(" %s", syme->map->dso->short_name);
printf("\n");
}
}
@@ -608,6 +648,12 @@ static void print_mapped_keys(void)
if (nr_counters > 1)
fprintf(stdout, "\t[w] toggle display weighted/count[E]r. \t(%d)\n", display_weighted ? 1 : 0);
+ fprintf(stdout,
+ "\t[K] hide kernel_symbols symbols. \t(%s)\n",
+ hide_kernel_symbols ? "yes" : "no");
+ fprintf(stdout,
+ "\t[U] hide user symbols. \t(%s)\n",
+ hide_user_symbols ? "yes" : "no");
fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", zero ? 1 : 0);
fprintf(stdout, "\t[qQ] quit.\n");
}
@@ -621,6 +667,8 @@ static int key_mapped(int c)
case 'z':
case 'q':
case 'Q':
+ case 'K':
+ case 'U':
return 1;
case 'E':
case 'w':
@@ -669,6 +717,11 @@ static void handle_keypress(int c)
break;
case 'e':
prompt_integer(&print_entries, "Enter display entries (lines)");
+ if (print_entries == 0) {
+ update_print_entries();
+ signal(SIGWINCH, sig_winch_handler);
+ } else
+ signal(SIGWINCH, SIG_DFL);
break;
case 'E':
if (nr_counters > 1) {
@@ -693,6 +746,9 @@ static void handle_keypress(int c)
case 'F':
prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)");
break;
+ case 'K':
+ hide_kernel_symbols = !hide_kernel_symbols;
+ break;
case 'q':
case 'Q':
printf("exiting.\n");
@@ -712,6 +768,9 @@ static void handle_keypress(int c)
pthread_mutex_unlock(&syme->source_lock);
}
break;
+ case 'U':
+ hide_user_symbols = !hide_user_symbols;
+ break;
case 'w':
display_weighted = ~display_weighted;
break;
@@ -790,7 +849,7 @@ static int symbol_filter(struct map *map, struct symbol *sym)
strstr(name, "_text_end"))
return 1;
- syme = dso__sym_priv(map->dso, sym);
+ syme = symbol__priv(sym);
syme->map = map;
pthread_mutex_init(&syme->source_lock, NULL);
if (!sym_filter_entry && sym_filter && !strcmp(name, sym_filter))
@@ -808,8 +867,7 @@ static int symbol_filter(struct map *map, struct symbol *sym)
static int parse_symbols(void)
{
- if (dsos__load_kernel(vmlinux_name, sizeof(struct sym_entry),
- symbol_filter, 1) <= 0)
+ if (dsos__load_kernel(vmlinux_name, symbol_filter, 1) <= 0)
return -1;
if (dump_symtab)
@@ -818,41 +876,104 @@ static int parse_symbols(void)
return 0;
}
-/*
- * Binary search in the histogram table and record the hit:
- */
-static void record_ip(u64 ip, int counter)
+static void event__process_sample(const event_t *self, int counter)
{
+ u64 ip = self->ip.ip;
struct map *map;
- struct symbol *sym = kernel_maps__find_symbol(ip, &map);
-
- if (sym != NULL) {
- struct sym_entry *syme = dso__sym_priv(map->dso, sym);
-
- if (!syme->skip) {
- syme->count[counter]++;
- record_precise_ip(syme, counter, ip);
- pthread_mutex_lock(&active_symbols_lock);
- if (list_empty(&syme->node) || !syme->node.next)
- __list_insert_active_sym(syme);
- pthread_mutex_unlock(&active_symbols_lock);
+ struct sym_entry *syme;
+ struct symbol *sym;
+ u8 origin = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
+
+ switch (origin) {
+ case PERF_RECORD_MISC_USER: {
+ struct thread *thread;
+
+ if (hide_user_symbols)
+ return;
+
+ thread = threads__findnew(self->ip.pid);
+ if (thread == NULL)
return;
+
+ map = thread__find_map(thread, ip);
+ if (map != NULL) {
+ ip = map->map_ip(map, ip);
+ sym = map__find_symbol(map, ip, symbol_filter);
+ if (sym == NULL)
+ return;
+ userspace_samples++;
+ break;
}
}
+ /*
+ * If this is outside of all known maps,
+ * and is a negative address, try to look it
+ * up in the kernel dso, as it might be a
+ * vsyscall or vdso (which executes in user-mode).
+ */
+ if ((long long)ip >= 0)
+ return;
+ /* Fall thru */
+ case PERF_RECORD_MISC_KERNEL:
+ if (hide_kernel_symbols)
+ return;
+
+ sym = kernel_maps__find_symbol(ip, &map);
+ if (sym == NULL)
+ return;
+ break;
+ default:
+ return;
+ }
- samples--;
+ syme = symbol__priv(sym);
+
+ if (!syme->skip) {
+ syme->count[counter]++;
+ syme->origin = origin;
+ record_precise_ip(syme, counter, ip);
+ pthread_mutex_lock(&active_symbols_lock);
+ if (list_empty(&syme->node) || !syme->node.next)
+ __list_insert_active_sym(syme);
+ pthread_mutex_unlock(&active_symbols_lock);
+ ++samples;
+ return;
+ }
}
-static void process_event(u64 ip, int counter, int user)
+static void event__process_mmap(event_t *self)
{
- samples++;
+ struct thread *thread = threads__findnew(self->mmap.pid);
- if (user) {
- userspace_samples++;
- return;
+ if (thread != NULL) {
+ struct map *map = map__new(&self->mmap, NULL, 0);
+ if (map != NULL)
+ thread__insert_map(thread, map);
}
+}
- record_ip(ip, counter);
+static void event__process_comm(event_t *self)
+{
+ struct thread *thread = threads__findnew(self->comm.pid);
+
+ if (thread != NULL)
+ thread__set_comm(thread, self->comm.comm);
+}
+
+static int event__process(event_t *event)
+{
+ switch (event->header.type) {
+ case PERF_RECORD_COMM:
+ event__process_comm(event);
+ break;
+ case PERF_RECORD_MMAP:
+ event__process_mmap(event);
+ break;
+ default:
+ break;
+ }
+
+ return 0;
}
struct mmap_data {
@@ -925,13 +1046,11 @@ static void mmap_read_counter(struct mmap_data *md)
event = &event_copy;
}
+ if (event->header.type == PERF_RECORD_SAMPLE)
+ event__process_sample(event, md->counter);
+ else
+ event__process(event);
old += size;
-
- if (event->header.type == PERF_RECORD_SAMPLE) {
- int user =
- (event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK) == PERF_RECORD_MISC_USER;
- process_event(event->ip.ip, md->counter, user);
- }
}
md->prev = old;
@@ -973,6 +1092,7 @@ static void start_counter(int i, int counter)
}
attr->inherit = (cpu < 0) && inherit;
+ attr->mmap = 1;
try_again:
fd[i][counter] = sys_perf_event_open(attr, target_pid, cpu, group_fd, 0);
@@ -980,7 +1100,7 @@ try_again:
if (fd[i][counter] < 0) {
int err = errno;
- if (err == EPERM)
+ if (err == EPERM || err == EACCES)
die("No permission - are you root?\n");
/*
* If it's cycles then fall back to hrtimer
@@ -1031,6 +1151,11 @@ static int __cmd_top(void)
int i, counter;
int ret;
+ if (target_pid != -1)
+ event__synthesize_thread(target_pid, event__process);
+ else
+ event__synthesize_threads(event__process);
+
for (i = 0; i < nr_cpus; i++) {
group_fd = -1;
for (counter = 0; counter < nr_counters; counter++)
@@ -1087,6 +1212,8 @@ static const struct option options[] = {
OPT_INTEGER('C', "CPU", &profile_cpu,
"CPU to profile on"),
OPT_STRING('k', "vmlinux", &vmlinux_name, "file", "vmlinux pathname"),
+ OPT_BOOLEAN('K', "hide_kernel_symbols", &hide_kernel_symbols,
+ "hide kernel symbols"),
OPT_INTEGER('m', "mmap-pages", &mmap_pages,
"number of mmap data pages"),
OPT_INTEGER('r', "realtime", &realtime_prio,
@@ -1109,6 +1236,8 @@ static const struct option options[] = {
"profile at this frequency"),
OPT_INTEGER('E', "entries", &print_entries,
"display this many functions"),
+ OPT_BOOLEAN('U', "hide_user_symbols", &hide_user_symbols,
+ "hide user symbols"),
OPT_BOOLEAN('v', "verbose", &verbose,
"be more verbose (show counter open errors, etc)"),
OPT_END()
@@ -1118,7 +1247,7 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
{
int counter;
- symbol__init();
+ symbol__init(sizeof(struct sym_entry));
page_size = sysconf(_SC_PAGE_SIZE);
@@ -1172,5 +1301,10 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
if (target_pid != -1 || profile_cpu != -1)
nr_cpus = 1;
+ if (print_entries == 0) {
+ update_print_entries();
+ signal(SIGWINCH, sig_winch_handler);
+ }
+
return __cmd_top();
}
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-21 14:58:44 +0000