perf top: Introduce --hide_{user,kernel}_symbols

Default continues to be showing all symbols. 'K' and 'U' can be
used to toggle showing kernel and user symbols.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <1258415125-15019-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 3af9520..89b7f68 100644 (file)
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -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;
@@ -430,6 +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;
@@ -637,6 +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");
 }
@@ -650,6 +667,8 @@ static int key_mapped(int c)
                case 'z':
                case 'q':
                case 'Q':
+               case 'K':
+               case 'U':
                        return 1;
                case 'E':
                case 'w':
@@ -727,6 +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");
@@ -746,6 +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;
@@ -857,11 +882,16 @@ static void event__process_sample(const event_t *self, int counter)
        struct map *map;
        struct sym_entry *syme;
        struct symbol *sym;
+       u8 origin = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 
-       switch (self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK) {
+       switch (origin) {
        case PERF_RECORD_MISC_USER: {
-               struct thread *thread = threads__findnew(self->ip.pid);
+               struct thread *thread;
 
+               if (hide_user_symbols)
+                       return;
+
+               thread = threads__findnew(self->ip.pid);
                if (thread == NULL)
                        return;
 
@@ -885,6 +915,9 @@ static void event__process_sample(const event_t *self, int counter)
                        return;
                /* Fall thru */
        case PERF_RECORD_MISC_KERNEL:
+               if (hide_kernel_symbols)
+                       return;
+
                sym = kernel_maps__find_symbol(ip, &map);
                if (sym == NULL)
                        return;
@@ -897,6 +930,7 @@ static void event__process_sample(const event_t *self, int counter)
 
        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)
@@ -1178,6 +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,
@@ -1200,6 +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()