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authorArnaldo Carvalho de Melo <acme@redhat.com>2009-11-20 20:51:27 -0200
committerIngo Molnar <mingo@elte.hu>2009-11-21 14:11:33 +0100
commitc338aee853db197e1855b393e6d6cc667784537f (patch)
treef97fea21c608a689144302b8dd78ef29bfaa5c88 /tools/perf/builtin-annotate.c
parent78075caad99dc36ec6ef5826b7a5273ea14295fc (diff)
perf symbols: Do lazy symtab loading for the kernel & modules too
Just like we do with the other DSOs. This also simplifies the kernel_maps setup process, now all that the tools need to do is to call kernel_maps__init and the maps for the modules and kernel will be created, then, later, when kernel_maps__find_symbol() is used, it will also call maps__find_symbol that already checks if the symtab was loaded, loading it if needed. Now if one does 'perf top --hide_kernel_symbols' we won't pay the price of loading the (many) symbols in /proc/kallsyms or vmlinux. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1258757489-5978-4-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/builtin-annotate.c')
-rw-r--r--tools/perf/builtin-annotate.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index b6da1476ab1b..203152729a68 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -157,7 +157,7 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head)
if (event->header.misc & PERF_RECORD_MISC_KERNEL) {
level = 'k';
- sym = kernel_maps__find_symbol(ip, &map);
+ sym = kernel_maps__find_symbol(ip, &map, symbol_filter);
dump_printf(" ...... dso: %s\n",
map ? map->dso->long_name : "<not found>");
} else if (event->header.misc & PERF_RECORD_MISC_USER) {
@@ -637,9 +637,9 @@ static int __cmd_annotate(void)
exit(0);
}
- if (load_kernel(symbol_filter, use_modules) < 0) {
- perror("failed to load kernel symbols");
- return EXIT_FAILURE;
+ if (kernel_maps__init(use_modules) < 0) {
+ pr_err("failed to create kernel maps for symbol resolution\b");
+ return -1;
}
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