diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2013-12-03 09:23:10 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-12-04 13:46:36 -0300 |
| commit | 906049c8276eb99af997f73d602649a98e360035 (patch) | |
| tree | 2999cc638bb5cb88f76b17176f8a3a780222759d | |
| parent | 0058aef65eda9c9dde8253af702d542ba7eef697 (diff) | |
| download | talos-obmc-linux-906049c8276eb99af997f73d602649a98e360035.tar.gz talos-obmc-linux-906049c8276eb99af997f73d602649a98e360035.zip | |
perf tools: Do not disable source line lookup just because of 1 failure
Looking up an ip's source file name and line number does not succeed
always. Current logic disables the lookup for a dso entirely on any
failure. Change it so that disabling never happens if there has ever
been a successful lookup for that dso but disable if the first 123
lookups fail.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1386055390-13757-8-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/util/dso.c | 1 | ||||
| -rw-r--r-- | tools/perf/util/dso.h | 1 | ||||
| -rw-r--r-- | tools/perf/util/srcline.c | 20 |
3 files changed, 18 insertions, 4 deletions
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c index 49da9684f635..a0c7c591f4b2 100644 --- a/tools/perf/util/dso.c +++ b/tools/perf/util/dso.c @@ -451,6 +451,7 @@ struct dso *dso__new(const char *name) dso->sorted_by_name = 0; dso->has_build_id = 0; dso->has_srcline = 1; + dso->a2l_fails = 1; dso->kernel = DSO_TYPE_USER; dso->needs_swap = DSO_SWAP__UNSET; INIT_LIST_HEAD(&dso->node); diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h index 7142e5261266..384f2d97e38e 100644 --- a/tools/perf/util/dso.h +++ b/tools/perf/util/dso.h @@ -79,6 +79,7 @@ struct dso { struct rb_root cache; void *a2l; char *symsrc_filename; + unsigned int a2l_fails; enum dso_kernel_type kernel; enum dso_swap_type needs_swap; enum dso_binary_type symtab_type; diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c index 93795f9c2480..0c075560ad46 100644 --- a/tools/perf/util/srcline.c +++ b/tools/perf/util/srcline.c @@ -244,6 +244,12 @@ void dso__free_a2l(struct dso *dso __maybe_unused) #endif /* HAVE_LIBBFD_SUPPORT */ +/* + * Number of addr2line failures (without success) before disabling it for that + * dso. + */ +#define A2L_FAIL_LIMIT 123 + char *get_srcline(struct dso *dso, unsigned long addr) { char *file = NULL; @@ -268,15 +274,21 @@ char *get_srcline(struct dso *dso, unsigned long addr) if (!addr2line(dso_name, addr, &file, &line, dso)) goto out; - if (asprintf(&srcline, "%s:%u", file, line) < 0) - srcline = SRCLINE_UNKNOWN; + if (asprintf(&srcline, "%s:%u", file, line) < 0) { + free(file); + goto out; + } + + dso->a2l_fails = 0; free(file); return srcline; out: - dso->has_srcline = 0; - dso__free_a2l(dso); + if (dso->a2l_fails && ++dso->a2l_fails > A2L_FAIL_LIMIT) { + dso->has_srcline = 0; + dso__free_a2l(dso); + } return SRCLINE_UNKNOWN; } |
