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perf symbols: Add new option --ignore-vmlinux for perf top 

Running "perf top" on a machine with possibly invalid or non-matching
vmlinux at the various places results in no symbol resolving despite
/proc/kallsyms being present and valid.

Add a new option --ignore-vmlinux to explicitly indicate that we do not
want to use these kernels and just use what we have (kallsyms).

Signed-off-by: Willy Tarreau <w@1wt.eu>
Cc: Ingo Molnar <mingo@redhat.com>
Link: http://lkml.kernel.org/r/20130914083259.GA3418@1wt.eu
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Willy Tarreau 2013-09-14 10:32:59 +02:00 committed by Arnaldo Carvalho de Melo
parent dd96c46b5c
commit fc2be6968e
3 changed files with 5 additions and 2 deletions
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2
tools/perf/builtin-top.c
View File

@ -1073,6 +1073,8 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
"list of cpus to monitor"),
OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
"file", "vmlinux pathname"),
OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
"don't load vmlinux even if found"),
OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
"hide kernel symbols"),
OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",

4
tools/perf/util/symbol.c
View File

@ -1215,7 +1215,7 @@ static int dso__load_kernel_sym(struct dso *dso, struct map *map,
goto do_kallsyms;
}
if (symbol_conf.vmlinux_name != NULL) {
if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) {
err = dso__load_vmlinux(dso, map,
symbol_conf.vmlinux_name, filter);
if (err > 0) {
@ -1227,7 +1227,7 @@ static int dso__load_kernel_sym(struct dso *dso, struct map *map,
return err;
}
if (vmlinux_path != NULL) {
if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) {
err = dso__load_vmlinux_path(dso, map, filter);
if (err > 0)
return err;

1
tools/perf/util/symbol.h
View File

@ -85,6 +85,7 @@ struct symbol_conf {
unsigned short priv_size;
unsigned short nr_events;
bool try_vmlinux_path,
ignore_vmlinux,
show_kernel_path,
use_modules,
sort_by_name,