diff options
| author | David Ahern <daahern@cisco.com> | 2010-12-08 03:39:46 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-12-09 14:07:07 +0100 |
| commit | b226a5a72901bc9c73d639ea2e53e6c304bf3b74 (patch) | |
| tree | 3cc388b8450f95af1909c1ce00978b5db6ed17a5 /tools/perf | |
| parent | x86: Address 'unused' warning in hw_nmi.c again (diff) | |
| download | linux-b226a5a72901bc9c73d639ea2e53e6c304bf3b74.tar.xz linux-b226a5a72901bc9c73d639ea2e53e6c304bf3b74.zip | |
perf report: Allow user to specify path to kallsyms file
This is useful for analyzing a perf data file on a different system than
the one data was collected on and still include symbols from loaded
kernel modules in the output.
Commiter note: Updated the man page accordingly.
LKML-Reference: <1291775986-16475-1-git-send-email-daahern@cisco.com>
Signed-off-by: David Ahern <daahern@cisco.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/Documentation/perf-report.txt | 3 | ||||
| -rw-r--r-- | tools/perf/builtin-report.c | 2 | ||||
| -rw-r--r-- | tools/perf/util/symbol.c | 9 | ||||
| -rw-r--r-- | tools/perf/util/symbol.h | 1 |
4 files changed, 13 insertions, 2 deletions
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt index 59a1f57f2bb7..fefea77ec6e9 100644 --- a/tools/perf/Documentation/perf-report.txt +++ b/tools/perf/Documentation/perf-report.txt @@ -104,6 +104,9 @@ OPTIONS --vmlinux=<file>:: vmlinux pathname +--kallsyms=<file>:: + kallsyms pathname + -m:: --modules:: Load module symbols. WARNING: This should only be used with -k and diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index 904519fba434..b6a2a899aa8f 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -443,6 +443,8 @@ static const struct option options[] = { "dump raw trace in ASCII"), OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, "file", "vmlinux pathname"), + OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, + "file", "kallsyms pathname"), OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules, "load module symbols - WARNING: use only with -k and LIVE kernel"), diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index a348906b587d..f40c076aeb7b 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -1830,8 +1830,8 @@ static int dso__load_kernel_sym(struct dso *self, struct map *map, const char *kallsyms_filename = NULL; char *kallsyms_allocated_filename = NULL; /* - * Step 1: if the user specified a vmlinux filename, use it and only - * it, reporting errors to the user if it cannot be used. + * Step 1: if the user specified a kallsyms or vmlinux filename, use + * it and only it, reporting errors to the user if it cannot be used. * * For instance, try to analyse an ARM perf.data file _without_ a * build-id, or if the user specifies the wrong path to the right @@ -1844,6 +1844,11 @@ static int dso__load_kernel_sym(struct dso *self, struct map *map, * validation in dso__load_vmlinux and will bail out if they don't * match. */ + if (symbol_conf.kallsyms_name != NULL) { + kallsyms_filename = symbol_conf.kallsyms_name; + goto do_kallsyms; + } + if (symbol_conf.vmlinux_name != NULL) { err = dso__load_vmlinux(self, map, symbol_conf.vmlinux_name, filter); diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h index 038f2201ee09..12defbe18c13 100644 --- a/tools/perf/util/symbol.h +++ b/tools/perf/util/symbol.h @@ -72,6 +72,7 @@ struct symbol_conf { show_cpu_utilization, initialized; const char *vmlinux_name, + *kallsyms_name, *source_prefix, *field_sep; const char *default_guest_vmlinux_name, |