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author | Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> | 2010-10-21 19:13:41 +0900 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-10-21 16:11:44 -0200 |
commit | 469b9b88488e89114bb3e9ac5ee7906b7b96123f (patch) | |
tree | 9f002195a8b1167eddbe560ac834e6ba2dedb19f /tools/perf/builtin-probe.c | |
parent | fb8c5a56c7ddbc2b0d2ee7a8da60fe1355f75141 (diff) | |
download | kernel_samsung_crespo-469b9b88488e89114bb3e9ac5ee7906b7b96123f.zip kernel_samsung_crespo-469b9b88488e89114bb3e9ac5ee7906b7b96123f.tar.gz kernel_samsung_crespo-469b9b88488e89114bb3e9ac5ee7906b7b96123f.tar.bz2 |
perf probe: Add basic module support
Add basic module probe support on perf probe. This introduces "--module
<MODNAME>" option to perf probe for putting probes and showing lines and
variables in the given module.
Currently, this supports only probing on running modules. Supporting off-line
module probing is the next step.
e.g.)
[show lines]
# ./perf probe --module drm -L drm_vblank_info
<drm_vblank_info:0>
0 int drm_vblank_info(struct seq_file *m, void *data)
1 {
struct drm_info_node *node = (struct drm_info_node *) m->private
3 struct drm_device *dev = node->minor->dev;
...
[show vars]
# ./perf probe --module drm -V drm_vblank_info:3
Available variables at drm_vblank_info:3
@<drm_vblank_info+20>
(unknown_type) data
struct drm_info_node* node
struct seq_file* m
[put a probe]
# ./perf probe --module drm drm_vblank_info:3 node m
Add new event:
probe:drm_vblank_info (on drm_vblank_info:3 with node m)
You can now use it on all perf tools, such as:
perf record -e probe:drm_vblank_info -aR sleep 1
[list probes]
# ./perf probe -l
probe:drm_vblank_info (on drm_vblank_info:3@drivers/gpu/drm/drm_info.c with ...
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20101021101341.3542.71638.stgit@ltc236.sdl.hitachi.co.jp>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-probe.c')
-rw-r--r-- | tools/perf/builtin-probe.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index bdf60cf..2e000c0 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -57,6 +57,7 @@ static struct { struct perf_probe_event events[MAX_PROBES]; struct strlist *dellist; struct line_range line_range; + const char *target_module; int max_probe_points; } params; @@ -162,8 +163,8 @@ static const char * const probe_usage[] = { "perf probe [<options>] --del '[GROUP:]EVENT' ...", "perf probe --list", #ifdef DWARF_SUPPORT - "perf probe --line 'LINEDESC'", - "perf probe [--externs] --vars 'PROBEPOINT'", + "perf probe [<options>] --line 'LINEDESC'", + "perf probe [<options>] --vars 'PROBEPOINT'", #endif NULL }; @@ -214,6 +215,8 @@ static const struct option options[] = { "file", "vmlinux pathname"), OPT_STRING('s', "source", &symbol_conf.source_prefix, "directory", "path to kernel source"), + OPT_STRING('m', "module", ¶ms.target_module, + "modname", "target module name"), #endif OPT__DRY_RUN(&probe_event_dry_run), OPT_INTEGER('\0', "max-probes", ¶ms.max_probe_points, @@ -278,7 +281,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) usage_with_options(probe_usage, options); } - ret = show_line_range(¶ms.line_range); + ret = show_line_range(¶ms.line_range, params.target_module); if (ret < 0) pr_err(" Error: Failed to show lines. (%d)\n", ret); return ret; @@ -291,6 +294,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) } ret = show_available_vars(params.events, params.nevents, params.max_probe_points, + params.target_module, params.show_ext_vars); if (ret < 0) pr_err(" Error: Failed to show vars. (%d)\n", ret); @@ -310,6 +314,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) if (params.nevents) { ret = add_perf_probe_events(params.events, params.nevents, params.max_probe_points, + params.target_module, params.force_add); if (ret < 0) { pr_err(" Error: Failed to add events. (%d)\n", ret); |