diff options
| author | Ravi Bangoria <ravi.bangoria@linux.ibm.com> | 2018-08-20 10:12:50 +0530 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-09-24 04:44:54 -0400 |
| commit | 5a5e3d3ceae2121590d67258a4e658d938b4a46d (patch) | |
| tree | 8aaaa9e1c859d86f0809454659dc5eaa68c13ebf /tools/perf/util/symbol.h | |
| parent | ccea8727dc27d8f46df6557f9260ab32760ef409 (diff) | |
perf probe: Support SDT markers having reference counter (semaphore)
With this, perf buildid-cache will save SDT markers with reference
counter in probe cache. Perf probe will be able to probe markers
having reference counter. Ex,
# readelf -n /tmp/tick | grep -A1 loop2
Name: loop2
... Semaphore: 0x0000000010020036
# ./perf buildid-cache --add /tmp/tick
# ./perf probe sdt_tick:loop2
# ./perf stat -e sdt_tick:loop2 /tmp/tick
hi: 0
hi: 1
hi: 2
^C
Performance counter stats for '/tmp/tick':
3 sdt_tick:loop2
2.561851452 seconds time elapsed
Link: http://lkml.kernel.org/r/20180820044250.11659-5-ravi.bangoria@linux.ibm.com
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Reviewed-by: Song Liu <songliubraving@fb.com>
Tested-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'tools/perf/util/symbol.h')
| -rw-r--r-- | tools/perf/util/symbol.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h index f25fae4b5743..20f49779116b 100644 --- a/tools/perf/util/symbol.h +++ b/tools/perf/util/symbol.h @@ -379,12 +379,19 @@ int get_sdt_note_list(struct list_head *head, const char *target); int cleanup_sdt_note_list(struct list_head *sdt_notes); int sdt_notes__get_count(struct list_head *start); +#define SDT_PROBES_SCN ".probes" #define SDT_BASE_SCN ".stapsdt.base" #define SDT_NOTE_SCN ".note.stapsdt" #define SDT_NOTE_TYPE 3 #define SDT_NOTE_NAME "stapsdt" #define NR_ADDR 3 +enum { + SDT_NOTE_IDX_LOC = 0, + SDT_NOTE_IDX_BASE, + SDT_NOTE_IDX_REFCTR, +}; + struct mem_info *mem_info__new(void); struct mem_info *mem_info__get(struct mem_info *mi); void mem_info__put(struct mem_info *mi); |