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authorArnaldo Carvalho de Melo <acme@redhat.com>2019-11-04 16:09:48 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2019-11-12 08:20:53 -0300
commitf2baa060cd766f4e585339423891e0063179d702 (patch)
tree27fd8fc96e06161dba7946499c897f52568127d7 /tools/perf
parentde90d513b2464d28a17fc4eaada97f4ad742ba00 (diff)
perf symbols: Stop using map->groups, we can use kmaps instead
To test that that function is being called I just added a probe on that place, enabled it via 'perf trace' asking for at most 16 levels of backtraces, system wide, and then ran 'perf top' on another xterm, voilĂ : # perf probe -x ~/bin/perf dso__process_kernel_symbol Added new event: probe_perf:dso__process_kernel_symbol (on dso__process_kernel_symbol in /home/acme/bin/perf) You can now use it in all perf tools, such as: perf record -e probe_perf:dso__process_kernel_symbol -aR sleep 1 # perf trace -e probe_perf:dso__process_kernel_symbol/max-stack=16/ --max-events=2 # perf trace -e probe_perf:dso__process_kernel_symbol/max-stack=16/ --max-events=2 0.000 :17345/17345 probe_perf:dso__process_kernel_symbol(__probe_ip: 5680224) dso__process_kernel_symbol (/home/acme/bin/perf) dso__load_vmlinux (/home/acme/bin/perf) dso__load_vmlinux_path (/home/acme/bin/perf) dso__load (/home/acme/bin/perf) map__load (/home/acme/bin/perf) thread__find_map (/home/acme/bin/perf) machine__resolve (/home/acme/bin/perf) deliver_event (/home/acme/bin/perf) __ordered_events__flush.part.0 (/home/acme/bin/perf) process_thread (/home/acme/bin/perf) start_thread (/usr/lib64/libpthread-2.29.so) 0.064 :17345/17345 probe_perf:dso__process_kernel_symbol(__probe_ip: 5680224) dso__process_kernel_symbol (/home/acme/bin/perf) dso__load_vmlinux (/home/acme/bin/perf) dso__load_vmlinux_path (/home/acme/bin/perf) dso__load (/home/acme/bin/perf) map__load (/home/acme/bin/perf) thread__find_map (/home/acme/bin/perf) machine__resolve (/home/acme/bin/perf) deliver_event (/home/acme/bin/perf) __ordered_events__flush.part.0 (/home/acme/bin/perf) process_thread (/home/acme/bin/perf) start_thread (/usr/lib64/libpthread-2.29.so) # # perf stat -e probe_perf:dso__process_kernel_symbol ^C Performance counter stats for 'system wide': 107,308 probe_perf:dso__process_kernel_symbol 8.215399813 seconds time elapsed # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-5fy66x5hr5ct9pmw84jkiwvm@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/symbol-elf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 66f4be1df573..16776d5fbaea 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -934,7 +934,7 @@ static int dso__process_kernel_symbol(struct dso *dso, struct map *map,
* we still are sure to have a reference to this DSO via
* *curr_map->dso.
*/
- dsos__add(&map->groups->machine->dsos, curr_dso);
+ dsos__add(&kmaps->machine->dsos, curr_dso);
/* kmaps already got it */
map__put(curr_map);
dso__set_loaded(curr_dso);