linux_dsm_epyc7002/tools/perf/tests/map_groups.c
Jiri Olsa 4f600bcf65 perf tests: Add map_groups__merge_in test
Add map_groups__merge_in test to test the map_groups__merge_in function
usage - merging kcore maps into existing eBPF maps.

Committer testing:

  # perf test merge
  59: map_groups__merge_in                                  : Ok
  # perf test -v merge
  59: map_groups__merge_in                                  :
  --- start ---
  test child forked, pid 8349
  test child finished with 0
  ---- end ----
  map_groups__merge_in: Ok
  #

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Link: http://lkml.kernel.org/r/20190508132010.14512-10-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:44 -03:00

121 lines
3.1 KiB
C

#include <linux/compiler.h>
#include <linux/kernel.h>
#include "tests.h"
#include "map.h"
#include "map_groups.h"
#include "dso.h"
#include "debug.h"
struct map_def {
const char *name;
u64 start;
u64 end;
};
static int check_maps(struct map_def *merged, unsigned int size, struct map_groups *mg)
{
struct map *map;
unsigned int i = 0;
map = map_groups__first(mg);
while (map) {
TEST_ASSERT_VAL("wrong map start", map->start == merged[i].start);
TEST_ASSERT_VAL("wrong map end", map->end == merged[i].end);
TEST_ASSERT_VAL("wrong map name", !strcmp(map->dso->name, merged[i].name));
TEST_ASSERT_VAL("wrong map refcnt", refcount_read(&map->refcnt) == 2);
i++;
map = map_groups__next(map);
TEST_ASSERT_VAL("less maps expected", (map && i < size) || (!map && i == size));
}
return TEST_OK;
}
int test__map_groups__merge_in(struct test *t __maybe_unused, int subtest __maybe_unused)
{
struct map_groups mg;
unsigned int i;
struct map_def bpf_progs[] = {
{ "bpf_prog_1", 200, 300 },
{ "bpf_prog_2", 500, 600 },
{ "bpf_prog_3", 800, 900 },
};
struct map_def merged12[] = {
{ "kcore1", 100, 200 },
{ "bpf_prog_1", 200, 300 },
{ "kcore1", 300, 500 },
{ "bpf_prog_2", 500, 600 },
{ "kcore1", 600, 800 },
{ "bpf_prog_3", 800, 900 },
{ "kcore1", 900, 1000 },
};
struct map_def merged3[] = {
{ "kcore1", 100, 200 },
{ "bpf_prog_1", 200, 300 },
{ "kcore1", 300, 500 },
{ "bpf_prog_2", 500, 600 },
{ "kcore1", 600, 800 },
{ "bpf_prog_3", 800, 900 },
{ "kcore1", 900, 1000 },
{ "kcore3", 1000, 1100 },
};
struct map *map_kcore1, *map_kcore2, *map_kcore3;
int ret;
map_groups__init(&mg, NULL);
for (i = 0; i < ARRAY_SIZE(bpf_progs); i++) {
struct map *map;
map = dso__new_map(bpf_progs[i].name);
TEST_ASSERT_VAL("failed to create map", map);
map->start = bpf_progs[i].start;
map->end = bpf_progs[i].end;
map_groups__insert(&mg, map);
map__put(map);
}
map_kcore1 = dso__new_map("kcore1");
TEST_ASSERT_VAL("failed to create map", map_kcore1);
map_kcore2 = dso__new_map("kcore2");
TEST_ASSERT_VAL("failed to create map", map_kcore2);
map_kcore3 = dso__new_map("kcore3");
TEST_ASSERT_VAL("failed to create map", map_kcore3);
/* kcore1 map overlaps over all bpf maps */
map_kcore1->start = 100;
map_kcore1->end = 1000;
/* kcore2 map hides behind bpf_prog_2 */
map_kcore2->start = 550;
map_kcore2->end = 570;
/* kcore3 map hides behind bpf_prog_3, kcore1 and adds new map */
map_kcore3->start = 880;
map_kcore3->end = 1100;
ret = map_groups__merge_in(&mg, map_kcore1);
TEST_ASSERT_VAL("failed to merge map", !ret);
ret = check_maps(merged12, ARRAY_SIZE(merged12), &mg);
TEST_ASSERT_VAL("merge check failed", !ret);
ret = map_groups__merge_in(&mg, map_kcore2);
TEST_ASSERT_VAL("failed to merge map", !ret);
ret = check_maps(merged12, ARRAY_SIZE(merged12), &mg);
TEST_ASSERT_VAL("merge check failed", !ret);
ret = map_groups__merge_in(&mg, map_kcore3);
TEST_ASSERT_VAL("failed to merge map", !ret);
ret = check_maps(merged3, ARRAY_SIZE(merged3), &mg);
TEST_ASSERT_VAL("merge check failed", !ret);
return TEST_OK;
}