Adding mem2node object automated test.

The test prepares few artificial node - memory maps and
verifies the mem2node object returns proper node values
to given addresses.

Link: http://lkml.kernel.org/n/tip-17xdxr5k1zfca9o3fymow...@git.kernel.org
Signed-off-by: Jiri Olsa <jo...@kernel.org>
---
 tools/perf/tests/Build          |  1 +
 tools/perf/tests/builtin-test.c |  4 +++
 tools/perf/tests/mem2node.c     | 73 +++++++++++++++++++++++++++++++++++++++++
 tools/perf/tests/tests.h        |  1 +
 4 files changed, 79 insertions(+)
 create mode 100644 tools/perf/tests/mem2node.c

diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index 87bf3edb037c..45782220ac23 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -47,6 +47,7 @@ perf-y += bitmap.o
 perf-y += perf-hooks.o
 perf-y += clang.o
 perf-y += unit_number__scnprintf.o
+perf-y += mem2node.o
 
 $(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c tests/Build
        $(call rule_mkdir)
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index fafa014240cd..09071ef4434f 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -271,6 +271,10 @@ static struct test generic_tests[] = {
                .func = test__unit_number__scnprint,
        },
        {
+               .desc = "mem2node",
+               .func = test__mem2node,
+       },
+       {
                .func = NULL,
        },
 };
diff --git a/tools/perf/tests/mem2node.c b/tools/perf/tests/mem2node.c
new file mode 100644
index 000000000000..c883607dcd22
--- /dev/null
+++ b/tools/perf/tests/mem2node.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/compiler.h>
+#include <linux/bitmap.h>
+#include "cpumap.h"
+#include "mem2node.h"
+#include "tests.h"
+
+static struct node {
+       int              node;
+       const char      *map;
+} test_nodes[] = {
+       { .node = 0, .map = "0"     },
+       { .node = 1, .map = "1-2"   },
+       { .node = 3, .map = "5-7,9" },
+};
+
+#define T TEST_ASSERT_VAL
+
+static unsigned long *get_bitmap(const char *str, int nbits)
+{
+       struct cpu_map *map = cpu_map__new(str);
+       unsigned long *bm = NULL;
+       int i;
+
+       bm = bitmap_alloc(nbits);
+
+       if (map && bm) {
+               bitmap_zero(bm, nbits);
+
+               for (i = 0; i < map->nr; i++) {
+                       set_bit(map->map[i], bm);
+               }
+       }
+
+       if (map)
+               cpu_map__put(map);
+       else
+               free(bm);
+
+       return bm && map ? bm : NULL;
+}
+
+int test__mem2node(struct test *t __maybe_unused, int subtest __maybe_unused)
+{
+       struct mem2node map;
+       struct memory_node nodes[3];
+       struct perf_env env = {
+               .memory_nodes    = (struct memory_node *) &nodes[0],
+               .nr_memory_nodes = ARRAY_SIZE(nodes),
+               .memory_bsize    = 0x100,
+       };
+       unsigned int i;
+
+       for (i = 0; i < ARRAY_SIZE(nodes); i++) {
+               nodes[i].node = test_nodes[i].node;
+               nodes[i].size = 10;
+
+               T("failed: alloc bitmap",
+                 (nodes[i].set = get_bitmap(test_nodes[i].map, 10)));
+       }
+
+       T("failed: mem2node__init", !mem2node__init(&map, &env));
+       T("failed: mem2node__node",  0 == mem2node__node(&map,   0x50));
+       T("failed: mem2node__node",  1 == mem2node__node(&map,  0x100));
+       T("failed: mem2node__node",  1 == mem2node__node(&map,  0x250));
+       T("failed: mem2node__node",  3 == mem2node__node(&map,  0x500));
+       T("failed: mem2node__node",  3 == mem2node__node(&map,  0x650));
+       T("failed: mem2node__node", -1 == mem2node__node(&map,  0x450));
+       T("failed: mem2node__node", -1 == mem2node__node(&map, 0x1050));
+
+       mem2node__exit(&map);
+       return 0;
+}
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 2862b80bc288..2e169819e647 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -102,6 +102,7 @@ int test__clang(struct test *test, int subtest);
 const char *test__clang_subtest_get_desc(int subtest);
 int test__clang_subtest_get_nr(void);
 int test__unit_number__scnprint(struct test *test, int subtest);
+int test__mem2node(struct test *t, int subtest);
 
 bool test__bp_signal_is_supported(void);
 
-- 
2.13.6

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