1 files changed, 37 insertions, 0 deletions

diff --git a/tools/perf/tests/unit_number__scnprintf.c b/tools/perf/tests/unit_number__scnprintf.c
new file mode 100644
index 000000000000..623c2aa53c4a
--- /dev/null
+++ b/tools/perf/tests/unit_number__scnprintf.c
@@ -0,0 +1,37 @@
+#include <linux/compiler.h>
+#include <linux/types.h>
+#include "tests.h"
+#include "util.h"
+#include "debug.h"
+
+int test__unit_number__scnprint(int subtest __maybe_unused)
+{
+        struct {
+                u64              n;
+                const char      *str;
+        } test[] = {
+                { 1,                    "1B"    },
+                { 10*1024,              "10K"   },
+                { 20*1024*1024,         "20M"   },
+                { 30*1024*1024*1024ULL, "30G"   },
+                { 0,                    "0B"    },
+                { 0,                    NULL    },
+        };
+        unsigned i = 0;
+
+        while (test[i].str) {
+                char buf[100];
+
+                unit_number__scnprintf(buf, sizeof(buf), test[i].n);
+
+                pr_debug("n %" PRIu64 ", str '%s', buf '%s'\n",
+                         test[i].n, test[i].str, buf);
+
+                if (strcmp(test[i].str, buf))
+                        return TEST_FAIL;
+
+                i++;
+        }
+
+        return TEST_OK;
+}