[PATCH 16/17] lib: bitmap: add performance test for bitmap_print_to_pagebuf

Yury Norov
2021-08-14T21:20:35Z

Functional tests for bitmap_print_to_pagebuf() are provided
in lib/test_printf.c. This patch adds performance test for
a case of fully set bitmap.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
lib/test_bitmap.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)

diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 4ea73f5aed41..452d525007da 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -430,6 +430,42 @@ static void __init test_bitmap_parselist(void)
}
}

+static void __init test_bitmap_printlist(void)
+{
+ unsigned long *bmap = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ char expected[256];
+ int ret, slen;
+ ktime_t time;
+
+ if (!buf || !bmap)
+ goto out;
+
+ memset(bmap, -1, PAGE_SIZE);
+ slen = snprintf(expected, 256, "0-%ld", PAGE_SIZE * 8 - 1);
+ if (slen < 0)
+ goto out;
+
+ time = ktime_get();
+ ret = bitmap_print_to_pagebuf(true, buf, bmap, PAGE_SIZE * 8);
+ time = ktime_get() - time;
+
+ if (ret != slen + 1) {
+ pr_err("bitmap_print_to_pagebuf: result is %d, expected %d\n", ret, slen);
+ goto out;
+ }
+
+ if (strncmp(buf, expected, slen)) {
+ pr_err("bitmap_print_to_pagebuf: result is %s, expected %s\n", buf, expected);
+ goto out;
+ }
+
+ pr_err("bitmap_print_to_pagebuf: input is '%s', Time: %llu\n", buf, time);
+out:
+ kfree(buf);
+ kfree(bmap);
+}
+
static const unsigned long parse_test[] __initconst = {
BITMAP_FROM_U64(0),
BITMAP_FROM_U64(1),
@@ -669,6 +705,7 @@ static void __init selftest(void)
test_bitmap_arr32();
test_bitmap_parse();
test_bitmap_parselist();
+ test_bitmap_printlist();
test_mem_optimisations();
test_for_each_set_clump8();
test_bitmap_cut();
--
2.30.2