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From: Yury Norov <yury.norov@gmail.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	linux-mmc@vger.kernel.org
Cc: Yury Norov <yury.norov@gmail.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Rasmus Villemoes <linux@rasmusvillemoes.dk>,
	Petr Mladek <pmladek@suse.com>,
	Sergey Senozhatsky <senozhatsky@chromium.org>,
	Tejun Heo <tj@kernel.org>, Steven Rostedt <rostedt@goodmis.org>,
	Wolfram Sang <wsa+renesas@sang-engineering.com>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	Dennis Zhou <dennis@kernel.org>, Christoph Lameter <cl@linux.com>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH 3/4] lib: bitmap: add performance test for bitmap_print_to_pagebuf
Date: Sun, 18 Jul 2021 19:17:54 -0700	[thread overview]
Message-ID: <20210719021755.883182-4-yury.norov@gmail.com> (raw)
In-Reply-To: <20210719021755.883182-1-yury.norov@gmail.com>

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>
---
 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


  parent reply	other threads:[~2021-07-19  2:18 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-19  2:17 [PATCH v2 0/4] bitmap: unify for_each_bit() macros Yury Norov
2021-07-19  2:17 ` [PATCH 1/4] mm/percpu: micro-optimize pcpu_is_populated() Yury Norov
2021-07-21 21:07   ` Dennis Zhou
2021-07-19  2:17 ` [PATCH 2/4] bitmap: unify find_bit operations Yury Norov
2021-07-21 21:12   ` Dennis Zhou
2021-08-04 10:07   ` Ulf Hansson
2021-08-11  7:38   ` Wolfram Sang
2021-08-12  1:23     ` Yury Norov
2021-07-19  2:17 ` Yury Norov [this message]
2021-07-19  2:17 ` [PATCH 4/4] vsprintf: rework bitmap_list_string Yury Norov

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