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Message-ID: <20250901201815.594177-4-ebiggers@kernel.org>
Date: Mon, 1 Sep 2025 13:18:12 -0700
From: Eric Biggers <ebiggers@...nel.org>
To: linux-crypto@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
Ard Biesheuvel <ardb@...nel.org>,
"Jason A . Donenfeld" <Jason@...c4.com>,
Zhiqi Song <songzhiqi1@...wei.com>,
Longfang Liu <liulongfang@...wei.com>,
x86@...nel.org,
linux-arm-kernel@...ts.infradead.org,
linuxppc-dev@...ts.ozlabs.org,
Eric Biggers <ebiggers@...nel.org>
Subject: [PATCH 3/6] lib/crypto: tests: Add Curve25519 benchmark
Add a benchmark to curve25519_kunit. This brings it in line with the
other crypto KUnit tests and provides an easy way to measure
performance.
Signed-off-by: Eric Biggers <ebiggers@...nel.org>
---
lib/crypto/tests/curve25519_kunit.c | 31 +++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/lib/crypto/tests/curve25519_kunit.c b/lib/crypto/tests/curve25519_kunit.c
index 585f7ad3ed5f7..2e1d781563648 100644
--- a/lib/crypto/tests/curve25519_kunit.c
+++ b/lib/crypto/tests/curve25519_kunit.c
@@ -3,10 +3,11 @@
* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@...c4.com>. All Rights Reserved.
*/
#include <crypto/curve25519.h>
#include <kunit/test.h>
+#include <linux/timekeeping.h>
struct curve25519_test_vector {
u8 private[CURVE25519_KEY_SIZE];
u8 public[CURVE25519_KEY_SIZE];
u8 result[CURVE25519_KEY_SIZE];
@@ -1317,13 +1318,43 @@ static void test_curve25519_basepoint(struct kunit *test)
KUNIT_EXPECT_MEMEQ_MSG(test, out, out2, CURVE25519_KEY_SIZE,
"in=%*phN", CURVE25519_KEY_SIZE, in);
}
}
+static void benchmark_curve25519(struct kunit *test)
+{
+ const u8 *private = curve25519_test_vectors[0].private;
+ const u8 *public = curve25519_test_vectors[0].public;
+ u8 out[CURVE25519_KEY_SIZE];
+ const size_t warmup_niter = 5000;
+ const size_t benchmark_niter = 1024;
+ bool ok = true;
+ u64 t;
+
+ if (!IS_ENABLED(CONFIG_CRYPTO_LIB_BENCHMARK))
+ kunit_skip(test, "not enabled");
+
+ /* Warm-up */
+ for (size_t i = 0; i < warmup_niter; i++)
+ ok &= curve25519(out, private, public);
+
+ /* Benchmark */
+ preempt_disable();
+ t = ktime_get_ns();
+ for (size_t i = 0; i < benchmark_niter; i++)
+ ok &= curve25519(out, private, public);
+ t = ktime_get_ns() - t;
+ preempt_enable();
+ KUNIT_EXPECT_TRUE(test, ok);
+ kunit_info(test, "%llu ops/s",
+ div64_u64((u64)benchmark_niter * 1000000000, t ?: 1));
+}
+
static struct kunit_case curve25519_test_cases[] = {
KUNIT_CASE(test_curve25519),
KUNIT_CASE(test_curve25519_basepoint),
+ KUNIT_CASE(benchmark_curve25519),
{},
};
static struct kunit_suite curve25519_test_suite = {
.name = "curve25519",
--
2.50.1
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