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Date: Sat, 18 Jan 2014 00:46:27 +0000
From: Tadeusz Struk <tadeusz.struk@...el.com>
To: herbert@...dor.apana.org.au
Cc: linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
davem@...emloft.net, tadeusz.struk@...el.com
Subject: [PATCH RFC 2/2] crypto: Simple load balancer test module
Test module for the simple algorithm load balancer
Signed-off-by: Tadeusz Struk <tadeusz.struk@...el.com>
---
crypto/Kconfig | 6 ++
crypto/Makefile | 1 +
crypto/test_alg_loadbalance.c | 231 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 247 insertions(+)
create mode 100644 crypto/test_alg_loadbalance.c
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 7bcb70d..85e1bc2 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1404,6 +1404,12 @@ config CRYPTO_USER_API_SKCIPHER
config CRYPTO_HASH_INFO
bool
+config CRYPTO_ALG_LOAD_BALANCE_TEST
+ tristate "Crypto Algorithm load balancer test module"
+ default n
+ help
+ This option enables the crypto algorithm load balancer test module.
+
source "drivers/crypto/Kconfig"
source crypto/asymmetric_keys/Kconfig
diff --git a/crypto/Makefile b/crypto/Makefile
index b29402a..5a49e2a 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -97,6 +97,7 @@ obj-$(CONFIG_CRYPTO_GHASH) += ghash-generic.o
obj-$(CONFIG_CRYPTO_USER_API) += af_alg.o
obj-$(CONFIG_CRYPTO_USER_API_HASH) += algif_hash.o
obj-$(CONFIG_CRYPTO_USER_API_SKCIPHER) += algif_skcipher.o
+obj-$(CONFIG_CRYPTO_ALG_LOAD_BALANCE_TEST) += test_alg_loadbalance.o
#
# generic algorithms and the async_tx api
diff --git a/crypto/test_alg_loadbalance.c b/crypto/test_alg_loadbalance.c
new file mode 100644
index 0000000..2637247
--- /dev/null
+++ b/crypto/test_alg_loadbalance.c
@@ -0,0 +1,231 @@
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/crypto.h>
+#include <linux/string.h>
+#include <crypto/algapi.h>
+
+static int encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ return 0;
+}
+static int setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
+{
+ return 0;
+}
+
+
+#define loops 3000000
+static struct crypto_ablkcipher *tfms[loops];
+
+static struct crypto_alg tmp = {
+ .cra_name = "test",
+ .cra_driver_name = "test_driver",
+ .cra_priority = 1,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER,
+ .cra_module = THIS_MODULE,
+ .cra_ctxsize = 0,
+ .cra_type = &crypto_blkcipher_type,
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = 64,
+ .max_keysize = 64,
+ .ivsize = 64,
+ .setkey = setkey,
+ .encrypt = encrypt,
+ .decrypt = encrypt,
+ },
+ },
+ };
+static struct crypto_alg algs[10] = {
+ { { 0 } },
+ { { 0 } },
+ { { 0 } },
+ { { 0 } },
+ { { 0 } },
+ { { 0 } },
+ { { 0 } },
+ { { 0 } },
+ { { 0 } },
+ { { 0 } },
+};
+
+static int __init cra_lbtest_init(void)
+{
+ int i;
+
+ for (i = 0; i < 10; i++) {
+ algs[i] = tmp;
+ algs[i].cra_priority += i;
+ }
+
+ if (crypto_register_algs(algs, 10))
+ return -1;
+
+ for (i = 0; i < loops; i++) {
+ tfms[i] = crypto_alloc_ablkcipher("test", 0, 0);
+ if (IS_ERR(tfms[i]))
+ return PTR_ERR(tfms[i]);
+ }
+ pr_info("Algorithm load balancig test results for %d allocatoins\n",
+ loops);
+ pr_info("All different alg priorities:\n");
+ for (i = 0; i < 10; i++) {
+ unsigned long times = atomic_read(&algs[i].cra_refcnt);
+ unsigned long percent = (times * 100) / loops;
+
+ pr_info("Alg with cra_pri %d allocated %lu times. That's ~%lu%%\n",
+ algs[i].cra_priority, times, percent);
+
+ }
+ for (i = 0; i < loops; i++)
+ crypto_free_ablkcipher(tfms[i]);
+
+ crypto_unregister_algs(algs, 10);
+
+ for (i = 0; i < 10; i++) {
+ algs[i] = tmp;
+ algs[i].cra_priority = 10;
+ }
+ if (crypto_register_algs(algs, 10))
+ return -1;
+
+ for (i = 0; i < loops; i++) {
+ tfms[i] = crypto_alloc_ablkcipher("test", 0, 0);
+ if (IS_ERR(tfms[i]))
+ return PTR_ERR(tfms[i]);
+ }
+ pr_info("All same alg priorities:\n");
+ for (i = 0; i < 10; i++) {
+ unsigned long times = atomic_read(&algs[i].cra_refcnt);
+ unsigned long percent = (times * 100) / loops;
+
+ pr_info("Alg with cra_pri %d allocated %lu times. That's ~%lu%%\n",
+ algs[i].cra_priority, times, percent);
+ }
+ for (i = 0; i < loops; i++)
+ crypto_free_ablkcipher(tfms[i]);
+
+ crypto_unregister_algs(algs, 10);
+
+ for (i = 0; i < 10; i++)
+ algs[i] = tmp;
+
+ algs[0].cra_priority = 9;
+ algs[1].cra_priority = 4;
+ algs[2].cra_priority = 1;
+ algs[3].cra_priority = 4;
+ algs[4].cra_priority = 5;
+ algs[5].cra_priority = 20;
+ algs[6].cra_priority = 21;
+ algs[7].cra_priority = 10;
+ algs[8].cra_priority = 21;
+ algs[9].cra_priority = 7;
+
+ if (crypto_register_algs(algs, 10))
+ return -1;
+
+ for (i = 0; i < loops; i++) {
+ tfms[i] = crypto_alloc_ablkcipher("test", 0, 0);
+ if (IS_ERR(tfms[i]))
+ return PTR_ERR(tfms[i]);
+ }
+ pr_info("A mix alg priorities:\n");
+ for (i = 0; i < 10; i++) {
+ unsigned long times = atomic_read(&algs[i].cra_refcnt);
+ unsigned long percent = (times * 100) / loops;
+
+ pr_info("Alg with cra_pri %d allocated %lu times. That's ~%lu%%\n",
+ algs[i].cra_priority, times, percent);
+ }
+ for (i = 0; i < loops; i++)
+ crypto_free_ablkcipher(tfms[i]);
+ crypto_unregister_algs(algs, 10);
+
+ for (i = 0; i < 10; i++)
+ algs[i] = tmp;
+
+ algs[0].cra_priority = 9;
+ algs[1].cra_priority = 4;
+ algs[2].cra_priority = 1;
+ algs[3].cra_priority = 4;
+ algs[4].cra_priority = 500;
+ algs[5].cra_priority = 20;
+ algs[6].cra_priority = 21;
+ algs[7].cra_priority = 10;
+ algs[8].cra_priority = 21;
+ algs[9].cra_priority = 7;
+
+ if (crypto_register_algs(algs, 10))
+ return -1;
+
+ for (i = 0; i < loops; i++) {
+ tfms[i] = crypto_alloc_ablkcipher("test", 0, 0);
+ if (IS_ERR(tfms[i]))
+ return PTR_ERR(tfms[i]);
+ }
+ pr_info("A mix alg priorities with one very big:\n");
+ for (i = 0; i < 10; i++) {
+ unsigned long times = atomic_read(&algs[i].cra_refcnt);
+ unsigned long percent = (times * 100) / loops;
+
+ pr_info("Alg with cra_pri %d allocated %lu times. That's ~%lu%%\n",
+ algs[i].cra_priority, times, percent);
+ }
+
+ for (i = 0; i < loops; i++)
+ crypto_free_ablkcipher(tfms[i]);
+
+ crypto_unregister_algs(algs, 10);
+
+ pr_info("And lastly only one of a given alg:\n");
+ strcpy(tmp.cra_name, "TEST");
+
+ for (i = 0; i < 10; i++)
+ algs[i] = tmp;
+
+ strcpy(algs[0].cra_name, "test");
+
+ if (crypto_register_algs(algs, 10))
+ return -1;
+
+ for (i = 0; i < loops; i++) {
+ tfms[i] = crypto_alloc_ablkcipher("test", 0, 0);
+ if (IS_ERR(tfms[i]))
+ return PTR_ERR(tfms[i]);
+ }
+
+ for (i = 0; i < 10; i++) {
+
+ unsigned long times = atomic_read(&algs[i].cra_refcnt);
+ unsigned long percent = (times * 100) / loops;
+
+ pr_info("Alg with cra_pri %d allocated %lu times. That's ~%lu%%\n",
+ algs[i].cra_priority, times, percent);
+ }
+
+ for (i = 0; i < loops; i++)
+ crypto_free_ablkcipher(tfms[i]);
+
+ crypto_unregister_algs(algs, 10);
+ return 0;
+
+}
+
+static void __exit cra_lbtest_exit(void)
+{
+ crypto_unregister_algs(algs, 10);
+}
+
+module_init(cra_lbtest_init);
+module_exit(cra_lbtest_exit);
+MODULE_DESCRIPTION("Crypto Algorithm load balancer test module");
+MODULE_LICENSE("GPL");
--
1.7.10.4
--
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