diff options
Diffstat (limited to 'crypto/tcrypt.c')
| -rw-r--r-- | crypto/tcrypt.c | 116 |
1 files changed, 95 insertions, 21 deletions
diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c index 401d25ac214..bd7524cfff3 100644 --- a/crypto/tcrypt.c +++ b/crypto/tcrypt.c @@ -27,6 +27,8 @@ #include <linux/highmem.h> #include <linux/moduleparam.h> #include <linux/jiffies.h> +#include <linux/timex.h> +#include <linux/interrupt.h> #include "tcrypt.h" /* @@ -60,7 +62,7 @@ static unsigned int IDX[8] = { IDX1, IDX2, IDX3, IDX4, IDX5, IDX6, IDX7, IDX8 }; /* * Used by test_cipher_speed() */ -static unsigned int sec = 10; +static unsigned int sec; static int mode; static char *xbuf; @@ -426,6 +428,88 @@ out: crypto_free_tfm(tfm); } +static int test_cipher_jiffies(struct crypto_tfm *tfm, int enc, char *p, + int blen, int sec) +{ + struct scatterlist sg[8]; + unsigned long start, end; + int bcount; + int ret; + + sg[0].page = virt_to_page(p); + sg[0].offset = offset_in_page(p); + sg[0].length = blen; + + for (start = jiffies, end = start + sec * HZ, bcount = 0; + time_before(jiffies, end); bcount++) { + if (enc) + ret = crypto_cipher_encrypt(tfm, sg, sg, blen); + else + ret = crypto_cipher_decrypt(tfm, sg, sg, blen); + + if (ret) + return ret; + } + + printk("%d operations in %d seconds (%ld bytes)\n", + bcount, sec, (long)bcount * blen); + return 0; +} + +static int test_cipher_cycles(struct crypto_tfm *tfm, int enc, char *p, + int blen) +{ + struct scatterlist sg[8]; + unsigned long cycles = 0; + int ret = 0; + int i; + + sg[0].page = virt_to_page(p); + sg[0].offset = offset_in_page(p); + sg[0].length = blen; + + local_bh_disable(); + local_irq_disable(); + + /* Warm-up run. */ + for (i = 0; i < 4; i++) { + if (enc) + ret = crypto_cipher_encrypt(tfm, sg, sg, blen); + else + ret = crypto_cipher_decrypt(tfm, sg, sg, blen); + + if (ret) + goto out; + } + + /* The real thing. */ + for (i = 0; i < 8; i++) { + cycles_t start, end; + + start = get_cycles(); + if (enc) + ret = crypto_cipher_encrypt(tfm, sg, sg, blen); + else + ret = crypto_cipher_decrypt(tfm, sg, sg, blen); + end = get_cycles(); + + if (ret) + goto out; + + cycles += end - start; + } + +out: + local_irq_enable(); + local_bh_enable(); + + if (ret == 0) + printk("1 operation in %lu cycles (%d bytes)\n", + (cycles + 4) / 8, blen); + + return ret; +} + static void test_cipher_speed(char *algo, int mode, int enc, unsigned int sec, struct cipher_testvec *template, unsigned int tcount, struct cipher_speed *speed) @@ -433,8 +517,6 @@ static void test_cipher_speed(char *algo, int mode, int enc, unsigned int sec, unsigned int ret, i, j, iv_len; unsigned char *key, *p, iv[128]; struct crypto_tfm *tfm; - struct scatterlist sg[8]; - unsigned long start, bcount; const char *e, *m; if (enc == ENCRYPT) @@ -492,25 +574,16 @@ static void test_cipher_speed(char *algo, int mode, int enc, unsigned int sec, crypto_cipher_set_iv(tfm, iv, iv_len); } - for (start = jiffies, bcount = 0; - ((jiffies - start) / HZ) < sec; bcount++) { - sg[0].page = virt_to_page(p); - sg[0].offset = offset_in_page(p); - sg[0].length = speed[i].blen; + if (sec) + ret = test_cipher_jiffies(tfm, enc, p, speed[i].blen, + sec); + else + ret = test_cipher_cycles(tfm, enc, p, speed[i].blen); - if (enc) - ret = crypto_cipher_encrypt(tfm, sg, sg, speed[i].blen); - else - ret = crypto_cipher_decrypt(tfm, sg, sg, speed[i].blen); - - if (ret) { - printk("%s () failed flags=%x\n", e, tfm->crt_flags); - goto out; - } + if (ret) { + printk("%s() failed flags=%x\n", e, tfm->crt_flags); + break; } - - printk("%lu operations in %u seconds (%lu bytes)\n", - bcount, sec, bcount * speed[i].blen); } out: @@ -1063,7 +1136,8 @@ module_exit(fini); module_param(mode, int, 0); module_param(sec, uint, 0); -MODULE_PARM_DESC(sec, "Length in seconds of speed tests"); +MODULE_PARM_DESC(sec, "Length in seconds of speed tests " + "(defaults to zero which uses CPU cycles instead)"); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Quick & dirty crypto testing module"); |