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authorGilad Ben-Yossef <gilad@benyossef.com>2017-12-17 08:29:00 +0000
committerHerbert Xu <herbert@gondor.apana.org.au>2017-12-28 17:56:39 +1100
commit7c3f13238992884abf3782dcc8e97e0862e5c23e (patch)
treeb81b21d7d9a3687cdbbf04b5a337c11a81bd6215 /crypto
parent0e4b52942b1c76f89e0dcb829f72e123d0678f54 (diff)
downloadlinux-next-7c3f13238992884abf3782dcc8e97e0862e5c23e.tar.gz
crypto: tcrypt - use multi buf for ahash mb test
The multi buffer ahash speed test was allocating multiple buffers for use with the multiple outstanding requests it was starting but never actually using them (except to free them), instead using a different single statically allocated buffer for all requests. Fix this by actually using the allocated buffers for the test. It is noted that it may seem tempting to instead remove the allocation and free of the multiple buffers and leave things as they are since this is a hash test where the input is read only. However, after consideration I believe that multiple buffers better reflect real life scenario with regard to data cache and TLB behaviours etc. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/tcrypt.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index 28b4882f1944..a0c4e0dbffa4 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -385,7 +385,7 @@ static inline int do_one_ahash_op(struct ahash_request *req, int ret)
}
struct test_mb_ahash_data {
- struct scatterlist sg[TVMEMSIZE];
+ struct scatterlist sg[XBUFSIZE];
char result[64];
struct ahash_request *req;
struct crypto_wait wait;
@@ -428,7 +428,12 @@ static void test_mb_ahash_speed(const char *algo, unsigned int sec,
ahash_request_set_callback(data[i].req, 0, crypto_req_done,
&data[i].wait);
- test_hash_sg_init(data[i].sg);
+
+ sg_init_table(data[i].sg, XBUFSIZE);
+ for (j = 0; j < XBUFSIZE; j++) {
+ sg_set_buf(data[i].sg + j, data[i].xbuf[j], PAGE_SIZE);
+ memset(data[i].xbuf[j], 0xff, PAGE_SIZE);
+ }
}
pr_info("\ntesting speed of multibuffer %s (%s)\n", algo,
@@ -439,9 +444,9 @@ static void test_mb_ahash_speed(const char *algo, unsigned int sec,
if (speed[i].blen != speed[i].plen)
continue;
- if (speed[i].blen > TVMEMSIZE * PAGE_SIZE) {
+ if (speed[i].blen > XBUFSIZE * PAGE_SIZE) {
pr_err("template (%u) too big for tvmem (%lu)\n",
- speed[i].blen, TVMEMSIZE * PAGE_SIZE);
+ speed[i].blen, XBUFSIZE * PAGE_SIZE);
goto out;
}