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c055e3eae0
linux/crypto
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Ard Biesheuvel c055e3eae0 crypto: xor - use ktime for template benchmarking 
Currently, we use the jiffies counter as a time source, by staring at
it until a HZ period elapses, and then staring at it again and perform
as many XOR operations as we can at the same time until another HZ
period elapses, so that we can calculate the throughput. This takes
longer than necessary, and depends on HZ, which is undesirable, since
HZ is system dependent.

Let's use the ktime interface instead, and use it to time a fixed
number of XOR operations, which can be done much faster, and makes
the time spent depend on the performance level of the system itself,
which is much more reasonable. To ensure that we have the resolution
we need even on systems with 32 kHz time sources, while not spending too
much time in the benchmark on a slow CPU, let's switch to 3 attempts of
800 repetitions each: that way, we will only misidentify algorithms that
perform within 10% of each other as the fastest if they are faster than
10 GB/s to begin with, which is not expected to occur on systems with
such coarse clocks.

On ThunderX2, I get the following results:

Before:

  [72625.956765] xor: measuring software checksum speed
  [72625.993104]    8regs     : 10169.000 MB/sec
  [72626.033099]    32regs    : 12050.000 MB/sec
  [72626.073095]    arm64_neon: 11100.000 MB/sec
  [72626.073097] xor: using function: 32regs (12050.000 MB/sec)

After:

  [72599.650216] xor: measuring software checksum speed
  [72599.651188]    8regs           : 10491 MB/sec
  [72599.652006]    32regs          : 12345 MB/sec
  [72599.652871]    arm64_neon      : 11402 MB/sec
  [72599.652873] xor: using function: 32regs (12345 MB/sec)

Link: https://lore.kernel.org/linux-crypto/20200923182230.22715-3-ardb@kernel.org/
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2020-10-02 18:02:14 +10:00
..
asymmetric_keys X.509: support OSCCA SM2-with-SM3 certificate verification 2020-09-25 17:48:55 +10:00
async_tx treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335 2019-06-05 17:37:06 +02:00
842.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
acompress.c crypto: api - permit users to specify numa node of acomp hardware 2020-07-09 18:25:23 +10:00
adiantum.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
aead.c crypto: algapi - enforce that all instances have a ->free() method 2020-01-09 11:30:58 +08:00
aegis.h crypto: aegis128 - Fix -Wunused-const-variable warning 2019-08-30 18:05:30 +10:00
aegis128-core.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
aegis128-neon-inner.c crypto: aegis128 - duplicate init() and final() hooks in SIMD code 2019-10-26 02:06:05 +11:00
aegis128-neon.c crypto: aegis128 - duplicate init() and final() hooks in SIMD code 2019-10-26 02:06:05 +11:00
aes_generic.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
aes_ti.c crypto: aes - create AES library based on the fixed time AES code 2019-07-26 14:55:33 +10:00
af_alg.c crypto: af_alg - add extra parameters for DRBG interface 2020-09-25 17:48:52 +10:00
ahash.c crypto: ahash - Add init_tfm/exit_tfm 2020-08-28 16:58:28 +10:00
akcipher.c crypto: algapi - enforce that all instances have a ->free() method 2020-01-09 11:30:58 +08:00
algapi.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
algboss.c crypto: algboss - don't wait during notifier callback 2020-06-15 17:38:54 +10:00
algif_aead.c crypto: algif_aead - Do not set MAY_BACKLOG on the async path 2020-08-21 14:45:27 +10:00
algif_hash.c net: make ->{get,set}sockopt in proto_ops optional 2020-07-19 18:16:41 -07:00
algif_rng.c crypto: af_alg - add extra parameters for DRBG interface 2020-09-25 17:48:52 +10:00
algif_skcipher.c crypto: algif_skcipher - EBUSY on aio should be an error 2020-08-21 14:45:26 +10:00
ansi_cprng.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 42 2019-05-24 17:27:12 +02:00
anubis.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
api.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
arc4.c crypto: arc4 - mark ecb(arc4) skcipher as obsolete 2020-09-11 14:39:16 +10:00
authenc.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
authencesn.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
blake2b_generic.c crypto: Replace HTTP links with HTTPS ones 2020-07-23 17:34:20 +10:00
blake2s_generic.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
blowfish_common.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
blowfish_generic.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
camellia_generic.c crypto: Replace HTTP links with HTTPS ones 2020-07-23 17:34:20 +10:00
cast_common.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 44 2019-05-24 17:27:12 +02:00
cast5_generic.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 140 2019-05-30 11:25:16 -07:00
cast6_generic.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
cbc.c crypto: cbc - Remove cbc.h 2020-09-11 14:39:16 +10:00
ccm.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
cfb.c crypto: skcipher - Add skcipher_ialg_simple helper 2019-12-27 18:18:04 +08:00
chacha_generic.c crypto: chacha_generic - remove unnecessary setkey() functions 2019-11-22 18:48:39 +08:00
chacha20poly1305.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
cipher.c crypto: remove propagation of CRYPTO_TFM_RES_* flags 2020-01-09 11:30:53 +08:00
cmac.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
compress.c crypto: compress - remove crt_u.compress (struct compress_tfm) 2019-12-11 16:37:01 +08:00
crc32_generic.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
crc32c_generic.c crypto: crc32c_generic - delete and fix duplicated words 2020-08-21 14:45:25 +10:00
crct10dif_common.c
crct10dif_generic.c crypto: crct10dif_generic - fix duplicated words 2020-08-21 14:45:25 +10:00
cryptd.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
crypto_engine.c crypto: engine - delete duplicated word 2020-08-21 14:45:26 +10:00
crypto_null.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-07-08 20:57:08 -07:00
crypto_user_base.c crypto: algapi - make unregistration functions return void 2019-12-20 14:58:35 +08:00
crypto_user_stat.c crypto: skcipher - remove the "blkcipher" algorithm type 2019-11-01 13:38:32 +08:00
ctr.c crypto: algapi - add NEED_FALLBACK to INHERITED_FLAGS 2020-07-16 21:49:08 +10:00
cts.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
curve25519-generic.c crypto: curve25519 - implement generic KPP driver 2019-11-17 09:02:43 +08:00
deflate.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
des_generic.c crypto: remove CRYPTO_TFM_RES_WEAK_KEY 2020-01-09 11:30:53 +08:00
dh_helper.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
dh.c crypto: dh - SP800-56A rev 3 local public key validation 2020-07-31 18:08:59 +10:00
drbg.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
ecb.c crypto: skcipher - Add skcipher_ialg_simple helper 2019-12-27 18:18:04 +08:00
ecc_curve_defs.h crypto: ecc - make ecc into separate module 2019-04-18 22:15:02 +08:00
ecc.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
ecc.h crypto: ecc - SP800-56A rev 3 local public key validation 2020-07-31 18:08:59 +10:00
ecdh_helper.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ecdh.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
echainiv.c crypto: geniv - remove unneeded arguments from aead_geniv_alloc() 2020-07-16 21:49:07 +10:00
ecrdsa_defs.h crypto: ecrdsa - add EC-RDSA (GOST 34.10) algorithm 2019-04-18 22:15:02 +08:00
ecrdsa_params.asn1 crypto: ecrdsa - add EC-RDSA (GOST 34.10) algorithm 2019-04-18 22:15:02 +08:00
ecrdsa_pub_key.asn1 crypto: ecrdsa - add EC-RDSA (GOST 34.10) algorithm 2019-04-18 22:15:02 +08:00
ecrdsa.c crypto: algapi - Remove skbuff.h inclusion 2020-08-20 14:04:28 +10:00
essiv.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
fcrypt.c crypto: make all generic algorithms set cra_driver_name 2019-06-13 14:31:39 +08:00
fips.c crypto: fips - add FIPS test failure notification chain 2019-07-26 14:51:57 +10:00
gcm.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
geniv.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
gf128mul.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
ghash-generic.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
hash_info.c crypto: rename sm3-256 to sm3 in hash_algo_name 2020-02-18 07:35:49 -05:00
hmac.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
internal.h crypto: algapi - Move crypto_yield into internal.h 2020-08-19 21:59:43 +10:00
jitterentropy-kcapi.c crypto: algapi - Remove skbuff.h inclusion 2020-08-20 14:04:28 +10:00
jitterentropy.c crypto: Replace HTTP links with HTTPS ones 2020-07-23 17:34:20 +10:00
jitterentropy.h crypto: jitter - add header to fix buildwarnings 2019-10-18 18:49:40 +11:00
Kconfig crypto: sm2 - introduce OSCCA SM2 asymmetric cipher algorithm 2020-09-25 17:48:54 +10:00
keywrap.c crypto: skcipher - Add skcipher_ialg_simple helper 2019-12-27 18:18:04 +08:00
khazad.c crypto: make all generic algorithms set cra_driver_name 2019-06-13 14:31:39 +08:00
kpp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
lrw.c crypto: Replace HTTP links with HTTPS ones 2020-07-23 17:34:20 +10:00
lz4.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-07-08 20:57:08 -07:00
lz4hc.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-07-08 20:57:08 -07:00
lzo-rle.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-07-08 20:57:08 -07:00
lzo.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-07-08 20:57:08 -07:00
Makefile crypto: sm2 - introduce OSCCA SM2 asymmetric cipher algorithm 2020-09-25 17:48:54 +10:00
md4.c crypto: make all generic algorithms set cra_driver_name 2019-06-13 14:31:39 +08:00
md5.c crypto: md5 - remove unused macros 2020-02-28 08:43:21 +08:00
memneq.c
michael_mic.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
nhpoly1305.c crypto: poly1305 - add new 32 and 64-bit generic versions 2020-01-16 15:18:12 +08:00
ofb.c crypto: skcipher - Add skcipher_ialg_simple helper 2019-12-27 18:18:04 +08:00
pcbc.c crypto: skcipher - Add skcipher_ialg_simple helper 2019-12-27 18:18:04 +08:00
pcrypt.c padata: fold padata_alloc_possible() into padata_alloc() 2020-07-23 17:34:18 +10:00
poly1305_generic.c crypto: poly1305 - add new 32 and 64-bit generic versions 2020-01-16 15:18:12 +08:00
proc.c crypto: proc - Removing some useless only space lines 2020-09-25 17:48:15 +10:00
ripemd.h
rmd128.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-07-08 20:57:08 -07:00
rmd160.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-07-08 20:57:08 -07:00
rmd256.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-07-08 20:57:08 -07:00
rmd320.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-07-08 20:57:08 -07:00
rng.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
rsa_helper.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
rsa-pkcs1pad.c crypto: algapi - Remove skbuff.h inclusion 2020-08-20 14:04:28 +10:00
rsa.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
rsaprivkey.asn1
rsapubkey.asn1
salsa20_generic.c crypto: Replace HTTP links with HTTPS ones 2020-07-23 17:34:20 +10:00
scatterwalk.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
scompress.c crypto: algapi - make unregistration functions return void 2019-12-20 14:58:35 +08:00
seed.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
seqiv.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
serpent_generic.c crypto: x86 - Regularize glue function prototypes 2019-12-11 16:36:54 +08:00
sha1_generic.c crypto: lib/sha1 - fold linux/cryptohash.h into crypto/sha.h 2020-05-08 15:32:17 +10:00
sha3_generic.c crypto: Replace HTTP links with HTTPS ones 2020-07-23 17:34:20 +10:00
sha256_generic.c crypto: lib/sha256 - return void 2020-05-08 15:32:12 +10:00
sha512_generic.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 45 2019-05-24 17:27:12 +02:00
shash.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
simd.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
skcipher.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
sm2.c crypto: sm2 - introduce OSCCA SM2 asymmetric cipher algorithm 2020-09-25 17:48:54 +10:00
sm2signature.asn1 crypto: sm2 - introduce OSCCA SM2 asymmetric cipher algorithm 2020-09-25 17:48:54 +10:00
sm3_generic.c crypto: sm3 - export crypto_sm3_final function 2020-09-25 17:48:53 +10:00
sm4_generic.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
streebog_generic.c crypto: streebog - remove two unused variables 2019-08-15 21:52:14 +10:00
tcrypt.c crypto: tcrypt - Add support for hash speed testing with keys 2020-08-21 14:45:27 +10:00
tcrypt.h crypto: tcrypt - Add support for hash speed testing with keys 2020-08-21 14:45:27 +10:00
tea.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-07-08 20:57:08 -07:00
testmgr.c crypto: sm2 - add SM2 test vectors to testmgr 2020-09-25 17:48:54 +10:00
testmgr.h crypto: sm2 - add SM2 test vectors to testmgr 2020-09-25 17:48:54 +10:00
tgr192.c crypto: tgr192 - remove unneeded semicolon 2019-11-15 13:44:17 +08:00
twofish_common.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
twofish_generic.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
vmac.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
wp512.c crypto: make all generic algorithms set cra_driver_name 2019-06-13 14:31:39 +08:00
xcbc.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
xor.c crypto: xor - use ktime for template benchmarking 2020-10-02 18:02:14 +10:00
xts.c crypto: xts - Replace memcpy() invocation with simple assignment 2020-07-31 18:09:00 +10:00
xxhash_generic.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
zstd.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00