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Helge Deller e55fcc821d crypto: xor - fix template benchmarking 
[ Upstream commit ab9a244c396aae4aaa34b2399b82fc15ec2df8c1 ]

Commit c055e3eae0 ("crypto: xor - use ktime for template benchmarking")
switched from using jiffies to ktime-based performance benchmarking.

This works nicely on machines which have a fine-grained ktime()
clocksource as e.g. x86 machines with TSC.
But other machines, e.g. my 4-way HP PARISC server, don't have such
fine-grained clocksources, which is why it seems that 800 xor loops
take zero seconds, which then shows up in the logs as:

 xor: measuring software checksum speed
    8regs           : -1018167296 MB/sec
    8regs_prefetch  : -1018167296 MB/sec
    32regs          : -1018167296 MB/sec
    32regs_prefetch : -1018167296 MB/sec

Fix this with some small modifications to the existing code to improve
the algorithm to always produce correct results without introducing
major delays for architectures with a fine-grained ktime()
clocksource:
a) Delay start of the timing until ktime() just advanced. On machines
with a fast ktime() this should be just one additional ktime() call.
b) Count the number of loops. Run at minimum 800 loops and finish
earliest when the ktime() counter has progressed.

With that the throughput can now be calculated more accurately under all
conditions.

Fixes: c055e3eae0 ("crypto: xor - use ktime for template benchmarking")
Signed-off-by: Helge Deller <deller@gmx.de>
Tested-by: John David Anglin <dave.anglin@bell.net>

v2:
- clean up coding style (noticed & suggested by Herbert Xu)
- rephrased & fixed typo in commit message

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2024-10-04 16:28:49 +02:00
..
asymmetric_keys KEYS: asymmetric: Add missing dependencies of FIPS_SIGNATURE_SELFTEST 2024-06-12 11:11:22 +02:00
async_tx async_tx: fix kernel-doc notation warnings 2023-03-24 18:22:28 +08:00
842.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
Kconfig crypto: jitter - fix CRYPTO_JITTERENTROPY help text 2024-03-26 18:19:52 -04:00
Makefile crypto: sig - Add interface for sign/verify 2023-06-23 16:15:36 +08:00
acompress.c crypto: api - Fix CRYPTO_USER checks for report function 2023-05-02 18:22:24 +08:00
adiantum.c crypto: api - Use data directly in completion function 2023-02-13 18:35:14 +08:00
aead.c crypto: aead,cipher - zeroize key buffer after use 2024-07-11 12:49:04 +02:00
aegis-neon.h crypto: aegis128-neon - add header for internal prototypes 2023-05-24 18:12:33 +08:00
aegis.h crypto: aegis128 - Move simd prototypes into aegis.h 2021-03-19 21:59:45 +11:00
aegis128-core.c crypto: aegis128 - Move simd prototypes into aegis.h 2021-03-19 21:59:45 +11:00
aegis128-neon-inner.c crypto: aegis128-neon - add header for internal prototypes 2023-05-24 18:12:33 +08:00
aegis128-neon.c crypto: aegis128-neon - add header for internal prototypes 2023-05-24 18:12:33 +08:00
aes_generic.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
aes_ti.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
af_alg.c crypto: af_alg - Disallow multiple in-flight AIO requests 2024-01-25 15:35:16 -08:00
ahash.c crypto: hash - Make crypto_ahash_alg helper available 2023-05-12 18:48:01 +08:00
akcipher.c crypto: akcipher - Do not copy dst if it is NULL 2023-06-27 17:59:52 +08:00
algapi.c crypto: api - Disallow identical driver names 2024-01-31 16:18:49 -08:00
algboss.c crypto: algboss - compile out test-related code when tests disabled 2022-11-25 17:39:18 +08:00
algif_aead.c sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
algif_hash.c crypto: algif_hash - Remove bogus SGL free on zero-length error path 2024-02-23 09:25:11 +01:00
algif_rng.c sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
algif_skcipher.c sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
ansi_cprng.c crypto: remove cipher routines from public crypto API 2021-01-03 08:41:35 +11:00
anubis.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
api.c crypto: api - Add __crypto_alloc_tfmgfp 2023-06-23 16:15:36 +08:00
arc4.c crypto: arc4 - mark ecb(arc4) skcipher as obsolete 2020-09-11 14:39:16 +10:00
aria_generic.c crypto: x86/aria - do not use magic number offsets of aria_ctx 2023-01-06 17:15:47 +08:00
authenc.c crypto: api - Use data directly in completion function 2023-02-13 18:35:14 +08:00
authencesn.c crypto: api - Use data directly in completion function 2023-02-13 18:35:14 +08:00
blake2b_generic.c crypto: blake2b - update file comment 2021-01-03 08:41:39 +11:00
blowfish_common.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
blowfish_generic.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
camellia_generic.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
cast5_generic.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
cast6_generic.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
cast_common.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 44 2019-05-24 17:27:12 +02:00
cbc.c crypto: remove cipher routines from public crypto API 2021-01-03 08:41:35 +11:00
ccm.c crypto: api - Use data directly in completion function 2023-02-13 18:35:14 +08:00
cfb.c crypto: cleanup comments 2022-03-03 10:49:20 +12:00
chacha20poly1305.c crypto: api - Use data directly in completion function 2023-02-13 18:35:14 +08:00
chacha_generic.c crypto: chacha_generic - remove unnecessary setkey() functions 2019-11-22 18:48:39 +08:00
cipher.c crypto: aead,cipher - zeroize key buffer after use 2024-07-11 12:49:04 +02:00
cmac.c crypto: cmac - Add support for cloning 2023-05-24 18:12:33 +08:00
compress.c crypto: compress - remove crt_u.compress (struct compress_tfm) 2019-12-11 16:37:01 +08:00
compress.h crypto: acomp - Count error stats differently 2023-03-14 17:06:42 +08:00
crc32_generic.c crypto: crc32-generic - Use SPDX-License-Identifier 2021-04-16 21:24:27 +10:00
crc32c_generic.c crypto: crc32c_generic - delete and fix duplicated words 2020-08-21 14:45:25 +10:00
crc64_rocksoft_generic.c crypto: add rocksoft 64b crc guard tag framework 2022-03-07 12:48:35 -07:00
crct10dif_common.c
…
crct10dif_generic.c crypto: crct10dif_generic - fix duplicated words 2020-08-21 14:45:25 +10:00
cryptd.c crypto: cryptd - Add support for cloning hashes 2023-04-20 18:20:04 +08:00
crypto_engine.c crypto: engine - Remove crypto_engine_ctx 2023-08-18 17:01:11 +08:00
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: rng - Count error stats differently 2023-03-14 17:06:42 +08:00
ctr.c crypto: remove cipher routines from public crypto API 2021-01-03 08:41:35 +11:00
cts.c crypto: api - Use data directly in completion function 2023-02-13 18:35:14 +08:00
curve25519-generic.c crypto: add __init/__exit annotations to init/exit funcs 2022-09-24 16:14:43 +08:00
deflate.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
des_generic.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
dh.c crypto: api - Use data directly in completion function 2023-02-13 18:35:14 +08:00
dh_helper.c crypto: dh - split out deserialization code from crypto_dh_decode() 2022-03-03 10:47:50 +12:00
drbg.c crypto: drbg - Only fail when jent is unavailable in FIPS mode 2023-04-06 16:18:53 +08:00
ecb.c crypto: remove cipher routines from public crypto API 2021-01-03 08:41:35 +11:00
ecc.c crypto: ecc - Silence sparse warning 2023-02-14 13:39:33 +08:00
ecc_curve_defs.h Merge branch 'ecc' 2021-03-26 19:55:55 +11:00
ecdh.c crypto: ecdh - explicitly zeroize private_key 2024-07-05 09:33:52 +02:00
ecdh_helper.c crypto: ecdh - move curve_id of ECDH from the key to algorithm name 2021-03-13 00:04:03 +11:00
ecdsa.c crypto: ecdsa - Fix module auto-load on add-key 2024-06-16 13:47:39 +02:00
ecdsasignature.asn1 crypto: ecdsa - Add support for ECDSA signature verification 2021-03-26 19:41:58 +11:00
echainiv.c crypto: geniv - remove unneeded arguments from aead_geniv_alloc() 2020-07-16 21:49:07 +10:00
ecrdsa.c crypto: ecrdsa - Fix module auto-load on add_key 2024-06-16 13:47:39 +02:00
ecrdsa_defs.h crypto: ecc - Move ecc.h to include/crypto/internal 2021-10-29 21:04:03 +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
essiv.c crypto: api - Use data directly in completion function 2023-02-13 18:35:14 +08:00
fcrypt.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
fips.c crypto: fips - simplify one-level sysctl registration for crypto_sysctl_table 2023-03-17 11:16:44 +08:00
gcm.c crypto: api - Use data directly in completion function 2023-02-13 18:35:14 +08:00
geniv.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
ghash-generic.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
hash.h crypto: hash - Add crypto_clone_ahash/shash 2023-04-20 18:20:04 +08:00
hash_info.c crypto: rename sm3-256 to sm3 in hash_algo_name 2020-02-18 07:35:49 -05:00
hctr2.c crypto: api - Use data directly in completion function 2023-02-13 18:35:14 +08:00
hmac.c crypto: hmac - Add missing blank line 2023-06-16 20:30:35 +08:00
internal.h crypto: sig - Fix verify call 2023-06-27 15:40:24 +08:00
jitterentropy-kcapi.c crypto: jitter - add interface for gathering of raw entropy 2023-05-12 18:48:01 +08:00
jitterentropy-testing.c crypto: jitter - add interface for gathering of raw entropy 2023-05-12 18:48:01 +08:00
jitterentropy.c crypto: jitter - Add clarifying comments to Jitter Entropy RCT cutoff values 2023-08-11 19:19:52 +08:00
jitterentropy.h crypto: jitter - add interface for gathering of raw entropy 2023-05-12 18:48:01 +08:00
kdf_sp800108.c crypto: kdf - silence noisy self-test 2022-11-25 17:39:18 +08:00
keywrap.c crypto: keywrap - Remove else after break statement 2021-04-02 18:28:13 +11:00
khazad.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
kpp.c crypto: api - Fix CRYPTO_USER checks for report function 2023-05-02 18:22:24 +08:00
lrw.c crypto: lrw,xts - Replace strlcpy with strscpy 2023-07-14 18:23:14 +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
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
michael_mic.c crypto: michael_mic - fix broken misalignment handling 2021-02-10 17:55:55 +11:00
nhpoly1305.c crypto: poly1305 - add new 32 and 64-bit generic versions 2020-01-16 15:18:12 +08:00
ofb.c crypto: remove cipher routines from public crypto API 2021-01-03 08:41:35 +11:00
pcbc.c crypto: remove cipher routines from public crypto API 2021-01-03 08:41:35 +11:00
pcrypt.c crypto: pcrypt - Fix hungtask for PADATA_RESET 2023-11-28 17:19:42 +00:00
poly1305_generic.c crypto: poly1305 - add new 32 and 64-bit generic versions 2020-01-16 15:18:12 +08:00
polyval-generic.c crypto: x86/polyval - Add PCLMULQDQ accelerated implementation of POLYVAL 2022-06-10 16:40:17 +08:00
proc.c crypto: proc - Print fips status 2023-02-14 13:39:33 +08:00
ripemd.h crypto: rmd320 - remove RIPE-MD 320 hash algorithm 2021-01-29 16:07:04 +11:00
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
rng.c crypto: api - Fix CRYPTO_USER checks for report function 2023-05-02 18:22:24 +08:00
rsa-pkcs1pad.c crypto: api - Use data directly in completion function 2023-02-13 18:35:14 +08:00
rsa.c crypto: rsa - add a check for allocation failure 2024-01-25 15:35:15 -08:00
rsa_helper.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
rsaprivkey.asn1
…
rsapubkey.asn1
…
scatterwalk.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
scompress.c crypto: scomp - fix req->dst buffer overflow 2024-01-25 15:35:18 -08:00
seed.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
seqiv.c crypto: api - Use data directly in completion function 2023-02-13 18:35:14 +08:00
serpent_generic.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
sha1_generic.c crypto: sha - split sha.h into sha1.h and sha2.h 2020-11-20 14:45:33 +11:00
sha3_generic.c crypto: Replace HTTP links with HTTPS ones 2020-07-23 17:34:20 +10:00
sha256_generic.c crypto: sha256 - remove duplicate generic hash init function 2021-12-31 18:10:54 +11:00
sha512_generic.c crypto: sha512 - remove imaginary and mystifying clearing of variables 2021-08-27 16:30:19 +08:00
shash.c crypto: shash - Allow cloning on algorithms with no init_tfm 2023-05-24 18:12:33 +08:00
sig.c crypto: sig - Remove some unused functions 2023-07-20 22:15:12 +12:00
simd.c crypto: algapi - use common mechanism for inheriting flags 2020-07-16 21:49:08 +10:00
skcipher.c crypto: api - Fix CRYPTO_USER checks for report function 2023-05-02 18:22:24 +08:00
sm2.c crypto: sm2 - Fix crash caused by uninitialized context 2023-09-20 13:10:10 +08:00
sm2signature.asn1 crypto: sm2 - introduce OSCCA SM2 asymmetric cipher algorithm 2020-09-25 17:48:54 +10:00
sm3.c crypto: sm3,sm4 - move into crypto directory 2022-04-08 16:11:48 +08:00
sm3_generic.c crypto: sm3 - make dependent on sm3 library 2022-01-28 16:51:11 +11:00
sm4.c crypto: sm4 - export sm4 constant arrays 2022-04-08 16:12:46 +08:00
sm4_generic.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
streebog_generic.c crypto: streebog - remove two unused variables 2019-08-15 21:52:14 +10:00
tcrypt.c crypto: api - Move low-level functions into algapi.h 2023-04-14 18:59:34 +08:00
tcrypt.h crypto: tcrypt - include larger key sizes in RFC4106 benchmark 2023-01-20 18:29:31 +08:00
tea.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
testmgr.c crypto: testmgr - Add some test vectors for cmac(camellia) 2023-04-20 18:20:04 +08:00
testmgr.h crypto: testmgr - Add some test vectors for cmac(camellia) 2023-04-20 18:20:04 +08:00
twofish_common.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
twofish_generic.c crypto: Prepare to move crypto_tfm_ctx 2022-12-02 18:12:40 +08:00
vmac.c crypto: remove cipher routines from public crypto API 2021-01-03 08:41:35 +11:00
wp512.c crypto: wp512 - disable kmsan checks in wp512_process_buffer() 2022-12-30 22:56:27 +08:00
xcbc.c crypto: remove cipher routines from public crypto API 2021-01-03 08:41:35 +11:00
xctr.c crypto: xctr - Add XCTR support 2022-06-10 16:40:16 +08:00
xor.c crypto: xor - fix template benchmarking 2024-10-04 16:28:49 +02:00
xts.c crypto: xts - use 'spawn' for underlying single-block cipher 2024-01-10 17:16:54 +01:00
xxhash_generic.c crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN 2020-01-09 11:30:53 +08:00
zstd.c lib: zstd: Add kernel-specific API 2021-11-08 16:55:21 -08:00