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infra: improve digest benchmarking

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This commit is contained in:
Thomas Schoebel-Theuer 2022-02-24 22:21:15 +01:00
parent b4b8898736
commit 5a212753e6
1 changed files with 62 additions and 11 deletions
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73
kernel/mars_generic.c
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@ -481,7 +481,7 @@ long mars_digest(__u32 digest_flags,
#ifdef CONFIG_MARS_BENCHMARK
static
void benchmark_digest(char *name, __u32 flags)
__u32 benchmark_digest(char *name, __u32 flags)
{
unsigned char*testpage = kzalloc(PAGE_SIZE, GFP_KERNEL);
unsigned char old_test[MARS_DIGEST_SIZE] = {};
@ -489,11 +489,11 @@ void benchmark_digest(char *name, __u32 flags)
long long delta;
long res_val;
__u32 res_flags;
__u32 test_flags = flags;
unsigned char bit;
bool report_once = false;
int i;
usable_digest_mask = MREF_CHKSUM_ANY;
delta =
TIME_THIS(
for (bit = 1; bit; bit <<= 1) {
@ -508,22 +508,36 @@ void benchmark_digest(char *name, __u32 flags)
if (unlikely(res_val < 0 || !(res_flags & flags))) {
MARS_ERR("digest %s failed code=%ld\n",
name, res_val);
res_flags &= flags;
goto err;
}
if (unlikely(!report_once &&
res_flags & ~test_flags)) {
report_once = true;
MARS_INF("digest %s was superseded 0x%x => 0x%x\n",
name, test_flags, res_flags);
test_flags |= res_flags;
}
if (unlikely(!memcmp(old_test, new_test, MARS_DIGEST_SIZE))) {
MARS_ERR("digest %s is not good enough\n",
name);
MARS_ERR("digest %s is not good enough, flags=0x%x\n",
name, res_flags);
goto err;
}
test_flags &= res_flags;
memcpy(old_test, new_test, MARS_DIGEST_SIZE);
}
}
);
printk(KERN_INFO "%-10s digest duration = %12lld ns\n",
name, delta);
res_flags |= test_flags;
err:
kfree(testpage);
usable_digest_mask = MREF_CHKSUM_MD5_OLD;
res_flags |= MREF_CHKSUM_MD5_OLD;
cond_resched();
return res_flags;
}
#endif
@ -531,6 +545,7 @@ void benchmark_digest(char *name, __u32 flags)
static
int init_mars_digest(void)
{
__u32 checked_digests;
int status;
md5_tfm = crypto_alloc_shash("md5", 0, 0);
@ -594,19 +609,55 @@ int init_mars_digest(void)
}
#endif
checked_digests = MREF_CHKSUM_MD5_OLD;
#ifdef CONFIG_MARS_BENCHMARK
/* Side effect of benchmarks:
* Check that configured digests are actually working.
*/
#ifdef HAS_CRC32C
benchmark_digest("crc32c", MREF_CHKSUM_CRC32C);
if (crc32c_tfm)
checked_digests |=
benchmark_digest("crc32c", MREF_CHKSUM_CRC32C);
#endif
#ifdef HAS_CRC32
benchmark_digest("crc32", MREF_CHKSUM_CRC32);
if (crc32_tfm)
checked_digests |=
benchmark_digest("crc32", MREF_CHKSUM_CRC32);
#endif
#ifdef HAS_SHA1
benchmark_digest("sha1", MREF_CHKSUM_SHA1);
if (sha1_tfm)
checked_digests |=
benchmark_digest("sha1", MREF_CHKSUM_SHA1);
#endif
benchmark_digest("md5old", MREF_CHKSUM_MD5_OLD);
benchmark_digest("md5", MREF_CHKSUM_MD5);
checked_digests |=
benchmark_digest("md5old", MREF_CHKSUM_MD5_OLD);
if (md5_tfm)
checked_digests |=
benchmark_digest("md5", MREF_CHKSUM_MD5);
#else
/* Without any benchmark results, we need
* to enable all _initialized_ digests for safety.
* If they don't actually work for whatever reason,
* runtime spits may occur ;)
*/
#ifdef HAS_CRC32C
if (crc32c_tfm)
checked_digests |= MREF_CHKSUM_CRC32C;
#endif
#ifdef HAS_CRC32
if (crc32_tfm)
checked_digests |= MREF_CHKSUM_CRC32;
#endif
#ifdef HAS_SHA1
if (sha1_tfm)
checked_digests |= MREF_CHKSUM_SHA1;
#endif
if (md5_tfm)
checked_digests |= MREF_CHKSUM_MD5;
#endif
usable_digest_mask = checked_digests;
return 0;
}