mirror_zfs

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Alexander Motin f3969ea78b Optimize small random numbers generation

In all places except two spa_get_random() is used for small values,
and the consumers do not require well seeded high quality values.
Switch those two exceptions directly to random_get_pseudo_bytes()
and optimize spa_get_random(), renaming it to random_in_range(),
since it is not related to SPA or ZFS in general.

On FreeBSD directly map random_in_range() to new prng32_bounded() KPI
added in FreeBSD 13.  On Linux and in user-space just reduce the type
used to uint32_t to avoid more expensive 64bit division.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored-By: iXsystems, Inc.
Closes #12183

2021-09-14 12:10:17 -07:00

Optimize small random numbers generation

2021-09-14 12:10:17 -07:00

sys

Optimize small random numbers generation

2021-09-14 12:10:17 -07:00

.gitignore

OpenZFS restructuring - move platform specific sources

2019-09-06 11:26:26 -07:00

cityhash.h

Compile cityhash code into libzfs

2020-03-27 09:11:22 -07:00