Testing Notes¶

I built the patch and installed with onu and confirmed that we were using the non-FPU versions of the raidz routines.

Before Change¶

$ pfexec mdb -ke 'zfs_vdev_raidz_impl/X; vdev_raidz_fastest_impl::print'
zfs_vdev_raidz_impl:
zfs_vdev_raidz_impl:            ffffffff
{
    init = 0
    fini = 0
    gen = [ avx2_gen_p, avx2_gen_pq, avx2_gen_pqr ]
    rec = [ avx2_rec_p, avx2_rec_q, avx2_rec_r, avx2_rec_pq, avx2_rec_pr, avx2_rec_qr, avx2_rec_pqr ]
    is_supported = 0
    name = [ "fastest" ]
}

After Change¶

$ pfexec mdb -ke 'zfs_vdev_raidz_impl/X; vdev_raidz_fastest_impl::print'
zfs_vdev_raidz_impl:
zfs_vdev_raidz_impl:            ffffffff
{
    init = 0
    fini = 0
    gen = [ scalar_gen_p, scalar_gen_pq, scalar_gen_pqr ]
    rec = [ scalar_rec_p, scalar_rec_q, scalar_rec_r, scalar_rec_pq, scalar_rec_pr, scalar_rec_qr, scalar_rec_pqr ]
    is_supported = 0
    name = [ "fastest" ]
}

Tunable¶

I confirmed that ...

# echo 'set zfs:zfs_fpu_enabled = 1' > /etc/system.d/enable_fpu
# reboot

... is enough to re-enable the AVX routines on this system.