[global]
filename=/dev/nvme1n1
size=64m
rw=read
direct=1
stonewall

[1k_block]
bs=1k

[4k_block]
bs=4k

[1m_block]
bs=1m

[2m_block]
bs=2m

[4m_block]
bs=4m

[8m_block]
bs=8m

[16m_block]
bs=16m

[32m_block]
bs=32m