tree cbc458a208601fe3113bc8313f992204ddb03da0
parent d3199a31c7bc72f6bcecbb3ebcc16940a1721e10
author Kevin Wolf <kwolf@redhat.com> 1436785997 +0200
committer Kevin Wolf <kwolf@redhat.com> 1465374069 +0200

qemu-img bench: Implement -S (step size)

With this new option, qemu-img bench can be told to advance the current
offset after each request by a different value than the buffer size.
This is useful for controlling the conditions for cluster allocation in
image formats (e.g. qcow2 cluster allocation with COW in front of the
request, or COW areas that aren't overwritten immediately).

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>