Connect to localhost by default.

Signed-off-by: Matt Benjamin <matt@linuxbox.com>
Prototype mapped memory transfer test.

Signed-off-by: Matt Benjamin <matt@linuxbox.com>
Fix nmsgs at 20K.

Signed-off-by: Matt Benjamin <matt@linuxbox.com>
Revise buffered workload.

This commit adds an xio_mempool subtype to ceph::buffer.

Signed-off-by: Matt Benjamin <matt@linuxbox.com>