I'm using a FreeBSD 10.0 with XENHVM Kernel support.
Testing the drive i/o of the xbd0 is quite poor. It seems absolutely no caching exists, as it's existing if I'm installing the same system on a physical machine.
Is this performance loss known/expected in a XENHVM environment? Is there a way to enable the known freebsd caching?
Any help is welcome!
Jimmy
Testing the drive i/o of the xbd0 is quite poor. It seems absolutely no caching exists, as it's existing if I'm installing the same system on a physical machine.
dmesg shows this about xbd0 setting:
Code:
xbd0: 61440MB <Virtual Block Device> at device/vbd/768 on xenbusb_front0
xbd0: attaching as ada0
xbd0: features: write_barrier
xbd0: synchronize cache commands enabled.Is this performance loss known/expected in a XENHVM environment? Is there a way to enable the known freebsd caching?
Any help is welcome!
Jimmy