Bheve: Slow linux syscalls on AMD

[Nils Beyer]

Hi Peter,

Peter Grehan wrote:
>> Confirmed. Running a bhyved 3-vCPU-"CentOS 6.5", the host CPU load for
>> "vcpu 0" is around 12% now.
> 
>   Doh, that's not good - haven't given Centos 6.5 a try; will now to
> investigate this.

CentOS is a bit bitchy about booting from harddisk. You'll have to provide a
shorter "linux"-grub-line than what's written in the "grub.conf"-file; some-
thing like this:

	linux /vmlinuz-2.6.32-431.el6.x86_64 ro root=/dev/mapper/VolGroup-lv_root
	initrd /initramfs-2.6.32-431.el6.x86_64.img

or else the LVM-groups won't get activated.


>> Ping times to the VM are fluctuating - ranging from 0.185ms to 35ms.
> 
>   Hmmm, will look at that as well.

For what it's worth, this is my "bhyve"-command line:
===============================================================================
bhyve \
	-w \
	-c 3 \
	-m 4096M \
	-A \
	-H \
	-P \
	-l com1,/dev/nmdm0A \
	-s 0,hostbridge \
	-s 1,lpc \
	-s 2,ahci-cd,/mnt/iso/${ISO} \
	-s 3,virtio-blk,lun0 \
	-s 4,virtio-blk,lun1 \
	-s 5,virtio-net,tap0 \
	${VM}
===============================================================================

My host CPU is an "AMD Phenom(tm) II X6 1055T Processor"...


Regards,
Nils