Date: Fri, 24 Oct 2014 10:05:15 +0200 From: Willem Jan Withagen <wjw@digiware.nl> To: virtualization@freebsd.org Subject: Bhyve building kernel....Just an observation Message-ID: <544A083B.50007@digiware.nl>
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Hi,
Just out of curiosity I did the following:
Updated 10-STABLE src in both Dom0 and in the Bhyve FreeBSD VM
Rebooted my bhyve AMD testing machine so it was in a fresh state.
Nothing special loaded orhter than ZFS.
And build a 10-STABLE kernel on the raw box, that took about 6 minutes.
no {make,src}.conf, so the full GENERIC KERNEL
That took about 6:45 minutes.
Again rebooted to clean the box up.
And then booted a 10-STABLE bhyve VM with all memory and processors
assigned to the VM. So all the power could be available to the VM.
The build again 10-STABLE in the VM.
That took about 9:30 minutes.
Now it looks like the VM has a 50% overhead.
My expectations were quite a bit better for the performance difference
between the two?
Would people with more experience in doing VM stuff expect such a large
difference?
Or is this a to be expected result?
Thanx,
--WjW
System info:
Dom0:
11.0-CURRENT FreeBSD 11.0-CURRENT #1 r273066M
(110.0 Head with Neel's patch)
CPU: AMD Phenom(tm) II X6 1075T Processor (3013.83-MHz K8-class
16 Gb Ram
ZFS mirror
2* 500Gb WD WD5000AA
cache 2* Samsung SSD 840 PRO Series DXM05B0Q
Dom Bhyve
FreeBSD 10.0-RELEASE-p9
ahci-hd 16GB
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