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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