On 25-10-2014 1:21, Peter Grehan wrote: > Hi Willem, >> 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. > > You'll most likely want to keep some memory and processor resources > available for the host system. ZFS will need memory for ARC and CPU for > operations - if these aren't available, it will compete with bhyve's use > of CPUs, and there will be times when these are conflicting.
Hi Peter, Thanx for the hint. The assumption that the performance difference is, is Disk-IO is at least not very obvious from the simple test. Both tests were running from a 6Gb tmpfs Dom0 had 16Gb Ram, and I limited DomU to 12G Ram. Tested it once in Dom0, and it takes ~ 5Gb of tmp store. It holds src and obj, and I see no disk traffic while building. Building kernel with just the default tmpfs (all avail mem + swap) takes 6:30 (zfs with ssd's) versus 5:30 (tmpfs) Running in DomU is get about the same difference: with ahci-hd/zfs backing 9:30 with tmpfs 8:30 So I would think the difference is not really in the IO-performance. But as usual: All other opinions more than appreciated. --WjW _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-virtualization To unsubscribe, send any mail to "freebsd-virtualization-unsubscr...@freebsd.org"