[ Comments below, in line ] On Thursday 22 October 2009 at 8:25 am, Jan Pe?iva penned about "Re: [vbox-users] performance report"
> Thanks for your comment. My impression is that CPU performance is ok, > but the disk access suffers. 90% of time spent in kernel is telling that > the problem is probably in disk virtualization or windows driver. Let's > recall that non-kernel mode is running natively on CPU (or am I > mistaken?). It would be nice if someone could make the same test (Qt > compilation on MSVC2005 compiler) on the processor with full VT. If he > will not get better results then there is a serious performance problem > in VBox disk access (Ubuntu host, WinXP guest). Hi, My desktop machine is quite powerful. It's an I7 950 (3.07GHz quad-core) with 6GB of RAM. My drives I use for my VM's are also very good. Natively, I get 120MB/s on sequential scans. I built this machine with the intention of virtualizing. One of my VM's is a `Windows Server 2003' I do my development on Linux and test (using shared folders) the code within the VM. This is my sandbox. The Test machine runs Windows Server 2003. It's a quad-core Xeon (E5440 @ 2.83GHz) and has 16GB of RAM. Yesterday, I promoted data changes to the Test machine. On my machine, virtualized, it took 30 minutes to run the entire process; btw, my VM only gets 1.5GB. On the Test machine, it took 40 minutes. Using `gkrellm', while my VM is hammering its drive, I see spikes of upwards of 80-90MB/s - not 120MB - but I'm not sure if it's a function of SQL Server not pushing the drives hard enough or the VM. But 80-90MB/s is good enough for me. ;) Cheers, -- Pablo Sanchez - Blueoak Database Engineering, Inc Ph: 819.459.1926 Fax: 760.860.5225 (US) _______________________________________________ vbox-users mailing list vbox-users@virtualbox.org http://vbox.innotek.de/mailman/listinfo/vbox-users
