phics memory is mapped WC.
Mapping it UC would cause quite a performance degradation. This could be the
reason for the reported VGA performance drop in another email thread. IMHO,
since QEMU emulates VGA, this could be mapped WB.
Thanks,
Frank.
On Mon, May 3, 2010 at 2:07 PM, Frank Berreth wrote:
&g
Hello,
I am using a modified patch for the ivshmem device that was posted here
recently and discovered some performance issues with it. Essentially I
measure write performance into the PCI memory that is mapped into the VM as
really slow (about 60mb/sec). I assume that is because there is trapping
