-------- Forwarded Message -------- From: Adam Jackson <a...@redhat.com> Subject: Re: Wondering about cirris and stdvga Date: Fri, 18 Nov 2016 15:23:59 -0500 Message-Id: <1479500639.16973.3.ca...@redhat.com>
On Fri, 2016-11-18 at 11:26 -0800, Stefano Stabellini wrote: > > I am no Xorg maintainer but back in the XenClient days we did some > perf > analysis and it turned out that the bitblt operations supported by > Cirrus are actually very slow to emulate in QEMU. Yep. Turns out the "acceleration" is still going to be running on a CPU, so you can either take a hypercall for every operation, or not. The X drivers for a while now have detected virtual cirrus devices and defaulted to a shadow framebuffer instead, partly for this reason and partly to hide the absolutely terrible 24bpp framebuffer format from applications. - ajax -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK) _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
