Re: [Qemu-devel] fail to test virtio-gpu with heaven benchmark4.0

[Marc-André Lureau]

hi

----- Original Message -----
> Hi all,
> 
> I tried to use virtio-gpu to do some test, the glmark2 works, but when I
> ran heaven benchmark in Guest,
> 
> the application could not be ran. I have collected the output message.
> pls see attachment file.
> 
> I built my environment according to the requirement in
> https://copr.fedorainfracloud.org/coprs/kraxel/virgl/，

It should no longer be necessary, everything is in fedora 24

See also:
http://blog.wikichoon.com/2016/05/spice-openglvirgl-acceleration-on.html

> both guest/host kernel version: 4.6
> 
> I used the latest qemu forked from master branch
> (e00da552a0dc82f4ec7896281eada7201e69f1db),
> 
> and run qemu with:
> 
> ~/data/linux-src/qemu$ ./x86_64-softmmu/qemu-system-x86_64 -vga virtio
> -display gtk,gl=on --enable-kvm -m 4000 -smp 4,sockets=1,cores=4 -hda
> /home/chenfan/imgs/fedora23.qcow2  -cpu host
> 
> when running the heaven benchmark application the qemu has some output
> as following, I don't know how to fix that,
> 
> do you have some hints? thanks in advance :)
> 
> 
> the qemu output messages:
> (qemu-system-x86_64:4628): Gdk-WARNING **:
> gdk_gl_context_set_required_version - GL context versions less than 3.2
> are not supported.
> gl_version 33 - core profile enabled
> vrend_compile_shader: context error reported 3 "Xorg" Illegal shader 0
> shader failed to compile
> 0:23(34): error: could not implicitly convert operands to arithmetic
> operator
> 0:23(34): error: operands to arithmetic operators must be numeric
> 0:23(17): error: no matching function for call to
> `uintBitsToFloat(error)'; candidates are:
> 0:23(17): error:    vec4 uintBitsToFloat(uvec4)
> 0:23(17): error:    float uintBitsToFloat(uint)
> 0:23(17): error:    vec2 uintBitsToFloat(uvec2)
> 0:23(17): error:    vec3 uintBitsToFloat(uvec3)
> 0:23(17): error:    vec4 uintBitsToFloat(uvec4)
> 0:23(12): error: cannot construct `vec4' from a non-numeric data type
> (snip)
> vrend_report_buffer_error: context error reported 3 "Xorg" Illegal
> command buffer 149816321

This is a virglrenderer bug, translating a shader. You could try with 
virglrenderer from git, and if it still fails, report a bug to the virgl 
mailing list.

Regarding benchmarks, those aren't so great if you compare them with the host 
today (especially "artificial" benchmarks like glmark2), I would say it's 
between 30-50% of host, so there is room for improvements.

thanks