VirtIOGPUBenchmarkComparisonCN

1. 硬件信息

内存速度通过sudo dmidecode --type 17来检测
平台 1(i7 9代机器, 4核8线程，32G内存):

CPU: Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz
Memory: MemTotal: 32709264 kB, 2666 MT/s

平台 2(i5 4代机器，4核4线程，32G内存):

CPU: Intel(R) Core(TM) i5-4460  CPU @ 3.20GHz
Memory: MemTotal: 32808212 kB, 1600 MT/s 

测试中使用同一块sata ssd:

Disk 1: Crucial 500GB sata ssd. 

测试显卡信息, 一块为WX5100 8G, 一块为5700 xt 8G(检测命令为 lspci | grep -i vga):

Card1: VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT] (rev c4)
Card2: VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon Pro WX 5100]

2. 系统/软件信息

列举如下:

$ cat /etc/issue
Ubuntu 20.04.4 LTS \n \l
$ uname -a
Linux hope 5.4.0-120-generic #136-Ubuntu SMP Fri Jun 10 13:40:48 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
$ qemu-system-x86_64 --version
QEMU emulator version 6.0.0 (Debian 1:6.0+dfsg-2expubuntu1~focal1.0)
Copyright (c) 2003-2021 Fabrice Bellard and the QEMU Project developers
$ dpkg -l | grep -i virgl
ii  libvirglrenderer-dev:amd64                 0.8.2-1ubuntu1.1                      amd64        virtual GPU for KVM virtualization - headers
ii  libvirglrenderer1:amd64                    0.8.2-1ubuntu1.1                      amd64        virtual GPU for KVM virtualization

软件信息:

Unigine_Heaven-4.0
Unigine_Valley-1.0
glmark2
Redroid(Android 12)
scrcpy

3. 桌面场景测试

3.1 裸机对比(WX5100)

结论:

1. i5/i7平台上，WX5100表现基本一致。
2. 因WX5100算力比较一案，i5-4代没有成为测试中的瓶颈位。

3.2 裸机对比(5700xt)

结论:

1. 5700xt在i7平台上运行远比i5平台上流畅，4代i5平台无法发挥5700xt的算力特性，具体表现为：glmark2跑分差距较大，Unigine valley帧率相差较大(1080场景下掉了约70帧)，4K下表现一致。
2. 显卡选型时需充分考虑CPU/内存等平台算力特性。

3.3 Virgl On i5-4460(WX5100)

结论:

1. glmark2: Virgl跑分约为裸机的31.3%。
2. Unigine场景跑分: Virgl性能并未出现明显折损，因为WX5100本身算力一般, CPU足够支撑virgl转码开销。

3.4 Virgl On i7-9700K(WX5100)

结论:

1. glmark2: Virgl 约为裸机跑分的44.2%。
2. Unigine场景跑分: Virgl性能并未出现明显折损，因为WX5100本身算力一般, CPU足够支撑virgl转码开销。
3. 提升平台算力(CPU,内存等)有助于提升opengl转码效率(对比3.3场景下glmark2跑分).

3.5 Virgl On i5-4460(5700xt)

结论:

1. glmark2: Virgl约为裸机的21%。
2. Unigine Valley/Unigine Heaven: Virgl约为裸机跑分的55%~60%, 但在4K场景下，Virgl为裸机的87%。

3.6 Virgl On i7-9700K(5700xt)

结论:

1. glmark2: Virgl约为裸机的19%。
2. Unigine Valley/Unigine Heaven: Virgl约为裸机跑分的55%~60%, 但在4K场景下，Virgl为裸机的83%。

4. Android 场景

结论:

1. 鲁大师跑分极限: 约为60+万分，跑分时支持的最大分辨率为1080p(待确认)?
2. scrcpy开启与否会影响跑分结果: 尤其在低端CPU上跑分下降尤为明显。
3. 当GPU算力不至于成为瓶颈的场景下，virgl在安卓下渲染的跑分可以达到裸机极限跑分的: 90% (i7-9700K + 5700xt)
4. WX5100可能成为跑分的性能瓶颈的场景下， virgl安卓渲染跑分在i7下可达到裸机极限的: 85% (i7-9700K + WX5100), i5下可达到裸机极限的: 77% (i5-4460 + WX5100)

VirtIOGPUBenchmarkComparison

1. HardWare Info

Detect the memory speed via sudo dmidecode --type 17.
Hardware 1(i7 9th machine):

CPU: Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz
Memory: MemTotal: 32709264 kB, 2666 MT/s

Hardware 2(i5 machine):

CPU: Intel(R) Core(TM) i5-4460  CPU @ 3.20GHz
Memory: MemTotal: 32808212 kB, 1600 MT/s 

Use the same ssd disk:

Disk 1: Crucial 500GB sata ssd. 
Disk 2: nvme ssd 256GB. 

Graphical Card Info(Detected via lspci | grep -i vga):

Card1: VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT] (rev c4)
Card2: VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon Pro WX 5100]

2. System/SoftWare Info

System and Software info listed as:

500GB Crucial ssd:

$ cat /etc/issue
Ubuntu 20.04.4 LTS \n \l
$ uname -a
Linux hope 5.4.0-120-generic #136-Ubuntu SMP Fri Jun 10 13:40:48 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
$ qemu-system-x86_64 --version
QEMU emulator version 6.0.0 (Debian 1:6.0+dfsg-2expubuntu1~focal1.0)
Copyright (c) 2003-2021 Fabrice Bellard and the QEMU Project developers
$ dpkg -l | grep -i virgl
ii  libvirglrenderer-dev:amd64                 0.8.2-1ubuntu1.1                      amd64        virtual GPU for KVM virtualization - headers
ii  libvirglrenderer1:amd64                    0.8.2-1ubuntu1.1                      amd64        virtual GPU for KVM virtualization

nvme ssd 256GB:

$ cat /etc/issue
Pop!_OS 21.10 \n \l
$ uname -a
Linux pop-os 5.17.15-76051715-generic #202206141358~1655919116~21.10~1db9e34 SMP PREEMPT Wed Jun 22 19 x86_64 x86_64 x86_64 GNU/Linux
$ qemu-system-x86_64 --version
QEMU emulator version 6.0.0 (Debian 1:6.0+dfsg-2expubuntu1.3)
Copyright (c) 2003-2021 Fabrice Bellard and the QEMU Project developers
$ dpkg -l | grep -i virgl
ii  libvirglrenderer1:amd64                 0.8.2-5ubuntu0.21.10.1                                            amd64        virtual GPU for KVM virtualization

Software:

Unigine_Heaven-4.0
Unigine_Valley-1.0
glmark2
Redroid(Android 12)

3. Desktop Scenario

3.1 BareMetal Comparison(WX5100)

Conclusion:

1. WX5100 behaves almost the same on both i5/i7 platforms.
2. i5’s cpu power won’t be a bottleneck in WX5100 scenario.

3.2 BareMetal Comparison(5700xt)

Conclusion:

1. 5700xt runs smoother in i7 than on i5, perhaps i5 4th is too old for working together with 5700xt?(4 cores, bus width, etc).
2. i5’s CPU/Memory becomes a bottleneck in 5700xt testing.

3.3 Virgl On i5-4460(WX5100)

Conclusion:

1. glmark2: Virgl is 31.3% of the baremetal performance.
2. Unigine Valley/Unigine Heaven: Virgl performance almost the same as baremetal.

3.4 Virgl On i7-9700K(WX5100)

Conclusion:

1. glmark2: Virgl is 44.2% of the baremetal performance.
2. Unigine Valley/Unigine Heaven: Virgl performance almost the same as baremetal.
3. Comparing to 3.3: glmark2 will be improved using powerful CPU/Memory.

3.5 Virgl On i5-4460(5700xt)

Conclusion:

1. glmark2: Virgl is 21% of the baremetal performance.
2. Unigine Valley/Unigine Heaven: Virgl is around 55%~60% of the baremetal performance, while in 4k behavior, 87% of the baremetal performance.

3.6 Virgl On i7-9700K(5700xt)

Conclusion:

1. glmark2: Virgl is 19% of the baremetal performance.
2. Unigine Valley/Unigine Heaven: Virgl is around 55%~60% of the baremetal performance, while in 4k behavior, 83% of the baremetal performance.

4. Android Scenario

Conclusion:

1. Ludashi’s top score: around 61W, the maximum performance would be 1080p?
2. scrcpy will greatly impact the performance when using Virgl under low-end CPU.
3. virgl will be 85% for the best of bare metal on WX5100 on i7, 91% of bare metal on 5700xt on i7

UsingGimpForPhotoEditing

Create the new image:

Adjust the little image via:

160x200 px, resolution is 160 px/in.

Then select/copy the image into the big images, save as jpg, then we could print out the image.

RebuildQemuForBenchmark

AIM

Rebuild qemu for enlarge the frame-rate for benchmark GPU, following are the steps.

Get the SourceCode

Steps are:

$ sudo apt-get install build-essential pbuilder
$ dpkg -l | grep qemu
### Get the installed package name is `qemu-system-x86`
$ sudo vim /etc/apt/sources.list
$ sudo apt-get update
$ mkdir tmp
$ cd tmp/
$ apt-get source qemu-system-x86
$ ls
qemu-4.2  qemu_4.2-3ubuntu6.23.debian.tar.xz  qemu_4.2-3ubuntu6.23.dsc  qemu_4.2.orig.tar.xz

Code Changes

Refers to https://www.reddit.com/r/VFIO/comments/nviap2/in_case_your_games_output_60_fps_but_the/:

$ vim ./qemu-4.2/include/ui/console.h
......
/* in ms */
- #define GUI_REFRESH_INTERVAL_DEFAULT    30
+ #define GUI_REFRESH_INTERVAL_DEFAULT    16
#define GUI_REFRESH_INTERVAL_IDLE     3000
......

Rebuild the deb packages, first install the build dependencies for qemu-system-x86:

$ sudo apt-get build-dep qemu-system-x86

Now Rebuild the package via:

$ cd qemu-4.2/
$ dpkg-buildpackage -rfakeroot -b -uc -us
$ sudo dpkg -l | grep qemu
$ sudo apt-get purge qemu qemu-kvm qemu-system-common qemu-system-gui qemu-system-x86 qemu-utils
$ cd ..
$ ls *.deb
$ sudo dpkg -i *.deb
$ sudo apt-get install -f

Verification

No effect on 60 fps.

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