IMX6 Solo GPU Performance Issue With opengl ES 1.1

[vishnumotghare]

We have an IMX6 solo custom device running with WinCE7 & Linux running

We have developed a custom benchmark application using OpenGL ES1.1

When I ran the benchmark application on WinCE7 the performance looked good

[code]Environment information
-----------------------
EGL version : 1.4
GL vendor : Vivante Corporation
GL renderer : Vivante GC880
GL version : OpenGL ES1.1

run scene 'Floating Frame3D VBO'
initialize, DATA_SIZE:11264, No of Frames:512
Average FPS = 48.075005
---

run scene 'Floating Frame3D'
initialize, DATA_SIZE:11264, No of Frames:512
Average FPS = 31.975005
---

run scene 'Frame 3D Fixed'
initialize, DATA_SIZE:11264, No of Frames:512
Average FPS = 31.505484
---

run scene 'Floating graph'
Average FPS = 238.403093
---

run scene 'Fixed graph'
Average FPS = 238.187271[/code]

Running the same application on Linux shows a 50 % drop in performance

[code]Environment information
-----------------------
EGL version : 1.4
GL vendor : etnaviv
GL renderer : Vivante GC880 rev 5106
GL version : OpenGL ES 1.1 Mesa 22.0.3

run scene 'Floating Frame3D VBO'
initialize, DATA_SIZE:11264, No of Frames:512
Average FPS = 26.872623
---

run scene 'Floating Frame3D'
initialize, DATA_SIZE:11264, No of Frames:512
Average FPS = 24.373300
---

run scene 'Frame 3D Fixed'
initialize, DATA_SIZE:11264, No of Frames:512
Average FPS = 23.783205
---

run scene 'Floating graph'
Average FPS = 136.624447
---

run scene 'Fixed graph'
Average FPS = 136.510016[/code]

On Linux, we are using Mainline 5.15 kernel, xf86-video-armada, and below is the xorg.conf configuration

[code]Section "Device"
Identifier "Kernel Framebuffer Device"

Screen 0

Driver "armada"

Option "fbdev" "/dev/fb0"
Option "Hotplug" "FALSE"
Option "HWCursor" "TRUE"
Option "UseGPU" "TRUE"
Option "XvAccel" "TRUE"
Option "XvPreferOverlay" "TRUE"
Option "AccelModule" "etnadrm_gpu"
Option "AccelModule" "etnaviv_gpu"
Option "DRI" "TRUE"
EndSection

Section "ServerFlags"
Option "BlankTime" "0"
Option "StandbyTime" "0"
Option "SuspendTime" "0"
Option "OffTime" "0"
EndSection[/code]

I'm investigating the cause of the performance drop in Linux but I'm unsure where to look. Any help is appreciated. Thanks in advance