Patrace fail to Replay offscreen trace

[YulinLi]

Recently, I have been trying to capture a pure offscreen compute application, which is executed as a binary.

The trace is perfect, I check with trace_to_txt. However, even I set it to noscreen, I still cannot replay it normally, could you recommend me some setting to retrace is successfully?

Thanks!!!

[per-mathisen-arm]

What happens on replay? Is this application available online somewhere?

[YulinLi]

Hi,

Due to the app is still in development, it cannot be available online. Sorry about that.

The error message is :
"
{
"error" : [ "TRACE_ERROR_GENERIC" ],
"error_description" : [
"[c9,f0] Offscreen Framebuffer incomplete: FBO1, 0 x 0, tex_format=1908, tex_internal_format=1908, tex_type=1401, depth_rbo_format=81A6, stencil_rbo_format=0, status=8CD6"
]
}
"

And the API section related to framebuffer :

[0] 169 : ret=void glGenFramebuffers(n=1, framebuffers={1})
[0] 170 : ret=void glBindFramebuffer(target=GL_FRAMEBUFFER, framebuffer=1)
[0] 171 : ret=void glGenTextures(n=1, textures={1})
[0] 172 : ret=void glBindTexture(target=GL_TEXTURE_2D, texture=1)
[0] 173 : ret=void glTexStorage2D(target=GL_TEXTURE_2D, levels=1, internalformat=GL_RGBA8, width=4, height=4)
[0] 174 : ret=void glFramebufferTexture2D(target=GL_FRAMEBUFFER, attachment=GL_COLOR_ATTACHMENT0, textarget=GL_TEXTURE_2D, texture=1, level=0)
[0] 175 : ret=void glDrawBuffers(n=1, bufs={36064})
[0] 176 : ret=void glViewport(x=0, y=0, width=4, height=4)
[0] 177 : ret=void glClear(mask=0x4000=(GL_COLOR_BUFFER_BIT))
[0] 178 : ret=void glGenFramebuffers(n=1, framebuffers={2})
[0] 179 : ret=void glBindFramebuffer(target=GL_FRAMEBUFFER, framebuffer=2)

Thanks!

[per-mathisen-arm]

You appear to be running with offscreen option. That makes no sense for compute. What error do you get without it?

[YulinLi]

Yes, you are right. This error message is due to one of my experiments with replaying the trace. The original error message is below:

============================================================

glws_egl.cpp,444: EGL Configurations:
                                                                                                    Specified EGL configuration:
                                                                                                    EGL_RED_SIZE:       8
                                                                                                    EGL_GREEN_SIZE:     8
                                                                                                    EGL_BLUE_SIZE:      8
                                                                                                    EGL_ALPHA_SIZE:     8
                                                                                                    EGL_DEPTH_SIZE:     24
                                                                                                    EGL_STENCIL_SIZE:   0
                                                                                                    EGL_SAMPLES:        -1
                                                                                                    EGL_SAMPLE_BUFFERS: 0
                                                                                     
                                                                                                    Selected EGL configuration:
                                                                                                    EGL_RED_SIZE:       8
                                                                                                    EGL_GREEN_SIZE:     8
                                                                                                    EGL_BLUE_SIZE:      8
                                                                                                    EGL_ALPHA_SIZE:     8
                                                                                                    EGL_DEPTH_SIZE:     24
                                                                                                    EGL_STENCIL_SIZE:   8
                                                                                                    EGL_SAMPLES:        4
                                                                                                    EGL_SAMPLE_BUFFERS: 1

2025-06-06 18:40:15.510 13857-13893 paretrace64             com.arm.pa.paretrace                 I  glws_egl.cpp,459: Checking sane EGL config.
2025-06-06 18:40:15.510 13857-13893 paretrace64             com.arm.pa.paretrace                 A  [c4294967295,f0] Failed EGL sanity check

============================================================
I suspect that the EGL sanity check is failing only because the trace is broken. However, every API call and all shader code look good in trace_to_txt. Do you think this can be fixed by using different parameter settings? Thanks!