Optics/Embree times

[SachaBarre]

When running mitsuba from the command line, it prints out some general information and the timing of some key steps. For the latter, what does the time attached to "Embree ready" or "OptiX ready" (for CPU or GPU) measure?

Example:

2023-04-20 16:34:07 INFO  main  [mitsuba.cpp:334] Mitsuba version 3.2.1 (master[9a3c249b], Linux, 64bit, 20 threads, 16-wide SIMD)
2023-04-20 16:34:07 INFO  main  [mitsuba.cpp:335] Copyright 2022, Realistic Graphics Lab, EPFL
2023-04-20 16:34:07 INFO  main  [mitsuba.cpp:336] Enabled processor features: cuda llvm avx512 avx2 avx fma f16c sse4.2 x86_64
2023-04-20 16:34:07 INFO  main  [xml.cpp:1412] Loading XML file "richGeo_100.xml" with variant "cuda_rgb"..
2023-04-20 16:34:08 INFO  main  [Scene] Building scene in OptiX ..
2023-04-20 16:34:08 INFO  main  [Scene] OptiX ready. (took 193ms)

[njroussel]

Hi @SachaBarre

Here's the source code for Embree and OptiX for those timings. In short it's the time needed to initialize the library and build the acceleration structure.