* re-do "Use the Perfetto SDK instead of ATRACE" (#8701)
This time we create an entirely new private header: Tracing.h which
uses the perfetto SDK instead of ATRACE. The old Systrace.h is
unchanged to presever backward compatibility but is essentially
deprecated and no longer used within the filament repo.
The new TRACING_ macros use an explicit CATEGORY parameter, which is
declared in Tracing.h.
Moreover, tracing can be compiled out by defining
FILAMENT_TRACING_ENABLED to false before including Tracing.h
iOS tracing is still supported and still controlled via
FILAMENT_APPLE_SYSTRACE.
There are three perfetto categories defined:
- "filament/filament"
- "filament/jobsystem"
- "filament/gltfio"
The "filament/jobsystem" category is compiled out by default.
And they can be enabled in AGI / perfetto by adding:
```
data_sources {
config {
name: "track_event"
track_event_config {
disabled_categories: "*"
enabled_categories: "filament/filament"
enabled_categories: "filament/jobsystem"
enabled_categories: "filament/gltfio"
}
}
}
```
* Update libs/utils/include/private/utils/Tracing.h
Co-authored-by: Powei Feng <powei@google.com>
* Update libs/utils/src/android/Tracing.cpp
Co-authored-by: Powei Feng <powei@google.com>
* remove all references to SYSTRACE_TAG
---------
Co-authored-by: Powei Feng <powei@google.com>
CompilerThreadPool:
- it now supports a thread cleanup function
- some initialization is moved to the setup function
OpenGLPlatform:
- now cleans-up the thread pool threads upon exit
- remove support for non-shared contextes parallel compilation.
this wasn't used. we can always revive it later if we need to.
- rework how callbacks work so that we don't have to use a work list
executed at each tick() in the shared context case (common case).
this improves performance significantly on low-end devices, by
not having to go through the list to check if all programs are
compiled, multiple times per frame.
The new CallbackManager handles scheduling the callbacks after all
previous programs are compiled.
Mathias AgopianandPowei Feng
Ben Doherty