microprofile

Microprofile is a embeddable profiler in a few files, written in C++ Microprofile is hosted on

github: https://github.com/jonasmr/microprofile.git

Integration

#include "microprofile.h"
{
	MICROPROFILE_SCOPEI("group","timername", MP_YELLOW);
	... code to be timed
}

And once each frame you should call

MicroProfileFlip(nullptr);

The implementation of microprofile is in microprofile.cpp, which you must include in your project.

The nullpointer is the void* device context passed for gpu timers.

MicroProfile can be used without calling MicroProfileFlip, in which case you should call MicroProfileDumpFileImmediately, to save the profile data as .html/.csv file on disk.

Gpu Timing

Gpu timers work like normal timers, except they are all put in a shared group, "GPU". To use them insert MICROPROFILE_SCOPEGPUI(). Gpu timers also supports multithreaded renderers - Please refer to demo_nouid3d12 for an example of how to use this. Gpu timers are available for the following apis:

OpenGL
D3D11
D3D12
Vulkan

Counters

MicroProfile has support for tracking various counters, that will then be shown in the live & capture views.

	MICROPROFILE_COUNTER_ADD("memory/main", 1000);
	MICROPROFILE_COUNTER_SET("fisk/geder/", 42);

Live View

To start microprofile in live mode, simply point chrome to host:1338/ The live view can be used to enable different microprofile groups, using the Control menu. If no groups are enabled, no code is timed. Press the capture button to generate a capture. By default the last 30 frames are capture. The capture itself is a fully contained webpage, that can be saved and shared for further reference.

There are a few ways the webserver can be invoked

host:1338/100 (capture 100 frames)
host:1338/p/foo (start live view, load preset foo)
host:1338/b/foo (start live view, load builtin preset foo)

Presets can be loaded and saved directly from the webbrowser. They are saved by the application in a file named mppresets.cfg. builtin presets are presets, that are loaded from mppresets.builtin.cfg. They work like presets, except they only be loaded. This is intended to be used to do predefined, non-overwriteable configurations.

#Capture view Capturing in live view provides a complete view of what is recorded in the ring buffers over a set amount of frames. Please be aware if you capture to far behind, the markers you're are looking for might be overwritten, in which case there will be no markers. As the buffers are reused per thread, this is something that will happen on a per thread basis.

#Example code

noframes: Using microprofile to profile an application without any concept of frames. dumps a capture at the end. No live view.
noui: frame based implementation. with live view. No gpu timing
noui_d3d11: frame based implementation, with live view and D3D11 gpu timers
noui_d3d12: frame based implementation, with live view and D3D12 gpu timers
noui_d3d12_multithreading: frame based implementation, with live view and D3D12 gpu timers, with gpu timings generated from multiple threads.
noui_vulkan: Copy of the vulkan Hologram sample, fixed to use microprofile cpu and gpu markers. Only tested on windows.

Dependencies

Microprofile supports generating compressed captures using miniz(http:/code.google.com/miniz).

Resource usage

MicroProfile uses a few large allocations.

One global instance of struct MicroProfile
One Large Allocation per thread that its tracking (MICROPROFILE_PER_THREAD_BUFFER_SIZE, default 2mb)
One Large Allocation per gpu buffer used (MICROPROFILE_PER_THREAD_GPU_BUFFER_SIZE, default 128k)
one thread for sending
one thread for handling context switches, when enabled
128kb for context switch data, when context switch tracing is enabled.
two small variable size buffers. should not be more than a few kb.
- A state buffer for receiving websocket packets
- A state buffer for loading/saving settings.
one small allocation for receiving packets from the sender

To change how microprofile allocates memory, define these macros when compiling microprofile implementation

MICROPROFILE_ALLOC
MICROPROFILE_REALLOC
MICROPROFILE_FREE

microprofile.config.h

Microprofile has lots of predefined macros that can be changed. To modify this, make sure MICROPROFILE_USE_CONFIG is defined, and put the changed defines in microprofile.config.h.

Known Issues & Limitations

There are a few minor known issues & Limitations:

Currently the relative placement of gpu timings vs the cpu timings tend to slide a bit, and thus the relative position of GPU timestamps and CPU timestamp are not correct.
Chrome has an internal limit to how big a page it will cache. if you generate a capture file that is larger than 32mb, chrome will refuse to cache it. This causes the page to redownload when you save it, which is pretty catastrophic, since it will generate a capture. To mitigate this:
- Use miniz. This drastically reduces the size of captures, to the point where its no longer a problem
- If you still have issues, increase chromes disk cache size.
If you're dynamically creating threads, you must call MicroProfileOnThreadExit when threads exit, to reuse the thread log objects

Console support

Microprofile supports the two major consoles - Search for 'microprofile' in the closed platform forums.

License

Licensed using unlicense.org

julien1619/microprofile