How do we use the memory profiler to track memory usage between matches?

Development Platform & Builds Debugging, Optimization, & Profiling
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1

Is there a good way to do this? Is there a way to automate this?

2

You can use the old memory profiler or the new stats based profiler.
At this moment I recommend using the old system which has a tool to compare the memory usage.

To enable:
In the BuildConfiguration.xml
add bUseMallocProfiler with true

Memory profiling is usually a manual process. If you want to automate this:

You need to add a new enumeration to EProfilingPayloadSubType after SUBTYPE_LicenseeBase
Add a new method like:

void FMallocProfiler::SnapshotMemoryMyNewEnumeration(const FString& Tag)
{
	if (GMallocProfiler && !GMallocProfiler->bEndProfilingHasBeenCalled)
	{
		GMallocProfiler->SnapshotMemory(SUBTYPE_SnapshotMarker_MyNewEnumeration, Tag);
	}
}

Between matches you need to call:
MALLOC_PROFILER( FMallocProfiler::SnapshotMemoryMyNewEnumeration( UniqueTag ); )

In the tool you need to add new marker here:
MemoryProfiler2.EProfilingPayloadSubType

If you reload a map between matches, you can probably use existing tag, like SUBTYPE_SnapshotMarker_LoadMap_Start

To automate this you need to change the tool, probably add functionality to dump memory usage between SUBTYPE_SnapshotMarker_LoadMap_Start, but memory profiler has visible overhead and running profiler throughout several matches may generate enormous files. Tool is written in C# and it’s kind of slow :slight_smile:
You should verify if automation process is really feasible.

3

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4

Yeah sure. Thanks for the answer.