When using Tag Sets, each allocation will additionally store the Asset name or the Object class name. To use Tag Sets, define LLM_ALLOW_ASSETS_TAGS in LowLevelMemory.h. If the scope is platform-specific, add to the enumerated type in the same way within the platform-specific LLM files, for example, LLM.cpp and LLM.h. To add a new tag you will need to do the following:Īdd a value to the ELLMTag enumerated type found in LowLevelMemTracker.h.Īdd a corresponding element to the ELLMTagNames array found in LowLevelMemTracker.cpp.Īdd tag scopes to the code using the LLM_SCOPE macro. This is the UStaticMesh class and related properties, and does not include the actual mesh data. It corresponds to the number of Objects placed in the Level.Īny low-level memory that is not tracked in any other category.Īny task that is kicked off from the task graph that doesn't have its own category. Note that this stat doesn't include Mesh or Animation data which are tracked separately. UObject is a catch-all for all Engine and game memory that is not tracked in any other category. This includes any class that inherits from UObject and anything that is serialized by that class including properties.
The following Tag Categories currently exist within the Engine: CSV file, so that the values can be analyzed. LLM also writes out the stat values to a.
The current total for each tag will be shown in MB. LLM stats can be viewed in-game using the stat LLM or stat LLMFULL Console Commands. LLM maintains a stack of tag scopes and applies the top tag to the allocation. Any allocation made within that scope will be given the specified tag. The tags are applied using tag-scope macros. The total of all of the categories will add up to the total amount of memory used for the game. This means that all memory is tracked once and only once, nothing is missed, and nothing is counted twice.
The frequency can be changed using the LLM.LLMWriteInterval Console Variable.Įvery memory allocation made by the Engine (including game code) is assigned a tag value identifying the category to which it belongs. A new line is written every 5 seconds (by default). The file will contain a column for each tag showing the current value in MB. CSV file will be written out to saved/profiling/llm/. When using the -LLMCSV command-line argument, the. Shows stats for all memory allocated from the OS. All lower level engine stats are grouped under a single Engine stat.
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