mirror of
https://github.com/comfyanonymous/ComfyUI.git
synced 2025-10-24 23:44:20 +00:00
4739d7717f
* execution: fold in dependency aware caching This makes --cache-none compatiable with lazy and expanded subgraphs. Currently the --cache-none option is powered by the DependencyAwareCache. The cache attempts to maintain a parallel copy of the execution list data structure, however it is only setup once at the start of execution and does not get meaninigful updates to the execution list. This causes multiple problems when --cache-none is used with lazy and expanded subgraphs as the DAC does not accurately update its copy of the execution data structure. DAC has an attempt to handle subgraphs ensure_subcache however this does not accurately connect to nodes outside the subgraph. The current semantics of DAC are to free a node ASAP after the dependent nodes are executed. This means that if a subgraph refs such a node it will be requed and re-executed by the execution_list but DAC wont see it in its to-free lists anymore and leak memory. Rather than try and cover all the cases where the execution list changes from inside the cache, move the while problem to the executor which maintains an always up-to-date copy of the wanted data-structure. The executor now has a fast-moving run-local cache of its own. Each _to node has its own mini cache, and the cache is unconditionally primed at the time of add_strong_link. add_strong_link is called for all of static workflows, lazy links and expanded subgraphs so its the singular source of truth for output dependendencies. In the case of a cache-hit, the executor cache will hold the non-none value (it will respect updates if they happen somehow as well). In the case of a cache-miss, the executor caches a None and will wait for a notification to update the value when the node completes. When a node completes execution, it simply releases its mini-cache and in turn its strong refs on its direct anscestor outputs, allowing for ASAP freeing (same as the DependencyAwareCache but a little more automatic). This now allows for re-implementation of --cache-none with no cache at all. The dependency aware cache was also observing the dependency sematics for the objects and UI cache which is not accurate (this entire logic was always outputs specific). This also prepares for more complex caching strategies (such as RAM pressure based caching), where a cache can implement any freeing strategy completely independently of the DepedancyAwareness requirement. * main: re-implement --cache-none as no cache at all The execution list now tracks the dependency aware caching more correctly that the DependancyAwareCache. Change it to a cache that does nothing. * test_execution: add --cache-none to the test suite --cache-none is now expected to work universally. Run it through the full unit test suite. Propagate the server parameterization for whether or not the server is capabale of caching, so that the minority of tests that specifically check for cache hits can if else. Hard assert NOT caching in the else to give some coverage of --cache-none expected behaviour to not acutally cache.