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Revert "Check" This reverts commit dddaf1b. Check graph pool TODO: -> this requires additional patch in MP to reset initialized_ flag in CalculatorGraph and verify if that works. Previous MP tests with reruns worked due to using AddVectorSink which changes the underlying graph and does not use OutputStreamPollers. Need to verify if change in MP will enable graph pool or we need to go back to thread pool. Rebase POC MP FW test POC part 2 WIP to stash
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The graph queue pre-initializes a pool of MediaPipe graph instances that are reused across requests, avoiding the overhead of creating and destroying graphs per request. Queue size is resolved during graph validation.
Decision logic (in priority order)
Explicit pbtxt directive — Add a comment in the graph .pbtxt file:
# OVMS_GRAPH_QUEUE_SIZE: AUTO— pool sized tostd::thread::hardware_concurrency()# OVMS_GRAPH_QUEUE_SIZE: <N>— pool of exactly N graphs (must be ≤ hardware threads)# OVMS_GRAPH_QUEUE_SIZE: 0or # OVMS_GRAPH_QUEUE_SIZE: -1 — explicitly disable poolThis directive is always honored, regardless of env var or calculator type.
Environment variable
OVMS_GRAPH_QUEUE_OFF=1— Suppresses the auto-enable default. Does not override an explicit pbtxt directive.If there is no comment in pbtxt file nor environment variable set then graph pool is enabled by default.
Python calculator — If the graph contains PythonExecutorCalculator, the pool is automatically disabled (not yet safe for reuse).
Default — If none of the above apply, the pool is enabled with AUTO sizing.