[jade-cho]

Description of the issue(symptom, root-cause, how it was resolved)

• Symptom: GPU RandomUniform returns the same values on every inference (CPU: new values per call).
• Root cause: the op is constant-folded at compile time, the kernel has no Philox state (seeds are JIT constants), and ShapeOf -> RandomUniform is skipped as a shape_of subgraph.
• Fix: exclude it from constant propagation and shape_of subgraphs. Pass seed/state as runtime kernel args and advance the state per execution like the CPU plugin.

The code and line that caused this issue (if it is not changed directly)

• intel_gpu/src/graph/program.cpp: program::mark_if_constant()
• intel_gpu/src/kernel_selector/kernels/random_uniform/random_uniform_kernel_ref.cpp: GetJitConstants() (GLOBAL_SEED / OP_SEED as JIT constants)
• intel_gpu/src/graph/graph_optimizer/mark_shape_of_subgraphs.cpp: can_mark_node() -> skipped in primitive_inst::prepare_primitive()

Reproduction step and snapshot (if applicable. Do not attach for customer model)

• Model: x + RandomUniform([1,50,32], 0, 1) (or torch.rand / torch.randn_like converted to OV), compiled on GPU, 5 infers on one request
• Before: 1/5 distinct outputs. After: 5/5 distinct outputs, same as CPU

Problematic graph

• Static: Const(shape), Const(min), Const(max) -> RandomUniform -> Add(x). RandomUniform is removed by propagate_constants.
• Dynamic: Parameter -> ShapeOf -> RandomUniform -> .... RandomUniform runs only on the 1st inference.

Checklist

• Is it a proper fix? (not a workaround)
• Did you include test case for this fix, if necessary?
  • unit: random_uniform_gpu_state_test, mark_shape_of_subgraphs.random_uniform_no_mark
  • func: smoke_RandomUniformInfer, smoke_RandomUniformDynamicInferGPUTest
  • All 8 new cases fail without the fix and pass with it.
• Did you review existing test that can be extended to cover this scenario? Which test did you review?
  • smoke_BasicRandomUniform and random_uniform_gpu_test run a single inference only, so they cannot catch repeated-call issues. Added state tests in random_uniform_gpu_test.cpp, and extended mark_shape_of_subgraphs_test.cpp.

Tickets:

• CVS-199309

AI Assistance:

• AI assistance used: yes
• AI helped with analysis, code and tests. Validated by local build, unit/func tests and the ticket reproducer on Arc B70 and UHD 770.