Prevent XYZAC TP queue starvation

web/worker/test_xyzac_3d_chips.mjs

@@ -46,6 +46,7 @@ const run = send("PROGRAM_RUN");
 assert.equal(run.kind, "COMMAND_RESULT");
 let stepped = null;
 let executionTraceEntries = 0;
+let runningQueueGaps = 0;
 // The first long Z feed is planned at the configured LinuxCNC TP limit. Give
 // the fixed-tick simulation enough servo time to complete it before checking
 // that the interpreter has advanced beyond the historical line-82 boundary.
@@ -55,6 +56,7 @@ for (let cycle = 0; cycle < cyclesToRun; cycle += 1) {
   stepped = send("SIM_STEP", { cycles: 1, response: "motion_delta" });
   assert.equal(stepped.kind, "COMMAND_RESULT");
   executionTraceEntries += stepped.payload.execution_trace.length;
+  if (cycle > 0 && stepped.payload.program.program_status === "running" && Number(stepped.payload.wasm_motion.state.queue_depth) === 0) runningQueueGaps += 1;
 }
 assert.equal(stepped.kind, "COMMAND_RESULT");
 assert.equal(stepped.payload.program.program_status, "running");
@@ -65,6 +67,7 @@ assert.equal(stepped.payload.motion_authority, "wasm");
 assert.equal(Object.hasOwn(stepped.payload.xyzac_ledger.entries.at(-1), "response"), false);
 assert.equal(session.timeline.snapshots.snapshots.size, 0);
 assert.equal(session.ledger.audit({ maxEntries: 32 }).entries.length, 32);
+assert.equal(runningQueueGaps, 0);
 
 console.log(JSON.stringify({
   schema: "xyzac-3d-chips-program.v1",
@@ -77,6 +80,7 @@ console.log(JSON.stringify({
   cycles: cyclesToRun,
   execution_line: stepped.payload.program.current_line,
   execution_trace: executionTraceEntries,
+  running_queue_gaps: runningQueueGaps,
   motion_authority: stepped.payload.motion_authority,
   motion_delta_snapshots: session.timeline.snapshots.snapshots.size,
   ledger_audit_window: session.ledger.audit({ maxEntries: 32 }).entries.length,