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GPU Development Diary, Day 50.

A physical binding has a scope.

G binds ref c to a slot for D’s execution: ready → running → done. The binding can end with D, while ref c and its dependency meaning stay unchanged. Placement is temporary; identity is not.

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September 4, 2026 at 10:57 AM
GPU Development Diary, Day 49.

Bind placement as late as possible.

The graph carries ref c, not an address. When D becomes ready, G resolves ref c to a physical slot. Late binding keeps dependencies stable while leaving placement free until execution.

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September 3, 2026 at 11:05 AM
GPU Development Diary, Day 48.

Placement changes should not rewrite the graph.

A resolver maps ref c to current storage only when execution needs it. The edge still names ref c. G keeps graph identity stable while placement remains a local runtime choice.

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September 2, 2026 at 12:47 PM
GPU Development Diary, Day 47.

A reference identity is not a memory address.

ref c names one immutable result, even if storage moves or is reused. G separates dependency identity from placement, so graph meaning does not change with physical memory layout.

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September 1, 2026 at 10:11 AM
GPU Development Diary, Day 46.

A reference is a fact, not a mutable slot.

Once ref c is available, its value cannot change. A later result is ref d on a new edge. G expresses evolution by producing references, so readers never race with in-place mutation.

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August 31, 2026 at 2:32 PM
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August 31, 2026 at 6:30 AM
GPU Development Diary, Day 45.

Reference availability is monotonic.

Once ref c is available, it never becomes unavailable. Downstream readiness cannot be revoked. G treats references as stable facts, so the dependency graph advances without rollback.

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August 30, 2026 at 10:05 AM
GPU Development Diary, Day 44.

Completion is an output reference.

C does not announce that a task ended. RUNNING completes when ref c becomes available. Downstream consumers observe that reference: completion re-enters G as data, not a control event.

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August 29, 2026 at 10:04 AM
GPU Development Diary, Day 43.

Admission consumes readiness.

When C moves from READY to RUNNING, readiness is replaced, not copied. A second admission cannot see that eligibility. Launch is one transition, so duplicate execution is excluded by construction.

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August 28, 2026 at 11:01 AM
GPU Development Diary, Day 42.

Readiness is a state, not a pulse.

Once C's inputs are available, C stays ready until admitted. No arrival event must be replayed. G keeps eligibility in the computation state, so waiting loses no dependency information.

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August 27, 2026 at 10:40 AM
GPU Development Diary, Day 41.

Ready does not mean running.

Once every required reference is available, C is eligible. This is a semantic fact, not an immediate launch command. Execution can begin later; readiness and admission are separate states.

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August 26, 2026 at 10:35 AM
GPU Development Diary, Day 40.

Readiness is local to a consumer's inputs.

If C consumes ref a and ref b, it becomes eligible when both are available. Unrelated references do not enter this decision. C's own dependency set defines the gate.

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August 25, 2026 at 10:04 AM
GPU Development Diary, Day 39.

A dependency edge is also a readiness condition.

B does not wait for A as a named task. It becomes eligible when ref a is available. Readiness follows data arrival, leaving unrelated work free to proceed.

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August 24, 2026 at 11:21 AM
GPU Development Diary, Day 38.

Ordering is written as data dependence.

To require A before B, G uses no statement position or implicit barrier. B consumes a reference from A. That dependency becomes an edge both compiler and GPU can see.

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August 23, 2026 at 11:01 AM
GPU Development Diary, Day 37.

Textual order is not execution order.

In G, A written before B does not imply A < B. Only a reference path creates that relation. Independent declarations remain incomparable, so layout cannot serialize GPU work.

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August 22, 2026 at 10:07 AM
GPU Development Diary, Day 36.

G has no single global next instruction.

Its reference DAG defines a partial order: R1 < R3 and R2 < R3, while R1 and R2 remain incomparable. Only edges impose order; everything else stays available for parallel execution.

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August 21, 2026 at 11:00 AM
GPU Development Diary, Day 35.

Branches rejoin without merging identities.

Given R1 and R2, G creates R3 through two incoming edges: R1 -> R3 and R2 -> R3. The inputs remain distinct; convergence creates a successor, not a mutable shared object.

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August 20, 2026 at 10:12 AM
GPU Development Diary, Day 34.

Acyclic does not mean serial.

From R0, G may emit R1 and R2 as distinct forward successors. Neither overwrites R0, and neither must wait on the other. Reference history is a branching DAG, not a single mutable chain.

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August 19, 2026 at 10:41 AM
GPU Development Diary, Day 33.

A reference path cannot loop into its own past.

If R0 --advance--> R1 --advance--> R2, G rejects R2 --advance--> R0. That cycle would make every reference both earlier and later. Directed evolution must remain acyclic.

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August 18, 2026 at 10:50 AM
GPU Development Diary, Day 32.

Direction gives evolution its order.

For R --advance--> R', the successor may follow R, but R never follows R'. G reads order from the edge itself: evolution moves forward while recorded history remains immutable.

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August 17, 2026 at 11:31 AM
GPU Development Diary, Day 31.

Evolution is an edge, not an overwrite.

G records R --advance--> R'. R keeps its original identity; R' names the successor. The edge carries continuity, letting later computation follow evolution without rewriting history.

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August 16, 2026 at 11:48 AM
GPU Development Diary, Day 30.

Continuation creates a new reference.

Moving state from S@gMAX to S'@g0 does not retarget R=(S,gMAX). G creates R'=(S',g0) for the successor. Continuity is an explicit reference transition, never hidden pointer mutation.

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August 15, 2026 at 10:04 AM
GPU Development Diary, Day 29.

Retiring a slot does not retire computation.

After S reaches gMAX, G allocates S'@g0. Generation restarts safely because the slot changed: (S,g0) != (S',g0). Work continues without stale references aliasing new storage.

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August 14, 2026 at 10:53 AM
GPU Development Diary, Day 28.

A generation must never wrap into an old identity.

At gMAX, G retires slot S instead of resetting it to g0. Reuse stops before a stale (S,g0) can match again. Identity ends; it never cycles.

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August 13, 2026 at 10:55 AM
GPU Development Diary, Day 27.

Storage reuse advances generation.

After W0@g0 is reclaimed, slot S may hold W2@g2. The address is reused; identity is not. Reference (S,g0) must fail against (S,g2). G rejects stale references without forbidding reuse.

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August 12, 2026 at 10:10 AM