#[test]
#[cfg(feature = "gpu")]
#[serial_test::serial]
fn test_parity053d_concurrent_processing() {
println!("PARITY-053d: Concurrent Batch Processing");
println!("========================================");
println!();
println!(" CONCURRENCY MODEL:");
println!(" - Each request in batch spawns a tokio task");
println!(" - Tasks run concurrently (not sequentially)");
println!(" - process_batch() awaits all tasks before returning");
println!();
println!(" WHY CONCURRENT (not true batch inference):");
println!(" - True batch inference requires model.forward_batch()");
println!(" - Current model uses generate_with_cache() per request");
println!(" - Concurrent processing still improves throughput:");
println!(" * Overlaps CPU computation between requests");
println!(" * Better utilization under high load");
println!(" * Foundation for future true batch support");
println!();
println!(" THROUGHPUT IMPROVEMENT:");
println!(" - Sequential: N * latency_per_request");
println!(" - Concurrent: ~latency_per_request (with overhead)");
println!(" - Actual speedup depends on model/hardware contention");
println!();
println!(" FUTURE: TRUE BATCH INFERENCE");
println!(" - Requires model.forward_batch(token_ids_batch)");
println!(" - Single GPU kernel launch for all requests");
println!(" - 10x+ throughput improvement possible (PARITY-050)");
assert!(true, "PARITY-053d: Concurrency documented");
}
#[test]
#[cfg(feature = "gpu")]
#[serial_test::serial]
fn test_parity053e_batch_process_result() {
use crate::api::BatchProcessResult;
println!("PARITY-053e: BatchProcessResult Structure");
println!("=========================================");
println!();
let result = BatchProcessResult {
requests_processed: 16,
was_batched: true,
total_time_ms: 125.0,
avg_latency_ms: 7.8,
};
println!(" FIELDS:");
println!(
" requests_processed: {} (number of requests in batch)",
result.requests_processed
);
println!(
" was_batched: {} (batch >= min_batch)",
result.was_batched
);
println!(
" total_time_ms: {:.1} (wall clock time)",
result.total_time_ms
);
println!(
" avg_latency_ms: {:.1} (per-request average)",
result.avg_latency_ms
);
println!();
println!(" METRICS CALCULATION:");
println!(" throughput = requests_processed / (total_time_ms / 1000)");
println!(
" throughput = {} / {:.3} = {:.1} req/s",
result.requests_processed,
result.total_time_ms / 1000.0,
result.requests_processed as f64 / (result.total_time_ms / 1000.0)
);
assert_eq!(result.requests_processed, 16);
assert!(result.was_batched);
assert!((result.total_time_ms - 125.0).abs() < f64::EPSILON);
}
#[test]
#[cfg(feature = "gpu")]
#[serial_test::serial]
fn test_parity053f_summary() {
println!("PARITY-053f: Batch Processor Implementation Summary");
println!("===================================================");
println!();
println!(" IMPLEMENTATION STATUS: ✅ COMPLETE");
println!();
println!(" FUNCTIONS ADDED (api.rs):");
println!(" ✅ spawn_batch_processor() - Creates channel and spawns task");
println!(" ✅ batch_processor_task() - Main event loop with timeout batching");
println!(" ✅ process_batch() - Concurrent request processing");
println!();
println!(" STRUCTS ADDED:");
println!(" ✅ BatchProcessResult - Batch processing metrics");
println!();
println!(" BATCHING STRATEGY:");
println!(" ✅ Size-triggered: batch >= optimal_batch (16)");
println!(" ✅ Time-triggered: window_ms timeout (10ms)");
println!(" ✅ Graceful shutdown: process remaining on channel close");
println!();
println!(" INTEGRATION STATUS:");
println!(" ✅ spawn_batch_processor() ready for server startup");
println!(" ✅ AppState.with_batch_config() wires channel to state");
println!(" ⏳ Handler modification pending (use batch path)");
println!();
println!(" NEXT STEPS:");
println!(" PARITY-054: Modify completions handler to use batch path");
println!(" PARITY-055: Benchmark batch throughput");
println!(" PARITY-056: Validate M4 parity achievement");
assert!(true, "PARITY-053f: Summary documented");
}
#[test]
#[cfg(feature = "gpu")]
#[serial_test::serial]
fn test_parity054a_handler_batch_path() {
println!("PARITY-054a: Handler Batch Path Integration");
println!("===========================================");
println!();
println!(" LOCATION: src/api.rs::openai_completions_handler()");
println!();
println!(" BATCH PATH FLOW:");
println!(" 1. Check state.batch_enabled()");
println!(" 2. Get batch_tx from state.batch_request_tx()");
println!(" 3. Create oneshot channel for response");
println!(" 4. Build ContinuousBatchRequest");
println!(" 5. Send via batch_tx.send().await");
println!(" 6. Await response_rx.await");
println!(" 7. Extract generated_tokens(), decode, return response");
println!();
println!(" FALLBACK CONDITIONS:");
println!(" - state.batch_enabled() returns false");
println!(" - batch_tx.send() fails");
println!(" - response_rx receives error (channel dropped)");
println!(" -> Falls through to single-request path");
assert!(true, "PARITY-054a: Batch path documented");
}
#[test]
#[cfg(feature = "gpu")]
#[serial_test::serial]
fn test_parity054b_response_format() {
println!("PARITY-054b: Response Format Changes");
println!("====================================");
println!();
println!(" SINGLE-REQUEST PATH:");
println!(" id: \"cmpl-cached-{{timestamp}}\"");
println!(" model: \"cached-q4k\"");
println!();
println!(" BATCH PATH:");
println!(" id: \"cmpl-batch-{{timestamp}}\"");
println!(" model: \"batch-q4k-{{batch_size}}\"");
println!();
println!(" EXAMPLE BATCH RESPONSE:");
println!(" {{");
println!(" \"id\": \"cmpl-batch-1734267890123\",");
println!(" \"object\": \"text_completion\",");
println!(" \"model\": \"batch-q4k-16\",");
println!(" \"choices\": [{{ ... }}],");
println!(" \"usage\": {{ ... }}");
println!(" }}");
println!();
println!(" OBSERVABILITY:");
println!(" - model field indicates batch size used");
println!(" - Can track batch vs single requests in logs/metrics");
assert!(true, "PARITY-054b: Response format documented");
}
#[test]
#[cfg(feature = "gpu")]
#[serial_test::serial]
fn test_parity054c_backward_compatibility() {
println!("PARITY-054c: Backward Compatibility");
println!("===================================");
println!();
println!(" DEFAULT BEHAVIOR:");
println!(" - batch_enabled() returns false");
println!(" - Handler uses single-request path");
println!(" - No change to existing deployments");
println!();
println!(" OPT-IN BATCH MODE:");
println!(" // During server startup");
println!(" let batch_tx = spawn_batch_processor(model.clone(), config);");
println!(" let state = AppState::with_cached_model(model)?");
println!(" .with_batch_config(batch_tx, BatchConfig::default());");
println!();
println!(" GRACEFUL DEGRADATION:");
println!(" - If batch channel fails, falls back to single-request");
println!(" - If batch processor crashes, existing requests continue");
println!(" - Metrics continue recording for both paths");
assert!(true, "PARITY-054c: Backward compatibility documented");
}
#[test]
#[cfg(feature = "gpu")]
#[serial_test::serial]
fn test_parity054d_batch_request_structure() {
println!("PARITY-054d: Batch Request Structure");
println!("====================================");
println!();
println!(" ContinuousBatchRequest FIELDS:");
println!(" prompt_tokens: Vec<u32> // Tokenized input");
println!(" max_tokens: usize // Generation limit");
println!(" temperature: f32 // Sampling temperature");
println!(" top_k: usize // Top-k sampling");
println!(" response_tx: oneshot::Sender // Response channel");
println!(" submitted_at: Instant // For latency tracking");
println!();
println!(" CONSTRUCTED FROM:");
println!(" - prompt_tokens: tokenizer.encode(&request.prompt)");
println!(" - max_tokens: request.max_tokens.unwrap_or(256)");
println!(" - temperature: request.temperature.unwrap_or(0.7) as f32");
println!(" - top_k: 1 if temperature == 0.0 else 40");
println!();
println!(" CHANNEL LIFECYCLE:");
println!(" 1. Handler creates oneshot channel");
println!(" 2. response_tx moved into ContinuousBatchRequest");
println!(" 3. Handler awaits response_rx");
println!(" 4. Batch processor sends via response_tx");
println!(" 5. Handler receives ContinuousBatchResponse");
assert!(true, "PARITY-054d: Request structure documented");
}
#[test]
#[cfg(feature = "gpu")]
#[serial_test::serial]
fn test_parity054e_error_handling() {
println!("PARITY-054e: Error Handling");
println!("===========================");
println!();
println!(" ERROR SCENARIOS:");
println!();
println!(" 1. Batch send fails (batch_tx.send().is_err()):");
println!(" -> Fall through to single-request path");
println!(" -> No error returned to client");
println!();
println!(" 2. Response channel dropped (response_rx error):");
println!(" -> Fall through to single-request path");
println!(" -> No error returned to client");
println!();
println!(" 3. Token decode fails:");
println!(" -> Return 500 Internal Server Error");
println!(" -> Record failure metric");
println!();
println!(" RESILIENCE:");
println!(" - Batch path failures are non-fatal");
println!(" - Single-request path always available");
println!(" - Client receives response either way");
assert!(true, "PARITY-054e: Error handling documented");
}
#[test]
#[cfg(feature = "gpu")]
#[serial_test::serial]
fn test_parity054f_summary() {
println!("PARITY-054f: Handler Batch Integration Summary");
println!("==============================================");
println!();
println!(" IMPLEMENTATION STATUS: ✅ COMPLETE");
println!();
println!(" HANDLER MODIFICATION:");
println!(" ✅ Check state.batch_enabled() before generation");
println!(" ✅ Create oneshot channel for response");
println!(" ✅ Send ContinuousBatchRequest via batch_tx");
println!(" ✅ Await response via oneshot receiver");
println!(" ✅ Fall back to single-request on failure");
println!();
println!(" RESPONSE CHANGES:");
println!(" ✅ id: \"cmpl-batch-{{timestamp}}\"");
println!(" ✅ model: \"batch-q4k-{{batch_size}}\"");
println!();
println!(" BACKWARD COMPATIBLE:");
println!(" ✅ batch_enabled() false by default");
println!(" ✅ No change to existing deployments");
println!(" ✅ Graceful fallback on batch failure");
println!();
println!(" BATCH INFERENCE PATH COMPLETE:");
println!(" ✅ PARITY-052: Batch request queuing (structs)");
println!(" ✅ PARITY-053: Batch processor task");
println!(" ✅ PARITY-054: Handler batch integration");
println!();
println!(" NEXT STEPS:");
println!(" PARITY-055: Benchmark batch throughput");
println!(" PARITY-056: Validate M4 parity achievement");
assert!(true, "PARITY-054f: Summary documented");
}