{ "schema": "burst_tail_1m_result_v1", "parameters": { "business_kib": [ 24, 48, 96 ], "bursts_mib": [ 1 ], "runs": 3, "selection_repeats": 8, "samples_per_run": 10000, "callback_candidates": [ 16, 32, 64, 128, 256 ], "process_timeout": 900, "fixed_callback_iterations": 0, "selected_business_kib": 48, "callback_iterations": 64, "final_window_repeats": 2500, "writer_pool_total_bytes": 16384, "reader_pool_total_bytes": 268435456, "native_slot_storage_bytes": 268435456, "payload_bytes": 32, "business_accesses": 8, "business_warm_queries": 512, "pre_queries": 16, "post_queries": 64, "group_queries": 16, "quantiles": "perrunnearest-rank,then3runarithmeticmean", "selection_rule": "use median-window relative advantages over all burst sizes and runs; among candidates within2%of best score choose most wins, lower run variability, then smaller working set", "machine": { "cpu": "Apple Silicon (arm64)", "os": "macOS-14.4.1-arm64-arm-64bit", "producer_qos": "user_interactive", "hard_affinity": false }, "regular_apis": { "ReaderWriterQueue": "try_enqueue+membercopy", "rigtorp": "try_push;noaddedprefetch", "atomic_queue": "SPSCtry_push" }, "producer_qos": "user_interactive on macOS", "producer_cpu": -1, "publish_count": 4294967295, "scan_current": false, "queue_parameters": { "baseline": { "transport": "two_buf_queue", "mode": "throughput", "payload_bytes": 32, "messages": 10000000, "warmup_messages": 0, "callback_iterations": 64, "verify_payload": true, "prepared_input": false, "variable_payload": true, "prepared_input_limit_bytes": 268435456, "measure_callback_time": false, "producer_interval_ns": 0, "source_block_size": 4096, "source_pool_min": 4, "source_pool_max": 4, "source_queue_capacity": 16, "writer_backpressure": "drop", "writer_spin_count": 1000, "writer_wait_timeout_ms": 5000, "output_block_size": 4096, "output_frame_capacity": 4, "output_pool_min": 65536, "output_pool_max": 65536, "output_queue_capacity": 65538, "cancel_claim_mode": "tail", "output_mode": "spsc", "output_reader_mode": "wait_signal", "output_reader_count": 1, "output_retry_wait_us": 1000, "output_enable_stats": false, "is_scan_current": false, "reader_spin_count": 1000, "rescan_interval_ns": 1000000, "rescan_max_interval_ns": 1000000, "consumer_cpu": -1, "producer_cpu": -1, "producer_qos": "user_interactive", "round_storage_bytes": 214748320, "fixed_round_boundaries": true, "spsc_buffer_bytes": 268435456, "prefault_producer_buffers": true, "finish_timeout_ms": 120000, "work_wait_min_ms": 1, "finish_retry_ms": 1, "publish_count": 4294967295, "use_write_session": false, "rigtorp_write_prefetch": true, "readerwriterqueue_copy_after_zero": false, "spsc_capacity": 0, "retry_yield_every": 1024, "spsc_idle_spins": 1000, "spsc_idle_sleep_ns": 0, "timer": "auto", "sample_every": 256, "max_samples": 100000, "latency_batch_size": 1000, "timer_calibration_samples": 16384, "call_batch_size": 256, "random_seed": 42, "timeout_seconds": 900, "buffer_budget_bytes": 536870912 }, "TwoBufQueue": { "transport": "two_buf_queue", "mode": "throughput", "payload_bytes": 32, "messages": 10000000, "warmup_messages": 0, "callback_iterations": 64, "verify_payload": true, "prepared_input": false, "variable_payload": true, "prepared_input_limit_bytes": 268435456, "measure_callback_time": false, "producer_interval_ns": 0, "source_block_size": 4096, "source_pool_min": 4, "source_pool_max": 4, "source_queue_capacity": 16, "writer_backpressure": "drop", "writer_spin_count": 1000, "writer_wait_timeout_ms": 5000, "output_block_size": 4096, "output_frame_capacity": 4, "output_pool_min": 65536, "output_pool_max": 65536, "output_queue_capacity": 65538, "cancel_claim_mode": "tail", "output_mode": "spsc", "output_reader_mode": "wait_signal", "output_reader_count": 1, "output_retry_wait_us": 1000, "output_enable_stats": false, "is_scan_current": false, "reader_spin_count": 1000, "rescan_interval_ns": 1000000, "rescan_max_interval_ns": 1000000, "consumer_cpu": -1, "producer_cpu": -1, "producer_qos": "user_interactive", "round_storage_bytes": 214748320, "fixed_round_boundaries": true, "spsc_buffer_bytes": 268435456, "prefault_producer_buffers": true, "finish_timeout_ms": 120000, "work_wait_min_ms": 1, "finish_retry_ms": 1, "publish_count": 4294967295, "use_write_session": false, "rigtorp_write_prefetch": true, "readerwriterqueue_copy_after_zero": false, "spsc_capacity": 0, "retry_yield_every": 1024, "spsc_idle_spins": 1000, "spsc_idle_sleep_ns": 0, "timer": "auto", "sample_every": 256, "max_samples": 100000, "latency_batch_size": 1000, "timer_calibration_samples": 16384, "call_batch_size": 256, "random_seed": 42, "timeout_seconds": 900, "buffer_budget_bytes": 536870912 }, "ReaderWriterQueue": { "transport": "readerwriterqueue", "mode": "throughput", "payload_bytes": 32, "messages": 10000000, "warmup_messages": 0, "callback_iterations": 64, "verify_payload": true, "prepared_input": false, "variable_payload": true, "prepared_input_limit_bytes": 268435456, "measure_callback_time": false, "producer_interval_ns": 0, "source_block_size": 4096, "source_pool_min": 4, "source_pool_max": 4, "source_queue_capacity": 16, "writer_backpressure": "drop", "writer_spin_count": 1000, "writer_wait_timeout_ms": 5000, "output_block_size": 4096, "output_frame_capacity": 4, "output_pool_min": 65536, "output_pool_max": 65536, "output_queue_capacity": 65538, "cancel_claim_mode": "tail", "output_mode": "spsc", "output_reader_mode": "wait_signal", "output_reader_count": 1, "output_retry_wait_us": 1000, "output_enable_stats": false, "is_scan_current": false, "reader_spin_count": 1000, "rescan_interval_ns": 1000000, "rescan_max_interval_ns": 1000000, "consumer_cpu": -1, "producer_cpu": -1, "producer_qos": "user_interactive", "round_storage_bytes": 214748320, "fixed_round_boundaries": true, "spsc_buffer_bytes": 268435456, "prefault_producer_buffers": true, "finish_timeout_ms": 120000, "work_wait_min_ms": 1, "finish_retry_ms": 1, "publish_count": 4294967295, "use_write_session": false, "rigtorp_write_prefetch": true, "readerwriterqueue_copy_after_zero": false, "spsc_capacity": 8371713, "retry_yield_every": 1024, "spsc_idle_spins": 0, "spsc_idle_sleep_ns": 12500, "timer": "auto", "sample_every": 256, "max_samples": 100000, "latency_batch_size": 1000, "timer_calibration_samples": 16384, "call_batch_size": 256, "random_seed": 42, "timeout_seconds": 900, "buffer_budget_bytes": 536870912 }, "rigtorp": { "transport": "rigtorp", "mode": "throughput", "payload_bytes": 32, "messages": 10000000, "warmup_messages": 0, "callback_iterations": 64, "verify_payload": true, "prepared_input": false, "variable_payload": true, "prepared_input_limit_bytes": 268435456, "measure_callback_time": false, "producer_interval_ns": 0, "source_block_size": 4096, "source_pool_min": 4, "source_pool_max": 4, "source_queue_capacity": 16, "writer_backpressure": "drop", "writer_spin_count": 1000, "writer_wait_timeout_ms": 5000, "output_block_size": 4096, "output_frame_capacity": 4, "output_pool_min": 65536, "output_pool_max": 65536, "output_queue_capacity": 65538, "cancel_claim_mode": "tail", "output_mode": "spsc", "output_reader_mode": "wait_signal", "output_reader_count": 1, "output_retry_wait_us": 1000, "output_enable_stats": false, "is_scan_current": false, "reader_spin_count": 1000, "rescan_interval_ns": 1000000, "rescan_max_interval_ns": 1000000, "consumer_cpu": -1, "producer_cpu": -1, "producer_qos": "user_interactive", "round_storage_bytes": 214748320, "fixed_round_boundaries": true, "spsc_buffer_bytes": 268435456, "prefault_producer_buffers": true, "finish_timeout_ms": 120000, "work_wait_min_ms": 1, "finish_retry_ms": 1, "publish_count": 4294967295, "use_write_session": false, "rigtorp_write_prefetch": false, "readerwriterqueue_copy_after_zero": false, "spsc_capacity": 8388603, "retry_yield_every": 1024, "spsc_idle_spins": 4000, "spsc_idle_sleep_ns": 1000, "timer": "auto", "sample_every": 256, "max_samples": 100000, "latency_batch_size": 1000, "timer_calibration_samples": 16384, "call_batch_size": 256, "random_seed": 42, "timeout_seconds": 900, "buffer_budget_bytes": 536870912 }, "atomic_queue": { "transport": "atomic_queue", "mode": "throughput", "payload_bytes": 32, "messages": 10000000, "warmup_messages": 0, "callback_iterations": 64, "verify_payload": true, "prepared_input": false, "variable_payload": true, "prepared_input_limit_bytes": 268435456, "measure_callback_time": false, "producer_interval_ns": 0, "source_block_size": 4096, "source_pool_min": 4, "source_pool_max": 4, "source_queue_capacity": 16, "writer_backpressure": "drop", "writer_spin_count": 1000, "writer_wait_timeout_ms": 5000, "output_block_size": 4096, "output_frame_capacity": 4, "output_pool_min": 65536, "output_pool_max": 65536, "output_queue_capacity": 65538, "cancel_claim_mode": "tail", "output_mode": "spsc", "output_reader_mode": "wait_signal", "output_reader_count": 1, "output_retry_wait_us": 1000, "output_enable_stats": false, "is_scan_current": false, "reader_spin_count": 1000, "rescan_interval_ns": 1000000, "rescan_max_interval_ns": 1000000, "consumer_cpu": -1, "producer_cpu": -1, "producer_qos": "user_interactive", "round_storage_bytes": 214748320, "fixed_round_boundaries": true, "spsc_buffer_bytes": 268435456, "prefault_producer_buffers": true, "finish_timeout_ms": 120000, "work_wait_min_ms": 1, "finish_retry_ms": 1, "publish_count": 4294967295, "use_write_session": false, "rigtorp_write_prefetch": true, "readerwriterqueue_copy_after_zero": false, "spsc_capacity": 8388608, "retry_yield_every": 1024, "spsc_idle_spins": 2000, "spsc_idle_sleep_ns": 10000, "timer": "auto", "sample_every": 256, "max_samples": 100000, "latency_batch_size": 1000, "timer_calibration_samples": 16384, "call_batch_size": 256, "random_seed": 42, "timeout_seconds": 900, "buffer_budget_bytes": 536870912 } }, "build": { "BRQ_ENABLE_POOL_DEPTH_STATS": "OFF", "CMAKE_BUILD_TYPE": "Release", "CMAKE_CXX_COMPILER": "/opt/homebrew/opt/llvm@18/bin/clang++", "CMAKE_CXX_FLAGS": "", "CMAKE_CXX_FLAGS_RELEASE": "-O3 -DNDEBUG", "CMAKE_CXX_COMPILER_ID": "Clang", "CMAKE_CXX_COMPILER_VERSION": "18.1.8" }, "benchmark_parameters": { "source_pool_bytes": 16384, "business_accesses": 8, "warm_queries": 512, "query_group": 16, "query_groups": 4, "target_percent": 80, "setup_timeout_ms": 3000, "prefill": true }, "measurement_scope": "1MiB tail; retry strategies compared under the same fixed workload" }, "verified": true, "rows": [ { "queue": "TwoBufQueue_yield1024", "per_run": [ { "queue": "TwoBufQueue_yield1024", "run": 1, "samples": 10000, "before_ns": 14.46458333332224, "p50": 15.625, "p99": 109.375, "p999": 377.604166667, "write_ms": 345.86933333334053, "bp_percent": 0.017545166015625 }, { "queue": "TwoBufQueue_yield1024", "run": 2, "samples": 10000, "before_ns": 14.84999999998928, "p50": 15.625, "p99": 98.9583333333, "p999": 291.666666667, "write_ms": 332.48412499999307, "bp_percent": 0.013189697265625 }, { "queue": "TwoBufQueue_yield1024", "run": 3, "samples": 10000, "before_ns": 14.679166666655961, "p50": 15.625, "p99": 140.625, "p999": 872.395833333, "write_ms": 416.6512916667625, "bp_percent": 0.031781005859374996 } ], "before_ns": 14.664583333322494, "p50": 15.625, "p99": 116.31944444443333, "p999": 513.888888889, "write_ms": 365.0015833333654, "bp_percent": 0.020838623046874998 }, { "queue": "TwoBufQueue_yield0", "per_run": [ { "queue": "TwoBufQueue_yield0", "run": 1, "samples": 10000, "before_ns": 14.613541666656241, "p50": 15.625, "p99": 96.3541666667, "p999": 174.479166667, "write_ms": 341.6935416666763, "bp_percent": 0.025716552734375002 }, { "queue": "TwoBufQueue_yield0", "run": 2, "samples": 10000, "before_ns": 15.2927083333238, "p50": 20.8333333333, "p99": 117.1875, "p999": 718.75, "write_ms": 383.39629166669, "bp_percent": 0.043779296875 }, { "queue": "TwoBufQueue_yield0", "run": 3, "samples": 10000, "before_ns": 14.7249999999884, "p50": 15.625, "p99": 98.9583333333, "p999": 151.041666667, "write_ms": 327.575999999977, "bp_percent": 0.013990478515624998 } ], "before_ns": 14.877083333322814, "p50": 17.3611111111, "p99": 104.16666666666667, "p999": 348.090277778, "write_ms": 350.8886111111144, "bp_percent": 0.027828776041666666 }, { "queue": "TwoBufQueue_yield65536", "per_run": [ { "queue": "TwoBufQueue_yield65536", "run": 1, "samples": 10000, "before_ns": 14.52812499998928, "p50": 15.625, "p99": 106.770833333, "p999": 481.770833333, "write_ms": 344.4458333333438, "bp_percent": 0.015026855468750001 }, { "queue": "TwoBufQueue_yield65536", "run": 2, "samples": 10000, "before_ns": 15.01354166665644, "p50": 15.625, "p99": 114.583333333, "p999": 664.0625, "write_ms": 392.0012916666472, "bp_percent": 0.028759765625 }, { "queue": "TwoBufQueue_yield65536", "run": 3, "samples": 10000, "before_ns": 14.423958333322, "p50": 15.625, "p99": 104.166666667, "p999": 289.0625, "write_ms": 334.71512499999295, "bp_percent": 0.012691650390625002 } ], "before_ns": 14.655208333322573, "p50": 15.625, "p99": 108.50694444433333, "p999": 478.298611111, "write_ms": 357.054083333328, "bp_percent": 0.018826090494791666 }, { "queue": "ReaderWriterQueue", "per_run": [ { "queue": "ReaderWriterQueue", "run": 1, "samples": 10000, "before_ns": 15.1593749999886, "p50": 23.4375, "p99": 130.208333333, "p999": 718.75, "write_ms": 2658.5720833333503, "bp_percent": 0.0 }, { "queue": "ReaderWriterQueue", "run": 2, "samples": 10000, "before_ns": 13.87812499998668, "p50": 23.4375, "p99": 67.7083333333, "p999": 382.8125, "write_ms": 2928.9801666667295, "bp_percent": 0.0 }, { "queue": "ReaderWriterQueue", "run": 3, "samples": 10000, "before_ns": 13.7281249999856, "p50": 23.4375, "p99": 67.7083333333, "p999": 166.666666667, "write_ms": 2963.7682499998714, "bp_percent": 0.0 } ], "before_ns": 14.255208333320294, "p50": 23.4375, "p99": 88.54166666653335, "p999": 422.7430555556667, "write_ms": 2850.4401666666504, "bp_percent": 0.0 }, { "queue": "rigtorp", "per_run": [ { "queue": "rigtorp", "run": 1, "samples": 10000, "before_ns": 13.84999999998544, "p50": 13.0208333333, "p99": 65.1041666667, "p999": 119.791666667, "write_ms": 4340.529125000086, "bp_percent": 0.0 }, { "queue": "rigtorp", "run": 2, "samples": 10000, "before_ns": 13.9385416666524, "p50": 13.0208333333, "p99": 75.5208333333, "p999": 289.0625, "write_ms": 4308.182208333193, "bp_percent": 0.0 }, { "queue": "rigtorp", "run": 3, "samples": 10000, "before_ns": 13.983333333318841, "p50": 13.0208333333, "p99": 88.5416666667, "p999": 335.9375, "write_ms": 4276.465541666649, "bp_percent": 0.0 } ], "before_ns": 13.923958333318893, "p50": 13.0208333333, "p99": 76.3888888889, "p999": 248.263888889, "write_ms": 4308.392291666642, "bp_percent": 0.0 }, { "queue": "atomic_queue", "per_run": [ { "queue": "atomic_queue", "run": 1, "samples": 10000, "before_ns": 14.18020833332044, "p50": 36.4583333333, "p99": 67.7083333333, "p999": 161.458333333, "write_ms": 534.80295833333, "bp_percent": 0.0 }, { "queue": "atomic_queue", "run": 2, "samples": 10000, "before_ns": 14.34999999998736, "p50": 39.0625, "p99": 96.3541666667, "p999": 531.25, "write_ms": 574.6475000000029, "bp_percent": 0.0 }, { "queue": "atomic_queue", "run": 3, "samples": 10000, "before_ns": 13.80104166665208, "p50": 39.0625, "p99": 65.1041666667, "p999": 111.979166667, "write_ms": 525.8597083333368, "bp_percent": 0.0 } ], "before_ns": 14.110416666653293, "p50": 38.19444444443333, "p99": 76.3888888889, "p999": 268.2291666666667, "write_ms": 545.1033888888899, "bp_percent": 0.0 } ], "business_checksum": 7513227326176402639 }