feat: Max pending jobs in prover node

[spalladino]

Adds a max number of pending block-proving jobs to the prover node. When reached, the prover node stops proving, and resumes once a job finishes. Also adds error handling to the creation of a new proving job, so if a block-proving-job fails to start, it is skipped instead of blocking the prover node.

[AztecBot]

Benchmark results

Metrics with a significant change:

• avm_simulation_time_ms (Token:transfer_public): 33.7 (+57%)

Detailed results

All benchmarks are run on txs on the Benchmarking contract on the repository. Each tx consists of a batch call to create_note and increment_balance, which guarantees that each tx has a private call, a nested private call, a public call, and a nested public call, as well as an emitted private note, an unencrypted log, and public storage read and write.

This benchmark source data is available in JSON format on S3 here.

Proof generation

Each column represents the number of threads used in proof generation.

Metric	1 threads	4 threads	16 threads	32 threads	64 threads
proof_construction_time_sha256_ms	5,770	1,561	706	779 (+6%)	773 (+1%)
proof_construction_time_sha256_30_ms	11,911	3,221	1,411	1,432	1,470
proof_construction_time_sha256_100_ms	45,459	12,268 (+2%)	5,440 (-1%)	5,406 (-1%)	5,372 (-1%)
proof_construction_time_poseidon_hash_ms	79.0	34.0	34.0	59.0 (+2%)	88.0 (+1%)
proof_construction_time_poseidon_hash_30_ms	1,533	423	204	225 (-1%)	277 (+3%)
proof_construction_time_poseidon_hash_100_ms	5,658	1,517 (-1%)	682 (+1%)	744 (+1%)	753

L2 block published to L1

Each column represents the number of txs on an L2 block published to L1.

Metric	4 txs	8 txs	16 txs
l1_rollup_calldata_size_in_bytes	4,324	7,844	14,852
l1_rollup_calldata_gas	49,708	92,296	177,620
l1_rollup_execution_gas	1,383,202	2,130,758	3,958,121
l2_block_processing_time_in_ms	259	449 (+1%)	812
l2_block_building_time_in_ms	9,229	18,061	35,998
l2_block_rollup_simulation_time_in_ms	9,228	18,060	35,997
l2_block_public_tx_process_time_in_ms	7,785	16,510	34,420

L2 chain processing

Each column represents the number of blocks on the L2 chain where each block has 8 txs.

Metric	3 blocks	5 blocks
node_history_sync_time_in_ms	2,958 (-1%)	3,820 (-1%)
node_database_size_in_bytes	12,603,472	16,752,720
pxe_database_size_in_bytes	16,254	26,813

Circuits stats

Stats on running time and I/O sizes collected for every kernel circuit run across all benchmarks.

Circuit	simulation_time_in_ms	witness_generation_time_in_ms	input_size_in_bytes	output_size_in_bytes	proving_time_in_ms
private-kernel-init	96.3 (-1%)	401 (+6%)	21,673	44,858	N/A
private-kernel-inner	162 (-1%)	756 (+12%)	72,309	45,005	N/A
private-kernel-reset-tiny	501	906 (+4%)	65,974	44,844	N/A
private-kernel-tail	206	170 (+7%)	50,728	52,256	N/A
base-parity	5.55 (+1%)	N/A	160	96.0	N/A
root-parity	34.2 (+2%)	N/A	69,084	96.0	N/A
base-rollup	2,835	N/A	187,817	664	N/A
root-rollup	39.0 (+1%)	N/A	54,525	716	N/A
public-kernel-setup	99.0 (+2%)	N/A	103,760	71,222	N/A
public-kernel-app-logic	103	N/A	103,599	71,222	N/A
public-kernel-tail	574	N/A	409,190	16,414	N/A
private-kernel-reset-small	492	N/A	66,085	45,629	N/A
private-kernel-tail-to-public	1,076 (-10%)	661 (+4%)	492,960	1,697	N/A
public-kernel-teardown	93.6 (+3%)	N/A	104,005	71,222	N/A
merge-rollup	19.5 (+2%)	N/A	35,742	664	N/A
undefined	N/A	N/A	N/A	N/A	65,476 (-3%)

Stats on running time collected for app circuits

Function	input_size_in_bytes	output_size_in_bytes	witness_generation_time_in_ms
ContractClassRegisterer:register	1,344	11,731	344 (+1%)
ContractInstanceDeployer:deploy	1,408	11,731	18.3
MultiCallEntrypoint:entrypoint	1,920	11,731	422
FeeJuice:deploy	1,376	11,731	388
SchnorrAccount:constructor	1,312	11,731	106 (+2%)
SchnorrAccount:entrypoint	2,304	11,731	433
Token:privately_mint_private_note	1,280	11,731	143 (+1%)
FPC:fee_entrypoint_public	1,344	11,731	28.8 (+8%)
Token:transfer	1,312	11,731	273 (-3%)
Benchmarking:create_note	1,344	11,731	104 (-1%)
SchnorrAccount:verify_private_authwit	1,280	11,731	27.6 (-4%)
Token:unshield	1,376	11,731	560 (-9%)
FPC:fee_entrypoint_private	1,376	11,731	828 (+2%)

AVM Simulation

Time to simulate various public functions in the AVM.

Function	time_ms	bytecode_size_in_bytes
FeeJuice:_increase_public_balance	53.3 (-6%)	8,139
FeeJuice:set_portal	9.36 (-11%)	2,362
Token:constructor	79.7 (-1%)	31,107
FPC:constructor	52.2	22,380
FeeJuice:mint_public	38.8 (-7%)	6,150
Token:mint_public	44.3 (-7%)	11,720
Token:assert_minter_and_mint	68.5 (-11%)	8,028
AuthRegistry:set_authorized	38.6 (-13%)	4,537
FPC:prepare_fee	240 (-1%)	8,812
Token:transfer_public	⚠️ 33.7 (+57%)	47,374
FPC:pay_refund	58.7 (+2%)	12,114
Benchmarking:increment_balance	965	7,450
Token:_increase_public_balance	39.7	8,960
FPC:pay_refund_with_shielded_rebate	65.2 (-1%)	12,663

Public DB Access

Time to access various public DBs.

Function	time_ms
get-nullifier-index	0.157 (-7%)

Tree insertion stats

The duration to insert a fixed batch of leaves into each tree type.

Metric	1 leaves	16 leaves	64 leaves	128 leaves	256 leaves	512 leaves	1024 leaves
batch_insert_into_append_only_tree_16_depth_ms	2.19	3.92	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_16_depth_hash_count	16.8	31.7	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_16_depth_hash_ms	0.114 (+1%)	0.111	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_32_depth_ms	N/A	N/A	11.6	17.8 (-5%)	31.2 (-1%)	60.0	112 (-1%)
batch_insert_into_append_only_tree_32_depth_hash_count	N/A	N/A	95.9	159	287	543	1,055
batch_insert_into_append_only_tree_32_depth_hash_ms	N/A	N/A	0.111 (+1%)	0.104 (-5%)	0.101 (-2%)	0.103	0.102
batch_insert_into_indexed_tree_20_depth_ms	N/A	N/A	14.5	26.2 (+1%)	44.1 (-2%)	84.2 (+2%)	162 (-1%)
batch_insert_into_indexed_tree_20_depth_hash_count	N/A	N/A	109	207	355	691	1,363
batch_insert_into_indexed_tree_20_depth_hash_ms	N/A	N/A	0.110	0.104	0.107 (-2%)	0.104 (+2%)	0.102 (-1%)
batch_insert_into_indexed_tree_40_depth_ms	N/A	N/A	16.6 (+1%)	N/A	N/A	N/A	N/A
batch_insert_into_indexed_tree_40_depth_hash_count	N/A	N/A	132	N/A	N/A	N/A	N/A
batch_insert_into_indexed_tree_40_depth_hash_ms	N/A	N/A	0.107 (+1%)	N/A	N/A	N/A	N/A

Miscellaneous

Transaction sizes based on how many contract classes are registered in the tx.

Metric	0 registered classes	1 registered classes
tx_size_in_bytes	64,779	668,997

Transaction size based on fee payment method

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