Benchmarks & Validation

📊 Benchmarks & Validation

GRANITE v0.6.8 | ← Architecture Overview | CHANGELOG Summary →

Full data from docs/BENCHMARKS.md

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Hardware

All results from: Intel i5-8400 (6 cores), 16 GB DDR4, WSL2 Ubuntu 22.04, GCC 11.4 (-O3 -march=native), OpenMPI 4.1.2, 6 OMP threads.

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1. Single Puncture — Schwarzschild Stability

Tests CCZ4 moving-puncture evolution. BL initial data. Copy BCs. ko_sigma=0.1. kappa1=0.02.

64³ (dx_base = 1.5M, dx_finest = 0.1875M, domain ±48M, t=500M)

Quantity	Value
‖H‖₂ at t = 0.75M	1.083 × 10⁻²
‖H‖₂ at t = 500M	1.277 × 10⁻⁴
Reduction	×84.8
NaN events	0
Wall time	~497 min
Throughput	0.017 M/s

128³ (dx_base = 0.75M, dx_finest = 0.09375M, domain ±48M, t=120M)

Quantity	Value
‖H‖₂ at t = 0.375M	1.855 × 10⁻²
‖H‖₂ at t = 120M	1.039 × 10⁻³
Reduction	×17.9
NaN events	0

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2. Binary Black Hole Inspiral — B2_eq

Equal-mass BBH. Two-Punctures. Sommerfeld BCs. p_t = ±0.0840 (d=10M). ko_sigma=0.1.

64³ (dx_finest = 0.781M, domain ±200M, t=500M)

step	t [M]	α_center	‖H‖₂	Blocks
2	3.125	0.81207	4.929e-04	3
4	6.250	0.86547	8.226e-04	4
32	50.00	0.96214	1.571e-04	4
64	100.0	0.96668	7.540e-05	4
128	200.0	0.96656	4.095e-05	4
256	400.0	0.97264	1.960e-05	4
320	500.0	0.96748	1.341e-05	4

‖H‖₂ reduction: ×61.3 | NaN events: 0 | Wall time: 98.9 min | Throughput: 0.0843 M/s

96³ (dx_finest = 0.521M, domain ±200M, t=500M)

step	t [M]	‖H‖₂	Blocks
4	4.167	2.385e-03 (peak)	4
60	62.50	1.682e-04	4
200	208.3	5.180e-05	4
480	500.0	3.538e-05	4

‖H‖₂ reduction: ×67.4 | NaN events: 0 | Wall time: 496 min

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3. Reproducing These Results

git clone https://github.com/LiranOG/Granite-NR.git && cd Granite-NR
python3 scripts/run_granite.py build
python3 scripts/health_check.py

# Single puncture — 64³, t=500M
python3 scripts/run_granite.py run --benchmark single_puncture

# BBH — 64³, t=500M (~99 min)
python3 scripts/run_granite.py run --benchmark B2_eq

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4. Throughput & HPC Projections

Platform	Cores	Config	Throughput	t=500M wall time
i5-8400 desktop	6	BBH 64³	0.084 M/s	~99 min
i5-8400 desktop	6	BBH 96³	0.017 M/s	~496 min
2× Xeon Gold (128 cores)	128	BBH 128³	~1.4 M/s (proj.)	~6 min (proj.)
H100 SXM (post GPU)	—	BBH 256³	~50 M/s (proj.)	<10 sec (proj.)

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5. Validation Test Suite

Defined in benchmarks/validation_tests.yaml:

Test	Pass Criterion	Status
gauge_wave	4th-order convergence; amplitude drift < 1e-6	Config exists; no results yet
single_puncture	horizon mass drift < 1e-4	✅ Validated
binary_equal_mass	phase error < 0.01 rad vs. SXS:BBH:0001	🔶 Planned v0.7
balsara_1 shock tube	L₁ error < 1e-3	✅ Unit test passes
magnetic_rotor	∇·B < 1e-14	✅ Unit test passes
radiative_shock_tube	M1 vs. analytic L₂ error < 2%	⚪ M1 not active yet

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See also: Scientific Context | HPC Deployment

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