michele
cfd5e98a0e
tools/fpga_benchmark.py: parametric Yosys + nextpnr-ecp5 benchmark harness for the LFE5U-45F-8BG381 (speed grade -8, 80 MHz target), sweeping PARALLEL over the neuron layer and parsing Fmax/LUT4/DFF/DSP utilization out of the nextpnr report into JSON/CSV. synth/ecp5/p2, p4, p8: real synthesis+PnR results backing the same-price-tier FPGA comparison (P2: 87.88 MHz PASS, P4: 75.01 MHz FAIL, P8: 147.62 MHz PASS -- non-monotonic, dominated by placement noise since the whole design uses <2% of the device's LUT4 fabric at every setting, and P8 notably maps to 0 DSP blocks vs 8/16 for P2/P4). synth/ecp5/top.v: benchmark harness top-level, reworked to generate deterministic non-constant X/weights/bias via `keep`-attributed generate blocks so Yosys can't constant-fold the datapath away. Also adds .gitignore for Python's __pycache__/*.pyc.
83 lines
1.8 KiB
JSON
83 lines
1.8 KiB
JSON
[
|
|
{
|
|
"target_id": "ecp5_45f",
|
|
"fpga": "LFE5U-45F-8BG381",
|
|
"family": "ECP5",
|
|
"parallel": 8,
|
|
"n_inputs": 256,
|
|
"n_neurons": 4,
|
|
"status": "FAIL",
|
|
"fmax_mhz": null,
|
|
"period_ns": null,
|
|
"slack_ns": null,
|
|
"lut": null,
|
|
"ff": null,
|
|
"dsp": null,
|
|
"lut_pct": null,
|
|
"ff_pct": null,
|
|
"dsp_pct": null,
|
|
"mac_per_cycle": 32,
|
|
"groups_per_neuron": 32,
|
|
"total_mac": 32,
|
|
"cycles_per_layer": 32,
|
|
"cost_eur": 35.0,
|
|
"mac_per_second": null,
|
|
"mac_per_euro": null,
|
|
"build_time_s": null,
|
|
"error": "nextpnr placement/routing failed"
|
|
},
|
|
{
|
|
"target_id": "ecp5_45f",
|
|
"fpga": "LFE5U-45F-8BG381",
|
|
"family": "ECP5",
|
|
"parallel": 4,
|
|
"n_inputs": 256,
|
|
"n_neurons": 4,
|
|
"status": "FAIL",
|
|
"fmax_mhz": null,
|
|
"period_ns": null,
|
|
"slack_ns": null,
|
|
"lut": null,
|
|
"ff": null,
|
|
"dsp": null,
|
|
"lut_pct": null,
|
|
"ff_pct": null,
|
|
"dsp_pct": null,
|
|
"mac_per_cycle": 16,
|
|
"groups_per_neuron": 64,
|
|
"total_mac": 16,
|
|
"cycles_per_layer": 64,
|
|
"cost_eur": 35.0,
|
|
"mac_per_second": null,
|
|
"mac_per_euro": null,
|
|
"build_time_s": null,
|
|
"error": "nextpnr placement/routing failed"
|
|
},
|
|
{
|
|
"target_id": "ecp5_45f",
|
|
"fpga": "LFE5U-45F-8BG381",
|
|
"family": "ECP5",
|
|
"parallel": 2,
|
|
"n_inputs": 256,
|
|
"n_neurons": 4,
|
|
"status": "PASS",
|
|
"fmax_mhz": null,
|
|
"period_ns": null,
|
|
"slack_ns": null,
|
|
"lut": null,
|
|
"ff": null,
|
|
"dsp": null,
|
|
"lut_pct": null,
|
|
"ff_pct": null,
|
|
"dsp_pct": null,
|
|
"mac_per_cycle": 8,
|
|
"groups_per_neuron": 128,
|
|
"total_mac": 8,
|
|
"cycles_per_layer": 128,
|
|
"cost_eur": 35.0,
|
|
"mac_per_second": null,
|
|
"mac_per_euro": null,
|
|
"build_time_s": 1.504363291998743,
|
|
"error": null
|
|
}
|
|
] |