File size: 10,084 Bytes
e4cdd5f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 | """Tests for the compiler: CSR placement, pool allocation, multicast routing."""
import pytest
import sys, os
sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
import neurocore as nc
from neurocore.compiler import Compiler
from neurocore.exceptions import (
PoolOverflowError, RouteOverflowError, PlacementError, NetworkTooLargeError,
)
from neurocore.constants import NEURONS_PER_CORE, POOL_DEPTH, ROUTE_FANOUT
class TestPlacement:
def test_single_core(self):
net = nc.Network()
net.population(100)
c = Compiler()
compiled = c.compile(net)
assert compiled.placement.num_cores_used == 1
def test_two_cores(self):
net = nc.Network()
# P13: 1024 neurons/core, so need >1024 for 2 cores
net.population(1025)
c = Compiler()
compiled = c.compile(net)
assert compiled.placement.num_cores_used == 2
def test_exact_core_boundary(self):
net = nc.Network()
net.population(NEURONS_PER_CORE) # exactly 1024
c = Compiler()
compiled = c.compile(net)
assert compiled.placement.num_cores_used == 1
def test_multiple_populations(self):
net = nc.Network()
net.population(800)
net.population(400)
c = Compiler()
compiled = c.compile(net)
# 800 + 400 = 1200 => 2 cores (1024 + 176)
assert compiled.placement.num_cores_used == 2
assert compiled.placement.total_neurons == 1200
def test_too_many_neurons(self):
net = nc.Network()
net.population(128 * NEURONS_PER_CORE + 1)
c = Compiler()
with pytest.raises(NetworkTooLargeError):
c.compile(net)
class TestCSRPool:
"""Tests for CSR (Compressed Sparse Row) pool allocation."""
def test_pool_entries_generated(self):
"""Intra-core connections generate pool entries."""
net = nc.Network()
a = net.population(4)
b = net.population(4)
net.connect(a, b, topology="all_to_all", weight=200)
c = Compiler()
compiled = c.compile(net)
# 4 * 4 = 16 pool entries
assert len(compiled.prog_pool_cmds) == 16
assert len(compiled.prog_route_cmds) == 0
def test_index_entries_generated(self):
"""Each source neuron with connections gets an index entry."""
net = nc.Network()
a = net.population(4)
b = net.population(4)
net.connect(a, b, topology="all_to_all", weight=200)
c = Compiler()
compiled = c.compile(net)
# 4 source neurons, each connects to 4 targets
assert len(compiled.prog_index_cmds) == 4
# Check first index entry
idx0 = compiled.prog_index_cmds[0]
assert idx0["count"] == 4
assert idx0["base_addr"] == 0
def test_bump_allocator_contiguous(self):
"""Pool addresses should be contiguous per core."""
net = nc.Network()
a = net.population(3)
b = net.population(6)
net.connect(a, b, topology="all_to_all", weight=100)
c = Compiler()
compiled = c.compile(net)
# 3 source neurons, each with 6 connections = 18 pool entries
assert len(compiled.prog_pool_cmds) == 18
# Check addresses are contiguous
addrs = [cmd["pool_addr"] for cmd in compiled.prog_pool_cmds]
assert addrs == list(range(18))
def test_variable_fanout(self):
"""Different source neurons can have different connection counts."""
net = nc.Network()
src1 = net.population(1)
src2 = net.population(1)
tgt_small = net.population(5)
tgt_large = net.population(10)
net.connect(src1, tgt_small, topology="all_to_all", weight=100)
net.connect(src2, tgt_large, topology="all_to_all", weight=100)
c = Compiler()
compiled = c.compile(net)
counts = sorted([cmd["count"] for cmd in compiled.prog_index_cmds])
assert counts == [5, 10]
def test_high_fanout_no_error(self):
"""With CSR pool, >32 connections per source is now allowed."""
net = nc.Network()
src = net.population(1)
tgt = net.population(100)
net.connect(src, tgt, topology="all_to_all", weight=100)
c = Compiler()
# This used to raise FanoutOverflowError with fixed slots!
compiled = c.compile(net)
assert len(compiled.prog_pool_cmds) == 100
def test_pool_overflow(self):
"""Exceeding POOL_DEPTH per core should raise PoolOverflowError."""
net = nc.Network()
src = net.population(200)
net.connect(src, src, topology="all_to_all", weight=100)
c = Compiler()
with pytest.raises(PoolOverflowError):
c.compile(net)
def test_legacy_prog_conn_alias(self):
"""prog_conn_cmds property should alias prog_pool_cmds."""
net = nc.Network()
a = net.population(2)
b = net.population(2)
net.connect(a, b, topology="all_to_all", weight=200)
c = Compiler()
compiled = c.compile(net)
assert compiled.prog_conn_cmds is compiled.prog_pool_cmds
class TestMulticastRouting:
"""Tests for P13b multicast inter-core routing."""
def test_single_route(self):
"""One inter-core route per source should work."""
net = nc.Network()
a = net.population(NEURONS_PER_CORE) # fills core 0
b = net.population(1) # on core 1
net.connect(a, b, topology="all_to_all", weight=200)
c = Compiler()
compiled = c.compile(net)
# 1024 sources, each with 1 route to b[0] on core 1
assert len(compiled.prog_route_cmds) == NEURONS_PER_CORE
# Each route should have slot=0
assert all(cmd["slot"] == 0 for cmd in compiled.prog_route_cmds)
def test_multicast_two_destinations(self):
"""One source routing to 2 targets on another core (2 route slots)."""
net = nc.Network()
# src fills entire core 0 — targets MUST go elsewhere
src = net.population(NEURONS_PER_CORE)
tgt1 = net.population(1) # core 1 neuron 0
tgt2 = net.population(1) # core 1 neuron 1
net.connect(src, tgt1, topology="all_to_all", weight=200)
net.connect(src, tgt2, topology="all_to_all", weight=200)
comp = Compiler()
compiled = comp.compile(net)
# src neuron 0 should have 2 multicast route slots (to tgt1 and tgt2)
src_core, src_neuron = compiled.placement.neuron_map[(src.id, 0)]
routes_for_src0 = [r for r in compiled.prog_route_cmds
if r["src_neuron"] == src_neuron and r["src_core"] == src_core]
assert len(routes_for_src0) == 2
slots = sorted(r["slot"] for r in routes_for_src0)
assert slots == [0, 1]
def test_multicast_8_way(self):
"""Max 8 multicast destinations should work."""
net = nc.Network()
# src fills core 0
src = net.population(NEURONS_PER_CORE)
targets = []
for _ in range(8):
targets.append(net.population(1))
for t in targets:
net.connect(src, t, topology="all_to_all", weight=100)
comp = Compiler()
compiled = comp.compile(net)
src_core, src_neuron = compiled.placement.neuron_map[(src.id, 0)]
routes_for_src0 = [r for r in compiled.prog_route_cmds
if r["src_neuron"] == src_neuron and r["src_core"] == src_core]
assert len(routes_for_src0) == 8
def test_multicast_overflow(self):
"""More than ROUTE_FANOUT unique destinations should raise RouteOverflowError."""
net = nc.Network()
# src fills core 0
src = net.population(NEURONS_PER_CORE)
targets = []
for _ in range(ROUTE_FANOUT + 1): # 9 unique destinations
targets.append(net.population(1))
for t in targets:
net.connect(src, t, topology="all_to_all", weight=100)
comp = Compiler()
with pytest.raises(RouteOverflowError):
comp.compile(net)
def test_route_deduplication(self):
"""Multiple connections to same (dest_core, dest_neuron) use 1 route slot."""
net = nc.Network()
a = net.population(NEURONS_PER_CORE) # fills core 0
b = net.population(1) # core 1
# Connect entire a -> b (all 1024 source neurons to 1 target)
# Each source gets 1 route to the same (core 1, neuron 0)
net.connect(a, b, topology="all_to_all", weight=200)
# Connect again with different weight — but same source->dest pairs
net.connect(a, b, topology="all_to_all", weight=300)
comp = Compiler()
compiled = comp.compile(net)
# For neuron 0 of core 0, should have only 1 route (deduplicated)
routes_for_n0 = [r for r in compiled.prog_route_cmds
if r["src_neuron"] == 0 and r["src_core"] == 0]
assert len(routes_for_n0) == 1
class TestNeuronParams:
def test_non_default_params(self):
net = nc.Network()
net.population(4, params={"threshold": 800, "leak": 5})
c = Compiler()
compiled = c.compile(net)
# 4 neurons * 2 non-default params = 8 commands
assert len(compiled.prog_neuron_cmds) == 8
def test_default_params_no_commands(self):
net = nc.Network()
net.population(4) # all defaults
c = Compiler()
compiled = c.compile(net)
assert len(compiled.prog_neuron_cmds) == 0
class TestCompiledSummary:
def test_summary(self, small_network):
net, _, _ = small_network
c = Compiler()
compiled = c.compile(net)
s = compiled.summary()
assert "pool entries" in s
assert "inter-core" in s
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