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tensor: Assert minimum response queue depth with doc

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This commit is contained in:
Hansung Kim
2024-10-18 23:11:19 -07:00
parent e946403d78
commit b3c328b1be
1 changed files with 8 additions and 1 deletions
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9
src/main/scala/radiance/core/TensorCoreDecoupled.scala
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@@ -272,7 +272,13 @@ class TensorCoreDecoupled(
// //
// Backend of the decoupled access/execute pipeline. // Backend of the decoupled access/execute pipeline.
// //
val respQueueDepth = 2 // FIXME: parameterize val respQueueDepth = 4 // FIXME: parameterize
require(respQueueDepth >= 4,
"respQueueDepth must be at least 4. This is because the B operand buffer " ++
"is shallower than A's, so the B response queue has to be deep enough to " ++
"hold younger requests until A operand buffer becomes valid and the first DPU " ++
"fire can happen. FIXME: make operand buffer report per-subtile valid so " ++
"the first compute can happen earlier.")
val respQueueA = Queue(respATagged, respQueueDepth) val respQueueA = Queue(respATagged, respQueueDepth)
val respQueueB = Queue(respBTagged, respQueueDepth) val respQueueB = Queue(respBTagged, respQueueDepth)
@@ -547,6 +553,7 @@ class FillBuffer[T <: Data](
val data = Reg(Vec(entries, gen)) val data = Reg(Vec(entries, gen))
val ptr = Counter(entries + 1) val ptr = Counter(entries + 1)
dontTouch(ptr.value)
val full = (ptr.value === entries.U) val full = (ptr.value === entries.U)
io.enq.ready := !full io.enq.ready := !full
when (io.enq.fire) { when (io.enq.fire) {