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Add perf counters for smem/dmem latency

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This commit is contained in:
Hansung Kim
2024-03-04 21:10:19 -08:00
parent b3a9207136
commit 0fa2712897
1 changed files with 44 additions and 0 deletions
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44
src/main/scala/radiance/tile/RadianceTile.scala
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@@ -617,6 +617,28 @@ class RadianceTileModuleImp(outer: RadianceTile)
}
core.io.dmem_d_valid := dmem_d_valid_vec.asUInt
// performance counters
val pendingReqsCumulative = RegInit(UInt(32.W), 0.U)
val totalReqs = RegInit(UInt(32.W), 0.U)
val reqFireCountPerCycle = PopCount(dmemTLAdapters.map(_.io.inReq.fire))
val respFireCountPerCycle = PopCount(dmemTLAdapters.map(_.io.inResp.fire))
totalReqs := totalReqs + reqFireCountPerCycle
val pendingReqsPerCycle = reqFireCountPerCycle - respFireCountPerCycle
pendingReqsCumulative := pendingReqsCumulative + pendingReqsPerCycle
val prevFinished = RegNext(core.io.finished)
val justFinished = !prevFinished && core.io.finished
when (justFinished) {
printf("PERF: dmem: pending requests cumulative: %d\n", pendingReqsCumulative)
printf("PERF: dmem: total requests: %d\n", totalReqs)
}
dontTouch(totalReqs)
dontTouch(pendingReqsCumulative)
// now connect TL adapter downstream ports to the tile egress ports
(dmemTLAdapters zip dmemTLBundles) foreach { case (tlAdapter, tlOut) =>
tlOut.a <> tlAdapter.io.outReq
tlAdapter.io.outResp <> tlOut.d
@@ -666,6 +688,28 @@ class RadianceTileModuleImp(outer: RadianceTile)
tlAdapter.io.inResp.ready := core.io.smem_d_ready(i)
}
// performance counters
val pendingReqsCumulative = RegInit(UInt(32.W), 0.U)
val totalReqs = RegInit(UInt(32.W), 0.U)
val reqFireCountPerCycle = PopCount(smemTLAdapters.map(_.io.inReq.fire))
val respFireCountPerCycle = PopCount(smemTLAdapters.map(_.io.inResp.fire))
totalReqs := totalReqs + reqFireCountPerCycle
val pendingReqsPerCycle = reqFireCountPerCycle - respFireCountPerCycle
pendingReqsCumulative := pendingReqsCumulative + pendingReqsPerCycle
val prevFinished = RegNext(core.io.finished)
val justFinished = !prevFinished && core.io.finished
when (justFinished) {
printf("PERF: smem: pending requests cumulative: %d\n", pendingReqsCumulative)
printf("PERF: smem: total requests: %d\n", totalReqs)
}
dontTouch(totalReqs)
dontTouch(pendingReqsCumulative)
// now connect TL adapter downstream ports to the tile egress ports
(smemTLAdapters zip smemTLBundles) foreach { case (tlAdapter, tlOut) =>
tlOut.a <> tlAdapter.io.outReq
tlAdapter.io.outResp <> tlOut.d