From 87c5d034f2d32132eed01a6f43b567af9b34cbcd Mon Sep 17 00:00:00 2001
From: Schuyler Eldridge
Date: Thu, 25 Jun 2020 16:10:25 -0400
Subject: Batch renames in LowerTypes (#1718)

* Batch renames in LowerTypes

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

* Add benchmarking for LowerTypes

Add infrastructure of benchmarking Transforms (in addition to
existing infra for Passes). Also run System.gc between each timed
benchmark to improve stability.

Co-authored-by: Jack Koenig <koenig@sifive.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>---
 .../firrtl/benchmark/hot/TransformBenchmark.scala  | 27 ++++++++++++++++++++++
 .../scala/firrtl/benchmark/hot/util/package.scala  |  1 +
 2 files changed, 28 insertions(+)
 create mode 100644 benchmark/src/main/scala/firrtl/benchmark/hot/TransformBenchmark.scala

(limited to 'benchmark/src')

diff --git a/benchmark/src/main/scala/firrtl/benchmark/hot/TransformBenchmark.scala b/benchmark/src/main/scala/firrtl/benchmark/hot/TransformBenchmark.scala
new file mode 100644
index 00000000..05b759c6
--- /dev/null
+++ b/benchmark/src/main/scala/firrtl/benchmark/hot/TransformBenchmark.scala
@@ -0,0 +1,27 @@
+// See LICENSE for license details.
+
+package firrtl
+package benchmark
+package hot
+
+import firrtl._
+import firrtl.passes.LowerTypes
+import firrtl.stage.TransformManager
+
+import firrtl.benchmark.util._
+
+abstract class TransformBenchmark(factory: () => Transform) extends App {
+  val inputFile = args(0)
+  val warmup = args(1).toInt
+  val runs = args(2).toInt
+
+  val input = filenameToCircuit(inputFile)
+  val inputState = CircuitState(input, ChirrtlForm)
+
+  val manager = new TransformManager(factory().prerequisites)
+  val preState = manager.execute(inputState)
+
+  hot.util.benchmark(warmup, runs)(factory().transform(preState))
+}
+
+object LowerTypesBenchmark extends TransformBenchmark(() => LowerTypes)
diff --git a/benchmark/src/main/scala/firrtl/benchmark/hot/util/package.scala b/benchmark/src/main/scala/firrtl/benchmark/hot/util/package.scala
index c05b8359..911bd03a 100644
--- a/benchmark/src/main/scala/firrtl/benchmark/hot/util/package.scala
+++ b/benchmark/src/main/scala/firrtl/benchmark/hot/util/package.scala
@@ -15,6 +15,7 @@ package object util {
     // Benchmark
     val times: Array[Double] = Array.fill(nRun)(0.0)
     for (i <- 0 until nRun) {
+      System.gc
       val (t, res) = time(f)
       times(i) = t
       println(f"Benchmark run $i took $t%.1f ms")
-- 
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