From 84521de728a5fa7b787ef07a539db154ac376c19 Mon Sep 17 00:00:00 2001
From: Lingrui98 <goulingrui19s@ict.ac.cn>
Date: Wed, 28 Jun 2023 20:38:39 +0800
Subject: [PATCH] calculate average for each histogram

---
 src/main/scala/utils/PerfCounterUtils.scala | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/main/scala/utils/PerfCounterUtils.scala b/src/main/scala/utils/PerfCounterUtils.scala
index d0b95d2ef..74cc5efe2 100644
--- a/src/main/scala/utils/PerfCounterUtils.scala
+++ b/src/main/scala/utils/PerfCounterUtils.scala
@@ -83,6 +83,20 @@ object XSPerfHistogram extends HasRegularPerfName {
       ExcitingUtils.addSink(perfClean, "XSPERF_CLEAN")
       ExcitingUtils.addSink(perfDump, "XSPERF_DUMP")
 
+      val sum = RegInit(0.U(64.W))
+      val nSamples = RegInit(0.U(64.W))
+      when (perfClean) {
+        sum := 0.U
+        nSamples := 0.U
+      } .elsewhen (enable) {
+        sum := sum + perfCnt
+        nSamples := nSamples + 1.U
+      }
+
+      when (perfDump) {
+        XSPerfPrint(p"${perfName}_mean, ${sum/nSamples}\n")
+      }
+      
       // drop each perfCnt value into a bin
       val nBins = (stop - start) / step
       require(start >= 0)
-- 
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