From 51aa7e4a0392d5e8f98bd7a4d09f4026dd21bd0a Mon Sep 17 00:00:00 2001
From: Prakash Ramrakhyani <Prakash.Ramrakhyani@arm.com>
Date: Mon, 9 Jan 2012 18:08:20 -0600
Subject: sim: Enable sampling of run-time for code-sections marked using
 pseudo insts.

This patch adds a mechanism to collect run time samples for specific portions
of a benchmark, using work_begin and work_end pseudo instructions.It also enhances
the histogram stat to report geometric mean.
---
 src/base/stats/info.hh | 1 +
 src/base/stats/text.cc | 6 ++++++
 2 files changed, 7 insertions(+)

(limited to 'src/base/stats')

diff --git a/src/base/stats/info.hh b/src/base/stats/info.hh
index 2c5b44a38..98e811747 100644
--- a/src/base/stats/info.hh
+++ b/src/base/stats/info.hh
@@ -183,6 +183,7 @@ struct DistData
     VCounter cvec;
     Counter sum;
     Counter squares;
+    Counter logs;
     Counter samples;
 };
 
diff --git a/src/base/stats/text.cc b/src/base/stats/text.cc
index 683ba7fe4..4cf98ca9e 100644
--- a/src/base/stats/text.cc
+++ b/src/base/stats/text.cc
@@ -367,6 +367,12 @@ DistPrint::operator()(ostream &stream) const
     print.value = data.samples ? data.sum / data.samples : NAN;
     print(stream);
 
+    if (data.type == Hist) {
+        print.name = base + "gmean";
+        print.value = data.samples ? exp(data.logs / data.samples) : NAN;
+        print(stream);
+    }
+
     Result stdev = NAN;
     if (data.samples)
         stdev = sqrt((data.samples * data.squares - data.sum * data.sum) /
-- 
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