Extend lmbench scenario to measure memory bandwidth

Lmbench scenario has now two scripts and will choose between them,
based on whether the intention is to run memory latency or bandwidth
tests. Added also unit test file for this scenario.

JIRA: YARDSTICK-113

Change-Id: I2ba4dbef31f3cafbdb3c583ece5ed9512a906896
Signed-off-by: Kristian Hunt <kristian.hunt@gmail.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/yardstick/benchmark/scenarios/compute/lmbench_latency_benchmark.bash b/yardstick/benchmark/scenarios/compute/lmbench_latency_benchmark.bash
new file mode 100644
index 000000000..04e3c1a9d
--- /dev/null
+++ b/yardstick/benchmark/scenarios/compute/lmbench_latency_benchmark.bash
@@ -0,0 +1,41 @@
+#!/bin/bash
+
+##############################################################################
+# Copyright (c) 2015 Ericsson AB and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+
+# Run a lmbench read memory latency benchmark in a host and
+# outputs in json format the array sizes in megabytes and
+# load latency over all points in that array in nanosecods
+
+set -e
+
+SIZE=$1
+shift
+STRIDE=$1
+
+# write the result to stdout in json format
+output_json()
+{
+    iter=0
+    echo [
+    while read DATA
+    do
+        if [ $iter -gt 1 ] && [ -n "$DATA" ]; then
+            echo ,
+        fi
+
+        echo -n $DATA | awk '/ /{printf "{\"size\": %s, \"latency\": %s}", $1, $2}'
+
+        iter=$((iter+1))
+    done
+    echo ]
+}
+
+/usr/lib/lmbench/bin/x86_64-linux-gnu/lat_mem_rd $SIZE $STRIDE 2>&1 | output_json
+