Adding command line version of linpack benchmark.

wlauto/workloads/linpack_cli/LICENSE

@@ -0,0 +1,6 @@
+The source for the linpack binaries included with this workload may 
+be viewed here:
+
+http://www.netlib.org/benchmark/linpackc.new
+
+This code is in the public domain.

wlauto/workloads/linpack_cli/__init__.py

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+#    Copyright 2015 ARM Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# pylint: disable=attribute-defined-outside-init
+import os
+
+from wlauto import Workload, Parameter, Executable
+
+
+class LinpackCliWorkload(Workload):
+
+    name = 'linpack-cli'
+    description = """
+    linpack benchmark with a command line interface
+
+    Benchmarks FLOPS (floating point operations per second).
+
+    This is the oldschool version of the bencmark. Source may be viewed here:
+
+        http://www.netlib.org/benchmark/linpackc.new
+
+    """
+
+    parameters = [
+        Parameter('array_size', kind=int, default=200,
+                  description='size of arrays to be used by the benchmark.'),
+    ]
+
+    binary = None  # set during initialization
+
+    def initialize(self, context):
+        host_exe = context.resolver.get(Executable(self, self.device.abi, 'linpack'))
+        LinpackCliWorkload.binary = self.device.install(host_exe)
+
+    def setup(self, context):
+        self.command = '(echo {}; echo q) | {}'.format(self.array_size, self.binary)
+
+    def run(self, context):
+        self.raw_output = self.device.execute(self.command, timeout=300, check_exit_code=False)
+
+    def update_result(self, context):
+        raw_outfile = os.path.join(context.output_directory, 'linpack-raw.txt')
+        with open(raw_outfile, 'w') as wfh:
+            wfh.write(self.raw_output)
+        context.add_artifact('linpack-raw', raw_outfile, kind='raw')
+
+        marker = '--------------------'
+        lines = iter(self.raw_output.split('\n'))
+        for line in lines:
+            if marker in line:
+                break
+
+        for line in lines:
+            line = line.strip()
+            if not line:
+                break
+            parts = line.split()
+            classifiers = {'reps': int(parts[0])}
+            context.add_metric('time', float(parts[1]), 'seconds',
+                               lower_is_better=True, classifiers=classifiers)
+            context.add_metric('KFLOPS', float(parts[5]), 'KFLOPS',
+                               lower_is_better=True, classifiers=classifiers)
+
+    def finalize(self, context):
+        self.device.uninstall(self.binary)