Record host platform information in benchmark data

run_benchmarks

@@ -388,7 +388,13 @@ def main():
         print()
 
     if args.save_json:
+        info_cmd = server_base + python + ['/usr/src/servers/platinfo.py']
+        print('  ' + ' '.join(info_cmd))
+        output = subprocess.check_output(info_cmd, universal_newlines=True)
+        platform_info = json.loads(output)
+
         benchmarks_data = {
+            'platform': platform_info,
             'concurrency_levels': args.concurrency_levels,
             'payload_size_levels': args.payload_size_levels,
             'benchmarks': benchmarks_data,

servers/platinfo.py

+import json
+import os.path
+import platform
+import warnings
+
+
+if __name__ == '__main__':
+    machine = platform.machine()
+    processor = platform.processor()
+    system = platform.system()
+
+    cpuinfo_f = '/proc/cpuinfo'
+
+    if (processor in {machine, 'unknown'} and os.path.exists(cpuinfo_f)):
+        with open(cpuinfo_f, 'rt') as f:
+            for line in f:
+                if line.startswith('model name'):
+                    _, _, p = line.partition(':')
+                    processor = p.strip()
+                    break
+
+    if 'Linux' in system:
+
+        with warnings.catch_warnings():
+            # see issue #1322 for more information
+            warnings.filterwarnings(
+                'ignore',
+                'dist\(\) and linux_distribution\(\) '
+                'functions are deprecated .*',
+                PendingDeprecationWarning,
+            )
+            distname, distversion, distid = platform.dist('')
+
+        distribution = '{} {}'.format(distname, distversion).strip()
+
+    else:
+        distribution = None
+
+    data = {
+        'cpu': processor,
+        'arch': machine,
+        'system': '{} {}'.format(system, platform.release()),
+        'distribution': distribution
+    }
+
+    print(json.dumps(data))