klippy: Log the type of cpu the host is running on

Report in the log the host CPU type and count.  This helps distinguish
between different rpi versions when debugging the log from a problem
report.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

klippy/util.py

@@ -37,6 +37,21 @@ def create_pty(ptyname):
     termios.tcsetattr(mfd, termios.TCSADRAIN, old)
     return mfd
 
+def get_cpu_info():
+    try:
+        f = open('/proc/cpuinfo', 'rb')
+        data = f.read()
+        f.close()
+    except OSError:
+        logging.debug("Exception on read /proc/cpuinfo: %s" % (
+            traceback.format_exc(),))
+        return "?"
+    lines = [l.split(':', 1) for l in data.split('\n')]
+    lines = [(l[0].strip(), l[1].strip()) for l in lines if len(l) == 2]
+    core_count = [k for k, v in lines].count("processor")
+    model_name = dict(lines).get("model name", "?")
+    return "%d core %s" % (core_count, model_name)
+
 def get_git_version():
     # Obtain version info from "git" program
     gitdir = os.path.join(sys.path[0], '..', '.git')