Version bump.

get_installed() looks in self.executables_directory for the binary. This
may not exist on a target (this is created when setup() is invoked).
This commit updated get_installed() to check whether target_directory
exists first, avoiding the error.

devlib/module/cpufreq.py

@@ -363,3 +363,16 @@ class CpufreqModule(Module):
                 "done"\
                 .format(governor), as_root=True)
 
+    def trace_frequencies(self):
+        """
+        Report current frequencies on trace file
+        """
+        self.target.execute(
+                'FREQS=$(cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq); '
+                'CPU=0; for F in $FREQS; do '
+                '   echo "cpu_frequency:        state=$F cpu_id=$CPU" > /sys/kernel/debug/tracing/trace_marker; '
+                '   let CPU++; '
+                'done',
+                as_root=True
+        )
+

devlib/target.py

@@ -176,6 +176,7 @@ class Target(object):
         self.platform.init_target_connection(self)
         tid = id(threading.current_thread())
         self._connections[tid] = self.get_connection(timeout=timeout)
+        self._resolve_paths()
         self.busybox = self.get_installed('busybox')
         self.platform.update_from_target(self)
         self._update_modules('connected')
@@ -401,8 +402,9 @@ class Target(object):
                     return self.path.join(path, name)
             except TargetError:
                 pass  # directory does not exist or no executable premssions
-        if name in self.list_directory(self.executables_directory):
-            return self.path.join(self.executables_directory, name)
+        if self.file_exists(self.executables_directory):
+            if name in self.list_directory(self.executables_directory):
+                return self.path.join(self.executables_directory, name)
 
     which = get_installed
 
@@ -437,6 +439,9 @@ class Target(object):
         else:
             self.logger.debug('Module {} is already installed.'.format(mod.name))
 
+    def _resolve_paths(self):
+        raise NotImplementedError()
+
 
 class LinuxTarget(Target):
 
@@ -473,13 +478,6 @@ class LinuxTarget(Target):
 
     def connect(self, timeout=None):
         super(LinuxTarget, self).connect(timeout=timeout)
-        if self.working_directory is None:
-            if self.connected_as_root:
-                self.working_directory = '/root/devlib-target'
-            else:
-                self.working_directory = '/home/{}/devlib-target'.format(self.user)
-        if self.executables_directory is None:
-            self.executables_directory = self.path.join(self.working_directory, 'bin')
 
     def kick_off(self, command, as_root=False):
         command = 'sh -c "{}" 1>/dev/null 2>/dev/null &'.format(escape_double_quotes(command))
@@ -547,6 +545,15 @@ class LinuxTarget(Target):
             message = e.message.split('OUTPUT:', 1)[1].strip()  # pylint: disable=no-member
             self.logger.debug('Could not take screenshot: {}'.format(message))
 
+    def _resolve_paths(self):
+        if self.working_directory is None:
+            if self.connected_as_root:
+                self.working_directory = '/root/devlib-target'
+            else:
+                self.working_directory = '/home/{}/devlib-target'.format(self.user)
+        if self.executables_directory is None:
+            self.executables_directory = self.path.join(self.working_directory, 'bin')
+
 
 class AndroidTarget(Target):
 
@@ -585,10 +592,6 @@ class AndroidTarget(Target):
             return (0, 0)
 
 
-    def __init__(self, *args, **kwargs):
-        super(AndroidTarget, self).__init__(*args, **kwargs)
-        self._file_transfer_cache = None
-
     def reset(self, fastboot=False):  # pylint: disable=arguments-differ
         try:
             self.execute('reboot {}'.format(fastboot and 'fastboot' or ''),
@@ -608,11 +611,6 @@ class AndroidTarget(Target):
             # always disconnect first.
             adb_disconnect(device)
         super(AndroidTarget, self).connect(timeout=timeout)
-        if self.working_directory is None:
-            self.working_directory = '/data/local/tmp/devlib-target'
-        self._file_transfer_cache = self.path.join(self.working_directory, '.file-cache')
-        if self.executables_directory is None:
-            self.executables_directory = self.path.join(self.working_directory, 'bin')
 
         if check_boot_completed:
             boot_completed = boolean(self.getprop('sys.boot_completed'))
@@ -793,6 +791,13 @@ class AndroidTarget(Target):
         if not self.is_screen_on():
             self.execute('input keyevent 26')
 
+    def _resolve_paths(self):
+        if self.working_directory is None:
+            self.working_directory = '/data/local/tmp/devlib-target'
+        self._file_transfer_cache = self.path.join(self.working_directory, '.file-cache')
+        if self.executables_directory is None:
+            self.executables_directory = self.path.join(self.working_directory, 'bin')
+
     def _ensure_executables_directory_is_writable(self):
         matched = []
         for entry in self.list_file_systems():
@@ -954,12 +959,11 @@ class LocalLinuxTarget(LinuxTarget):
 
     conn_cls = LocalConnection
 
-    def connect(self, timeout=None):
+    def _resolve_paths(self):
         if self.working_directory is None:
             self.working_directory = '/tmp'
         if self.executables_directory is None:
             self.executables_directory = '/tmp'
-        super(LocalLinuxTarget, self).connect(timeout)
 
 
 def _get_model_name(section):

devlib/trace/ftrace.py

@@ -101,8 +101,14 @@ class FtraceCollector(TraceCollector):
         if self.automark:
             self.mark_start()
         self.target.execute('{} start {}'.format(self.target_binary, self.event_string), as_root=True)
+        if 'cpufreq' in self.target.modules:
+            self.logger.debug('Trace CPUFreq frequencies')
+            self.target.cpufreq.trace_frequencies()
 
     def stop(self):
+        if 'cpufreq' in self.target.modules:
+            self.logger.debug('Trace CPUFreq frequencies')
+            self.target.cpufreq.trace_frequencies()
         self.stop_time = time.time()
         if self.automark:
             self.mark_stop()

setup.py

@@ -59,7 +59,7 @@ for root, dirs, files in os.walk(devlib_dir):
 params = dict(
     name='devlib',
     description='A framework for automating workload execution and measurment collection on ARM devices.',
-    version='0.0.1',
+    version='0.0.3',
     packages=packages,
     package_data=data_files,
     url='N/A',