oeqa/qemurunner: Add priority/nice information for running processes

We're seeing failures due to system load. In theory we've set process
nice levels which should compensate for this. Add debugging so we can
find out if they're being correctly applied.

(From OE-Core rev: 1e4e345bba8216b9b5623682206a7dae7cad261c)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/utils/qemurunner.py

@@ -264,7 +264,7 @@ class QemuRunner:
                 % (self.runqemu.poll(), os.path.isfile(self.qemu_pidfile), str(qemu_pid), os.path.exists("/proc/" + str(qemu_pid))))
 
             # Dump all processes to help us to figure out what is going on...
-            ps = subprocess.Popen(['ps', 'axww', '-o', 'pid,ppid,command '], stdout=subprocess.PIPE).communicate()[0]
+            ps = subprocess.Popen(['ps', 'axww', '-o', 'pid,ppid,pri,ni,command '], stdout=subprocess.PIPE).communicate()[0]
             processes = ps.decode("utf-8")
             self.logger.debug("Running processes:\n%s" % processes)
             self._dump_host()

meta/lib/oeqa/utils/qemutinyrunner.py

@@ -138,7 +138,7 @@ class QemuTinyRunner(QemuRunner):
         #
         # Walk the process tree from the process specified looking for a qemu-system. Return its [pid'cmd]
         #
-        ps = subprocess.Popen(['ps', 'axww', '-o', 'pid,ppid,command'], stdout=subprocess.PIPE).communicate()[0]
+        ps = subprocess.Popen(['ps', 'axww', '-o', 'pid,ppid,pri,ni,command'], stdout=subprocess.PIPE).communicate()[0]
         processes = ps.decode("utf-8").split('\n')
         nfields = len(processes[0].split()) - 1
         pids = {}