runqemu: display host uptime when starting

In order to be able to debug issues on the host that have an impact on the
guest, it is useful to get the uptime of the host while starting so we can
match with the events in dmesg. Also include the uptime when cleaning up.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/scripts/runqemu b/scripts/runqemu
index b6fc212ebe208da532c02fb09d62e0c30dc44285..983f7514c7590522289792f46864ff370c1cc503 100755 (executable)
--- a/scripts/runqemu
+++ b/scripts/runqemu
@@ -1505,6 +1505,9 @@ class BaseConfig(object):
         cmd = "%s %s" % (self.qemu_opt, kernel_opts)
         cmds = shlex.split(cmd)
         logger.info('Running %s\n' % cmd)
+        with open('/proc/uptime', 'r') as f:
+            uptime_seconds = f.readline().split()[0]
+        logger.info('Host uptime: %s\n' % uptime_seconds)
         pass_fds = []
         if self.taplock_descriptor:
             pass_fds = [self.taplock_descriptor.fileno()]
@@ -1528,6 +1531,9 @@ class BaseConfig(object):
         signal.signal(signal.SIGTERM, signal.SIG_IGN)
 
         logger.info("Cleaning up")
+        with open('/proc/uptime', 'r') as f:
+            uptime_seconds = f.readline().split()[0]
+        logger.info('Host uptime: %s\n' % uptime_seconds)
         if self.cleantap:
             cmd = ('sudo', self.qemuifdown, self.tap, self.bindir_native)
             logger.debug('Running %s' % str(cmd))