[KVM-AUTOTEST,5/7] KVM test: new test timedrift_with_reboot

Commit Message

Michael Goldish Oct. 7, 2009, 5:54 p.m. UTC

None

Patch

diff --git a/client/tests/kvm/kvm_tests.cfg.sample b/client/tests/kvm/kvm_tests.cfg.sample
index 618c21e..e80b645 100644
--- a/client/tests/kvm/kvm_tests.cfg.sample
+++ b/client/tests/kvm/kvm_tests.cfg.sample
@@ -120,6 +120,11 @@  variants:
                 migration_iterations = 3
                 drift_threshold = 10
                 drift_threshold_single = 3
+            - with_reboot:
+                type = timedrift_with_reboot
+                reboot_iterations = 1
+                drift_threshold = 10
+                drift_threshold_single = 3
 
     - stress_boot:  install setup
         type = stress_boot
diff --git a/client/tests/kvm/tests/timedrift_with_reboot.py b/client/tests/kvm/tests/timedrift_with_reboot.py
new file mode 100644
index 0000000..642daaf
--- /dev/null
+++ b/client/tests/kvm/tests/timedrift_with_reboot.py
@@ -0,0 +1,88 @@ 
+import logging, time, commands, re
+from autotest_lib.client.common_lib import error
+import kvm_subprocess, kvm_test_utils, kvm_utils
+
+
+def run_timedrift_with_reboot(test, params, env):
+    """
+    Time drift test with reboot:
+
+    1) Log into a guest.
+    2) Take a time reading from the guest and host.
+    3) Reboot the guest.
+    4) Take a second time reading.
+    5) If the drift (in seconds) is higher than a user specified value, fail.
+
+    @param test: KVM test object.
+    @param params: Dictionary with test parameters.
+    @param env: Dictionary with the test environment.
+    """
+    vm = kvm_test_utils.get_living_vm(env, params.get("main_vm"))
+    session = kvm_test_utils.wait_for_login(vm)
+
+    # Collect test parameters:
+    # Command to run to get the current time
+    time_command = params.get("time_command")
+    # Filter which should match a string to be passed to time.strptime()
+    time_filter_re = params.get("time_filter_re")
+    # Time format for time.strptime()
+    time_format = params.get("time_format")
+    drift_threshold = float(params.get("drift_threshold", "10"))
+    drift_threshold_single = float(params.get("drift_threshold_single", "3"))
+    reboot_iterations = int(params.get("reboot_iterations", 1))
+
+    try:
+        # Get initial time
+        # (ht stands for host time, gt stands for guest time)
+        (ht0, gt0) = kvm_test_utils.get_time(session, time_command,
+                                             time_filter_re, time_format)
+
+        # Reboot
+        for i in range(reboot_iterations):
+            # Get time before current iteration
+            (ht0_, gt0_) = kvm_test_utils.get_time(session, time_command,
+                                                   time_filter_re, time_format)
+            # Run current iteration
+            logging.info("Rebooting: iteration %d of %d..." %
+                         (i + 1, reboot_iterations))
+            session = kvm_test_utils.reboot(vm, session)
+            # Get time after current iteration
+            (ht1_, gt1_) = kvm_test_utils.get_time(session, time_command,
+                                                   time_filter_re, time_format)
+            # Report iteration results
+            host_delta = ht1_ - ht0_
+            guest_delta = gt1_ - gt0_
+            drift = abs(host_delta - guest_delta)
+            logging.info("Host duration (iteration %d): %.2f" %
+                         (i + 1, host_delta))
+            logging.info("Guest duration (iteration %d): %.2f" %
+                         (i + 1, guest_delta))
+            logging.info("Drift at iteration %d: %.2f seconds" %
+                         (i + 1, drift))
+            # Fail if necessary
+            if drift > drift_threshold_single:
+                raise error.TestFail("Time drift too large at iteration %d: "
+                                     "%.2f seconds" % (i + 1, drift))
+
+        # Get final time
+        (ht1, gt1) = kvm_test_utils.get_time(session, time_command,
+                                             time_filter_re, time_format)
+
+    finally:
+        session.close()
+
+    # Report results
+    host_delta = ht1 - ht0
+    guest_delta = gt1 - gt0
+    drift = abs(host_delta - guest_delta)
+    logging.info("Host duration (%d reboots): %.2f" %
+                 (reboot_iterations, host_delta))
+    logging.info("Guest duration (%d reboots): %.2f" %
+                 (reboot_iterations, guest_delta))
+    logging.info("Drift after %d reboots: %.2f seconds" %
+                 (reboot_iterations, drift))
+
+    # Fail if necessary
+    if drift > drift_threshold:
+        raise error.TestFail("Time drift too large after %d reboots: "
+                             "%.2f seconds" % (reboot_iterations, drift))