Checks the time drift introduced by several reboots (default 1).
Signed-off-by: Michael Goldish <mgoldish@xxxxxxxxxx>
---
client/tests/kvm/kvm_tests.cfg.sample | 5 ++
client/tests/kvm/tests/timedrift_with_reboot.py | 88 +++++++++++++++++++++++
2 files changed, 93 insertions(+), 0 deletions(-)
create mode 100644 client/tests/kvm/tests/timedrift_with_reboot.py
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))
--
1.5.4.1
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