Tests the ability of adding virtual cpus on the fly
to qemu, then after everything is OK, let's run the
cpu_hotplug testsuite on the guest through autotest.
When this feature matures, we'll already have
functional testing for it, the whole reasoning for
doing this was already explained on previous patches.
Signed-off-by: Lucas Meneghel Rodrigues <lmr@xxxxxxxxxx>
---
client/tests/kvm/tests/cpu_hotplug.py | 92 ++++++++++++++++++++++++++++++++
client/tests/kvm/tests_base.cfg.sample | 5 ++
2 files changed, 97 insertions(+), 0 deletions(-)
create mode 100644 client/tests/kvm/tests/cpu_hotplug.py
diff --git a/client/tests/kvm/tests/cpu_hotplug.py b/client/tests/kvm/tests/cpu_hotplug.py
new file mode 100644
index 0000000..013b45a
--- /dev/null
+++ b/client/tests/kvm/tests/cpu_hotplug.py
@@ -0,0 +1,92 @@
+import os, logging, re
+from autotest_lib.client.common_lib import error
+from autotest_lib.client.bin import utils
+import kvm_subprocess, kvm_utils, kvm_test_utils
+
+def run_cpu_hotplug(test, params, env):
+ """
+ Runs CPU hotplug test:
+
+ 1) Pick up a living guest
+ 2) Send the monitor command cpu_set [n cpus]
+ 3) Verify if guest has the additional CPU showing up under
+ /sys/devices/system/cpu
+ 4) Try to bring it online by writing 1 to the 'online' file inside that dir
+ 5) Run the CPU Hotplug test suite shipped with autotest inside guest
+
+ @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)
+
+ n_cpus_add = int(params.get("n_cpus_add", 1))
+ current_cpus = int(params.get("smp", 1))
+ total_cpus = current_cpus + n_cpus_add
+ # As of today (01-21-2010) it is unlikely that we're going to raise the
+ # number of processors of a VM to anywhere near 100, but still, it's good
+ # to put some boundaries to the test
+ if total_cpus > 100:
+ raise error.TestError("Unsupported number of total CPUs: %s. "
+ "Please choose a smaller number." % total_cpus)
+
+ dmesg_before = session.get_command_output("dmesg -c")
+
+ logging.info("Adding %d CPUs to guest" % n_cpus_add)
+ (ret, output) = vm.send_monitor_cmd("cpu_set %s online" % total_cpus)
+ if ret != 0:
+ raise error.TestFail("Failed to add CPUs to guest: %s" % output)
+
+ dmesg_after = session.get_command_output("dmesg -c")
+
+ logging.debug("Guest dmesg output after CPU add:\n%s" % dmesg_after)
+
+ # Verify whether the new cpus are showing up on /sys
+ n_cmd = 'find /sys/devices/system/cpu/cpu[0-99] -maxdepth 0 -type d | wc -l'
+ try:
+ cpus_after_addition = int(session.get_command_output(n_cmd))
+ except ValueError:
+ raise error.TestFail("Unable to get CPU count after CPU addition "
+ "(Guest dead?)")
+
+ if cpus_after_addition != total_cpus:
+ raise error.TestFail("%s CPUs are showing up under "
+ "/sys/devices/system/cpu, was expecting %s" %
+ (cpus_after_addition, total_cpus))
+
+ r_cmd = 'find /sys/devices/system/cpu/cpu[0-99]/online -maxdepth 0 -type f'
+ online_files = session.get_command_output(r_cmd).split().sort()
+
+ if not online_files:
+ raise error.TestFail("Could not find CPUs that can be "
+ "enabled/disabled on guest")
+
+ for online_file in online_files:
+ cpu_regexp = re.compile("cpu(\d+)", re.IGNORECASE)
+ cpu_id = cpu_regexp.findall(online_file)[0]
+ try:
+ online_status = int(session.get_command_output("cat %s" %
+ online_file))
+ except ValueError:
+ raise error.TestFail("Unable to get online status from CPU %s "
+ "(Guest dead?)" % cpu_id)
+ if online_status == 0:
+ logging.debug("CPU %s offline, bringing it online" % cpu_id)
+ rc = session.get_command_status("echo 1 > %s" % online_file)
+ if rc != 0:
+ raise error.TestError("Error bringing guest CPU %s online" %
+ cpu_id)
+
+ # Now that all CPUs were onlined, let's execute the
+ # autotest CPU Hotplug test
+ timeout = int(params.get("cpu_hotplug_timeout"))
+ test_name = "cpu_hotplug"
+ control_path = os.path.join(test.bindir, "autotest_control",
+ "cpu_hotplug.control")
+ outputdir = test.outputdir
+
+ logging.info("Executing CPU hotplug autotest on guest")
+ kvm_test_utils.run_autotest(vm, session, control_path, timeout, test_name,
+ outputdir)
+
diff --git a/client/tests/kvm/tests_base.cfg.sample b/client/tests/kvm/tests_base.cfg.sample
index e48f1d2..a1af395 100644
--- a/client/tests/kvm/tests_base.cfg.sample
+++ b/client/tests/kvm/tests_base.cfg.sample
@@ -240,6 +240,11 @@ variants:
- fmt_raw:
image_format_stg = raw
+ - cpu_hotplug:
+ type = cpu_hotplug
+ cpu_hotplug_timeout = 600
+ n_cpus_add = 1
+
- system_reset: install setup unattended_install
type = boot
reboot_method = system_reset
--
1.6.6
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
