[PATCH v2 06/17] KVM-test: Add a subtest jumbo

Amos Kong
2010-08-23T08:49:40Z

According to different nic model set different MTU for it. And ping from guest
to host, to see whether tested size can be received by host.

Changes from v1:
- Make standard of lost ratio can be configured

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Amos Kong <akong@redhat.com>
---
0 files changed, 0 insertions(+), 0 deletions(-)

diff --git a/client/tests/kvm/tests/jumbo.py b/client/tests/kvm/tests/jumbo.py
new file mode 100644
index 0000000..0d7acf0
--- /dev/null
+++ b/client/tests/kvm/tests/jumbo.py
@@ -0,0 +1,129 @@
+import logging, commands, random
+from autotest_lib.client.common_lib import error
+from autotest_lib.client.bin import utils
+import kvm_test_utils, kvm_utils
+
+def run_jumbo(test, params, env):
+ """
+ Test the RX jumbo frame function of vnics:
+
+ 1) boot the vm
+ 2) change the MTU of guest nics and host taps depending on the nic model
+ 3) add the static arp entry for guest nic
+ 4) wait for the MTU ok
+ 5) verify the patch mtu using ping
+ 6) ping the guest with large frames
+ 7) increment size ping
+ 8) flood ping the guest with large frames
+ 9) verify the path mtu
+ 10) recover the mtu
+
+ @param test: kvm test object
+ @param params: Dictionary with the test parameters
+ @param env: Dictionary with test environment.
+ """
+
+ vm = kvm_test_utils.get_living_vm(env, params.get("main_vm"))
+ session = kvm_test_utils.wait_for_login(vm)
+ mtu = params.get("mtu", "1500")
+ flood_time = params.get("flood_time", "300")
+ max_icmp_pkt_size = int(mtu) - 28
+
+ ifname = vm.get_ifname(0)
+ ip = vm.get_address(0)
+ if ip is None:
+ raise error.TestError("Could not get the ip address")
+
+ try:
+ # Environment preparation
+ ethname = kvm_test_utils.get_linux_ifname(session, vm.get_macaddr(0))
+
+ logging.info("Changing the mtu of guest ...")
+ guest_mtu_cmd = "ifconfig %s mtu %s" % (ethname , mtu)
+ s, o = session.get_command_status_output(guest_mtu_cmd)
+ if s != 0:
+ logging.error(o)
+ raise error.TestError("Fail to set the mtu of guest nic: %s"
+ % ethname)
+
+ logging.info("Chaning the mtu of host tap ...")
+ host_mtu_cmd = "ifconfig %s mtu %s" % (ifname, mtu)
+ utils.run(host_mtu_cmd)
+
+ logging.info("Add a temporary static arp entry ...")
+ arp_add_cmd = "arp -s %s %s -i %s" % (ip, vm.get_macaddr(0), ifname)
+ utils.run(arp_add_cmd)
+
+ def is_mtu_ok():
+ s, o = kvm_test_utils.ping(ip, 1, interface=ifname,
+ packetsize=max_icmp_pkt_size,
+ hint="do", timeout=2)
+ return s == 0
+
+ def verify_mtu():
+ logging.info("Verify the path mtu")
+ s, o = kvm_test_utils.ping(ip, 10, interface=ifname,
+ packetsize=max_icmp_pkt_size,
+ hint="do", timeout=15)
+ if s != 0 :
+ logging.error(o)
+ raise error.TestFail("Path MTU is not as expected")
+ if kvm_test_utils.get_loss_ratio(o) != 0:
+ logging.error(o)
+ raise error.TestFail("Packet loss ratio during mtu verification"
+ " is not zero")
+
+ def flood_ping():
+ logging.info("Flood with large frames")
+ kvm_test_utils.ping(ip, interface=ifname,
+ packetsize=max_icmp_pkt_size,
+ flood=True, timeout=float(flood_time))
+
+ def large_frame_ping(count=100):
+ logging.info("Large frame ping")
+ s, o = kvm_test_utils.ping(ip, count, interface=ifname,
+ packetsize=max_icmp_pkt_size,
+ timeout=float(count) * 2)
+ ratio = kvm_test_utils.get_loss_ratio(o)
+ if ratio != 0:
+ raise error.TestFail("Loss ratio of large frame ping is %s"
+ % ratio)
+
+ def size_increase_ping(step=random.randrange(90, 110)):
+ logging.info("Size increase ping")
+ for size in range(0, max_icmp_pkt_size + 1, step):
+ logging.info("Ping %s with size %s" % (ip, size))
+ s, o = kvm_test_utils.ping(ip, 1, interface=ifname,
+ packetsize=size,
+ hint="do", timeout=1)
+ if s != 0:
+ s, o = kvm_test_utils.ping(ip, 10, interface=ifname,
+ packetsize=size,
+ adaptive=True, hint="do",
+ timeout=20)
+
+ if kvm_test_utils.get_loss_ratio(o) > int(params.get(
+ "fail_ratio", 50)):
+ raise error.TestFail("ping loss ratio is greater "
+ "than 50% for size %s" % size)
+
+ logging.info("Waiting for the MTU to be OK")
+ if not kvm_utils.wait_for(is_mtu_ok, 10, 0, 1):
+ logging.debug(commands.getoutput("ifconfig -a"))
+ raise error.TestError("10 seconds elapsed while the mtu is not"
+ " as expected")
+
+ # Functional Test
+ verify_mtu()
+ large_frame_ping()
+ size_increase_ping()
+
+ # Stress test
+ flood_ping()
+ verify_mtu()
+
+ finally:
+ # Environment clean
+ session.close()
+ logging.info("Removing the temporary arp entry")
+ utils.run("arp -d %s -i %s" % (ip, ifname))
diff --git a/client/tests/kvm/tests_base.cfg.sample b/client/tests/kvm/tests_base.cfg.sample
index d4b0ed0..1b80cdd 100644
--- a/client/tests/kvm/tests_base.cfg.sample
+++ b/client/tests/kvm/tests_base.cfg.sample
@@ -358,6 +358,9 @@ variants:
counts = 100
flood_minutes = 10

+ - jumbo: install setup unattended_install.cdrom
+ type = jumbo
+
- physical_resources_check: install setup unattended_install.cdrom
type = physical_resources_check
catch_uuid_cmd = dmidecode | awk -F: '/UUID/ {print $2}'
@@ -493,10 +496,16 @@ variants:
variants:
- @rtl8139:
nic_model = rtl8139
+ jumbo:
+ mtu = 1500
- e1000:
nic_model = e1000
+ jumbo:
+ mtu = 16110
- virtio:
nic_model = virtio
+ jumbo:
+ mtu = 65520

# Guests
@@ -1050,7 +1059,7 @@ variants:

# Windows section
- @Windows:
- no autotest linux_s3 vlan_tag ioquit unattended_install.(url|nfs|remote_ks)
+ no autotest linux_s3 vlan_tag ioquit unattended_install.(url|nfs|remote_ks) jumbo
shutdown_command = shutdown /s /f /t 0
reboot_command = shutdown /r /f /t 0
status_test_command = echo %errorlevel%