[Qemu-devel] Re: [RFC PATCH 04/14] KVM-test: Add a new subtest ping

[Lucas Meneghel Rodrigues <lmr@redhat.com>]

On Tue, 2010-07-20 at 09:35 +0800, Amos Kong wrote:
> This test use ping to check the virtual nics, it contains two kinds of test:
> 1. Packet loss ratio test, ping the guest with different size of packets.
> 2. Stress test, flood ping guest then use ordinary ping to test the network.
> 
> The interval and packet size could be configurated through tests_base.cfg
> 
> 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/ping.py b/client/tests/kvm/tests/ping.py
> new file mode 100644
> index 0000000..cfccda4
> --- /dev/null
> +++ b/client/tests/kvm/tests/ping.py
> @@ -0,0 +1,71 @@
> +import logging, time, re, commands
> +from autotest_lib.client.common_lib import error
> +import kvm_subprocess, kvm_test_utils, kvm_utils, kvm_net_utils
> +
> +
> +def run_ping(test, params, env):
> +    """
> +    Ping the guest with different size of packets.
> +
> +    Packet Loss Test:
> +    1) Ping the guest with different size/interval of packets.
> +    Stress Test:
> +    1) Flood ping the guest.
> +    2) Check if the network is still usable.
> +
> +    @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)
> +
> +    counts = params.get("ping_counts", 100)
> +    flood_minutes = float(params.get("flood_minutes", 10))
> +    nics = params.get("nics").split()
> +    strict_check = params.get("strict_check", "no") == "yes"
> +
> +    packet_size = [0, 1, 4, 48, 512, 1440, 1500, 1505, 4054, 4055, 4096, 4192,
> +                   8878, 9000, 32767, 65507]
> +
> +    try:
> +        for i, nic in enumerate(nics):
> +            ip = vm.get_address(i)
> +            if not ip:
> +                logging.error("Could not get the ip of nic index %d" % i)
> +                continue
> +
> +            for size in packet_size:
> +                logging.info("Ping with packet size %s" % size)
> +                status, output = kvm_net_utils.ping(ip, 10,
> +                                                    packetsize = size,
> +                                                    timeout = 20)
> +                if strict_check:
> +                    ratio = kvm_net_utils.get_loss_ratio(output)
> +                    if ratio != 0:
> +                        raise error.TestFail(" Loss ratio is %s for packet size"
> +                                             " %s" % (ratio, size))
> +                else:
> +                    if status != 0:
> +                        raise error.TestFail(" Ping returns non-zero value %s" %
> +                                             output)

^ "Ping failed, status: %s, output: %s" would be a better exception
message.

> +
> +            logging.info("Flood ping test")
> +            kvm_net_utils.ping(ip, None, flood = True, output_func= None,
> +                               timeout = flood_minutes * 60)

^ Please get rid of the spaces here

> +            logging.info("Final ping test")
> +            status, output = kvm_net_utils.ping(ip, counts,
> +                                                timeout = float(counts) * 1.5)

^ What is this last test for again?

> +            if strict_check:
> +                ratio = kvm_net_utils.get_loss_ratio(output)
> +                if ratio != 0:
> +                    raise error.TestFail("Packet loss ratio is %s after flood"
> +                                         % ratio)
> +            else:
> +                if status != 0:
> +                    raise error.TestFail(" Ping returns non-zero value %s" %
> +                                         output)
> +    finally:
> +        session.close()
> diff --git a/client/tests/kvm/tests_base.cfg.sample b/client/tests/kvm/tests_base.cfg.sample
> index 6710c00..4f58dc0 100644
> --- a/client/tests/kvm/tests_base.cfg.sample
> +++ b/client/tests/kvm/tests_base.cfg.sample
> @@ -349,6 +349,11 @@ variants:
>          kill_vm_gracefully_vm2 = no
>          address_index_vm2 = 1
>  
> +    - ping: install setup unattended_install.cdrom
> +        type = ping
> +        counts = 100
> +        flood_minutes = 10
> +
>      - physical_resources_check: install setup unattended_install.cdrom
>          type = physical_resources_check
>          catch_uuid_cmd = dmidecode | awk -F: '/UUID/ {print $2}'
> 
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