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A number of tests and examples use dhclient in both IPv4 and IPv6 modes.
We use "dhclient -6" for IPv6, but usually just "dhclient" for IPv4. Add
an explicit "-4" argument to make it more clear and explicit.
In addition, when dhclient is run from within pasta it usually won't be
"real" root, and so will not have access to write the default global pid
file. This results in a mostly harmless but irritating error:
Can't create /var/run/dhclient.pid: Permission denied
We can avoid that by using the --no-pid flag to dhclient.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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ip(8)'s ability to take abbreviated arguments (e.g. "li sh" instead of
"link show") is very handy when using it interactively, but it doesn't make
for very readable scripts and examples when shown that way.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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There are a few occurrences of this assignment, which are needed to
re-add ::1 as loopback address after the MTU has been increased
back from a value below 1280 bytes.
This one, however, is redundant, and causes an error in the
execution.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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I didn't have time to investigate the root cause for the virtio_net
TX hang yet. Add a quick work-around for the moment being.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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That test fails sometimes, it looks like iperf3 is still sending
initial messages that are too big. I'll need to figure out why,
but given that 256 bytes is not really an expected MTU, drop the
thresholds to zero for the moment being.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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With a recent 5.15 kernel, passing a huge window size to iperf3 with
lower MTUs makes iperf3 stop sending packets after a few seconds --
I haven't investigated this in detail, but the window size will be
adjusted dynamically anyway and not passing it doesn't actually
affect throughput, so simply drop the option.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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The throughput results in this test look quite variable, slightly
lower figures look reasonable anyway.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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With recent improvements, we're not CPU-bound at all while testing
UDP performance. Give the VM more memory and CPUs, forward two
additional ports, start up to four threads in parallel, and give
single iperf3 threads higher bandwidth targets.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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On most recent CPUs, that's a better indication of all-core turbo
frequency, or non-turbo frequency, than /proc/cpuinfo.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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...performance with 64KiB MTUs might look worse than with 9000bytes
on some configurations.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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...we might see misleading rate drops with larger MTUs otherwise.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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Get it to work also in nested virtualisation environments.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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Not really quick, definitely dirty.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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