Mark usage function as __dead2 in programs where it does not return

In most cases, usage does not return, so mark them as __dead2. For the
cases where they do return, they have not been marked __dea

Mark usage function as __dead2 in programs where it does not return

In most cases, usage does not return, so mark them as __dead2. For the
cases where they do return, they have not been marked __dead2.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/735

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tests/libalias: Measure cleanup time separatly

After long test runs, a lot of ressouces can be allocated. Freeing
them takes a considerable amount of time.

tests/libalias: Fix build error due to wrong prototype

tests/libalias: Add missing prototype to fix build error

tests/libalias: Add port forwardings

Add port forwardings to the performance tests. This will cause random
incoming packets to match the random port forwardings opends beforehand.

MFC after: 1 wee

tests/libalias: Add port forwardings

Add port forwardings to the performance tests. This will cause random
incoming packets to match the random port forwardings opends beforehand.

MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D30443

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tests/libalias: Improve testing

gettimeofday(3) is almost as expensive as the calls to libalias.
So the call frequency for this call is reduced by a factor of 1000 in
order to neglect it's influence

tests/libalias: Improve testing

gettimeofday(3) is almost as expensive as the calls to libalias.
So the call frequency for this call is reduced by a factor of 1000 in
order to neglect it's influence.

Using NAT entries became more realistic: A communication of a random
length of up to 150 packets (10% outgoing, 90% incoming) is applied
for each entry.

Precision of the execution time is raised to see the trends better.

Reviewed by: kp
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D30405

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tests/libalias: Factor out common primitives

Rework the tests to check the correct layer in a single test.
Factor out tests for reuse in other modules.

MFC after: 1 week
Differential Revision: http

tests/libalias: Factor out common primitives

Rework the tests to check the correct layer in a single test.
Factor out tests for reuse in other modules.

MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D30412

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tests/libalias: Add missing copyright statements

test/libalias: Fix build errors on various platforms

struct timeval has an unspecified integral type, which needs to be
canonfied before beeing usable by printf(3).

tests/libalias: Add perfomance test utility

In order to compare upcoming changes for their effectivness, measure
performance by counting opertions and the runtime of each operation
over the time. A

tests/libalias: Add perfomance test utility

In order to compare upcoming changes for their effectivness, measure
performance by counting opertions and the runtime of each operation
over the time. Accumulate all tests in a single instance, so make it
complicated over the time. If you wait long enough, you will notice
the expiry of old flows.

Reviewed by: kp (earlier version)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D30379

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