ethdev: optimize activation of fast path tracepoints

Split the tracepoints rte_ethdev_trace_rx_burst and
rte_eth_trace_call_rx_callbacks into two separate ones
for empty and non-empty calls to avoid

ethdev: optimize activation of fast path tracepoints

Split the tracepoints rte_ethdev_trace_rx_burst and
rte_eth_trace_call_rx_callbacks into two separate ones
for empty and non-empty calls to avoid saturating
quickly the trace buffer.

Signed-off-by: Adel Belkhiri <adel.belkhiri@polymtl.ca>
Acked-by: Jerin Jacob <jerinj@marvell.com>

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use C linkage where appropriate in headers

Assure that 'extern "C" { /../ }' do not cover files included from a
particular header file, and address minor issues resulting from this
change of order.

use C linkage where appropriate in headers

Assure that 'extern "C" { /../ }' do not cover files included from a
particular header file, and address minor issues resulting from this
change of order.

Dealing with C++ should delegate to the individual include file level,
rather than being imposed by the user of that file. For example,
forcing C linkage prevents __Generic macros being replaced with
overloaded static inline functions in C++ translation units.

Eliminate 'extern "C"' from files which do not declare any symbols
(e.g., only macros or struct types).

On the other hand, the headers check is too naive in assuming that all
headers must contain a 'extern "C"'. Such a check was added in commit
1ee492bdc4ff ("buildtools/chkincs: check missing C++ guards").
Since this current change results in many headers not containing such
a token, remove the check for 'extern "C"' until we have a better
implementation.

Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>
Signed-off-by: David Marchand <david.marchand@redhat.com>

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ethdev: add Tx queue used count query

Introduce a new API to retrieve the number of used descriptors
in a Tx queue. Applications can leverage this API in the fast path to
inspect the Tx queue occupa

ethdev: add Tx queue used count query

Introduce a new API to retrieve the number of used descriptors
in a Tx queue. Applications can leverage this API in the fast path to
inspect the Tx queue occupancy and take appropriate actions based on the
available free descriptors.

A notable use case could be implementing Random Early Discard (RED)
in software based on Tx queue occupancy.

Signed-off-by: Jerin Jacob <jerinj@marvell.com>
Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Acked-by: Morten Brørup <mb@smartsharesystems.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@huawei.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@amd.com>

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ethdev: add trace points

Adds trace points for ethdev functions.

The rte_ethdev_trace.h is removed. The file ethdev_trace.h is added as
an internal header. ethdev_trace.h contains internal slow pat

ethdev: add trace points

Adds trace points for ethdev functions.

The rte_ethdev_trace.h is removed. The file ethdev_trace.h is added as
an internal header. ethdev_trace.h contains internal slow path and
fast path tracepoints. The public fast path tracepoints are present in
rte_ethdev_trace_fp.h header.

Signed-off-by: Ankur Dwivedi <adwivedi@marvell.com>
Acked-by: Sunil Kumar Kori <skori@marvell.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@amd.com>

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lib: remove librte_ prefix from directory names

There is no reason for the DPDK libraries to all have 'librte_' prefix on
the directory names. This prefix makes the directory names longer and also
m

lib: remove librte_ prefix from directory names

There is no reason for the DPDK libraries to all have 'librte_' prefix on
the directory names. This prefix makes the directory names longer and also
makes it awkward to add features referring to individual libraries in the
build - should the lib names be specified with or without the prefix.
Therefore, we can just remove the library prefix and use the library's
unique name as the directory name, i.e. 'eal' rather than 'librte_eal'

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>

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