event/sw: perform partial burst enqueues

Previously, the sw PMD would enqueue either all or no events, depending on
if enough inflight credits were available for the new events in the burst.
If a po

event/sw: perform partial burst enqueues

Previously, the sw PMD would enqueue either all or no events, depending on
if enough inflight credits were available for the new events in the burst.
If a port is enqueueing a large burst (i.e. a multiple of the credit update
quanta), this can result in suboptimal performance, and requires an
understanding of the sw PMD implementation (in particular, its credit
scheme) to tune an application's burst size.

This affects software that enqueues large bursts of new events, such as the
ethernet event adapter which uses a 128-deep event buffer, when the input
packet rate is sufficiently high.

This change makes the sw PMD enqueue as many events as it has credits, if
there are any new events in the burst.

Signed-off-by: Gage Eads <[email protected]>
Acked-by: Harry van Haaren <[email protected]>

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event/sw: simplify credit scheme

This commit modifies the sw PMD credit scheme such that credits are
consumed when enqueueing a NEW event and released when an event is
released -- typically, the beg

event/sw: simplify credit scheme

This commit modifies the sw PMD credit scheme such that credits are
consumed when enqueueing a NEW event and released when an event is
released -- typically, the beginning and end of a pipeline. Workers that
simply forward events do not interact with the credit pool.

Signed-off-by: Gage Eads <[email protected]>
Acked-by: Harry van Haaren <[email protected]>

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eventdev: add implicit release disable capability

This commit introduces a capability for disabling the "implicit" release
functionality for a port, which prevents the eventdev PMD from issuing
outs

eventdev: add implicit release disable capability

This commit introduces a capability for disabling the "implicit" release
functionality for a port, which prevents the eventdev PMD from issuing
outstanding releases for previously dequeued events when dequeuing a new
batch of events.

If a PMD does not support this capability, the application will receive an
error if it attempts to setup a port with implicit releases disabled.
Otherwise, if the port is configured with implicit releases disabled, the
application must release each dequeued event by invoking
rte_event_enqueue_burst() with RTE_EVENT_OP_RELEASE or
RTE_EVENT_OP_FORWARD.

Signed-off-by: Gage Eads <[email protected]>
Acked-by: Harry van Haaren <[email protected]>

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drivers: use SPDX tag for Intel copyright files

Replace the BSD license header with the SPDX tag for files
with only an Intel copyright on them.

Signed-off-by: Bruce Richardson <bruce.richardson@in

drivers: use SPDX tag for Intel copyright files

Replace the BSD license header with the SPDX tag for files
with only an Intel copyright on them.

Signed-off-by: Bruce Richardson <[email protected]>

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event/sw: allow forward and release when out of credits

When forwarding or releasing events, the operation would fail if the port
has 0 inflight credits and cannot acquire more, or the inflight coun

event/sw: allow forward and release when out of credits

When forwarding or releasing events, the operation would fail if the port
has 0 inflight credits and cannot acquire more, or the inflight count
exceeds the port's new event threshold.

This patch fixes that by counting the number of new events in the burst,
and applying the credit and new event threshold checks accordingly.

Signed-off-by: Gage Eads <[email protected]>
Acked-by: Harry van Haaren <[email protected]>

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event/sw: change worker rings to standard event rings

Now that we have a standard event ring implementation for passing events
core-to-core, use that in place of the custom event rings in the softwa

event/sw: change worker rings to standard event rings

Now that we have a standard event ring implementation for passing events
core-to-core, use that in place of the custom event rings in the software
eventdev.

Signed-off-by: Bruce Richardson <[email protected]>
Signed-off-by: Harry van Haaren <[email protected]>
Acked-by: Harry van Haaren <[email protected]>

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event/sw: fix credit tracking in port dequeue

Single-link optimized ports previously did not correctly track
credits when dequeued, and re-enqueued as a FORWARD type. This
could "inflate" the number

event/sw: fix credit tracking in port dequeue

Single-link optimized ports previously did not correctly track
credits when dequeued, and re-enqueued as a FORWARD type. This
could "inflate" the number of credits in the system.

A unit test is added to reproduce and verify the issue, and the
fixed implementation counts FORWARD packets, and reduces the
number of credits the port has if it is of single-link type.

Fixes: 656af9180014 ("event/sw: add worker core functions")

Signed-off-by: Harry van Haaren <[email protected]>
Acked-by: Gage Eads <[email protected]>

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event/sw: fix credit return on invalid queue id

This patch returns a credit when an rte_event is
enqueued with an invalid queue_id. Previously a
credit was leaked from the system.

Note that the eve

event/sw: fix credit return on invalid queue id

This patch returns a credit when an rte_event is
enqueued with an invalid queue_id. Previously a
credit was leaked from the system.

Note that the eventdev instance does not attempt
to free any resources that the rte_event owns. As
a result, resources owned by the rte_event are leaked.
Eg. if the rte_event represents an rte_mbuf, the mbuf
will not be freed, and causes a leak from the mempool.

Fixes: 656af9180014 ("event/sw: add worker core functions")

Signed-off-by: Harry van Haaren <[email protected]>
Acked-by: David Hunt <[email protected]>

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event/sw: fix build for gcc 4.5.1

build error:
.../event/sw/sw_evdev_worker.c: In function ‘sw_event_release’:
.../event/sw/sw_evdev_worker.c:52:3: error: unknown field ‘op’ specified
in initializer

event/sw: fix build for gcc 4.5.1

build error:
.../event/sw/sw_evdev_worker.c: In function ‘sw_event_release’:
.../event/sw/sw_evdev_worker.c:52:3: error: unknown field ‘op’ specified
in initializer

Fixed by updating struct initialization.

Fixes: 656af9180014 ("event/sw: add worker core functions")

Signed-off-by: Ferruh Yigit <[email protected]>
Acked-by: Harry van Haaren <[email protected]>

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event/sw: add worker core functions

add the event enqueue, dequeue and release functions to the eventdev.
These also include tracking of stats for observability in the load of
the scheduler.
Interna

event/sw: add worker core functions

add the event enqueue, dequeue and release functions to the eventdev.
These also include tracking of stats for observability in the load of
the scheduler.
Internally in the enqueue function, the various types of enqueue
operations, to forward an existing event, to send a new event, to
drop a previous event, are converted to a series of flags which will
be used by the scheduler code to perform the needed actions for that
event.

Signed-off-by: Bruce Richardson <[email protected]>
Signed-off-by: Gage Eads <[email protected]>
Signed-off-by: Harry van Haaren <[email protected]>
Acked-by: Jerin Jacob <[email protected]>

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