Optimized dequeue using x86 vector instructions was added
in 21.05, but due to limited testing the default has been
changed back to the scalar mode implementation. The vector mode
implementation can be enabled via the devargs option
"vector_opts_enabled=<y/Y>".
Fixes: 000a7b8e7582 ("event/dlb2: optimize dequeue operation")
Signed-off-by: Timothy McDaniel <timothy.mcdaniel@intel.com>
Signed-off-by: David Marchand <david.marchand@redhat.com>
Deferred scheduling is a DLB v1.0 feature, and is not valid for
DLB v2.0 or v2.5.
Fixes: bc62748bd7d4 ("event/dlb2: add private data structures and constants")
Fixes: a2e4f1f5e79f ("event/dlb2: add dequeue and its burst variants")
Cc: stable@dpdk.org
Signed-off-by: Timothy McDaniel <timothy.mcdaniel@intel.com>
Convert code to use x86 vector instructions, thereby significantly
improving dequeue performance.
Signed-off-by: Timothy McDaniel <timothy.mcdaniel@intel.com>
Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
The new devarg names and their default values
are listed below. The defaults have not changed, and
none of these parameters are accessed in the fast path.
poll_interval=1000
sw_credit_quantai=32
default_depth_thresh=256
Signed-off-by: Timothy McDaniel <timothy.mcdaniel@intel.com>
Add support for DLB v2.5 probe-time hardware init,
and sets up a framework for incorporating the remaining
changes required to support DLB v2.5.
DLB v2.0 and DLB v2.5 are similar in many respects, but their
register offsets and definitions are different. As a result of these,
differences, the low level hardware functions must take the device
version into consideration. This requires that the hardware version be
passed to many of the low level functions, so that the PMD can
take the appropriate action based on the device version.
To ease the transition and keep the individual patches small, three
temporary files are added in this commit. These files have "new"
in their names. The files with "new" contain changes specific to a
consolidated PMD that supports both DLB v2.0 and DLB 2.5. Their sister
files of the same name (minus "new") contain the old DLB v2.0 specific
code. The intent is to remove code from the original files as that code
is ported to the combined DLB 2.0/2.5 PMD model and added to the "new"
files in a series of commits. At end of the patch series, the old files
will be empty and the "new" files will have the logic needed
to implement a single PMD that supports both DLB v2.0 and DLB v2.5.
At that time, the original DLB v2.0 specific files will be deleted,
and the "new" files will be renamed and replace them.
Signed-off-by: Timothy McDaniel <timothy.mcdaniel@intel.com>
This commit adds dlb v2.5 probe support, and updates
parameter parsing.
The dlb v2.5 device differs from dlb v2, in that the
number of resources (ports, queues, ...) is different,
so macros have been added to take the device version
into account.
Signed-off-by: Timothy McDaniel <timothy.mcdaniel@intel.com>
The page size is often retrieved from the macro PAGE_SIZE.
If PAGE_SIZE is not defined, it is either using hard coded default,
or getting the system value from the UNIX-only function sysconf().
Such definitions are replaced with the generic function
rte_mem_page_size() defined for each supported OS.
Removing PAGE_SIZE definitions will fix dlb drivers for musl libc,
because #ifdef checks were missing, causing redefinition errors.
Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Andrew Boyer <aboyer@pensando.io>
Acked-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Acked-by: David Marchand <david.marchand@redhat.com>
Acked-by: Timothy McDaniel <timothy.mcdaniel@intel.com>
The PMD uses a public interface to allow applications to
control the token pop mode. Supported token pop modes are
as follows, and they impact core scheduling affinity for
ldb ports.
AUTO_POP: Pop the CQ tokens immediately after dequeueing.
DELAYED_POP: Pop CQ tokens after (dequeue_depth - 1) events
are released. Supported on load-balanced ports
only.
DEFERRED_POP: Pop the CQ tokens during next dequeue operation.
Signed-off-by: Timothy McDaniel <timothy.mcdaniel@intel.com>
Reviewed-by: Gage Eads <gage.eads@intel.com>
The header file dlb2_priv.h is used internally by the PMD.
It include constants, macros for device resources,
structure definitions for hardware interfaces and
software state, and various forward-declarations.
The header file rte_pmd_dlb2.h will be exported in a
subsequent patch, but is included here due to a data
structure dependency.
Signed-off-by: Timothy McDaniel <timothy.mcdaniel@intel.com>
Reviewed-by: Gage Eads <gage.eads@intel.com>
