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Stanislaw Kardach 1abb185d6c stack: allow lock-free only on relevant architectures
Since commit 7911ba0473 ("stack: enable lock-free implementation for
aarch64"), lock-free stack is supported on arm64 but this description was
missing from the doxygen for the flag.

Currently it is impossible to detect programmatically whether lock-free
implementation of rte_stack is supported. One could check whether the
header guard for lock-free stubs is defined (_RTE_STACK_LF_STUBS_H_) but
that's an unstable implementation detail. Because of that currently all
lock-free ring creations silently succeed (as long as the stack header
is 16B long) which later leads to push and pop operations being NOPs.
The observable effect is that stack_lf_autotest fails on platforms not
supporting the lock-free. Instead it should just skip the lock-free test
altogether.

This commit adds a new errno value (ENOTSUP) that may be returned by
rte_stack_create() to indicate that a given combination of flags is not
supported on a current platform.
This is detected by checking a compile-time flag in the include logic in
rte_stack_lf.h which may be used by applications to check the lock-free
support at compile time.

Use the added RTE_STACK_LF_SUPPORTED flag to disable the lock-free stack
tests at the compile time.
Perf test doesn't fail because rte_ring_create() succeeds, however
marking this test as skipped gives a better indication of what actually
was tested.

Fixes: 7911ba0473 ("stack: enable lock-free implementation for aarch64")

Signed-off-by: Stanislaw Kardach <kda@semihalf.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
2021-05-03 18:46:15 +02:00
.ci build: update minimum required Meson version 2021-04-16 18:51:51 +02:00
.github/workflows ci: bump ABI reference version 2021-04-16 14:09:03 +02:00
app stack: allow lock-free only on relevant architectures 2021-05-03 18:46:15 +02:00
buildtools build: change indentation in infrastructure files 2021-04-21 14:04:09 +02:00
config net/pcap: build on Windows 2021-04-21 23:48:38 +02:00
devtools ethdev: add queue state in queried queue information 2021-04-19 18:25:35 +02:00
doc stack: allow lock-free only on relevant architectures 2021-05-03 18:46:15 +02:00
drivers net/pcap: build on Windows 2021-04-21 23:48:38 +02:00
examples examples/l3fwd: skip Tx queue drain on first FIB iteration 2021-04-21 20:43:41 +02:00
kernel lib: remove librte_ prefix from directory names 2021-04-21 14:04:09 +02:00
lib stack: allow lock-free only on relevant architectures 2021-05-03 18:46:15 +02:00
license lib: remove librte_ prefix from directory names 2021-04-21 14:04:09 +02:00
usertools build: change indentation in infrastructure files 2021-04-21 14:04:09 +02:00
.editorconfig doc: add Meson coding style to contributors guide 2021-04-21 14:04:09 +02:00
.gitattributes improve git diff 2016-11-13 15:25:12 +01:00
.gitignore regex/mlx5: introduce driver for BlueField 2 2020-07-21 19:04:05 +02:00
.travis.yml ci: bump ABI reference version 2021-04-16 14:09:03 +02:00
ABI_VERSION version: 21.05-rc0 2021-02-15 11:08:19 +01:00
MAINTAINERS devtools: add script to ease backport of renamed files 2021-04-21 14:17:29 +02:00
Makefile build: create dummy Makefile 2020-09-07 23:51:57 +02:00
meson_options.txt lib: allow disabling optional libraries 2021-04-21 14:17:29 +02:00
meson.build lib: remove librte_ prefix from directory names 2021-04-21 14:04:09 +02:00
README
VERSION version: 21.05-rc1 2021-04-22 00:28:57 +02:00

DPDK is a set of libraries and drivers for fast packet processing.
It supports many processor architectures and both FreeBSD and Linux.

The DPDK uses the Open Source BSD-3-Clause license for the core libraries
and drivers. The kernel components are GPL-2.0 licensed.

Please check the doc directory for release notes,
API documentation, and sample application information.

For questions and usage discussions, subscribe to: users@dpdk.org
Report bugs and issues to the development mailing list: dev@dpdk.org