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'__sync' built-in functions are deprecated, should use the '__atomic' built-in instead. the sync built-in functions are full barriers, while atomic built-in functions offer less restrictive one-way barriers, which help performance. Here is the example test result on TX2: sudo ./arm64-armv8a-linuxapp-gcc/app/test -c 0x7fffffe \ -n 4 --socket-mem=1024,0 --file-prefix=~ -- -i RTE>>ring_perf_autotest *** ring_perf_autotest without this patch *** SP/SC bulk enq/dequeue (size: 8): 6.22 MP/MC bulk enq/dequeue (size: 8): 11.50 SP/SC bulk enq/dequeue (size: 32): 1.85 MP/MC bulk enq/dequeue (size: 32): 2.66 *** ring_perf_autotest with this patch *** SP/SC bulk enq/dequeue (size: 8): 6.13 MP/MC bulk enq/dequeue (size: 8): 9.83 SP/SC bulk enq/dequeue (size: 32): 1.96 MP/MC bulk enq/dequeue (size: 32): 2.30 So for the ring performance test, this patch improved 11% of ring operations performance. Signed-off-by: Phil Yang <phil.yang@arm.com> Reviewed-by: Gavin Hu <gavin.hu@arm.com> Reviewed-by: Joyce Kong <joyce.kong@arm.com> Reviewed-by: Dharmik Thakkar <dharmik.thakkar@arm.com>
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