Cover-letter: It is pretty common for the DPDK applications to be deployed in semi-pipeline model. In these models, a small number of cores (typically 1) are designated as I/O cores. The I/O cores work on receiving and transmitting packets from the NIC and several packet processing cores. The IO core and the packet processing cores exchange the packets over a ring. Typically, such applications receive the mbufs in a temporary array and copy the mbufs on to the ring. Depending on the requirements the packets could be copied in batches of 32, 64 etc resulting in 256B, 512B etc memory copy.
The scatter gather APIs help avoid intermediate copies by exposing the space on the ring directly to the application. v2: changed the patch to use the SP-SC and HTS modes v1: Initial version Todo: Add test cases Honnappa Nagarahalli (1): lib/ring: add scatter gather APIs lib/librte_ring/meson.build | 3 +- lib/librte_ring/rte_ring_elem.h | 1 + lib/librte_ring/rte_ring_peek_sg.h | 552 +++++++++++++++++++++++++++++ 3 files changed, 555 insertions(+), 1 deletion(-) create mode 100644 lib/librte_ring/rte_ring_peek_sg.h -- 2.17.1
