Implement 2 new functions that will enable write combining stores depending on architecture. The functions are provided as a generic stub and a x86 specific implementation.
The reason to implement these functions is to improve performance by reducing the overhead associated with regular mmio writes when updating the hardware queue tails and doorbells. With this patch set the I40E, IXGBE and QAT PMDs are updated to use the write combining store functions with other PMDs to follow. Radu Nicolau (4): eal: add WC store functions net/i40e: use WC store to update queue tail registers common/qat: use WC store to update queue tail registers net/ixgbe: use WC store to update doorbell register .../qat/qat_adf/adf_transport_access_macros.h | 6 ++- drivers/net/i40e/base/i40e_osdep.h | 5 ++ drivers/net/i40e/i40e_rxtx.c | 8 ++-- drivers/net/i40e/i40e_rxtx_vec_avx2.c | 4 +- drivers/net/i40e/i40e_rxtx_vec_sse.c | 4 +- drivers/net/ixgbe/base/ixgbe_osdep.h | 6 +++ drivers/net/ixgbe/ixgbe_rxtx.c | 4 +- drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c | 4 +- lib/librte_eal/arm/include/rte_io_64.h | 12 +++++ lib/librte_eal/include/generic/rte_io.h | 48 +++++++++++++++++++ lib/librte_eal/x86/include/rte_io.h | 56 ++++++++++++++++++++++ 11 files changed, 143 insertions(+), 14 deletions(-) -- 2.7.4
