From f9f7b34d546a79bec55cf9d0e48ef3876f0f67d7 Mon Sep 17 00:00:00 2001 From: Michael West Date: Wed, 13 Feb 2019 16:29:18 -0800 Subject: RFNoC: Disable FC ACK packets for lossless links FC ACK packets are unnecessary on lossless links and degrade overall performance. This change disables those packets on all lossless links. Signed-off-by: Michael West --- host/lib/rfnoc/source_block_ctrl_base.cpp | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'host/lib/rfnoc/source_block_ctrl_base.cpp') diff --git a/host/lib/rfnoc/source_block_ctrl_base.cpp b/host/lib/rfnoc/source_block_ctrl_base.cpp index 6c41fae14..656ab26af 100644 --- a/host/lib/rfnoc/source_block_ctrl_base.cpp +++ b/host/lib/rfnoc/source_block_ctrl_base.cpp @@ -86,6 +86,7 @@ void source_block_ctrl_base::set_destination( } void source_block_ctrl_base::configure_flow_control_out(const bool enable_fc_output, + const bool lossless_link, const size_t buf_size_bytes, const size_t pkt_limit, const size_t block_port, @@ -124,8 +125,9 @@ void source_block_ctrl_base::configure_flow_control_out(const bool enable_fc_out // count based flow control const bool enable_byte_fc = (buf_size_bytes != 0); const bool enable_pkt_cnt_fc = (pkt_limit != 0); - const uint32_t config = (enable_fc_output ? 1 : 0) | (enable_byte_fc << 1) - | (enable_pkt_cnt_fc << 2); + const uint32_t config = (enable_fc_output ? 1 : 0) | ((enable_byte_fc ? 1 : 0) << 1) + | ((enable_pkt_cnt_fc ? 1 : 0) << 2) + | ((lossless_link ? 1 : 0) << 3); // Resize the FC window. // Precondition: No data can be buffered upstream. -- cgit v1.2.3