How + where does BareMetal kernel outperform kernel bypass?

Kernel Bypass (DPDK/RDMA) works in HFT because it solved the latency problem for always-on persistent strategies. Traditional Linux OS adds 20-200 microseconds just moving packets through the kernel and DPDK eliminates that by giving the application direct access to the NIC's receive and transmit queues.  But kernel bypass comes with serious structural costs - and requires extensive application redesign. There are heavy cost implications. 

"North of $1M to build a kernel-bypass stack, sometimes $1.5 to $2M with FPGA integration included. ConnectX-7 NICs racked at $1,599/card, 2 to 4 per server. Tick-to-trade drops 20 to 30%. " - Alex Silahian, CTPO at IBDX Corporation.

The heavy engineering requirements come from the central premise of kernel bypass , to build around the OS. BareMetal Kernel from ReturnInfinity took a more direct route, by removing the OS tax outright. This results in sharply faster cold boot times. 

Despite this, I would not (and cannot) advocate for replacing entrenched DPDK at the top traders. While DPDK's polling model is a heavy computational overhead, it actually works in scenarios like statistical arbitrage modeling where 24/7 activity is needed. However, there are some areas where BareMetal Kernel gets serious consideration. These would be quantitative hedge funds, multi-strategy platforms and mid-frequency shops that need low-latency execution without a dedicated team of low-latency engineers to maintain a DPDK stack. 

Our kernel is best suited for reactive, event driven strategies (news-triggered entries, options expiry bursts, cross-venue arbitrage windows), where you cannot afford to pre-warm instances that sit idle 99% of the time. BareMetal Kernel is fastest out of the gates, and gives trader a winning edge. 

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