Re: [dpdk-dev] [PATCH] net/dpdkoin: add new driver

[Ferruh Yigit <ferruh.yigit@intel.com>]

On 4/1/2020 2:10 PM, Matteo Croce wrote:
> DPDK polls the packet in a busy loop. This means that CPU constantly spins
> looking for packets, regardless of the network traffic.
> DPDK does this to reduce latency and avoid using interrupts, at expense of
> efficiency: this might consume more processing power and generate more heat
> than needed, potentially increasing the TCO of a DPDK appliance.
> 
> Here comes DPDKoin. DPDKoin is a DPDK PMD, which instead of moving
> packets, mines cryptocurrencies.
> DPDKoin just does a few calculations to every poll cycle, this means that
> when the network is loaded, DPDKoin consumes just a few cycles, but when
> there is no traffic, DPDKoin mines currencies in a busy loop.
> The coins are mined with no extra consumption, as the CPU would spin
> anyway.

:)

<...>

> +	/* finally assign rx and tx ops */
> +	if (packet_copy) {
> +		eth_dev->rx_pkt_burst = eth_dpdkoin_copy_rx;
> +		eth_dev->tx_pkt_burst = eth_dpdkoin_copy_tx;
> +	} else {
> +		eth_dev->rx_pkt_burst = eth_dpdkoin_rx;
> +		eth_dev->tx_pkt_burst = eth_dpdkoin_tx;
> +	}

This is the biggest give away, but still good job :)