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To: Matteo Croce <mcroce@redhat.com>, dev@dpdk.org
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Message-ID: <76858e65-545f-cedc-0094-cc0f4a56aa59@intel.com>
Date: Wed, 1 Apr 2020 14:33:35 +0100
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In-Reply-To: <20200401131044.7259-1-mcroce@redhat.com>
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Subject: Re: [dpdk-dev] [PATCH] net/dpdkoin: add new driver
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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 :)