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Author: Admin | 2025-04-27
Test Miner at the Livepeer OfficeA key component for the upcoming Livepeer Streamflow update is new software that allows GPU crypto miners to concurrently run the Livepeer video transcoding software. The video transcoding software takes advantage of the idle video processing ASICs on most commercial GPUs, thus effectively transcodes video while causing minimal disruption to the GPU’s hashrate. This enables GPU miners to participate in the Livepeer network without any additional capital expenditure and dramatically increases the reliability and affordability for the Livepeer network. Since our initial research, the engineering team has made significant progress towards this goal. We would like to share some initial benchmarking results with the Livepeer community.Hardware SpecTo test the software performance, we built a basic test mining rig with the following spec:GPU: 1xNvidia 1080ti (Pascal encoder/decoder)GPU Connection: PCIECPU: Intel Pentium 3.1GHzRAM: 16GBNote that we used a single GPU card. Usually miners can fit 6–12 GPU cards per node. The Livepeer software can do basic load balancing across multiple GPU cards on the same node, but the optimal load balancing mechanism remains an active area of research.Performance BaselineBefore benchmarking, we established our performance baseline by running a live stream transcoding task without also running the mining software. The transcoding task is from a 720p 24fps input video to a {720p 30fps, 360p 30fps, 240p 30fps} multi-bitrate output video. We used H264 as the video codec and HLS as the video communication protocol. This is a common setting for live streaming on the web today.Baseline Transcoding Performance For a Single 1080ti GPUWe can see in the performance baseline, that the software running on a 1080ti starts to drop video segments when attempting to transcode more than four concurrent streams.BenchmarkThe first benchmark we attempted is simulating an HD live video transcoding workflow while running Ethminer. In this workflow,
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