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First Impressions with the Raspberry Pi 5

3 点作者 alexellisuk超过 1 年前

2 条评论

johnklos超过 1 年前
I&#x27;m a bit confused by some inconsistent things in this article.<p>First, the &quot;2 to 3 times faster&quot; thing is a sales line we&#x27;ve seen multiple places and shouldn&#x27;t be repeated without qualification. Jeff Geerling, for example, says: &quot;The SoC performs between 1.8-2.4x faster on every CPU and system benchmark I&#x27;ve run&quot;<p>Even the Geekbench scores show single core for the Pi 4 is 269, and single core for the Pi 5 is 615. The article says right after:<p>&quot;You can see that the RPi5 is around 3x faster for single-core tasks&quot;<p>That&#x27;s... 2.3 times faster, not 3 times faster. You don&#x27;t round 2.3 up to 3.<p>Second, the article says:<p>&quot;A new RP1 chip takes over I&#x2F;O meaning you now have: 2x USB3 at 5 Gbps (simultaneously) and 1x PCIe channel to run an NVMe. In the past, these shared the same bandwidth, limiting what kind of throughput you could get if you used disk and network together.&quot;<p>We&#x27;re still talking comparing the Raspberry Pi 5 with the Pi 4 here, and the Pi 4 didn&#x27;t share ethernet with USB (the Pi 4&#x27;s gigabit ethernet is via an RGMII link, and USB is via a single PCIe gen 2 lane), so there is no difference in throughput if you use USB and ethernet independently versus using them simultaneously.<p>I get that the Pi 5 is new and people want to get things out quickly, but let&#x27;s not be incorrect about what we write, please and thank you :)
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alexellisuk超过 1 年前
Hi, my name&#x27;s Alex and my main interest in the Raspberry Pi at the moment is for headless use.<p>Think containers, Kubernetes, and server-type workloads with systemd and for CI.<p>That&#x27;s the viewpoint you&#x27;ll get from my write-up, but if you like to do other stuff with it, I&#x27;ve linked to a couple of other places too including Jeff&#x27;s new video on the PCIe port, and the detailed benchmarks by Phoronix.