![]() ![]() ![]() We asked Hollingworth if the 32-bit OS will be phased out as more 64-bit compatible models are released? "While we manufacture hardware with 32-bit processors then we will still continue with the 32-bit recommended image. "On Raspberry Pi 4, we use the ARM Large Physical Address Extension (LPAE) to access up to 8GB of memory, subject to the constraint that any process is limited to accessing 3GB (we reserve the top 1GB of the virtual address space for the kernel)," Hollingworth explains. However, for those boards, the 32-bit Raspberry Pi OS still does work around the limit to an extent. There are models which have more than 4GB of RAM and, typically, a 32-bit OS cannot access more than 4GB. The Raspberry Pi 4, and the Compute Module 4 introduced a quandry that hadn't existed in the Pi ecosystem before. Hollingworth clarifies that that performance across the two architectures is not an issue, saying that "there's basically no disadvantage to doing that (people seem to think the 64-bit version is faster to load pages, but in my extensive testing it seems it's not as easy to prove this is the case, benchmarks run faster, but often that doesn't translate to actual page loading/interaction improvements)" The current workaround, detailed in the blog post, requires us to install the 32-bit Chromium browser. This means that we cannot play media from sites such as Disney+ and Netflix. At this time, there is no 64-bit support for Widevine DRM. There’s however one issue with using the 64-bit version of Chromium installed by default: the WidevineCDM library is not available making it impossible to play streaming video from premium services such as Netflix or Disney+.This is not an issue, per se, but there is one workaround that we need to employ. But with the first stable release, video acceleration works through Chromium and VLC, GPU acceleration works through Mesa, and hopefully, some of the performance regressions are resolved, so it can perform more or less as well, or in some cases better, than the 32-bit version. When I tested Raspberry Pi OS 64-bit on Raspberry Pi 4 in June 2020 I actually noted some performance regressions against Raspberry Pi 32-bit OS, and at the time there were some known issues such as the lack of hardware video decoding in VLC and Chromium. Some of the main reasons to finally release a 64-bit version include improved software compatibility with many closed-source applications only available for arm64, and some open-source ones not fully optimized for the armhf port, some performance benefits, and the ability for a process to make use of the full 8GB RAM, removing the 3GB limit when using LPAE (Large Physical Address Extension) on 32-bit operating systems. ![]() The Raspberry Pi Foundation has now officially released Raspberry Pi OS 64-bit about two years after the first beta version was released.ĭespite some potential performance benefits from using 64-bit code instead of 32-bit, the Raspberry Pi Foundation has resisted moving too quickly to a 64-bit OS because if it would create two separate worlds for their earlier 32-bit boards like Raspberry Pi 2 or Raspberry Pi Zero, and the newer 64-bit boards starting with Raspberry Pi 3 onwards and may confuse users besides the extra workloads. ![]()
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