4 ms·
> The power savings delivered by the smaller process geometry have allowed us to replace Cortex-A53 with the much more powerful, out-of-order, Cortex-A72 core;
by elihu 7y ago
> The power savings delivered by the smaller process geometry have allowed us to replace Cortex-A53 with the much more powerful, out-of-order, Cortex-A72 core; this can execute more instructions per clock, yielding performance increases over Raspberry Pi 3B+ of between two and four times, depending on the benchmark.
Looks like the Pi 4 will be vulnerable to Spectre. That's unfortunate, since it seems like this is quite an upgrade otherwise.
https://en.wikipedia.org/wiki/Spectre_(security_vulnerability) https://en.wikipedia.org/wiki/Spectre_(security_vulnerabilit...
> ARM has reported that the majority of their processors are not vulnerable, and published a list of the specific processors that are affected by the Spectre vulnerability: Cortex-R7, Cortex-R8, Cortex-A8, Cortex-A9, Cortex-A15, Cortex-A17, Cortex-A57, Cortex-A72, Cortex-A73 and ARM Cortex-A75 cores.
- jacquesm 7y agoYes, it probably is. But for many use cases that is totally unimportant.
- universenz 7y agoCould you outline/bring clarity to why that is totally unimportant for many use cases?
- lgats 7y agoI suppose most uses of the RBP don't involve running 3rd party code. Although, I do think this is an important issue to address.
- 21717117 7y ago[1]. tl;dr It's just a read-only local privilege escalation exploit, and that _is_ bad if you let malicious code get into your machine. [1] https://www.sweharris.org/post/2018-01-04-meltdown_spectre/ https://www.sweharris.org/post/2018-01-04-meltdown_spectre/
- pulse7 7y agoIn most cases RPI will not be used as a host on which many VMs from different customers will run. Many embedded systems will not have browser with JavaScript enabled. And so on...
- theedwood 7y agoBecause there are still, over a year later, no reported cases of any spectre/meltdown vulnerabilities actively being used in the wild.
- snvzz 7y ago>ARM has reported that the majority of their processors are not vulnerable, and published a list of the specific processors that are affected by the Spectre vulnerability: Cortex-R7, Cortex-R8, Cortex-A8, Cortex-A9, Cortex-A15, Cortex-A17, Cortex-A57, Cortex-A72, Cortex-A73 and ARM Cortex-A75 cores. So, "most not vulnerable", then they proceed to list almost their entire lineup as vulnerable. These PR guys sure are stretching it.