birdie the memory activation patterns initially used by rowhammer were mitigated by simple changes such as doubling the refresh rate . The current ones reliably work despite all software and hardware protections released since then
Announcement
Collapse
No announcement yet.
Spectre/Meltdown/L1TF/MDS Mitigation Costs On An Intel Dual Core + HT Laptop
Collapse
X
-
Originally posted by Azrael5 View PostIntel is a mess. I hope in a class action against this scammer!
No problems with openvms on itaniums
- Likes 1
Comment
-
First of all: thanks Michael for performing these benchmarks!
It is not the uArch it's the way Intel implemented their processors, they did some unsafe optimizations, which do not clear all shared resources after use. This could happen with arm as well, as we might have deep pipelines and implementations of the uArch might perform unsafe speculative execution of branches to increase performance.. they just don't do it, as ARM is mostly used on power sensitive devices and executing something "just in case" may waste power.
- Likes 4
Comment
-
Originally posted by Spacefish View PostFirst of all: thanks Michael for performing these benchmarks!
It is not the uArch it's the way Intel implemented their processors, they did some unsafe optimizations, which do not clear all shared resources after use. This could happen with arm as well, as we might have deep pipelines and implementations of the uArch might perform unsafe speculative execution of branches to increase performance.. they just don't do it, as ARM is mostly used on power sensitive devices and executing something "just in case" may waste power.
Comment
-
As someone who has a penchant for using older hardware -- albeit most of it AMD -- this has my attention. The newest piece of hardware I operate is a Skylake equipped dual core laptop with SMT.
Here's hoping Zen 2 isn't too vulnerable and errata ridden.Last edited by ermo; 22 May 2019, 11:43 AM.
- Likes 1
Comment
Comment