News for hackers. Stuff that matters.

A comment on Spectre mitigations murder userspace performance. Parent comment

Re:Spectre mitigations murder userspace performance by foobarbazetc on Saturday June 19, 2021 @08:04PM (#27565751)
Yeah, this is mostly an issue in the cloud where you share SMT threads with other people.
[ Parent | on HN ]
Re:Spectre mitigations murder userspace performance by chithanh on Saturday June 19, 2021 @10:24PM (#27566541)
To be more precise, running different cloud customers on different SMT threads of the same core allows them to attack each other.

This is also the case with Spectre-related vulnerabilities such as L1TF.

[ Parent | on HN ]