Hi Everyone,
I've been benchmarking since Meltdown and Spectre updates were released.
The updates include kernel updates, EFI updates and CPU microcode updates.
I don't see a difference based on the benchmarks of the algorithms the
library provides. This makes sense since the isolation fixes should affect
the userland/kernel task switch. The benchmarks don't really make system
calls to incur a penalty. Some system calls are made, but there are not too
many of them.
For example, here is SHA on a Celeron J3455 (Goldmont ISA), which supplies
SHA extensions. Both achieve about 1.2 GiB/s for SHA1, and both achieve
about 535 MiB/s for SHA-256.
- Before patches
<TR><TD>SHA-1<TD>1192<TD>1.68
<TR><TD>SHA-256<TD>537<TD>3.73
- After patches
<TR><TD>SHA-1<TD>1193<TD>1.68
<TR><TD>SHA-256<TD>536<TD>3.74
Jeff
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