[PATCH v2] RISC-V: Probe misaligned access speed in parallel
patchwork-bot+linux-riscv at kernel.org
patchwork-bot+linux-riscv at kernel.org
Thu Nov 2 13:20:30 PDT 2023
Hello:
This patch was applied to riscv/linux.git (for-next)
by Palmer Dabbelt <palmer at rivosinc.com>:
On Wed, 20 Sep 2023 12:38:01 -0700 you wrote:
> Probing for misaligned access speed takes about 0.06 seconds. On a
> system with 64 cores, doing this in smp_callin() means it's done
> serially, extending boot time by 3.8 seconds. That's a lot of boot time.
>
> Instead of measuring each CPU serially, let's do the measurements on
> all CPUs in parallel. If we disable preemption on all CPUs, the
> jiffies stop ticking, so we can do this in stages of 1) everybody
> except core 0, then 2) core 0.
>
> [...]
Here is the summary with links:
- [v2] RISC-V: Probe misaligned access speed in parallel
https://git.kernel.org/riscv/c/0c37376609da
You are awesome, thank you!
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