Re: [PATCH v6 2/3] LoongArch: vDSO: Wire up getrandom() vDSO implementation

[Xi Ruoyao]

On Thu, 2024-09-19 at 09:08 +0200, Christophe Leroy wrote:
> I know nothing about Loongarch assembly and execution performance, but I 
> see that GCC groups operations by 4 when building 
> reference_chacha20_blocks() from vdso_test_chacha, see below.
> 
> Shouldn't you do the same and group ROUNDs by 4 just like I did on 
> powerpc ? 
> (https://github.com/torvalds/linux/blob/master/arch/powerpc/kernel/vdso/vgetrandom-chacha.S)

Maybe.  In theory the scheduling would improve the performance.  I'll
measure if the scheduling will make an observable performance
improvement.

-- 
Xi Ruoyao <xry111@xxxxxxxxxxx>
School of Aerospace Science and Technology, Xidian University