Re: speeding up zfs send | recv (update)

From: mike tancsa <mike_at_sentex.net>
Date: Wed, 22 Feb 2023 21:08:49 UTC 
On 2/22/2023 4:03 PM, Miroslav Lachman wrote:
> Interresting numbers. I think I am the only one who get best speed 
> with chacha20-poly1305@openssh.com
>
>
> It seems the speed of SSH is limited by single core performance which 
> is very poor on this machine (Intel(R) Pentium(R) Dual  CPU E2160). 
> Even if CPU has 50% idle, ssh runs on 99.8% of single core.

The CPU I have has
aesni0: <AES-CBC,AES-CCM,AES-GCM,AES-ICM,AES-XTS> on motherboard

which probably helps.


>
> I know there were some HPN patches to ssh, beside that is there any 
> option I can try to use less CPU?
>
> I will play with cpuset to pin ssh on one core and everything else on 
> the other core.

It looks like you are running into a CPU bottleneck TBH

     ---Mike


>
>
> Kind regards
> Miroslav Lachman
>