Date: Wed, 22 Feb 2023 16:08:49 -0500 From: mike tancsa <mike@sentex.net> To: Miroslav Lachman <000.fbsd@quip.cz>, Alan Somers <asomers@freebsd.org> Cc: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: speeding up zfs send | recv (update) Message-ID: <46455168-d7f1-6ca9-ad2f-9bcd3359e0f3@sentex.net> In-Reply-To: <1031e2b0-b245-1dc6-a499-8f4da3796543@quip.cz> References: <866d6937-a4e8-bec3-d61b-07df3065fca9@sentex.net> <CAOtMX2gifUmgqwSKpRGcfzCm_=BX_szNF1AF8WTMfAmbrJ5UWA@mail.gmail.com> <f6ea3387-faf8-4c63-d1e7-906fa397b00b@sentex.net> <a38578c6-b633-249d-90f0-0652377d76c0@quip.cz> <c229a502-fb76-ec6a-a56b-934d3b56e474@sentex.net> <1031e2b0-b245-1dc6-a499-8f4da3796543@quip.cz>
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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 >
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