Date: Tue, 09 Feb 2016 20:11:16 +0100 From: Juraj Bocinec <juraj.bocinec@lain.sk> To: Venkateswara Rao Dokku <dvrao.584@gmail.com> Cc: freebsd-drivers@freebsd.org, owner-freebsd-drivers@freebsd.org Subject: Re: SCP issue on FreeBSD Message-ID: <686449bd2840e86a391cc6f4771c3403@mam.nameserver.sk> In-Reply-To: <CACiOAODLd3=K6qsEE__=QaZQmvQZ_i8-4mOsR3FzM5BzzQRC_A@mail.gmail.com> References: <CACiOAODLd3=K6qsEE__=QaZQmvQZ_i8-4mOsR3FzM5BzzQRC_A@mail.gmail.com>
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Greetings, i'm no expert but doesn't this have to do something with network send/receive buffers? They're not set the same by default: [root@schizo /etc]# sysctl -a|grep send kern.cam.ada.ada_send_ordered: 1 kern.cam.da.da_send_ordered: 1 net.local.stream.sendspace: 8192 net.inet.ip.sendsourcequench: 0 net.inet.igmp.sendlocal: 1 net.inet.igmp.sendra: 1 net.inet.tcp.sendspace: 32768 net.inet.tcp.sendbuf_max: 262144 net.inet.tcp.sendbuf_inc: 8192 net.inet.tcp.sendbuf_auto: 1 net.inet.sctp.sendspace: 233016 net.raw.sendspace: 8192 [root@schizo /etc]# sysctl -a|grep recv net.local.stream.recvspace: 8192 net.local.dgram.recvspace: 4096 net.inet.igmp.recvifkludge: 1 net.inet.tcp.recvspace: 65536 net.inet.tcp.recvbuf_max: 262144 net.inet.tcp.recvbuf_inc: 16384 net.inet.tcp.recvbuf_auto: 1 net.inet.udp.recvspace: 42080 net.inet.sctp.recvspace: 233016 net.inet.raw.recvspace: 9216 net.raw.recvspace: 8192 Juraj Bocinec On 2016-02-09 05:39, Venkateswara Rao Dokku wrote: > Hi, > > I am using FreeBSD 8.4 as guest on top of the linux (ubuntu 14.10) > host. I > observed that, the Pushing a file from FreeBSD is giving good > performance > over Puling a file from other linux box to FreeBSD. > > root@test:~ # *scp ns-10.5-57.7.gz root@10.102.38.202:/root* > root@10.102.38.202's password: > ns-10.5-57.7.gz > 100% > 126MB *63.0MB/s* 00:02 > root@test:~ #* scp root@10.102.38.202:/root/ns-10.5-57.7.gz* . > root@10.102.38.202's password: > ns-10.5-57.7.gz > 100% > 126MB *11.5MB/s* 00:11 > > Why there is a difference between these two?. Any tuning needs to be > done > on the FreeBSD guest to get these two almost same? > > To see, whether its specific to FreeBSD I did the same experiment with > Linux(Ubuntu 14.10) as guest on top of Linux(same host as above). Here > the > output is almost same. > > root@ubuntu:~# *scp root@10.102.38.202:/root/ns-11.1-14.4.gz .* > root@10.102.38.202's password: > ns-11.1-14.4.gz > 100% > 130MB *64.8MB/s* 00:02 > root@ubuntu:~# *scp ns-11.1-14.4.gz root@10.102.38.202:/roo*t > root@10.102.38.202's password: > ns-11.1-14.4.gz > 100% 130MB *64.8MB/s* 00:02 > > > Moreover, in most cases Linux performance is better than FreeBSD. Is > Ubuntu > gives good performance when compared to FreeBSD? > > Any help is much appreciated. > Thanks.
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