What version of iperf? Use iperf -v to tell. If you're using iperf 2.0.13 <https://sourceforge.net/projects/iperf2/> try posting the output of interval reports, -i 1 e.g., on both the client and server (tcp) along with the enhanced reports (use -e) for both cases, no SAMBA traffic and with concurrent SAMBA traffic. Also, describe the network, e.g. WiFi, 1G, 10G, and the machines a bit, e.g. number of CPUs.
Bob On Sun, Jul 19, 2020 at 12:07 AM tomas jupe via Iperf-users < iperf-users@lists.sourceforge.net> wrote: > Hey, > > I run "iperf -s" on the samba server and "iperf -c IP-ADDRESS -t 60" on > another machine (linux or windows, tried both) while I simultaneously copy > the files to a machine in the network using the windows file-explorer. > > Only when iperf is running (with either protocols, TCP or UDP) the copying > process gets way faster (from around 100 Kbit/s to 100 Mbit/s). > > It is indeed a very interesting effect, and i cant explain where it comes > from. > > Thank you for any tip or idea. > > > Am 18.07.20 um 22:48 schrieb Sascha Osdoba: > > hi, > > please tell the command line to run iperf on server. > > regards > > 18.07.2020 20:09:54 tomas jupe via Iperf-users > <iperf-users@lists.sourceforge.net> <iperf-users@lists.sourceforge.net>: > > Thank you very much for your idea. > > At first it looked like a possible solution. The CPU-usage is higher with > iperf running (from ~6% to ~25%). > > But when i run "stress" to throttle up the cpu to 100%, the speed of the > copying process is not getting faster. > > Only with iperf running the files are copied faster... > > > So i am still searching for a solution. > > Am 18.07.20 um 18:46 schrieb Vince Conroy: > > This might be a long shot, but maybe the cpu on one or both PCs is being > throttled (reduced clock speed) because of a power setting and running > iperf causes it to throttle up? > > On Sat, Jul 18, 2020, 9:18 AM tomas jupe via Iperf-users < > iperf-users@lists.sourceforge.net> wrote: > >> Hi all, >> >> >> My Samba server only copies files fast when iperf is also running >> simultaneously. >> >> >> I have a samba setup to access files from a Windows-PC. Sadly >> transferring files to it and from it is very slow. >> >> (The windows-pcs are part of a domain managed by the samba server) >> >> Especially when a large number of small files are copied the speed is >> very low. Large files are copied quite fast. >> >> But as soon as a start a speedtest with iperf from another machine to >> that samba server the speed of copying files from the samba server is >> way faster. >> >> As soon as iperf stops the speed of the file copy drops again. >> >> >> Does anyone has an idea why iperf is improving the speed of copying the >> files from a samba server? And what do i have to change in my network to >> keep the high speed. :) >> >> >> Any help is much appreciated. >> >> Thank you very much. >> >> >> >> >> >> >> >> >> _______________________________________________ >> Iperf-users mailing list >> Iperf-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/iperf-users >> > Vince Conroy > West Wave Technology > 707.890.6620 > > > > _______________________________________________ > Iperf-users mailing > listIperf-users@lists.sourceforge.nethttps://lists.sourceforge.net/lists/listinfo/iperf-users > > _______________________________________________ > Iperf-users mailing list > Iperf-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/iperf-users >
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