Date: Fri, 20 Mar 2015 11:42:10 +0200 From: =?utf-8?Q?Vaidas_Damo=C5=A1evi=C4=8Dius?= <vd@par.lt> To: Mehmet Erol Sanliturk <m.e.sanliturk@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: Troubles with 'em' driver and UDP packets Message-ID: <E7950DC4-C046-4E18-B4EE-8B31A530E755@par.lt> In-Reply-To: <CAOgwaMuSMVc-pEMB%2BRuqqdiCuBbwuLfpBPF-Oh54R==y-KjtFQ@mail.gmail.com> References: <7F780FA4-E826-4C83-98CC-549FECEDA35E@par.lt> <CAOgwaMuSMVc-pEMB%2BRuqqdiCuBbwuLfpBPF-Oh54R==y-KjtFQ@mail.gmail.com>
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It's not cabling problem :) Another example with -b and -i : vd@v0s4:~ % iperf3 -u -c 1.2.3.4 -i4 -b1000m -P1 Connecting to host 1.2.3.4, port 5201 [ 4] local 1.2.3.3 port 10672 connected to 1.2.3.4 port 5201 [ ID] Interval Transfer Bandwidth Total Datagrams [ 4] 0.00-4.00 sec 446 MBytes 935 Mbits/sec 1761605 =20 [ 4] 4.00-8.00 sec 457 MBytes 958 Mbits/sec 1809551 =20 [ 4] 8.00-10.00 sec 228 MBytes 958 Mbits/sec 900740 =20 - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Jitter = Lost/Total Datagrams [ 4] 0.00-10.00 sec 1.10 GBytes 949 Mbits/sec 770.668 ms 0/35 = (0%) =20 [ 4] Sent 35 datagrams Result is totaly different. > On 20 Mar 2015, at 11:29, Mehmet Erol Sanliturk = <m.e.sanliturk@gmail.com> wrote: >=20 >=20 >=20 > On Fri, Mar 20, 2015 at 2:23 AM, Vaidas Damo=C5=A1evi=C4=8Dius = <vd@par.lt> wrote: > Hello, >=20 > I have 2 boxes with FreeBSD 10.1-RELEASE/amd64 and "Intel(R) PRO/1000 = Network Connection 7.4.2" NIC's directly connected to each other. I = noticed strange problem - I'm loosing small UDP packets under high load. = I've tried to test it with iperf and got the following: >=20 > --- >=20 > vd@v0s4:~ % iperf3 -u -c 1.2.3.4 > Connecting to host 1.2.3.4, port 5201 > [ 4] local 1.2.3.3 port 64254 connected to 1.2.3.4 port 5201 > [ ID] Interval Transfer Bandwidth Total Datagrams > [ 4] 0.00-1.01 sec 120 KBytes 976 Kbits/sec 15 > [ 4] 1.01-2.01 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 2.01-3.01 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 3.01-4.01 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 4.01-5.01 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 5.01-6.01 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 6.01-7.01 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 7.01-8.00 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 8.00-9.01 sec 128 KBytes 1.05 Mbits/sec 16 > [ 4] 9.01-10.01 sec 128 KBytes 1.05 Mbits/sec 16 > - - - - - - - - - - - - - - - - - - - - - - - - - > [ ID] Interval Transfer Bandwidth Jitter = Lost/Total Datagrams > [ 4] 0.00-10.01 sec 1.24 MBytes 1.04 Mbits/sec 0.325 ms 0/159 = (0%) > [ 4] Sent 159 datagrams >=20 > Any advice how to solve it ? >=20 > Thank you. > _______________________________________________ >=20 >=20 >=20 >=20 > I think you use Gigabit CROSS cable ( cat 5e or cat 6 ) . > CROSS cable is required if connection is from computer to computer . >=20 > Only for remaindering . >=20 >=20 >=20 > Thank you very much . >=20 > Mehmet Erol Sanliturk >=20 >=20 >=20 >=20
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