From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <580A39D6.9020002@slientuniverse.com> Date: Fri, 21 Oct 2016 23:52:54 +0800 From: tiger MIME-Version: 1.0 References: <580A26A4.5030005@yahoo.com> <1744565.jjMyA2xSBQ@bentobox> <2284104.QWR2gm6sJD@bentobox> In-Reply-To: <2284104.QWR2gm6sJD@bentobox> Content-Type: text/plain; charset="utf-8"; format="flowed" Content-Transfer-Encoding: 8bit Subject: Re: [B.A.T.M.A.N.] High latency with batman-adv on ethernet List-Id: The list for a Better Approach To Mobile Ad-hoc Networking List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Sven Eckelmann Cc: b.a.t.m.a.n@lists.open-mesh.org Hello linus: This is my info lsmod batman_adv 164539 0 bridge 108205 1 batman_adv [root@alarmpi tmp]# ls /sys/class/net/bat0/mesh/ aggregated_ogms bonding distributed_arp_table gw_bandwidth gw_sel_class isolation_mark orig_interval ap_isolation bridge_loop_avoidance fragmentation gw_mode hop_penalty multicast_mode routing_algo [root@alarmpi tmp]# ls /sys/class/net/eth0/batman_adv/ iface_status mesh_iface [root@alarmpi tmp]# batctl nc disable Error - can't open file '/sys/class/net/bat0/mesh/network_coding': No such file or directory The option you called seems not to be compiled into your batman-adv kernel module. Consult the README if you wish to learn more about compiling options into batman-adv. 于 2016年10月21日 23:31, Linus Lüssing 写道: > On Fri, Oct 21, 2016 at 04:31:20PM +0200, johnzeng via B.A.T.M.A.N wrote: >> Date: Fri, 21 Oct 2016 22:31:00 +0800 >> From: johnzeng >> To: b.a.t.m.a.n@lists.open-mesh.org >> Subject: i found time delay is very high and there are more caution info , >> if possible , please give me some advisement > If I remember correctly, then one typical issue for Arch Linux > users was, that Arch compiles batman-adv with network-coding, even > though it is marked as "Experimental". And that introduces high latency > and/or packetloss. > > johnzeug, can you check whether network coding is enabled or > disabled and if it is enabled, whether disabling helps? > > (batctl nc disable) > > And like Sven asked, what batman-adv version are you using. Not > that long ago the network coding default was changed to disabled > by default even if the module is compiled with NC. Maybe you run > an older batman-adv release? > > Regards, Linus > On Freitag, 21. Oktober 2016 16:43:41 CEST Sven Eckelmann wrote: > [...] >>> because i tested between ethernet network port ( i don't test in wifi >>> port ) , whether it will master reason ? >> Should not be the "reason". batman-adv doesn't care much about it. It just >> requires an ethernet compatible device. The re-broadcast is a little bit >> less aggressive on non-wifi devices but this has nothing to do with your >> problem. > Just created a small test setup via ethernet with batman-adv 2016.3 to show > you how the results are here. They were connected via a single cable: > > without batman-adv > ------------------ > > $ ping -c 10 192.168.2.196 > PING 192.168.2.196 (192.168.2.196) 56(84) bytes of data. > 64 bytes from 192.168.2.196: icmp_seq=1 ttl=64 time=0.478 ms > 64 bytes from 192.168.2.196: icmp_seq=2 ttl=64 time=0.682 ms > 64 bytes from 192.168.2.196: icmp_seq=3 ttl=64 time=0.392 ms > 64 bytes from 192.168.2.196: icmp_seq=4 ttl=64 time=0.642 ms > 64 bytes from 192.168.2.196: icmp_seq=5 ttl=64 time=0.574 ms > 64 bytes from 192.168.2.196: icmp_seq=6 ttl=64 time=0.466 ms > 64 bytes from 192.168.2.196: icmp_seq=7 ttl=64 time=0.602 ms > 64 bytes from 192.168.2.196: icmp_seq=8 ttl=64 time=0.619 ms > 64 bytes from 192.168.2.196: icmp_seq=9 ttl=64 time=0.658 ms > 64 bytes from 192.168.2.196: icmp_seq=10 ttl=64 time=0.440 ms > > --- 192.168.2.196 ping statistics --- > 10 packets transmitted, 10 received, 0% packet loss, time 9000ms > rtt min/avg/max/mdev = 0.392/0.555/0.682/0.098 ms > > with batman-adv > --------------- > > $ ping -c 10 10.10.130.66 > PING 10.10.130.66 (10.10.130.66) 56(84) bytes of data. > 64 bytes from 10.10.130.66: icmp_seq=1 ttl=64 time=0.489 ms > 64 bytes from 10.10.130.66: icmp_seq=2 ttl=64 time=0.675 ms > 64 bytes from 10.10.130.66: icmp_seq=3 ttl=64 time=0.552 ms > 64 bytes from 10.10.130.66: icmp_seq=4 ttl=64 time=0.562 ms > 64 bytes from 10.10.130.66: icmp_seq=5 ttl=64 time=0.612 ms > 64 bytes from 10.10.130.66: icmp_seq=6 ttl=64 time=0.573 ms > 64 bytes from 10.10.130.66: icmp_seq=7 ttl=64 time=0.534 ms > 64 bytes from 10.10.130.66: icmp_seq=8 ttl=64 time=0.622 ms > 64 bytes from 10.10.130.66: icmp_seq=9 ttl=64 time=0.454 ms > 64 bytes from 10.10.130.66: icmp_seq=10 ttl=64 time=0.468 ms > > --- 10.10.130.66 ping statistics --- > 10 packets transmitted, 10 received, 0% packet loss, time 8996ms > rtt min/avg/max/mdev = 0.454/0.554/0.675/0.067 ms > > Kind regards, > Sven > > PS: I've changed the subject because it was extremely unspecific and > too long. -- -- ----------------------------------------- SlientUniverse Network Tiger Mobile: 15323845569 Tel:+0086 0755 28378179 ---------------------------------------- Website:http://www.slientuniverse.com