From mboxrd@z Thu Jan 1 00:00:00 1970 From: LW@KARO-electronics.de (Lothar =?UTF-8?B?V2HDn21hbm4=?=) Date: Fri, 14 Oct 2016 08:13:49 +0200 Subject: Low network throughput on i.MX28 In-Reply-To: References: <1476313753.2065.11.camel@embedded.rocks> <20161013084807.6a231fdb@ipc1.ka-ro> Message-ID: <20161014081349.1afb22c6@ipc1.ka-ro> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi, On Thu, 13 Oct 2016 21:43:00 +0200 J?rg Krause wrote: > Am 13. Oktober 2016 08:48:07 MESZ, schrieb "Lothar Wa?mann" : > >On Thu, 13 Oct 2016 01:09:13 +0200 J?rg Krause wrote: [...] > >This is the iperf output on a TX28 with current mainline kernel > >(4.8.0-rc5): > >------------------------------------------------------------ > >Client connecting to 192.168.100.1, TCP port 5001 > >TCP window size: 43.8 KByte (default) > >------------------------------------------------------------ > >[ 3] local 192.168.100.56 port 60325 connected with 192.168.100.1 port > >5001 > >[ ID] Interval Transfer Bandwidth > >[ 3] 0.0-10.0 sec 57.5 MBytes 48.2 Mbits/sec > > > >You might check your kernel DEBUG configs (especially > >CONFIG_DEBUG_PAGEALLOC). > > Thanks for sharing the iperf output. What LAN transceiver does the TX28 has assembled? > The ethernet PHY is an SMSC LAN8710A. Lothar Wa?mann