Date: Sat, 14 Mar 2015 07:23:20 -0600 From: Ian Lepore <ian@freebsd.org> To: Brett Wynkoop <freebsd-arm@wynn.com> Cc: Tim Kientzle <tim@kientzle.com>, freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: BeagleBone slow inbound net I/O Message-ID: <1426339400.52318.3.camel@freebsd.org> In-Reply-To: <20150314031542.439cdee3@ivory.wynn.com> References: <20150311165115.32327c5a@ivory.wynn.com> <89CEBFCA-6B94-4F48-8DFD-790E4667632D@kientzle.com> <20150314031542.439cdee3@ivory.wynn.com>
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On Sat, 2015-03-14 at 03:15 -0400, Brett Wynkoop wrote: > On Fri, 13 Mar 2015 23:02:25 -0700 > Tim Kientzle <tim@kientzle.com> wrote: > > > > > > On Mar 11, 2015, at 1:51 PM, Brett Wynkoop <freebsd-arm@wynn.com> > > > wrote: > > > > > > Have I managed to find a network driver issue? Any ideas how to > > > gather more information to help get to the bottom of things? > > > > > > > $ sysctl dev.cpsw > > > > This will dump detailed statistics from the Ethernet hardware and > > driver. > > > > Tim > > > > After a short time while doing nfs i/o > > > [wynkoop@beaglebone ~]$ sysctl dev.cpsw | grep -i error > dev.cpsw.0.stats.RxCrcErrors: 40 > dev.cpsw.0.stats.RxAlignErrors: 32 > dev.cpsw.0.stats.CarrierSenseErrors: 0 [...] > [wynkoop@beaglebone ~]$ sysctl dev.cpsw | grep -i error > dev.cpsw.0.stats.RxCrcErrors: 262 > dev.cpsw.0.stats.RxAlignErrors: 231 > dev.cpsw.0.stats.CarrierSenseErrors: 0 > [wynkoop@beaglebone ~]$ > > So we can see climbing errors. I am not sure how this compares to the > results of others. The above was during the first few minutes of a > buildworld from an nfs share. > > At the same time on the console: > > Mar 14 03:07:47 beaglebone amd[1163]: mountd rpc failed: RPC: Can't > decode result Mar 14 03:11:48 beaglebone amd[1399]: mountd rpc failed: > RPC: Can't decode result > > which makes sense with the above errors I think. On mine: root@bb:/usr/ports/benchmarks/iperf # sysctl dev.cpsw | grep Err dev.cpsw.0.stats.RxCrcErrors: 0 dev.cpsw.0.stats.RxAlignErrors: 0 dev.cpsw.0.stats.CarrierSenseErrors: 0 That's after 3 days of uptime including doing builds over nfs, and all the iperf testing I was doing yesterday (no errors after megabytes of transfers). I wonder if your power supply is failing and injecting transient glitches under heavy load or something? -- Ian
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