Hi, On 20-03-15 12:47, Ian Campbell wrote:
Hi all,At work I am in the process of deploying an array of 4 cubietrucks for use in the Xen Project automated test framework. 2 of the 4 boards seem to work just fine in (repeated) pre-commissioning tests but two are failing fairly reliably. One with: Timeout, server not responding. From ssh and the other with networking issues (DNS timeouts etc) during initial installation (Debian installer). These boards are now in a colo, but previously when they were on my desk the same two boards both failed with the ssh Timeout error and the other two were ok, so the problem boards do seem to persist over changes of infrastructure etc. ssh is used to login to the boxes and drive the test case from a controller machine. In this case the failing test is a build job which is building Xen or a Linux kernel etc. All build jobs run natively under Debian (running things under Xen would follow, but it never gets past the build jobs due to this issue). The kernel in use is 3.16.7-ckt2 (Debian revision 1~bpo70+1). The boards are all using u-boot v2014.10. I can't see anything in the logs and the ifconfig stats show now errors. Apart from the hiccough networking seems fine (i.e. subsequent ssh commands do work). Ssh is using "-o BatchMode=yes -o ConnectTimeout=100 -o ServerAliveInterval=100" options and make is invoked with -j4 which doesn't seem too aggressive. In the case of the failing installation /sys/class/net/eth0/statistics/*{dropped,errors} are all 0, nothing in dmesg or the logs. TBH this one might be a cabling or infrastructure issue, but I'm reasonably confident that the ssh one is not. Since two of the boards are OK and two are not I suppose something somewhere must be marginal. I'm not really sure where to start looking. Perhaps CONFIG_GMAC_TX_DELAY on the u-boot side might be relevant?
Yes that is the first thing I was thinking of, the cubietruck is the only gbit phy using a20 design which does not need it, which is kinda fishy. Regards, Hans -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
