I have read that there were a number of people having various USB problems. Some related to network, audio, etc. I understand that there is work being done on the USB software. I don't know if the latest version of Raspbian has fixed things or not. I'll be using a USB audio dongle when my R-Pi arrives, so I guess I'll see...
Joe Gray W5JG On Mon, Oct 29, 2012 at 9:48 PM, Peter Bell <[email protected]> wrote: > When I was playing around with the Raspberry PI, one of the things I > noticed that was the networking seemed to behave rather strangely at > times - not bad enough that you could really say it was broken, but > enough to reduce your level of confidence. Since I have previously > used that SMSC USB<->Ethernet bridge chip with no problems, I suspect > it's associated with the USB drivers on the PI. > > Regards, > > Pete > > > On Tue, Oct 30, 2012 at 7:34 AM, Shaun Kelly <[email protected]> wrote: >> On 10/29/12 19:17 , Sarah White wrote: >>> >>> On 10/29/2012 7:53 PM, Chris Albertson wrote: >>>> >>>> I'm curious what load average numbers do you get if you type "uptime" >>>> after running NTP for some hours. >> >> [snips] >> >>>> Basically, I'm thinking this method (raspi + refclock) is a good way to >>>> feed a handfull of public stratum 2 servers which by definition don't >>>> have their own local refclock. >>>> >>>> If you made your raspi stratum 1 server publicly available via >>>> pool.ntp.org it would almost certainly be overloaded. >> >> >> I have a Raspberry Pi in the pool now (ntp.impsec.net), though I've set >> bandwidth low (512k) so I am not seeing a great deal of load: >> >> root@ntp2:/home/pi# uptime >> 19:19:57 up 9 days, 21:54, 1 user, load average: 0.03, 0.08, 0.15 >> >> >> top - 19:20:10 up 9 days, 21:54, 1 user, load average: 0.03, 0.08, 0.15 >> Tasks: 55 total, 1 running, 54 sleeping, 0 stopped, 0 zombie >> %Cpu(s): 0.3 us, 0.2 sy, 0.0 ni, 93.9 id, 5.4 wa, 0.0 hi, 0.2 si, 0.0 >> st >> KiB Mem: 220652 total, 205332 used, 15320 free, 35256 buffers >> KiB Swap: 102396 total, 880 used, 101516 free, 145376 cached >> >> Watching with tcpdump I am seeing only a few packets per second average, >> withg some periods of burstiness where I see maybe 30 packets per second >> where it will maybe get up to 10-15% busy. >> >> [more snips] >> >>>> >>>> Let's assume a raspi can handle 200 packets per second without loosing >>>> performance too badly (limited by cpu load, etc.) >> >> I'd think that's probably close based on what I'm seeing, though again I'm >> just eyeballing tcpdump. Mind you, I'm not using the supported turbo modes >> so there might be some wiggle room with mild overclocking. >> >> >> -Shaun >> (sig pending) >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
