On Tue, Jul 07, 2009 at 12:51:16PM +0300, Nikos Vassiliadis wrote: > Weongyo Jeong wrote: > >I'm happy to see your device is successfully associated with AP. > >However it seems it's a bad news that you sometimes meet crashes. Does > >a random crash mean a OS hang (e.g. could not type any keys) or no more > >work of network operations? > > It hangs, I cannot use the keyboard and I have to power-cycle it. > It can happen after some time downloading and uploading. It hangs > after 5 to 30 minutes of heavy traffic. By heavy traffic, I mean > the maximum I can get from this device, which is 50KBytes/sec. > > I am not sure what will happen if I let it idle for, let's say > one day, but I haven't had a single crash during times with > low activity, such as ssh traffic. > > >Frankly speaking, for both cases it looks I could not provide any > >solutions without backtraces unless I encountered same problems on my > >environment. It'd better if we can reproduce its problem easily. > > Unfortunately, I have no solid facts to show you. The only strange > thing I've seen and is consistent, is this: > > speed# vmstat -m | grep USBdev ; sleep 1 ; vmstat -m | grep USBdev ; > sleep 1 ; vmstat -m | grep USBdev > USBdev 53 4K - 267579 16,32,128,1024 > USBdev 53 4K - 267612 16,32,128,1024 > USBdev 53 4K - 267642 16,32,128,1024 > speed# > speed# vmstat -m | grep USBdev ; sleep 1 ; vmstat -m | grep USBdev ; > sleep 1 ; vmstat -m | grep USBdev > USBdev 53 4K - 268071 16,32,128,1024 > USBdev 53 4K - 268101 16,32,128,1024 > USBdev 53 4K - 268140 16,32,128,1024 > > And then with some traffic: > speed# ping -i 0.01 192.168.1.1 > /dev/null & > [1] 1777 > speed# vmstat -m | grep USBdev ; sleep 1 ; vmstat -m | grep USBdev ; > sleep 1 ; vmstat -m | grep USBdev > USBdev 53 4K - 270249 16,32,128,1024 > USBdev 58 4K - 271095 16,32,128,1024 > USBdev 56 4K - 272008 16,32,128,1024 > speed# vmstat -m | grep USBdev ; sleep 1 ; vmstat -m | grep USBdev ; > sleep 1 ; vmstat -m | grep USBdev > USBdev 54 4K - 279649 16,32,128,1024 > USBdev 57 4K - 280544 16,32,128,1024 > USBdev 54 4K - 281423 16,32,128,1024 > > I don't know how relevant is the above, but it seemed strange, > so I am posting it...
It's a normal case that in implementation it allocates a memory buffer for transactions. So if it increases without any reduction it'd be a problem. regards, Weongyo Jeong _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
