On Mon, 2 Apr 2007 11:43:19 +1000 CaT <[EMAIL PROTECTED]> wrote: > I take minute by minute snapshots of network traffic by sampling > /proc/net/dev and most of the time everything works fine. Occasionally > though I get petabyte byte traffic and corresponding packet traffic.
How frequently? Are you able to provide some actual numbers (expected and actual values), so we can look at the bit patterns? > This happens on an AMD64, dual core smp box with Broadcom NetXtreme II > nics. What driver drivers that? b44.c? > The issue happens with both nics but at different times. The same > sampling code runs on p4 boxes with ht on and e1000 nics without issues > so I don't believe it's an issue with my code (famous last words :) > which just does an re to extract the data on a per-line basis and prints > it out. Still, I'll be adding code to log any big readings and hopefully > it'll happen again sooner rather then later. > > There is no preemption involved and the kernel is a monolythic build of > 2.6.19.[12] (there are two servers). We do perform racy 64-bit updates of some of the stats counters. But that'll only affect 32-bit kernels and I'm assuming you're running a 64-bit kernel on that AMD64 box (are you?) Plus it's odd that both the byte-counters and the packet-counters go wonky at the same time. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
