* Re: When does Linux drop UDP packets? [not found] ` <alpine.DEB.2.00.0906041228170.14994@gandalf.stny.rr.com> @ 2009-06-04 17:46 ` Jaswinder Singh Rajput 2009-06-04 21:07 ` Steven Rostedt 0 siblings, 1 reply; 2+ messages in thread From: Jaswinder Singh Rajput @ 2009-06-04 17:46 UTC (permalink / raw) To: Steven Rostedt; +Cc: Philipp Reh, LKML, netdev On Thu, 2009-06-04 at 12:34 -0400, Steven Rostedt wrote: > BTW, I used ftrace to look into this: > > Enable: > > CONFIG_FTRACE > CONFIG_FUNCTION_TRACER > CONFIG_FUNCITON_GRAPH_TRACER > CONFIG_DYNAMIC_FTRACE > > Compile and boot: > > # mount -t debugfs nodev /sys/kernel/debug Very glad to see you following standards ;-) > # cd /sys/kernel/debug hmm you mean # cd /sys/kernel/debug/tracing > # echo udp_rcv > set_graph_function > # echo function_graph > current_tracer > # cat trace > Anyway you can also see UDP packet drops when you increase network and CPU load. -- JSR ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: When does Linux drop UDP packets? 2009-06-04 17:46 ` When does Linux drop UDP packets? Jaswinder Singh Rajput @ 2009-06-04 21:07 ` Steven Rostedt 0 siblings, 0 replies; 2+ messages in thread From: Steven Rostedt @ 2009-06-04 21:07 UTC (permalink / raw) To: Jaswinder Singh Rajput; +Cc: Philipp Reh, LKML, netdev On Thu, 4 Jun 2009, Jaswinder Singh Rajput wrote: > On Thu, 2009-06-04 at 12:34 -0400, Steven Rostedt wrote: > > > BTW, I used ftrace to look into this: > > > > Enable: > > > > CONFIG_FTRACE > > CONFIG_FUNCTION_TRACER > > CONFIG_FUNCITON_GRAPH_TRACER > > CONFIG_DYNAMIC_FTRACE > > > > Compile and boot: > > > > # mount -t debugfs nodev /sys/kernel/debug > > Very glad to see you following standards ;-) I only did that to not hear the debugfs nazis squack. > > > # cd /sys/kernel/debug > > hmm you mean # cd /sys/kernel/debug/tracing A mistake I would not have made if I just did /debug > > > # echo udp_rcv > set_graph_function > > # echo function_graph > current_tracer > > # cat trace > > > > Anyway you can also see UDP packet drops when you increase network and > CPU load. That's not the issue here. -- Steve ^ permalink raw reply [flat|nested] 2+ messages in thread
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2009-06-04 17:46 ` When does Linux drop UDP packets? Jaswinder Singh Rajput
2009-06-04 21:07 ` Steven Rostedt
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