Re: When does Linux drop UDP packets?
From: Jaswinder Singh Rajput
Date: Thu Jun 04 2009 - 13:46:01 EST
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
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