arp(8) performance w/ many aliases assigned to an interface
Max Laier
max at love2party.net
Wed Jun 9 21:30:32 UTC 2010
On Wednesday 09 June 2010 23:21:05 Max Laier wrote:
> Hello Nick,
>
> On Wednesday 09 June 2010 20:17:43 Nick Rogers wrote:
> > Is there something that can be done to speedup the call to
> > if_indextoname(), or would it be worthwhile for me to submit a patch that
> > adds the ability to skip the interface lookup as an arp(8) option?
>
> how about the attached:
>
> # time arp -an > /dev/null
> 0.171u 0.462s 0:00.63 100.0% 21+1538k 0+0io 0pf+0w
> # time arp.patched -an > /dev/null
> 0.005u 0.000s 0:00.00 0.0% 0+0k 0+0io 0pf+0w
>
> # arp -an | wc -l
> 1095
>
> I'll commit this soon unless somebody objects.
... make that s/long/int64_t/ ... I keep forgetting that long is 32bit
sometimes.
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