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Date:	Tue, 05 Jun 2007 13:08:46 -0700
From:	Ben Greear <>
To:	Patrick McHardy <>
Subject: Re: [RFC VLAN 00/10]: VLAN netlink support try 2

Patrick McHardy wrote:
> Ben Greear wrote:
>> Patrick McHardy wrote:
>>> The last VLAN patchset was outdated, sorry about the mixup. These are the
>>> correct patches. The iproute patch I posted was correct, so no repost of
>>> that one.
>> Is there any significant performance penalty in creating VLANs using
>> these patches?
>> If you have a test station handy, could you let us know what 'time'
>> shows for a script
>> creating 4000 VLANs with the old vconfig/ioctl method v/s this new method?
> Not significantly more, for 1000 VLANs I get:
> ip link add:
> real    0m22.836s
> user    0m0.100s
> sys     0m5.850s
> vconfig add:
> real    0m19.739s
> user    0m0.090s
> sys     0m3.600s

Thanks for doing the tests.  That small performance drop seems
fine to me.

> ip -b (batch add):
> real    0m5.239s
> user    0m0.280s
> sys     0m3.480s

And that looks quite interesting!


Ben Greear <>
Candela Technologies Inc

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