From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jarek Poplawski <jarkao2@gmail.com>
Subject: Re: rib_trie / Fix inflate_threshold_root. Now=15 size=11 bits
Date: Mon, 29 Jun 2009 09:27:03 +0000
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Cc: David Miller <davem@davemloft.net>,
	Robert Olsson <robert@robur.slu.se>,
	Robert Olsson <Robert.Olsson@data.slu.se>,
	"Jorge Boncompte [DTI2]" <jorge@dti2.net>,
	Eric Dumazet <dada1@cosmosbay.com>,
	Robert Olsson <robert.olsson@its.uu.se>,
	Linux Network Development list <netdev@vger.kernel.org>
To: =?iso-8859-2?Q?Pawe=B3?= Staszewski <pstaszewski@itcare.pl>
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On Mon, Jun 29, 2009 at 10:47:44AM +0200, Pawe=B3 Staszewski wrote:
> But
> With all this patches i have the same problem with CPU load
> Every time when route cache entries are purged cpu load is increasing=
 =20
> from 1% to 40 / 80% it depends
>
> I see that on 64bit machine when route cache entries are going down i=
 =20
> have almost 80% load on each cpu where ethernet card is binded by =20
> smp_affinity
> But on 32bit machine cpu load reported by mpstat is half that on 64bi=
t =20
> machine
> here is example from 32bit machine ( mpstat + rtstat -k entries )
>
> Linux 2.6.29.5 (TM_02_C1)       06/29/09        _i686_  (2 CPU)
>
> 12:36:54     CPU    %usr   %nice    %sys %iowait    %irq   %soft  %st=
eal =20
> %guest   %idle        RT CACHE ENTRIES (from rtstat)
> 12:36:57     all    0.00    0.00    0.00    0.00    1.51   15.08    0=
=2E00 =20
>   0.00   83.42        83346

I guess Eric is thinking about this. Btw., two little suggestions:
it should be easier to track if these route cache reports stay in its
starting thread ("weird problem"?), and if you could send these
stats/logs as attachements or turn off line wrapping, please? ;-)

Thanks,
Jarek P.