| To: | Robert Olsson <Robert.Olsson@xxxxxxxxxxx> |
|---|---|
| Subject: | Re: Route cache performance |
| From: | Simon Kirby <sim@xxxxxxxxxxxxx> |
| Date: | Tue, 23 Aug 2005 17:01:58 -0700 |
| Cc: | Eric Dumazet <dada1@xxxxxxxxxxxxx>, netdev@xxxxxxxxxxx |
| In-reply-to: | <17163.32645.202453.145416@robur.slu.se> |
| References: | <20050815213855.GA17832@netnation.com> <43014E27.1070104@cosmosbay.com> <20050823190852.GA20794@netnation.com> <17163.32645.202453.145416@robur.slu.se> |
| Sender: | netdev-bounce@xxxxxxxxxxx |
| User-agent: | Mutt/1.5.9i |
On Tue, Aug 23, 2005 at 09:56:53PM +0200, Robert Olsson wrote:
> Yes your GC does not work at all in your 2.6 setups...Why?
Good question. :)
> echo 50 > /proc/sys/net/ipv4/route/gc_min_interval_ms
The output looks exactly the same with gc_min_interval_ms set to 50.
If I set it to 0, it does change a little but _still_ overflows:
rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|rt_cache|
entries| in_hit|in_slow_|gc_total|gc_ignor|gc_goal_|gc_dst_o|in_hlist|
| | tot| | ed| miss| verflow| _search|
3| 3| 1| 1| 1| 0| 0| 0|
4| 11| 5| 0| 0| 0| 0| 0|
5| 5| 2| 0| 0| 0| 0| 0|
23615| 1| 24002| 15812| 0| 0| 0| 11470|
68692| 0| 46780| 46777| 0| 4687| 0| 4492|
86046| 0| 18763| 18754| 0| 18754| 0| 119|
94884| 0| 9540| 9538| 0| 9538| 0| 47|
104901| 0| 10819| 10817| 0| 10817| 0| 61|
114919| 0| 10817| 10818| 0| 10818| 0| 68|
127424| 0| 13512| 13505| 0| 13505| 0| 74|
131062| 0| 15113| 15106| 0| 15106| 10368| 28|
131062| 0| 12503| 12482| 0| 12482| 11582| 9|
131062| 0| 8146| 8130| 0| 8130| 7530| 5|
131062| 0| 8204| 8194| 0| 8194| 7594| 2|
131062| 0| 8132| 8131| 0| 8131| 7531| 5|
131062| 0| 8196| 8195| 0| 8195| 7595| 4|
131062| 0| 8130| 8129| 0| 8129| 7529| 8|
Something is definitely broken here. Are the interrupts (or in this
case, NAPI) able to starve the gc somehow?
Simon-
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