[c-nsp] 7201 cpu (revisited)

[Tassos Chatzithomaoglou]

We did some testing on a NPE-G2 for a week and this was the difference from NPE-G1:

http://img84.imageshack.us/img84/905/g1vsg2px4.gif

PPPoE termination, Qos/ACL/netflow per user, simple mcast, plus some basic routing stuff.
We used exactly the same setup (latest SB IOS) and same customers on both engines.

G1 was usually showing drops after 70%-75%, G2 hasn't shown any yet.
If G2 can do anything above 75%, serving x1.5 customers (or x1.5 traffic) of that of G1, without showing any drops, then we'll be 
happy ;)

--
Tassos

Rodney Dunn wrote on 17/3/2008 8:54 μμ:
> Don't worry about it.
> 
> Push more load and the CPU will go up but your overall no drop rate
> and performance is much more with that newer processor.
> 
> The only way you can prove it is either in a lab with testing
> gear or watch from drops with the 'sh int'.
> You will see overruns or ignores once the capacity starts to come
> in to question.
> 
> Not a good answer but it's the only one there for this scenario
> today.
> 
> Rodney
> 
> On Mon, Mar 17, 2008 at 11:52:03AM -0700, Mark Kent wrote:
>>>> Most of your CPU usage comes from interrupts.
>>>> sh int st
>>>> Lets see what your interfaces are doing.
>> GigabitEthernet0/0
>>           Switching path    Pkts In   Chars In   Pkts Out  Chars Out
>>                Processor      58937    6909233      53463    7238990
>>              Route cache 3561281996  824442297 1922951596  564241376
>>                    Total 3561340933  831351530 1923005059  571480366
>> GigabitEthernet0/1
>>           Switching path    Pkts In   Chars In   Pkts Out  Chars Out
>>                Processor      22461    2697899      27968    7456044
>>              Route cache  749956906 3834247096 1271047162 1998558616
>>                    Total  749979367 3836944995 1271075130 2006014660
>> GigabitEthernet0/2
>>           Switching path    Pkts In   Chars In   Pkts Out  Chars Out
>>                Processor          0          0          0          0
>>              Route cache          0          0          0          0
>>                    Total          0          0          0          0
>> GigabitEthernet0/3
>>           Switching path    Pkts In   Chars In   Pkts Out  Chars Out
>>                Processor     767250   64149215     783904   55907587
>>              Route cache 2991435297 3393180667 4107796986  931040113
>>                    Total 2992202547 3457329882 4108580890  986947700
>>
>>
>> Thanks,
>> -mark
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