At 09:42 PM 2/27/00 -0500, you wrote:
>
>
>
>On Mon, 28 Feb 2000, Dennis wrote:
>
>> >So a more stupid precise question:
>> >How did you count it to get the interupts/sec?
>> >Ie did you take a long time average or did you use some little tool
>> >which gave you a more accurate peaks. I can understand if you tested with
>> >some piece of hardware like the smartbits, but from your context it seems
>> >to be from real life traffic
>> > Seems like 110Kpps is already beyond T3 capacity.
>>
>> *yawn* Ever hear of vmstat -i (or /proc/interrupts in linux-speak?)
>>
>
>So maybe BSD knows how to do this; not sure how vmstat -i works: i.e how
>accurate it is, what kind of measurement windows it is.
>Theres no way /proc/interrupts could tell you the rate.
vmstat -i ; sleep 5; vmstats -i
Just subtract and divide by 5...most 4th graders can divide by 5 2nd
graders with a calculator. Its not exact, but pretty close. The same can
easily be done with proc/interrupts. Its not a window, its a count.
Why are you arguing these silly, ridiculous points so easily shown? Are you
trying to prove that the 110k number is not possible or not 100% accurate?
What exactly is your point?
>
>> Lets see, 90Mb/s / (40 * 8) = over 281,000pps max per HSSI, and I said dual
>> HSSIs so thats 560,000pps possible.
>>
>
>Ok so 40 bytes are just IP headers; no framers needed because T1
>technology is synchronous.
>But i was under the impression that a T3 would probably give you a max of
>45Mbps
You really dont know how big an IP header is? Its 20 bytes last I heard.
"synchronous" has nothing to do with it..actually tcp packets will be 44
bytes minimum but a PING for example with 1 byte of data could be only 33
bytes (a 4 byte encapsulation)...40 was just an example.
Serial lines are full-duplex, so 90Mb/s can be transfered at once.
>
>> at least try to do the math before wasting bandwidth on the list please.
>>
>
>Denis, you techno-ruffian God! Please have it in your heart to forgive us
>mere mortals when we sin.
But why do you continue to argue subjects on which you are so poorly
versed? Why must you contradict everything I say? You have a sickness I
think. Get over it please.
DB
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