[j-nsp] transfer between 2 ns2000's is slow

[Tim Eberhard]

Leslie,

please issue the "get perf cpu all detail" command to see if which CPU is
going up. I suspect you're hitting an ALG or this is going to CPU for some
odd reason.

-Tim Eberhard

On Tue, Feb 10, 2009 at 1:46 PM, Leslie <leslie at craigslist.org> wrote:

> I'm having a strange problem that I haven't been able to fix after much
> studying --
>
> Basically my setup is host 1 - fw1 - dedicated 1gige link (~25ms lag) -
> router2 - fw2 - host 2
>
> I can blast udp across this pipe without a problem, but tcp traffic seems
> to be limited to about 3 mbyte/s -- I can make multiple sessions that are
> all transferring at this speed, but no individual session will go over that
> "limit"
>
> Another thing that makes me extremely suspicious is occasionally when I
> start a transfer I'll see a brief cpu spike -- like shown below
>
>  get perf cpu detail
> Average System Utilization: 21%
> Last 60 seconds:
> 59: 37    58: 34    57: 38    56: 27    55: 39    54: 38
> 53: 81**  52: 76**  51: 81**  50: 77**  49: 82**  48: 62*
> 47: 36    46: 37    45: 35    44: 36    43: 36    42: 35
> 41: 32    40: 37    39: 33    38: 37    37: 34    36: 39
> 35: 33    34: 38    33: 33    32: 39    31: 33    30: 39
> 29: 31    28: 40    27: 29    26: 42    25: 35    24: 41
> 23: 35    22: 38    21: 31    20: 35    19: 32    18: 41
> 17: 35    16: 38    15: 34    14: 39    13: 35    12: 40
> 11: 33    10: 40     9: 32     8: 39     7: 45     6: 39
>  5: 34     4: 40     3: 35     2: 42     1: 36     0: 39
>
>
> I've obviously spent hours and hours on the phone/email with tac without
> much help.  Does anyone have any ideas of what could be doing this?  Any
> troubleshooting tips?
>
> Thank you
>
> Leslie
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