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

[Leslie]

It's always the flow cpu that spikes up

Tim Eberhard wrote:
> 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 
> <mailto: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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