[Winpcap-users] Multiple instances
David Chang
dchang at fsautomation.com
Fri May 14 17:57:28 PDT 2010
OK. Then, I think GV is right. This capture load is tiny (<5000
pkts/sec). Any modern PC should be able to handle this traffic. It's
most likely your application code (or the libraries you are using).
One last question, you're keeping all this information in memory,
right? You're not trying to write the data out to a file or database,
are you?
DC
pro2c wrote:
> No: ports, protocol, SID and process name are separated algorithms using
> GetExtendedTcpTable as said by Gerard. I only use the winpcap to get the
> current numbers for data transfers for ports then connect them to that
> table. I read only the headers.
>
>
>
> -----Original Message-----
> From: winpcap-users-bounces at winpcap.org
> [mailto:winpcap-users-bounces at winpcap.org] On Behalf Of David Chang
> Sent: Friday, May 14, 2010 5:57 PM
> To: winpcap-users at winpcap.org
> Subject: Re: [Winpcap-users] Multiple instances
>
> I understand all the fields except SID and Process name.
>
> Are you saying that Process name is just a description of the port (e.g. if
> the port is 80, the process name is firefox)? Or, is it more complex than
> that?
>
> How are you getting the SID from the packet capture? Are you scanning the
> actual payload rather than just the header? If so, your application would
> run much faster if you just captured the header.
>
> DC
>
> ----- Original Message -----
> From: "pro2c" <pro2c at litrca.com>
> To: <winpcap-users at winpcap.org>
> Sent: Friday, May 14, 2010 6:36 AM
> Subject: Re: [Winpcap-users] Multiple instances
>
>
>
>> SRC IP, DST IP, Protocol, Port, SID (process ID), Process name (which is
>> using the port), Upload data (kB), Download data (kB), Upload speed,
>> Download speed.
>>
>>
>>
>> -----Original Message-----
>> From: winpcap-users-bounces at winpcap.org
>> [mailto:winpcap-users-bounces at winpcap.org] On Behalf Of David Chang
>> Sent: Thursday, May 13, 2010 10:54 PM
>> To: winpcap-users at winpcap.org
>> Subject: Re: [Winpcap-users] Multiple instances
>>
>> What statistics are you capturing? For example...
>>
>> Src IP Addr Protocol Port Upload pkts Download pkts
>> ------------ ---------- ------ ----------- -------------
>> 192.168.1.1 TCP 80 2341 2419866
>> 192.168.1.1 UDP 5000 987 1026
>> 192.168.1.2 TCP 80 1298 1672340
>>
>> DC
>>
>> pro2c wrote:
>>
>>> I'm trying to make an active list of computer's ports with download and
>>> upload statistics. So i need 2 instances for 1 port (download & upload)
>>>
>>>
>>> -----Original Message-----
>>> From: winpcap-users-bounces at winpcap.org
>>> [mailto:winpcap-users-bounces at winpcap.org] On Behalf Of David Chang
>>> Sent: Thursday, May 13, 2010 7:49 PM
>>> To: winpcap-users at winpcap.org
>>> Subject: Re: [Winpcap-users] Multiple instances
>>>
>>> Could you use a single filter with 'OR' statements to fulfill the 200
>>> conditions you wish to capture for? Then, handle the resulting packets
>>> in
>>>
>>> your own application? Or will the 200 conditions just get every packet
>>> anyway?
>>>
>>> Could you describe what your application is trying to do?
>>>
>>> DC
>>>
>>> ----- Original Message -----
>>> From: "pro2c" <pro2c at litrca.com>
>>> To: <winpcap-users at winpcap.org>
>>> Sent: Thursday, May 13, 2010 9:25 AM
>>> Subject: Re: [Winpcap-users] Multiple instances
>>>
>>>
>>>
>>>
>>>> It's developed in VB.NET 2.0
>>>> I optimized as far as I could. Maybe .NET is not a fast platform.
>>>> Can send source code to someone who can do VB
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: winpcap-users-bounces at winpcap.org
>>>> [mailto:winpcap-users-bounces at winpcap.org] On Behalf Of Gianluca Varenni
>>>> Sent: Thursday, May 13, 2010 6:13 PM
>>>> To: winpcap-users at winpcap.org
>>>> Subject: Re: [Winpcap-users] Multiple instances
>>>>
>>>> A packet flow if 1.5MB/s is really low. The problem was probably in the
>>>> logic of your application. If I were you, I would definitely review your
>>>> application design to understand what the bottleneck was.
>>>>
>>>> Have a nice day
>>>> GV
>>>>
>>>> --------------------------------------------------
>>>> From: "pro2c" <pro2c at litrca.com>
>>>> Sent: Thursday, May 13, 2010 9:02 AM
>>>> To: <winpcap-users at winpcap.org>
>>>> Subject: Re: [Winpcap-users] Multiple instances
>>>>
>>>>
>>>>
>>>>> Yes, this was my first attempt but at full DL speed (~1,5 MB/s) the CPU
>>>>> usage was to high :( since the packet flow is too large/fast
>>>>>
>>>>>
>>>>> -----Original Message-----
>>>>> From: winpcap-users-bounces at winpcap.org
>>>>> [mailto:winpcap-users-bounces at winpcap.org] On Behalf Of Gianluca
>>>>> Varenni
>>>>> Sent: Thursday, May 13, 2010 4:59 PM
>>>>> To: winpcap-users at winpcap.org
>>>>> Subject: Re: [Winpcap-users] Multiple instances
>>>>>
>>>>> If memory is an issue, then the best solution is opening a single
>>>>> instance
>>>>> of the WinPcap device, and do your own filtering and demultiplexing in
>>>>> user
>>>>> mode. This could have the good side effect of having less kernel-user
>>>>> mode
>>>>> transitions to bring the packets to user mode applications.
>>>>>
>>>>> Have a nice day
>>>>> GV
>>>>>
>>>>> --------------------------------------------------
>>>>> From: "pro2c" <pro2c at litrca.com>
>>>>> Sent: Thursday, May 13, 2010 5:37 AM
>>>>> To: <winpcap-users at winpcap.org>
>>>>> Subject: Re: [Winpcap-users] Multiple instances
>>>>>
>>>>>
>>>>>
>>>>>> No, not 200 instances of my app but 200 instances of winpcap device to
>>>>>> have
>>>>>> 200 different filters (for each port).
>>>>>>
>>>>>>
>>>>>> -----Original Message-----
>>>>>> From: winpcap-users-bounces at winpcap.org
>>>>>> [mailto:winpcap-users-bounces at winpcap.org] On Behalf Of David Chang
>>>>>> Sent: Wednesday, May 12, 2010 10:08 PM
>>>>>> To: winpcap-users at winpcap.org
>>>>>> Subject: Re: [Winpcap-users] Multiple instances
>>>>>>
>>>>>> Why are you running 200 instances of your application on a single
>>>>>> computer? Do you have 200 NICs? Maybe you can change your
>>>>>> application
>>>>>> to do more processing in one instance (i.e. multi-threading).
>>>>>>
>>>>>> DC
>>>>>>
>>>>>> pro2c wrote:
>>>>>>
>>>>>>
>>>>>>> I'm having some problems with multiple instances. When I load 200
>>>>>>> instances the memory use of my app reaches 100MB. I'm guessing that
>>>>>>> every instance reserves some mem for itself.
>>>>>>>
>>>>>>> Can this be lowered somehow?
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>> ------------------------------------------------------------------------
>>>
>>>
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>>>>>>>
>>>>>>>
>>>>>>>
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>>>>>>
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>>>>>
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>
>
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