[openib-general] Re: SDP close / linger problem

[Jerome Pioux]

I have attached ttcp.c
I put the culprit code under #ifdef LINGER

Thank you
Jerome


----- Original Message ----- 
From: "Michael S. Tsirkin" <mst at mellanox.co.il>
To: "Jerome Pioux" <jerome.pioux at bull.com>
Cc: <openib-general at openib.org>
Sent: Tuesday, November 08, 2005 12:19 PM
Subject: Re: SDP close / linger problem


> Hmm.
> Is the app small enough to post it here and use to reproduce the
> problem?
> If not, the traces with debug enabled might prove useful.
>
> Quoting Jerome Pioux <jerome.pioux at bull.com>:
>> Subject: SDP close / linger problem
>>
>> Hi Michael,
>>
>> Not sure that my post earlier made it to the forum? ... so, I thought 
>> that I will send it directly to you since you are the SDP person.
>>
>> I have a problem at closure time with client-server apps when using SDP.
>>
>> The problem is that it ALWAYS takes the "LINGER" time value for one or 
>> the other side to complete the close() and regardless of what the value 
>> was set at (2s, 10s 30s, 60s...)
>>
>> >From my understanding, if the LINGER option is set, the close is queued 
>> >up on your send queue behind all other data potentially already queued 
>> >up at the time. But, if there are no data queued up, the close should be 
>> >immediate.
>>
>> On "my" app, this is always the receiver side that experiences the 
>> problem (the app is symetrical this is why there is a LINGER on the 
>> receiver side).
>>
>> I added a close in ttcp (ttcp does not use explicit close) with a linger 
>> time and the sender is now the one that always experiences this problem.
>>
>> I believe that, for both apps, all data have been sent (and received) 
>> correctly before the close - nothing (at least from the app view) is in 
>> the "pipe" (I had the app to report that before the closes).
>>
>> Finally, both app work fine using IPoIB - I meant that for the same 
>> tests, the closes are immediate, regardless of the LINGER values.
>>
>> Any idea please?
>> I can provide traces if needed - please tell me what is needed and how to 
>> get them.
>>
>> Thank you,
>> Jerome
>>
>> ps: ia64 / RHEL4 / 2.6.12 / sn rev 3882
>>
>>
>
> -- 
> MST 
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: ttcp.c
URL: <http://lists.openfabrics.org/pipermail/general/attachments/20051108/83987b0c/attachment.c>