WSA(Send/Recv)XXXX all support scatter gathering which is equiverlent to MDL
chains.
Bi
-----Original Message-----
From: Maxim S. Shatskih [mailto:xxxxx@storagecraft.com]
Sent: Wednesday, December 04, 2002 6:30 PM
To: NT Developers Interest List
Subject: [ntdev] RE: TDI client driver Vs. user mode sockets applicati on
Yes, and we also have the send/recv versions which take MDL chains instead
of PVOID Buffer/ULONG Length.
Max
----- Original Message -----
From: Jamey mailto:xxxxx Kirby
To: NT Developers Interest List mailto:xxxxx
Sent: Thursday, December 05, 2002 4:37 AM
Subject: [ntdev] RE: TDI client driver Vs. user mode sockets applicati on
Our Berkeley library for kernel mode supplies several extra functions,
SendToAsync() for example, that have additional parameters to supply a
completion routine and a context. Using this implementation, we are able to
far out perform WinSock; as one would expect in kernel mode.
Jamey
-----Original Message-----
From: xxxxx@lists.osr…com
mailto:xxxxx
[mailto:xxxxx@lists.osr.com] On Behalf Of Bi Chen
Sent: Wednesday, December 04, 2002 3:38 PM
To: NT Developers Interest List
Subject: [ntdev] RE: TDI client driver Vs. user mode sockets applicati on
BSD socket is inefficient to be used on server that must handle large about
of concurrent TCP connections or UDP requests on Windows Platform because
it lacks of nonblocking or overlapped caps. One can use select to relief the
problem somewhat, but not much. In any cases, there will be heck lot of
thread context switching and using a lot of threads. Using Overlapped
WinSocket along with IO completion port and/or OS (Windows) provided thread
pool, saves all those boatload of overhead.
On Linux, it is a bit different story. However, Liunx community, especially
Oralce realize that blocking BSD socket and lack of asynchronies IO is hugh
drag in their quest to beat server performance of Windows. They are adding
those in 2.5 kerenl.
Bi
-----Original Message-----
From: Maxim S. Shatskih [mailto:xxxxx@storagecraft.com
mailto:xxxxx]
Sent: Wednesday, December 04, 2002 2:53 PM
To: NT Developers Interest List
Subject: [ntdev] RE: TDI client driver Vs. user mode sockets applicati
on
RE: [ntdev] RE: TDI client driver Vs. user mode sockets applicationIn what
respect namely the BSD socket model is inefficient?
Max
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