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Re: [lwip-users] Efficient sending small data packets
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From: |
Daniel Doron |
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Subject: |
Re: [lwip-users] Efficient sending small data packets |
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Date: |
Tue, 12 Nov 2013 19:34:26 +0000 |
The nagle algorithm can be disabled...
Daniel
"Pomeroy, Marty" <address@hidden> wrote:
-----Original Message-----
It worked but I noticed a relatively big latency (about 200ms or more)
between arrival of buf_n and buf_n+1.
Where does it come from? How lwip stack schedule an actual transmission
upon receipt of tcp_output?
If your receiving PC is running Windows, 200ms is a "smoking gun" for
Nagle's Algorithm. Google that up.
On windows fix this by opening the Registry, go to
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\In
terfaces
Find the correct interface under there by IP Address
Add these DWORD values
"TcpAckFrequency" DWORD 1
"TCPNoDelay" DWORD 1
Then restart the PC.
HTH!
Marty
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