76 lines
2.7 KiB
Plaintext
76 lines
2.7 KiB
Plaintext
#
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# For a description of the syntax of this configuration file,
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# see misc/tools/kconfig-language.txt.
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#
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menu "Network I/O Buffer Support"
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config NET_IOB
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bool "Enable generic network I/O buffer support"
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default n
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---help---
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This setting will build the networking I/O buffer (IOB) support
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library.
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if NET_IOB
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config IOB_NBUFFERS
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int "Number of pre-allocated network I/O buffers"
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default 24 if (NET_TCP_WRITE_BUFFERS && !NET_TCP_READAHEAD) || (!NET_TCP_WRITE_BUFFERS && NET_TCP_READAHEAD)
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default 36 if NET_TCP_WRITE_BUFFERS && NET_TCP_READAHEAD
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default 8 if !NET_TCP_WRITE_BUFFERS && !NET_TCP_READAHEAD
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---help---
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Each packet is represented by a series of small I/O buffers in a
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chain. This setting determines the number of preallocated I/O
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buffers available for packet data.
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config IOB_BUFSIZE
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int "Payload size of one network I/O buffer"
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default 196
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---help---
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Each packet is represented by a series of small I/O buffers in a
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chain. This setting determines the data payload each preallocated
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I/O buffer.
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config IOB_NCHAINS
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int "Number of pre-allocated I/O buffer chain heads"
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default 0 if !NET_TCP_READAHEAD && !NET_UDP_READAHEAD
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default 8 if NET_TCP_READAHEAD || NET_UDP_READAHEAD
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---help---
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These tiny nodes are used as "containers" to support queueing of
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I/O buffer chains. This will limit the number of I/O transactions
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that can be "in-flight" at any give time. The default value of
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zero disables this features.
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These generic I/O buffer chain containers are not currently used
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by any logic in NuttX. That is because their other other specialized
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I/O buffer chain containers that also carry a payload of usage
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specific information.
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config IOB_THROTTLE
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int "I/O buffer throttle value"
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default 0 if !NET_TCP_WRITE_BUFFERS || !NET_TCP_READAHEAD
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default 8 if NET_TCP_WRITE_BUFFERS && NET_TCP_READAHEAD
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depends on NET_TCP_WRITE_BUFFERS && NET_TCP_READAHEAD
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---help---
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TCP write buffering and read-ahead buffer use the same pool of free
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I/O buffers. In order to prevent uncontrolled incoming TCP packets
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from hogging all of the available, pre-allocated I/O buffers, a
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throttling value is required. This throttle value assures that
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I/O buffers will be denied to the read-ahead logic before TCP writes
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are halted.
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config IOB_DEBUG
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bool "Force I/O buffer debug"
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default n
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depends on DEBUG
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---help---
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This option will force debug output from I/O buffer logic,
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even without network debug output. This is not normally something
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that would want to do but is convenient if you are debugging the
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I/O buffer logic and do not want to get overloaded with other
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network-related debug output.
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endif # NET_IOB
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endmenu # Network I/O buffer support
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