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TCP: Difference between revisions
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* netdev 2009-03-11, "[http://patchwork.ozlabs.org/patch/24296/ TCP rx window autotuning harmful at LAN context]" | * netdev 2009-03-11, "[http://patchwork.ozlabs.org/patch/24296/ TCP rx window autotuning harmful at LAN context]" | ||
* The Pittsburgh Supercomputing Center's [http://www.psc.edu/networking/projects/tcptune/#Linux Linux TCP notes] | * The Pittsburgh Supercomputing Center's [http://www.psc.edu/networking/projects/tcptune/#Linux Linux TCP notes] | ||
===TCP auto-tuning on FreeBSD=== | |||
* Finally introduced in [FreeBSD 7.2] by [http://people.freebsd.org/~andre/ Andre Oppermann]: | |||
<pre>With TCP send buffer auto scaling and the default values below it supports 20Mbit/s at 100ms and 10Mbit/s at 200ms. Both read and write buffer are auto-sized.</pre> | |||
== See also == | == See also == | ||
* [[Linux APIs#IPPROTO_TCP|Linux's]] TCP socket options | * [[Linux APIs#IPPROTO_TCP|Linux's]] TCP socket options | ||
* [[FreeBSD APIs#IPPROTO_TCP|FreeBSD's]] TCP socket options | * [[FreeBSD APIs#IPPROTO_TCP|FreeBSD's]] TCP socket options | ||
Revision as of 15:00, 19 June 2009
- http://articles.techrepublic.com.com/5100-10878_11-1050878.html -- "TCP/IP options for high-performance data transmission"
- http://www.ussg.iu.edu/hypermail/linux/kernel/0102.0/0943.html -- LKML thread, "TCP_NOPUSH on FreeBSD, TCP_CORK on Linux"
- http://www.irbs.net/internet/postfix/0707/1097.html -- postfix thread, "dkim-milter signing terribly slow with Postfix, but not with sendmail"
- This becomes: "TCP_NODELAY, TCP_CORK, TCP_NOPUSH, etc (was: dkim-milter signing terribly slow...)"
Portable APIs
- TCP_NODELAY: Disable Nagle's algorithm (coalescing of small packets until an ACK is received or a retransmission triggered). See the Linux APIs page for interactions with TCP_CORK on that platform.
Tuning
TCP auto-tuning on Linux
- netdev 2009-03-11, "TCP rx window autotuning harmful at LAN context"
- The Pittsburgh Supercomputing Center's Linux TCP notes
TCP auto-tuning on FreeBSD
- Finally introduced in [FreeBSD 7.2] by Andre Oppermann:
With TCP send buffer auto scaling and the default values below it supports 20Mbit/s at 100ms and 10Mbit/s at 200ms. Both read and write buffer are auto-sized.
