[LUGOS] delayed ACK

Miha Tomšič miha.tomsic at gmail.com
Sat Jan 31 23:14:51 CET 2015


Hojla!

Pa poglejmo ali tega kdo ve :)

Po dolgem guglanju in brskanju sem ugotovil, da je moj AFP/netatalk server
počasen kot svinja zaradi "delayed ACK"[1]. Na strani Netatalk sem našel
rešitev za svoj problem [2], ampak žal je rešitev uporabna za nekaj deset
(mogoče 100 :) kernelov nazaj.

Najbližje pridejo navodila za RedHat [3], vendar v mojem kernelu 3.17.7
tega vraga ni :(

Ima kdo idejo, kako si ga pričaram v kernel. Po možnosti brez
patch-recompile-debug-debug...

Hvala in srečno,
Miha

[1] http://en.wikipedia.org/wiki/TCP_delayed_acknowledgment
[2] http://www.netafp.com/tn003-slow-afp-read-performance-90/
[3]
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_MRG/2/html-single/Realtime_Tuning_Guide/index.html#sect-Realtime_Tuning_Guide-General_System_Tuning-Reducing_the_TCP_delayed_ack_timeout
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