Red Hat Bugzilla – Bug 1253452
Errors on "Reducing the TCP Delayed Ack Timeout" doc
Last modified: 2015-11-11 20:07:48 EST
Description of problem:
There are two errors at the following chapter/section :
2. General System Tuning
2.13. Reducing the TCP delayed ack timeout
at the following statements:
1) "This value defaults to 40ms."
This is the default value on non-rt kernel. On rt kernel it is 4ms.
2) "Write the desired minimum value, in microseconds, to /proc/sys/net/ipv4/tcp_delack_min:"
The correct unit of time is milliseconds, and not microseconds.
Moreover, the patch that implements this feature  also includes the tcp_ato_min knob, but I did not find the documentation for it.
 kernel-rt specific commit:
c00451d MRG: RFC: Nagle latency tuning
[ this bug is the same report of BZ1253448 ]