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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:18:53 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:18:53 +0000 |
commit | a0e0018c9a7ef5ce7f6d2c3ae16aecbbd16a8f67 (patch) | |
tree | 8feaf1a1932871b139b3b30be4c09c66489918be /man/man8/tc-pfifo_fast.8 | |
parent | Initial commit. (diff) | |
download | iproute2-a0e0018c9a7ef5ce7f6d2c3ae16aecbbd16a8f67.tar.xz iproute2-a0e0018c9a7ef5ce7f6d2c3ae16aecbbd16a8f67.zip |
Adding upstream version 6.1.0.upstream/6.1.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'man/man8/tc-pfifo_fast.8')
-rw-r--r-- | man/man8/tc-pfifo_fast.8 | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/man/man8/tc-pfifo_fast.8 b/man/man8/tc-pfifo_fast.8 new file mode 100644 index 0000000..baf34b1 --- /dev/null +++ b/man/man8/tc-pfifo_fast.8 @@ -0,0 +1,57 @@ +.TH PFIFO_FAST 8 "10 January 2002" "iproute2" "Linux" +.SH NAME +pfifo_fast \- three-band first in, first out queue + +.SH DESCRIPTION +pfifo_fast is the default qdisc of each interface. + +Whenever an interface is created, the pfifo_fast qdisc is automatically used +as a queue. If another qdisc is attached, it preempts the default +pfifo_fast, which automatically returns to function when an existing qdisc +is detached. + +In this sense this qdisc is magic, and unlike other qdiscs. + +.SH ALGORITHM +The algorithm is very similar to that of the classful +.BR tc-prio (8) +qdisc. +.B pfifo_fast +is like three +.BR tc-pfifo (8) +queues side by side, where packets can be enqueued in any of the three bands +based on their Type of Service bits or assigned priority. + +Not all three bands are dequeued simultaneously - as long as lower bands +have traffic, higher bands are never dequeued. This can be used to +prioritize interactive traffic or penalize 'lowest cost' traffic. + +Each band can be txqueuelen packets long, as configured with +.BR ifconfig (8) +or +.BR ip (8). +Additional packets coming in are not enqueued but are instead dropped. + +See +.BR tc-prio (8) +for complete details on how TOS bits are translated into bands. +.SH PARAMETERS +.TP +txqueuelen +The length of the three bands depends on the interface txqueuelen, as +specified with +.BR ifconfig (8) +or +.BR ip (8). + +.SH BUGS +Does not maintain statistics and does not show up in tc qdisc ls. This is because +it is the automatic default in the absence of a configured qdisc. + +.SH SEE ALSO +.BR tc (8) + +.SH AUTHORS +Alexey N. Kuznetsov, <kuznet@ms2.inr.ac.ru> + +This manpage maintained by bert hubert <ahu@ds9a.nl> |