diff options
| author | Toke Høiland-Jørgensen <toke@redhat.com> | 2021-12-08 13:45:17 +0100 |
|---|---|---|
| committer | David Ahern <dsahern@kernel.org> | 2021-12-13 20:19:37 -0700 |
| commit | 4b301b87d774a85b01a965f7c8b73449a8e551be (patch) | |
| tree | a8e428787266e36bb47c5aff4a3e2f550e7d9107 /man | |
| parent | 99d09ee9a637b13f2123ba0154212afb81fafc43 (diff) | |
| download | iproute2-4b301b87d774a85b01a965f7c8b73449a8e551be.tar.gz | |
tc: Add support for ce_threshold_value/mask in fq_codel
Commit dfcb63ce1de6 ("fq_codel: generalise ce_threshold marking for subset
of traffic") added support in fq_codel for setting a value and mask that
will be applied to the diffserv/ECN byte to turn on the ce_threshold
feature for a subset of traffic.
This adds support to iproute for setting these values. The parameter is
called ce_threshold_selector and takes a value followed by a
slash-separated mask. Some examples:
# apply ce_threshold to ECT(1) traffic
tc qdisc replace dev eth0 root fq_codel ce_threshold 1ms ce_threshold_selector 0x1/0x3
# apply ce_threshold to ECN-capable traffic marked as diffserv AF22
tc qdisc replace dev eth0 root fq_codel ce_threshold 1ms ce_threshold_selector 0x50/0xfc
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: David Ahern <dsahern@kernel.org>
Diffstat (limited to 'man')
| -rw-r--r-- | man/man8/tc-fq_codel.8 | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/man/man8/tc-fq_codel.8 b/man/man8/tc-fq_codel.8 index 7ee6c269e..84340fe57 100644 --- a/man/man8/tc-fq_codel.8 +++ b/man/man8/tc-fq_codel.8 @@ -20,6 +20,8 @@ BYTES ] [ ] [ .B ce_threshold TIME ] [ +.B ce_threshold_selector +VALUE/MASK ] [ .B memory_limit BYTES ] @@ -89,6 +91,15 @@ sets a threshold above which all packets are marked with ECN Congestion Experienced. This is useful for DCTCP-style congestion control algorithms that require marking at very shallow queueing thresholds. +.SS ce_threshold_selector +sets a filter so that the +.B ce_threshold +feature is applied to only a subset of the traffic seen by the qdisc. If set, the MASK value +will be applied as a bitwise AND to the diffserv/ECN byte of the IP header, and only if the +result of this masking equals VALUE, will the +.B ce_threshold +logic be applied to the packet. + .SH EXAMPLES #tc qdisc add dev eth0 root fq_codel .br |