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| author |   Mohit P. Tahiliani <tahiliani@nitk.edu.in> | 2020-01-22 23:52:33 +0530 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-01-23 11:38:31 +0100 |
| commit | ec97ecf1ebe485a17cd8395a5f35e6b80b57665a (patch) | |
| tree | 2e5491ce3a3ff1b637edf2e24dce419d4c1da678 /include/net | |
| parent | net: sched: pie: export symbols to be reused by FQ-PIE (diff) | |
| download | wireguard-linux-ec97ecf1ebe485a17cd8395a5f35e6b80b57665a.tar.xz wireguard-linux-ec97ecf1ebe485a17cd8395a5f35e6b80b57665a.zip | |
net: sched: add Flow Queue PIE packet scheduler
Principles:
- Packets are classified on flows.
- This is a Stochastic model (as we use a hash, several flows might
be hashed to the same slot)
- Each flow has a PIE managed queue.
- Flows are linked onto two (Round Robin) lists,
so that new flows have priority on old ones.
- For a given flow, packets are not reordered.
- Drops during enqueue only.
- ECN capability is off by default.
- ECN threshold (if ECN is enabled) is at 10% by default.
- Uses timestamps to calculate queue delay by default.
Usage:
tc qdisc ... fq_pie [ limit PACKETS ] [ flows NUMBER ]
[ target TIME ] [ tupdate TIME ]
[ alpha NUMBER ] [ beta NUMBER ]
[ quantum BYTES ] [ memory_limit BYTES ]
[ ecnprob PERCENTAGE ] [ [no]ecn ]
[ [no]bytemode ] [ [no_]dq_rate_estimator ]
defaults:
limit: 10240 packets, flows: 1024
target: 15 ms, tupdate: 15 ms (in jiffies)
alpha: 1/8, beta : 5/4
quantum: device MTU, memory_limit: 32 Mb
ecnprob: 10%, ecn: off
bytemode: off, dq_rate_estimator: off
Signed-off-by: Mohit P. Tahiliani <tahiliani@nitk.edu.in>
Signed-off-by: Sachin D. Patil <sdp.sachin@gmail.com>
Signed-off-by: V. Saicharan <vsaicharan1998@gmail.com>
Signed-off-by: Mohit Bhasi <mohitbhasi1998@gmail.com>
Signed-off-by: Leslie Monis <lesliemonis@gmail.com>
Signed-off-by: Gautam Ramakrishnan <gautamramk@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/pie.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/pie.h b/include/net/pie.h index 90f5db3d29e7..fd5a37cb7993 100644 --- a/include/net/pie.h +++ b/include/net/pie.h @@ -81,9 +81,11 @@ struct pie_stats { /** * struct pie_skb_cb - contains private skb vars * @enqueue_time: timestamp when the packet is enqueued + * @mem_usage: size of the skb during enqueue */ struct pie_skb_cb { psched_time_t enqueue_time; + u32 mem_usage; }; static inline void pie_params_init(struct pie_params *params) |