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authorVijay Subramanian <vijaynsu@cisco.com>2014-01-04 17:33:55 -0800
committerDavid S. Miller <davem@davemloft.net>2014-01-06 15:13:01 -0500
commitd4b36210c2e6ecef0ce52fb6c18c51144f5c2d88 (patch)
tree686e19ccf2eff5feff262178651ba8724ad96427 /net/sched/Kconfig
parent83111e7fe85f2dc8b61e463c71b971f4998d8e53 (diff)
downloadlinux-d4b36210c2e6ecef0ce52fb6c18c51144f5c2d88.tar.bz2
net: pkt_sched: PIE AQM scheme
Proportional Integral controller Enhanced (PIE) is a scheduler to address the bufferbloat problem. >From the IETF draft below: " Bufferbloat is a phenomenon where excess buffers in the network cause high latency and jitter. As more and more interactive applications (e.g. voice over IP, real time video streaming and financial transactions) run in the Internet, high latency and jitter degrade application performance. There is a pressing need to design intelligent queue management schemes that can control latency and jitter; and hence provide desirable quality of service to users. We present here a lightweight design, PIE(Proportional Integral controller Enhanced) that can effectively control the average queueing latency to a target value. Simulation results, theoretical analysis and Linux testbed results have shown that PIE can ensure low latency and achieve high link utilization under various congestion situations. The design does not require per-packet timestamp, so it incurs very small overhead and is simple enough to implement in both hardware and software. " Many thanks to Dave Taht for extensive feedback, reviews, testing and suggestions. Thanks also to Stephen Hemminger and Eric Dumazet for reviews and suggestions. Naeem Khademi and Dave Taht independently contributed to ECN support. For more information, please see technical paper about PIE in the IEEE Conference on High Performance Switching and Routing 2013. A copy of the paper can be found at ftp://ftpeng.cisco.com/pie/. Please also refer to the IETF draft submission at http://tools.ietf.org/html/draft-pan-tsvwg-pie-00 All relevant code, documents and test scripts and results can be found at ftp://ftpeng.cisco.com/pie/. For problems with the iproute2/tc or Linux kernel code, please contact Vijay Subramanian (vijaynsu@cisco.com or subramanian.vijay@gmail.com) Mythili Prabhu (mysuryan@cisco.com) Signed-off-by: Vijay Subramanian <subramanian.vijay@gmail.com> Signed-off-by: Mythili Prabhu <mysuryan@cisco.com> CC: Dave Taht <dave.taht@bufferbloat.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/Kconfig')
-rw-r--r--net/sched/Kconfig13
1 files changed, 13 insertions, 0 deletions
diff --git a/net/sched/Kconfig b/net/sched/Kconfig
index d3d7a0a66e28..a1a8e29e5fc9 100644
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -295,6 +295,19 @@ config NET_SCH_HHF
To compile this driver as a module, choose M here: the module
will be called sch_hhf.
+config NET_SCH_PIE
+ tristate "Proportional Integral controller Enhanced (PIE) scheduler"
+ help
+ Say Y here if you want to use the Proportional Integral controller
+ Enhanced scheduler packet scheduling algorithm.
+ For more information, please see
+ http://tools.ietf.org/html/draft-pan-tsvwg-pie-00
+
+ To compile this driver as a module, choose M here: the module
+ will be called sch_pie.
+
+ If unsure, say N.
+
config NET_SCH_INGRESS
tristate "Ingress Qdisc"
depends on NET_CLS_ACT