This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "IPFire 2.x development tree".
The branch, master has been updated via 3555cff1028e046dea96b7f9c98fb982b884ca54 (commit) via e898660a30c7fac19e8ba495d6094e7f9a2aa03a (commit) via 707fd3ff72cc486a80424beec7fe76d772503b27 (commit) from 1a200cffc994858c8cad91b9b00093d24f00e79a (commit)
Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below.
- Log ----------------------------------------------------------------- commit 3555cff1028e046dea96b7f9c98fb982b884ca54 Merge: e898660 707fd3f Author: Arne Fitzenreiter arne_f@ipfire.org Date: Mon May 19 20:07:18 2014 +0200
Merge remote-tracking branch 'arne_f/kernel-test'
commit e898660a30c7fac19e8ba495d6094e7f9a2aa03a Author: Arne Fitzenreiter arne_f@ipfire.org Date: Mon May 19 10:04:06 2014 +0200
kernel: add pie packet sheduler.
commit 707fd3ff72cc486a80424beec7fe76d772503b27 Author: Arne Fitzenreiter arne_f@ipfire.org Date: Wed May 14 09:20:40 2014 +0200
kernel: update to 3.10.40.
-----------------------------------------------------------------------
Summary of changes: .../kernel/kernel.config.armv5tel-ipfire-kirkwood | 1 + config/kernel/kernel.config.armv5tel-ipfire-multi | 1 + config/kernel/kernel.config.armv5tel-ipfire-rpi | 1 + config/kernel/kernel.config.i586-ipfire | 7 +- config/kernel/kernel.config.i586-ipfire-pae | 1 + config/rootfiles/common/armv5tel/linux-kirkwood | 1 + config/rootfiles/common/armv5tel/linux-multi | 1 + config/rootfiles/common/armv5tel/linux-rpi | 1 + config/rootfiles/common/i586/linux | 1 + config/rootfiles/packages/linux-pae | 1 + lfs/linux | 13 +- src/patches/linux-3.10.39-pie_packet_sch.patch | 674 +++++++++++++++++++++ 12 files changed, 695 insertions(+), 8 deletions(-) create mode 100644 src/patches/linux-3.10.39-pie_packet_sch.patch
Difference in files: diff --git a/config/kernel/kernel.config.armv5tel-ipfire-kirkwood b/config/kernel/kernel.config.armv5tel-ipfire-kirkwood index 2d9b115..9bc1d43 100644 --- a/config/kernel/kernel.config.armv5tel-ipfire-kirkwood +++ b/config/kernel/kernel.config.armv5tel-ipfire-kirkwood @@ -953,6 +953,7 @@ CONFIG_NET_SCH_CHOKE=m CONFIG_NET_SCH_QFQ=m CONFIG_NET_SCH_CODEL=m CONFIG_NET_SCH_FQ_CODEL=m +CONFIG_NET_SCH_PIE=m CONFIG_NET_SCH_INGRESS=m CONFIG_NET_SCH_PLUG=m
diff --git a/config/kernel/kernel.config.armv5tel-ipfire-multi b/config/kernel/kernel.config.armv5tel-ipfire-multi index dcc177d..127542f 100644 --- a/config/kernel/kernel.config.armv5tel-ipfire-multi +++ b/config/kernel/kernel.config.armv5tel-ipfire-multi @@ -1142,6 +1142,7 @@ CONFIG_NET_SCH_CHOKE=m CONFIG_NET_SCH_QFQ=m CONFIG_NET_SCH_CODEL=m CONFIG_NET_SCH_FQ_CODEL=m +CONFIG_NET_SCH_PIE=m CONFIG_NET_SCH_INGRESS=m CONFIG_NET_SCH_PLUG=m
diff --git a/config/kernel/kernel.config.armv5tel-ipfire-rpi b/config/kernel/kernel.config.armv5tel-ipfire-rpi index 0c9b3d2..2c709cc 100644 --- a/config/kernel/kernel.config.armv5tel-ipfire-rpi +++ b/config/kernel/kernel.config.armv5tel-ipfire-rpi @@ -888,6 +888,7 @@ CONFIG_NET_SCH_CHOKE=m CONFIG_NET_SCH_QFQ=m CONFIG_NET_SCH_CODEL=m CONFIG_NET_SCH_FQ_CODEL=m +CONFIG_NET_SCH_PIE=m CONFIG_NET_SCH_INGRESS=m CONFIG_NET_SCH_PLUG=m
diff --git a/config/kernel/kernel.config.i586-ipfire b/config/kernel/kernel.config.i586-ipfire index 246e436..ba63a29 100644 --- a/config/kernel/kernel.config.i586-ipfire +++ b/config/kernel/kernel.config.i586-ipfire @@ -1,6 +1,6 @@ # # Automatically generated file; DO NOT EDIT. -# Linux/x86 3.10.33 Kernel Configuration +# Linux/x86 3.10.39 Kernel Configuration # # CONFIG_64BIT is not set CONFIG_X86_32=y @@ -913,6 +913,8 @@ CONFIG_NETFILTER_XT_MATCH_HELPER=m CONFIG_NETFILTER_XT_MATCH_HL=m CONFIG_NETFILTER_XT_MATCH_IPRANGE=m # CONFIG_NETFILTER_XT_MATCH_IPVS is not set +CONFIG_NETFILTER_XT_MATCH_LAYER7=m +# CONFIG_NETFILTER_XT_MATCH_LAYER7_DEBUG is not set CONFIG_NETFILTER_XT_MATCH_LENGTH=m CONFIG_NETFILTER_XT_MATCH_LIMIT=m CONFIG_NETFILTER_XT_MATCH_MAC=m @@ -931,8 +933,6 @@ CONFIG_NETFILTER_XT_MATCH_RECENT=m CONFIG_NETFILTER_XT_MATCH_SCTP=m CONFIG_NETFILTER_XT_MATCH_SOCKET=m CONFIG_NETFILTER_XT_MATCH_STATE=m -CONFIG_NETFILTER_XT_MATCH_LAYER7=m -# CONFIG_NETFILTER_XT_MATCH_LAYER7_DEBUG is not set CONFIG_NETFILTER_XT_MATCH_STATISTIC=m CONFIG_NETFILTER_XT_MATCH_STRING=m CONFIG_NETFILTER_XT_MATCH_TCPMSS=m @@ -1140,6 +1140,7 @@ CONFIG_NET_SCH_CHOKE=m CONFIG_NET_SCH_QFQ=m CONFIG_NET_SCH_CODEL=m CONFIG_NET_SCH_FQ_CODEL=m +CONFIG_NET_SCH_PIE=m CONFIG_NET_SCH_INGRESS=m CONFIG_NET_SCH_PLUG=m
diff --git a/config/kernel/kernel.config.i586-ipfire-pae b/config/kernel/kernel.config.i586-ipfire-pae index 8dc185b..88e557a 100644 --- a/config/kernel/kernel.config.i586-ipfire-pae +++ b/config/kernel/kernel.config.i586-ipfire-pae @@ -1152,6 +1152,7 @@ CONFIG_NET_SCH_CHOKE=m CONFIG_NET_SCH_QFQ=m CONFIG_NET_SCH_CODEL=m CONFIG_NET_SCH_FQ_CODEL=m +CONFIG_NET_SCH_PIE=m CONFIG_NET_SCH_INGRESS=m CONFIG_NET_SCH_PLUG=m
diff --git a/config/rootfiles/common/armv5tel/linux-kirkwood b/config/rootfiles/common/armv5tel/linux-kirkwood index 9cb3057..4880b60 100644 --- a/config/rootfiles/common/armv5tel/linux-kirkwood +++ b/config/rootfiles/common/armv5tel/linux-kirkwood @@ -2243,6 +2243,7 @@ lib/modules/KVER-ipfire-kirkwood #lib/modules/KVER-ipfire-kirkwood/kernel/net/sched/sch_mqprio.ko #lib/modules/KVER-ipfire-kirkwood/kernel/net/sched/sch_multiq.ko #lib/modules/KVER-ipfire-kirkwood/kernel/net/sched/sch_netem.ko +#lib/modules/KVER-ipfire-kirkwood/kernel/net/sched/sch_pie.ko #lib/modules/KVER-ipfire-kirkwood/kernel/net/sched/sch_plug.ko #lib/modules/KVER-ipfire-kirkwood/kernel/net/sched/sch_prio.ko #lib/modules/KVER-ipfire-kirkwood/kernel/net/sched/sch_qfq.ko diff --git a/config/rootfiles/common/armv5tel/linux-multi b/config/rootfiles/common/armv5tel/linux-multi index 1fd840c..3c20c52 100644 --- a/config/rootfiles/common/armv5tel/linux-multi +++ b/config/rootfiles/common/armv5tel/linux-multi @@ -2195,6 +2195,7 @@ lib/modules/KVER-ipfire-multi #lib/modules/KVER-ipfire-multi/kernel/net/sched/sch_mqprio.ko #lib/modules/KVER-ipfire-multi/kernel/net/sched/sch_multiq.ko #lib/modules/KVER-ipfire-multi/kernel/net/sched/sch_netem.ko +#lib/modules/KVER-ipfire-multi/kernel/net/sched/sch_pie.ko #lib/modules/KVER-ipfire-multi/kernel/net/sched/sch_plug.ko #lib/modules/KVER-ipfire-multi/kernel/net/sched/sch_prio.ko #lib/modules/KVER-ipfire-multi/kernel/net/sched/sch_qfq.ko diff --git a/config/rootfiles/common/armv5tel/linux-rpi b/config/rootfiles/common/armv5tel/linux-rpi index 2ea9efe..01f9312 100644 --- a/config/rootfiles/common/armv5tel/linux-rpi +++ b/config/rootfiles/common/armv5tel/linux-rpi @@ -1804,6 +1804,7 @@ lib/modules/KVER-ipfire-rpi #lib/modules/KVER-ipfire-rpi/kernel/net/sched/sch_mqprio.ko #lib/modules/KVER-ipfire-rpi/kernel/net/sched/sch_multiq.ko #lib/modules/KVER-ipfire-rpi/kernel/net/sched/sch_netem.ko +#lib/modules/KVER-ipfire-rpi/kernel/net/sched/sch_pie.ko #lib/modules/KVER-ipfire-rpi/kernel/net/sched/sch_plug.ko #lib/modules/KVER-ipfire-rpi/kernel/net/sched/sch_prio.ko #lib/modules/KVER-ipfire-rpi/kernel/net/sched/sch_qfq.ko diff --git a/config/rootfiles/common/i586/linux b/config/rootfiles/common/i586/linux index 48bd9ce..fac2631 100644 --- a/config/rootfiles/common/i586/linux +++ b/config/rootfiles/common/i586/linux @@ -2663,6 +2663,7 @@ lib/modules/KVER-ipfire #lib/modules/KVER-ipfire/kernel/net/sched/sch_mqprio.ko #lib/modules/KVER-ipfire/kernel/net/sched/sch_multiq.ko #lib/modules/KVER-ipfire/kernel/net/sched/sch_netem.ko +#lib/modules/KVER-ipfire/kernel/net/sched/sch_pie.ko #lib/modules/KVER-ipfire/kernel/net/sched/sch_plug.ko #lib/modules/KVER-ipfire/kernel/net/sched/sch_prio.ko #lib/modules/KVER-ipfire/kernel/net/sched/sch_qfq.ko diff --git a/config/rootfiles/packages/linux-pae b/config/rootfiles/packages/linux-pae index eaaa3e5..fdba462 100644 --- a/config/rootfiles/packages/linux-pae +++ b/config/rootfiles/packages/linux-pae @@ -2675,6 +2675,7 @@ lib/modules/KVER-ipfire-pae #lib/modules/KVER-ipfire-pae/kernel/net/sched/sch_mqprio.ko #lib/modules/KVER-ipfire-pae/kernel/net/sched/sch_multiq.ko #lib/modules/KVER-ipfire-pae/kernel/net/sched/sch_netem.ko +#lib/modules/KVER-ipfire-pae/kernel/net/sched/sch_pie.ko #lib/modules/KVER-ipfire-pae/kernel/net/sched/sch_plug.ko #lib/modules/KVER-ipfire-pae/kernel/net/sched/sch_prio.ko #lib/modules/KVER-ipfire-pae/kernel/net/sched/sch_qfq.ko diff --git a/lfs/linux b/lfs/linux index 2bf32d3..5dd5cc0 100644 --- a/lfs/linux +++ b/lfs/linux @@ -24,10 +24,10 @@
include Config
-VER = 3.10.39 +VER = 3.10.40
RPI_PATCHES = linux-3.10.38-grsec-1b49b45 -GRS_PATCHES = grsecurity-2.9.1-3.10.39-ipfire1.patch.xz +GRS_PATCHES = grsecurity-2.9.1-3.10.40-ipfire1.patch.xz
THISAPP = linux-$(VER) DL_FILE = linux-$(VER).tar.xz @@ -36,7 +36,7 @@ DIR_APP = $(DIR_SRC)/$(THISAPP) CFLAGS = CXXFLAGS =
-PAK_VER = 44 +PAK_VER = 45 DEPS = ""
VERSUFIX=ipfire$(KCFG) @@ -74,9 +74,9 @@ $(DL_FILE) = $(URL_IPFIRE)/$(DL_FILE) rpi-patches-$(RPI_PATCHES).patch.xz = $(URL_IPFIRE)/rpi-patches-$(RPI_PATCHES).patch.xz $(GRS_PATCHES) = $(URL_IPFIRE)/$(GRS_PATCHES)
-$(DL_FILE)_MD5 = 74db7cc558a1a72ebf5044d286e2bc47 +$(DL_FILE)_MD5 = c1dca08f0f1a60f29b7caa9ff45582a8 rpi-patches-$(RPI_PATCHES).patch.xz_MD5 = a7408e8bad57b4b2cb677dd5a0bfb7ff -$(GRS_PATCHES)_MD5 = 6296b7ec4146544249075249e338ceb3 +$(GRS_PATCHES)_MD5 = f46506dd67e459fc41d60d0641323668
install : $(TARGET)
@@ -120,6 +120,9 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects)) # Layer7-patch cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.10-layer7-filter.patch
+ # pie packet scheduler + cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux-3.10.39-pie_packet_sch.patch + # Grsecurity-patches ifneq "$(KCFG)" "-headers" cd $(DIR_APP) && xz -c -d $(DIR_DL)/$(GRS_PATCHES) | patch -Np1 diff --git a/src/patches/linux-3.10.39-pie_packet_sch.patch b/src/patches/linux-3.10.39-pie_packet_sch.patch new file mode 100644 index 0000000..6bec374 --- /dev/null +++ b/src/patches/linux-3.10.39-pie_packet_sch.patch @@ -0,0 +1,674 @@ +From d4b36210c2e6ecef0ce52fb6c18c51144f5c2d88 Mon Sep 17 00:00:00 2001 +From: Vijay Subramanian vijaynsu@cisco.com +Date: Sat, 4 Jan 2014 17:33:55 -0800 +Subject: 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 + +diff -Naur linux-3.10.39.org/include/uapi/linux/pkt_sched.h linux-3.10.39/include/uapi/linux/pkt_sched.h +--- linux-3.10.39.org/include/uapi/linux/pkt_sched.h 2014-05-06 16:56:24.000000000 +0200 ++++ linux-3.10.39/include/uapi/linux/pkt_sched.h 2014-05-15 10:33:08.296828477 +0200 +@@ -744,4 +744,29 @@ + }; + }; + ++/* PIE */ ++enum { ++ TCA_PIE_UNSPEC, ++ TCA_PIE_TARGET, ++ TCA_PIE_LIMIT, ++ TCA_PIE_TUPDATE, ++ TCA_PIE_ALPHA, ++ TCA_PIE_BETA, ++ TCA_PIE_ECN, ++ TCA_PIE_BYTEMODE, ++ __TCA_PIE_MAX ++}; ++#define TCA_PIE_MAX (__TCA_PIE_MAX - 1) ++ ++struct tc_pie_xstats { ++ __u32 prob; /* current probability */ ++ __u32 delay; /* current delay in ms */ ++ __u32 avg_dq_rate; /* current average dq_rate in bits/pie_time */ ++ __u32 packets_in; /* total number of packets enqueued */ ++ __u32 dropped; /* packets dropped due to pie_action */ ++ __u32 overlimit; /* dropped due to lack of space in queue */ ++ __u32 maxq; /* maximum queue size */ ++ __u32 ecn_mark; /* packets marked with ecn*/ ++}; ++ + #endif +diff -Naur linux-3.10.39.org/net/sched/Kconfig linux-3.10.39/net/sched/Kconfig +--- linux-3.10.39.org/net/sched/Kconfig 2014-05-06 16:56:24.000000000 +0200 ++++ linux-3.10.39/net/sched/Kconfig 2014-05-15 09:30:29.866632326 +0200 +@@ -272,6 +272,19 @@ + + If unsure, say N. + ++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 +diff -Naur linux-3.10.39.org/net/sched/Makefile linux-3.10.39/net/sched/Makefile +--- linux-3.10.39.org/net/sched/Makefile 2014-05-06 16:56:24.000000000 +0200 ++++ linux-3.10.39/net/sched/Makefile 2014-05-15 10:34:55.533502406 +0200 +@@ -39,6 +39,7 @@ + obj-$(CONFIG_NET_SCH_QFQ) += sch_qfq.o + obj-$(CONFIG_NET_SCH_CODEL) += sch_codel.o + obj-$(CONFIG_NET_SCH_FQ_CODEL) += sch_fq_codel.o ++obj-$(CONFIG_NET_SCH_PIE) += sch_pie.o + + obj-$(CONFIG_NET_CLS_U32) += cls_u32.o + obj-$(CONFIG_NET_CLS_ROUTE4) += cls_route.o +diff -Naur linux-3.10.39.org/net/sched/sch_pie.c linux-3.10.39/net/sched/sch_pie.c +--- linux-3.10.39.org/net/sched/sch_pie.c 1970-01-01 01:00:00.000000000 +0100 ++++ linux-3.10.39/net/sched/sch_pie.c 2014-05-15 09:30:29.869966724 +0200 +@@ -0,0 +1,555 @@ ++/* Copyright (C) 2013 Cisco Systems, Inc, 2013. ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License ++ * as published by the Free Software Foundation; either version 2 ++ * of the License. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * Author: Vijay Subramanian vijaynsu@cisco.com ++ * Author: Mythili Prabhu mysuryan@cisco.com ++ * ++ * ECN support is added by Naeem Khademi naeemk@ifi.uio.no ++ * University of Oslo, Norway. ++ */ ++ ++#include <linux/module.h> ++#include <linux/slab.h> ++#include <linux/types.h> ++#include <linux/kernel.h> ++#include <linux/errno.h> ++#include <linux/skbuff.h> ++#include <net/pkt_sched.h> ++#include <net/inet_ecn.h> ++ ++#define QUEUE_THRESHOLD 10000 ++#define DQCOUNT_INVALID -1 ++#define MAX_PROB 0xffffffff ++#define PIE_SCALE 8 ++ ++/* parameters used */ ++struct pie_params { ++ psched_time_t target; /* user specified target delay in pschedtime */ ++ u32 tupdate; /* timer frequency (in jiffies) */ ++ u32 limit; /* number of packets that can be enqueued */ ++ u32 alpha; /* alpha and beta are between -4 and 4 */ ++ u32 beta; /* and are used for shift relative to 1 */ ++ bool ecn; /* true if ecn is enabled */ ++ bool bytemode; /* to scale drop early prob based on pkt size */ ++}; ++ ++/* variables used */ ++struct pie_vars { ++ u32 prob; /* probability but scaled by u32 limit. */ ++ psched_time_t burst_time; ++ psched_time_t qdelay; ++ psched_time_t qdelay_old; ++ u64 dq_count; /* measured in bytes */ ++ psched_time_t dq_tstamp; /* drain rate */ ++ u32 avg_dq_rate; /* bytes per pschedtime tick,scaled */ ++ u32 qlen_old; /* in bytes */ ++}; ++ ++/* statistics gathering */ ++struct pie_stats { ++ u32 packets_in; /* total number of packets enqueued */ ++ u32 dropped; /* packets dropped due to pie_action */ ++ u32 overlimit; /* dropped due to lack of space in queue */ ++ u32 maxq; /* maximum queue size */ ++ u32 ecn_mark; /* packets marked with ECN */ ++}; ++ ++/* private data for the Qdisc */ ++struct pie_sched_data { ++ struct pie_params params; ++ struct pie_vars vars; ++ struct pie_stats stats; ++ struct timer_list adapt_timer; ++}; ++ ++static void pie_params_init(struct pie_params *params) ++{ ++ params->alpha = 2; ++ params->beta = 20; ++ params->tupdate = usecs_to_jiffies(30 * USEC_PER_MSEC); /* 30 ms */ ++ params->limit = 1000; /* default of 1000 packets */ ++ params->target = PSCHED_NS2TICKS(20 * NSEC_PER_MSEC); /* 20 ms */ ++ params->ecn = false; ++ params->bytemode = false; ++} ++ ++static void pie_vars_init(struct pie_vars *vars) ++{ ++ vars->dq_count = DQCOUNT_INVALID; ++ vars->avg_dq_rate = 0; ++ /* default of 100 ms in pschedtime */ ++ vars->burst_time = PSCHED_NS2TICKS(100 * NSEC_PER_MSEC); ++} ++ ++static bool drop_early(struct Qdisc *sch, u32 packet_size) ++{ ++ struct pie_sched_data *q = qdisc_priv(sch); ++ u32 rnd; ++ u32 local_prob = q->vars.prob; ++ u32 mtu = psched_mtu(qdisc_dev(sch)); ++ ++ /* If there is still burst allowance left skip random early drop */ ++ if (q->vars.burst_time > 0) ++ return false; ++ ++ /* If current delay is less than half of target, and ++ * if drop prob is low already, disable early_drop ++ */ ++ if ((q->vars.qdelay < q->params.target / 2) ++ && (q->vars.prob < MAX_PROB / 5)) ++ return false; ++ ++ /* If we have fewer than 2 mtu-sized packets, disable drop_early, ++ * similar to min_th in RED ++ */ ++ if (sch->qstats.backlog < 2 * mtu) ++ return false; ++ ++ /* If bytemode is turned on, use packet size to compute new ++ * probablity. Smaller packets will have lower drop prob in this case ++ */ ++ if (q->params.bytemode && packet_size <= mtu) ++ local_prob = (local_prob / mtu) * packet_size; ++ else ++ local_prob = q->vars.prob; ++ ++ rnd = net_random(); ++ if (rnd < local_prob) ++ return true; ++ ++ return false; ++} ++ ++static int pie_qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch) ++{ ++ struct pie_sched_data *q = qdisc_priv(sch); ++ bool enqueue = false; ++ ++ if (unlikely(qdisc_qlen(sch) >= sch->limit)) { ++ q->stats.overlimit++; ++ goto out; ++ } ++ ++ if (!drop_early(sch, skb->len)) { ++ enqueue = true; ++ } else if (q->params.ecn && (q->vars.prob <= MAX_PROB / 10) && ++ INET_ECN_set_ce(skb)) { ++ /* If packet is ecn capable, mark it if drop probability ++ * is lower than 10%, else drop it. ++ */ ++ q->stats.ecn_mark++; ++ enqueue = true; ++ } ++ ++ /* we can enqueue the packet */ ++ if (enqueue) { ++ q->stats.packets_in++; ++ if (qdisc_qlen(sch) > q->stats.maxq) ++ q->stats.maxq = qdisc_qlen(sch); ++ ++ return qdisc_enqueue_tail(skb, sch); ++ } ++ ++out: ++ q->stats.dropped++; ++ return qdisc_drop(skb, sch); ++} ++ ++static const struct nla_policy pie_policy[TCA_PIE_MAX + 1] = { ++ [TCA_PIE_TARGET] = {.type = NLA_U32}, ++ [TCA_PIE_LIMIT] = {.type = NLA_U32}, ++ [TCA_PIE_TUPDATE] = {.type = NLA_U32}, ++ [TCA_PIE_ALPHA] = {.type = NLA_U32}, ++ [TCA_PIE_BETA] = {.type = NLA_U32}, ++ [TCA_PIE_ECN] = {.type = NLA_U32}, ++ [TCA_PIE_BYTEMODE] = {.type = NLA_U32}, ++}; ++ ++static int pie_change(struct Qdisc *sch, struct nlattr *opt) ++{ ++ struct pie_sched_data *q = qdisc_priv(sch); ++ struct nlattr *tb[TCA_PIE_MAX + 1]; ++ unsigned int qlen; ++ int err; ++ ++ if (!opt) ++ return -EINVAL; ++ ++ err = nla_parse_nested(tb, TCA_PIE_MAX, opt, pie_policy); ++ if (err < 0) ++ return err; ++ ++ sch_tree_lock(sch); ++ ++ /* convert from microseconds to pschedtime */ ++ if (tb[TCA_PIE_TARGET]) { ++ /* target is in us */ ++ u32 target = nla_get_u32(tb[TCA_PIE_TARGET]); ++ ++ /* convert to pschedtime */ ++ q->params.target = PSCHED_NS2TICKS((u64)target * NSEC_PER_USEC); ++ } ++ ++ /* tupdate is in jiffies */ ++ if (tb[TCA_PIE_TUPDATE]) ++ q->params.tupdate = usecs_to_jiffies(nla_get_u32(tb[TCA_PIE_TUPDATE])); ++ ++ if (tb[TCA_PIE_LIMIT]) { ++ u32 limit = nla_get_u32(tb[TCA_PIE_LIMIT]); ++ ++ q->params.limit = limit; ++ sch->limit = limit; ++ } ++ ++ if (tb[TCA_PIE_ALPHA]) ++ q->params.alpha = nla_get_u32(tb[TCA_PIE_ALPHA]); ++ ++ if (tb[TCA_PIE_BETA]) ++ q->params.beta = nla_get_u32(tb[TCA_PIE_BETA]); ++ ++ if (tb[TCA_PIE_ECN]) ++ q->params.ecn = nla_get_u32(tb[TCA_PIE_ECN]); ++ ++ if (tb[TCA_PIE_BYTEMODE]) ++ q->params.bytemode = nla_get_u32(tb[TCA_PIE_BYTEMODE]); ++ ++ /* Drop excess packets if new limit is lower */ ++ qlen = sch->q.qlen; ++ while (sch->q.qlen > sch->limit) { ++ struct sk_buff *skb = __skb_dequeue(&sch->q); ++ ++ sch->qstats.backlog -= qdisc_pkt_len(skb); ++ qdisc_drop(skb, sch); ++ } ++ qdisc_tree_decrease_qlen(sch, qlen - sch->q.qlen); ++ ++ sch_tree_unlock(sch); ++ return 0; ++} ++ ++static void pie_process_dequeue(struct Qdisc *sch, struct sk_buff *skb) ++{ ++ ++ struct pie_sched_data *q = qdisc_priv(sch); ++ int qlen = sch->qstats.backlog; /* current queue size in bytes */ ++ ++ /* If current queue is about 10 packets or more and dq_count is unset ++ * we have enough packets to calculate the drain rate. Save ++ * current time as dq_tstamp and start measurement cycle. ++ */ ++ if (qlen >= QUEUE_THRESHOLD && q->vars.dq_count == DQCOUNT_INVALID) { ++ q->vars.dq_tstamp = psched_get_time(); ++ q->vars.dq_count = 0; ++ } ++ ++ /* Calculate the average drain rate from this value. If queue length ++ * has receded to a small value viz., <= QUEUE_THRESHOLD bytes,reset ++ * the dq_count to -1 as we don't have enough packets to calculate the ++ * drain rate anymore The following if block is entered only when we ++ * have a substantial queue built up (QUEUE_THRESHOLD bytes or more) ++ * and we calculate the drain rate for the threshold here. dq_count is ++ * in bytes, time difference in psched_time, hence rate is in ++ * bytes/psched_time. ++ */ ++ if (q->vars.dq_count != DQCOUNT_INVALID) { ++ q->vars.dq_count += skb->len; ++ ++ if (q->vars.dq_count >= QUEUE_THRESHOLD) { ++ psched_time_t now = psched_get_time(); ++ u32 dtime = now - q->vars.dq_tstamp; ++ u32 count = q->vars.dq_count << PIE_SCALE; ++ ++ if (dtime == 0) ++ return; ++ ++ count = count / dtime; ++ ++ if (q->vars.avg_dq_rate == 0) ++ q->vars.avg_dq_rate = count; ++ else ++ q->vars.avg_dq_rate = ++ (q->vars.avg_dq_rate - ++ (q->vars.avg_dq_rate >> 3)) + (count >> 3); ++ ++ /* If the queue has receded below the threshold, we hold ++ * on to the last drain rate calculated, else we reset ++ * dq_count to 0 to re-enter the if block when the next ++ * packet is dequeued ++ */ ++ if (qlen < QUEUE_THRESHOLD) ++ q->vars.dq_count = DQCOUNT_INVALID; ++ else { ++ q->vars.dq_count = 0; ++ q->vars.dq_tstamp = psched_get_time(); ++ } ++ ++ if (q->vars.burst_time > 0) { ++ if (q->vars.burst_time > dtime) ++ q->vars.burst_time -= dtime; ++ else ++ q->vars.burst_time = 0; ++ } ++ } ++ } ++} ++ ++static void calculate_probability(struct Qdisc *sch) ++{ ++ struct pie_sched_data *q = qdisc_priv(sch); ++ u32 qlen = sch->qstats.backlog; /* queue size in bytes */ ++ psched_time_t qdelay = 0; /* in pschedtime */ ++ psched_time_t qdelay_old = q->vars.qdelay; /* in pschedtime */ ++ s32 delta = 0; /* determines the change in probability */ ++ u32 oldprob; ++ u32 alpha, beta; ++ bool update_prob = true; ++ ++ q->vars.qdelay_old = q->vars.qdelay; ++ ++ if (q->vars.avg_dq_rate > 0) ++ qdelay = (qlen << PIE_SCALE) / q->vars.avg_dq_rate; ++ else ++ qdelay = 0; ++ ++ /* If qdelay is zero and qlen is not, it means qlen is very small, less ++ * than dequeue_rate, so we do not update probabilty in this round ++ */ ++ if (qdelay == 0 && qlen != 0) ++ update_prob = false; ++ ++ /* Add ranges for alpha and beta, more aggressive for high dropping ++ * mode and gentle steps for light dropping mode ++ * In light dropping mode, take gentle steps; in medium dropping mode, ++ * take medium steps; in high dropping mode, take big steps. ++ */ ++ if (q->vars.prob < MAX_PROB / 100) { ++ alpha = ++ (q->params.alpha * (MAX_PROB / PSCHED_TICKS_PER_SEC)) >> 7; ++ beta = ++ (q->params.beta * (MAX_PROB / PSCHED_TICKS_PER_SEC)) >> 7; ++ } else if (q->vars.prob < MAX_PROB / 10) { ++ alpha = ++ (q->params.alpha * (MAX_PROB / PSCHED_TICKS_PER_SEC)) >> 5; ++ beta = ++ (q->params.beta * (MAX_PROB / PSCHED_TICKS_PER_SEC)) >> 5; ++ } else { ++ alpha = ++ (q->params.alpha * (MAX_PROB / PSCHED_TICKS_PER_SEC)) >> 4; ++ beta = ++ (q->params.beta * (MAX_PROB / PSCHED_TICKS_PER_SEC)) >> 4; ++ } ++ ++ /* alpha and beta should be between 0 and 32, in multiples of 1/16 */ ++ delta += alpha * ((qdelay - q->params.target)); ++ delta += beta * ((qdelay - qdelay_old)); ++ ++ oldprob = q->vars.prob; ++ ++ /* to ensure we increase probability in steps of no more than 2% */ ++ if (delta > (s32) (MAX_PROB / (100 / 2)) && ++ q->vars.prob >= MAX_PROB / 10) ++ delta = (MAX_PROB / 100) * 2; ++ ++ /* Non-linear drop: ++ * Tune drop probability to increase quickly for high delays(>= 250ms) ++ * 250ms is derived through experiments and provides error protection ++ */ ++ ++ if (qdelay > (PSCHED_NS2TICKS(250 * NSEC_PER_MSEC))) ++ delta += MAX_PROB / (100 / 2); ++ ++ q->vars.prob += delta; ++ ++ if (delta > 0) { ++ /* prevent overflow */ ++ if (q->vars.prob < oldprob) { ++ q->vars.prob = MAX_PROB; ++ /* Prevent normalization error. If probability is at ++ * maximum value already, we normalize it here, and ++ * skip the check to do a non-linear drop in the next ++ * section. ++ */ ++ update_prob = false; ++ } ++ } else { ++ /* prevent underflow */ ++ if (q->vars.prob > oldprob) ++ q->vars.prob = 0; ++ } ++ ++ /* Non-linear drop in probability: Reduce drop probability quickly if ++ * delay is 0 for 2 consecutive Tupdate periods. ++ */ ++ ++ if ((qdelay == 0) && (qdelay_old == 0) && update_prob) ++ q->vars.prob = (q->vars.prob * 98) / 100; ++ ++ q->vars.qdelay = qdelay; ++ q->vars.qlen_old = qlen; ++ ++ /* We restart the measurement cycle if the following conditions are met ++ * 1. If the delay has been low for 2 consecutive Tupdate periods ++ * 2. Calculated drop probability is zero ++ * 3. We have atleast one estimate for the avg_dq_rate ie., ++ * is a non-zero value ++ */ ++ if ((q->vars.qdelay < q->params.target / 2) && ++ (q->vars.qdelay_old < q->params.target / 2) && ++ (q->vars.prob == 0) && ++ (q->vars.avg_dq_rate > 0)) ++ pie_vars_init(&q->vars); ++} ++ ++static void pie_timer(unsigned long arg) ++{ ++ struct Qdisc *sch = (struct Qdisc *)arg; ++ struct pie_sched_data *q = qdisc_priv(sch); ++ spinlock_t *root_lock = qdisc_lock(qdisc_root_sleeping(sch)); ++ ++ spin_lock(root_lock); ++ calculate_probability(sch); ++ ++ /* reset the timer to fire after 'tupdate'. tupdate is in jiffies. */ ++ if (q->params.tupdate) ++ mod_timer(&q->adapt_timer, jiffies + q->params.tupdate); ++ spin_unlock(root_lock); ++ ++} ++ ++static int pie_init(struct Qdisc *sch, struct nlattr *opt) ++{ ++ struct pie_sched_data *q = qdisc_priv(sch); ++ ++ pie_params_init(&q->params); ++ pie_vars_init(&q->vars); ++ sch->limit = q->params.limit; ++ ++ setup_timer(&q->adapt_timer, pie_timer, (unsigned long)sch); ++ mod_timer(&q->adapt_timer, jiffies + HZ / 2); ++ ++ if (opt) { ++ int err = pie_change(sch, opt); ++ ++ if (err) ++ return err; ++ } ++ ++ return 0; ++} ++ ++static int pie_dump(struct Qdisc *sch, struct sk_buff *skb) ++{ ++ struct pie_sched_data *q = qdisc_priv(sch); ++ struct nlattr *opts; ++ ++ opts = nla_nest_start(skb, TCA_OPTIONS); ++ if (opts == NULL) ++ goto nla_put_failure; ++ ++ /* convert target from pschedtime to us */ ++ if (nla_put_u32(skb, TCA_PIE_TARGET, ++ ((u32) PSCHED_TICKS2NS(q->params.target)) / ++ NSEC_PER_USEC) || ++ nla_put_u32(skb, TCA_PIE_LIMIT, sch->limit) || ++ nla_put_u32(skb, TCA_PIE_TUPDATE, jiffies_to_usecs(q->params.tupdate)) || ++ nla_put_u32(skb, TCA_PIE_ALPHA, q->params.alpha) || ++ nla_put_u32(skb, TCA_PIE_BETA, q->params.beta) || ++ nla_put_u32(skb, TCA_PIE_ECN, q->params.ecn) || ++ nla_put_u32(skb, TCA_PIE_BYTEMODE, q->params.bytemode)) ++ goto nla_put_failure; ++ ++ return nla_nest_end(skb, opts); ++ ++nla_put_failure: ++ nla_nest_cancel(skb, opts); ++ return -1; ++ ++} ++ ++static int pie_dump_stats(struct Qdisc *sch, struct gnet_dump *d) ++{ ++ struct pie_sched_data *q = qdisc_priv(sch); ++ struct tc_pie_xstats st = { ++ .prob = q->vars.prob, ++ .delay = ((u32) PSCHED_TICKS2NS(q->vars.qdelay)) / ++ NSEC_PER_USEC, ++ /* unscale and return dq_rate in bytes per sec */ ++ .avg_dq_rate = q->vars.avg_dq_rate * ++ (PSCHED_TICKS_PER_SEC) >> PIE_SCALE, ++ .packets_in = q->stats.packets_in, ++ .overlimit = q->stats.overlimit, ++ .maxq = q->stats.maxq, ++ .dropped = q->stats.dropped, ++ .ecn_mark = q->stats.ecn_mark, ++ }; ++ ++ return gnet_stats_copy_app(d, &st, sizeof(st)); ++} ++ ++static struct sk_buff *pie_qdisc_dequeue(struct Qdisc *sch) ++{ ++ struct sk_buff *skb; ++ skb = __qdisc_dequeue_head(sch, &sch->q); ++ ++ if (!skb) ++ return NULL; ++ ++ pie_process_dequeue(sch, skb); ++ return skb; ++} ++ ++static void pie_reset(struct Qdisc *sch) ++{ ++ struct pie_sched_data *q = qdisc_priv(sch); ++ qdisc_reset_queue(sch); ++ pie_vars_init(&q->vars); ++} ++ ++static void pie_destroy(struct Qdisc *sch) ++{ ++ struct pie_sched_data *q = qdisc_priv(sch); ++ q->params.tupdate = 0; ++ del_timer_sync(&q->adapt_timer); ++} ++ ++static struct Qdisc_ops pie_qdisc_ops __read_mostly = { ++ .id = "pie", ++ .priv_size = sizeof(struct pie_sched_data), ++ .enqueue = pie_qdisc_enqueue, ++ .dequeue = pie_qdisc_dequeue, ++ .peek = qdisc_peek_dequeued, ++ .init = pie_init, ++ .destroy = pie_destroy, ++ .reset = pie_reset, ++ .change = pie_change, ++ .dump = pie_dump, ++ .dump_stats = pie_dump_stats, ++ .owner = THIS_MODULE, ++}; ++ ++static int __init pie_module_init(void) ++{ ++ return register_qdisc(&pie_qdisc_ops); ++} ++ ++static void __exit pie_module_exit(void) ++{ ++ unregister_qdisc(&pie_qdisc_ops); ++} ++ ++module_init(pie_module_init); ++module_exit(pie_module_exit); ++ ++MODULE_DESCRIPTION("Proportional Integral controller Enhanced (PIE) scheduler"); ++MODULE_AUTHOR("Vijay Subramanian"); ++MODULE_AUTHOR("Mythili Prabhu"); ++MODULE_LICENSE("GPL");
hooks/post-receive -- IPFire 2.x development tree