Introduction to Mediatek QoS
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1 Introduction to Mediatek QoS 2013/7/16 Copyright MediaTek Inc. All rights reserved.
2 Outline Overview of QoS Web UI SW QoS (TC, traffic control) DRR SPQ Mixed Fairness QoS HW QoS (QDMA, MT7621) Replace DRR Replace SPQ Replace Mixed Test Result Copyright MediaTek Inc. All rights reserved. 2013/7/15 1
3 Outline Overview of QoS Web UI SW QoS (TC, traffic control) DRR SPQ Mixed Fairness QoS HW QoS (QDMA, MT7621) Replace DRR Replace SPQ Replace Mixed Test Result(DRR for example) Copyright MediaTek Inc. All rights reserved. 2013/7/15 2
4 Mediatek QoS Web UI Copyright MediaTek Inc. All rights reserved. 2013/7/15 3
5 Mediatek QoS Web UI Mediatek SW QoS supports these classifiers currently: a) SRC/DSP IP address (with netmask) b) Packet length c) DSCP field d) ICMP, TCP/UDP port range e) Layer 7 (content inspection) Copyright MediaTek Inc. All rights reserved. 2013/7/15 4
6 Outline Overview of QoS Web UI SW QoS (TC, traffic control) DRR SPQ Mixed Fairness QoS HW QoS (QDMA, MT7621) Replace DRR Replace SPQ Replace Mixed Test Result(DRR for example) Copyright MediaTek Inc. All rights reserved. 2013/7/15 5
7 QoS Model : DRR(HTB, Rate limited) packet Copyright MediaTek Inc. All rights reserved. 2013/7/15 6 HTB Child pfifo (64) Class HTB Child pfifo (64) Class HTB Child pfifo (64) Class HTB Child pfifo (64) Class packet
8 QoS Model : DRR(HTB, Rate limited) Four QoS groups are shown after specifying Global settings in Ralink SW QoS. Now all packets through this gateway are classified into these four QoS groups according to the user s QoS rules settings. The four QoS groups are subsequently shown. Copyright MediaTek Inc. All rights reserved. 2013/7/15 7
9 QoS Model : DRR(HTB, Rate limited) Copyright MediaTek Inc. All rights reserved. 2013/7/15 8
10 Outline Overview of QoS Web UI SW QoS (TC, traffic control) DRR SPQ Mixed Fairness QoS HW QoS (QDMA, MT7621) Replace DRR Replace SPQ Test Result(DRR for example) Copyright MediaTek Inc. All rights reserved. 2013/7/15 9
11 QoS Model : SPQ(PRIO, Priority schedule) packet pfifo (64) pfifo (64) pfifo (64) pfifo (64) high low packet Copyright MediaTek Inc. All rights reserved. 2013/7/15 10
12 SPQ (Priority, upload, UDP)
13 Outline Overview of QoS Web UI SW QoS (TC, traffic control) DRR SPQ Mixed Fairness QoS HW QoS (QDMA, MT7621) Replace DRR Replace SPQ Replace Mixed Test Result(DRR for example) Copyright MediaTek Inc. All rights reserved. 2013/7/15 12
14 QoS Model : Mixed(SPQ+HTB) PRIO pfifo (64) high packet pfifo (64) HTB HTB Child pfifo (64) Class HTB Child pfifo (64) Class Copyright MediaTek Inc. All rights reserved. 2013/7/15 13 low packet
15 QoS Model : Mixed(SPQ+HTB) Copyright MediaTek Inc. All rights reserved. 2013/7/15 14
16 Outline Overview of QoS Web UI SW QoS (TC, traffic control) DRR SPQ Mixed Fairness QoS HW QoS (QDMA, MT7621) Replace DRR Replace SPQ Replace Mixed Test Result(DRR for example) Copyright MediaTek Inc. All rights reserved. 2013/7/15 15
17 QoS Model : fairness QoS Fairness QoS does not shape traffic but only schedules the transmission of packets, based on 'flows'. The goal is to ensure fairness so that each flow is able to send data in turn, thus preventing any single flow from drowning out the rest. Copyright MediaTek Inc. All rights reserved. 2013/7/15 16
18 QoS Model : fairness QoS Test condition: 9 pair Copyright MediaTek Inc. All rights reserved. 2013/7/15 17
19 No fairness QoS Throughput >15Mbps Not fair Throughput =0 Mbps fairness QoS All pair throughput = 5~6 Mbps Almost fainrness Copyright MediaTek Inc. All rights reserved. 2013/7/15 18
20 Outline Overview of QoS Web UI SW QoS (TC, traffic control) DRR SPQ Mixed Fairness QoS HW QoS (QDMA, MT7621) Replace DRR Replace SPQ Replace Mixed Test Result Copyright MediaTek Inc. All rights reserved. 2013/7/15 19
21 How to Classify Packets We want to set these four priority. VI = min 50Mbps, max = unlimited (Highest) VO = min 20Mbps, max = unlimited(high) BK = min 5Mbps, max = unlimited(default) BG = min 1Mbps, max = unlimited (Low) We can use DSCP value as classify rule. CS1 CS2 CS3 CS4 CS5 CS6 CS7 Copyright MediaTek Inc. All rights reserved. 2013/7/16 20 After classify iptables -t mangle -A qos_prerouting_rule_chain -m dscp --dscpclass CS4 -j MARK --set-mark 52 (VI) iptables -t mangle -A qos_prerouting_rule_chain -m dscp --dscpclass CS6 -j MARK --set-mark 22 (VO) iptables -t mangle -A qos_prerouting_rule_chain -m dscp --dscpclass BE -j MARK --set-mark 62 (BE) iptables -t mangle -A qos_prerouting_rule_chain -m dscp --dscpclass CS2 -j MARK --set-mark 12 (BK) Highest Priority set mark 52 High Priority set mark 22 Default Priority set mark 62 Low Priority set mark 12 QDMA do dequeue
22 HW QoS (QDMA) replace DRR QDMA replace HTB (TC function) Minimum Rate Maximum Rate Usage: HTB Example: Minimum Rate tc class add dev imq0 parent 3:0 classid 3:1 htb rate 1024kbit ceil 2048kbit QDMA Example: Minimum Rate qdma rate Copyright MediaTek Inc. All rights reserved. 2013/7/16 21 Maximum Rate Maximum Rate qdma rate [queue] [min_en] [min_rate] [max_en] [max_rate] - set rate control for queue
23 HW QoS (QDMA) replace DRR classify packet + QDMA classify packet + dequeue qdma sch_rate (total BW = 51200kbyte) qdma resv qdma sch 2 0 qdma rate (min rate=5120kbyte, max rate=5120kbyte ) qdma m2q 11 2 (set queue mapping: skb with mark 11 to queue 2.) qdma resv qdma sch 3 0 qdma rate qdma m2q 61 3 Four different minimum rate=> four different priority qdma resv qdma sch 4 0 qdma rate qdma m2q 21 4 qdma resv qdma sch 5 0 qdma rate Copyright MediaTek Inc. All rights reserved. 2013/7/16 22 qdma m2q 51 5
24 HW QoS (QDMA) replace SPQ QDMA replace SPQ (TC function) QDMA strict priority Example qdma rate qdma rate Queue 3 priority > Queue 2 priority Copyright MediaTek Inc. All rights reserved. 2013/7/16 23
25 HW QoS (QDMA) replace SPQ qdma sch_rate qdma sch 2 0 qdma rate qdma m2q 11 2 qdma sch 3 0 qdma rate qdma m2q 61 3 qdma sch 4 0 qdma rate qdma m2q 21 4 Highest: Queue 5 High: Queue 4 Default: Queue 3 Low: Queue 2 qdma sch 5 0 qdma rate qdma m2q 61 5 Copyright MediaTek Inc. All rights reserved. 2013/7/16 24
26 HW QoS (QDMA) replace Mixed mode qdma sch_rate (total BW=50M) qdma resv qdma sch 10 1 qdma rate (Queue 10=total BW*10%=5M) qdma m2q Highest: Queue 13 High: Queue 12 Default: Queue 11 Low: Queue 10 qdma resv qdma sch 11 1 qdma rate (Queue 11=total BW*20%=10M) qdma m2q qdma resv qdma sch 12 1 qdma rate (Strict Priority) qdma m2q qdma resv qdma sch 13 1 qdma rate (Strict Priority) qdma m2q Copyright MediaTek Inc. All rights reserved. 2013/7/16 25
27 Outline Overview of QoS Web UI SW QoS (TC, traffic control) DRR SPQ Mixed Fairness QoS HW QoS (QDMA, MT7621) Replace DRR Replace SPQ Replace Mixed Test Result Copyright MediaTek Inc. All rights reserved. 2013/7/15 26
28 Test Result (1) Test Condition QoS Mode:DRR Total BW = 10M DUT : MT7621 FPGA (QDMA V.S TC) Copyright MediaTek Inc. All rights reserved. 2013/7/16 27
29 TC Test Result (MT7621 FPGA) : TCP QDMA Copyright MediaTek Inc. All rights reserved. 2013/7/15 28
30 TC Test Result (MT7621 FPGA) : UDP QDMA Copyright MediaTek Inc. All rights reserved. 2013/7/15 29
31 TC Test Result (MT7621 FPGA) : RTP QDMA Copyright MediaTek Inc. All rights reserved. 2013/7/15 30
32 TC Test Result (MT7621 FPGA) : RTP QDMA Copyright MediaTek Inc. All rights reserved. 2013/7/15 31
33 QDMA V.S TC (MT7621 FPGA) QDMA can lower CPU loading. QDMA can control total BW precisely especially when CPU is busy or computing power is low. QDMA can short the response time and jitter. QDMA can make transmission rate become more smooth and stable. Copyright MediaTek Inc. All rights reserved. 2013/7/15 32
34 Test Result (2) Test Condition QoS Mode:DRR, SPQ Total BW = 50M DUT : MT7621 ASIC(QDMA HW NAT V.S QDMA no HW NAT) Copyright MediaTek Inc. All rights reserved. 2013/7/16 33
35 MT7621 ASIC (CPU800M) : DRR UL(No HWNAT)(TCP port 2000, 3000, 4000, 5000)(Priority High-> Low) UL(HWNAT)(TCP port 2000, 3000, 4000, 5000)(Priority High-> Low) Copyright MediaTek Inc. All rights reserved. 2013/7/16 34
36 MT7621 ASIC (CPU800M) : DRR DL(No HWNAT)(TCP port 2000, 3000, 4000, 5000)(Priority High-> Low) DL(HWNAT)(TCP port 2000, 3000, 4000, 5000)(Priority High-> Low) Copyright MediaTek Inc. All rights reserved. 2013/7/16 35
37 MT7621 ASIC (CPU800M) : SPQ UL(No HWNAT)(TCP port 2000, 3000, 4000, 5000)(Priority High-> Low) UL(HWNAT)(TCP port 2000, 3000, 4000, 5000)(Priority High-> Low) Copyright MediaTek Inc. All rights reserved. 2013/7/16 36
38 MT7621 ASIC (CPU800M) : SPQ DL(No HWNAT)(TCP port 2000, 3000, 4000, 5000)(Priority High-> Low) DL(HWNAT)(TCP port 2000, 3000, 4000, 5000)(Priority High-> Low) Copyright MediaTek Inc. All rights reserved. 2013/7/16 37
39 QDMA Benefit QDMA can lower CPU loading. In the past, when HW NAT enable, we can not use SW QoS. In MT7621, QDMA can do bandwidth control and schedular when HW NAT enable. Copyright MediaTek Inc. All rights reserved. 2013/7/16 38
40 Copyright MediaTek Inc. All rights reserved.
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