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linux-loongson/tools/testing/selftests/tc-testing/tc-tests/qdiscs/fq.json
Cong Wang 16ce349b15 selftests/tc-testing: Add qdisc limit trimming tests 
Added new test cases for FQ, FQ_CODEL, FQ_PIE, and HHF qdiscs to verify queue
trimming behavior when the qdisc limit is dynamically reduced.

Each test injects packets, reduces the qdisc limit, and checks that the new
limit is enforced. This is still best effort since timing qdisc backlog
is not easy.

Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2025-05-09 12:34:38 +01:00

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[
{
"id": "983b",
"name": "Create FQ with default setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
],
"cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root fq",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "38a1",
"name": "Create FQ with limit packet setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
],
"cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root fq limit 3000",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 3000p",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "0a18",
"name": "Create FQ with flow_limit setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
],
"cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root fq flow_limit 300",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 10000p flow_limit 300p",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "2390",
"name": "Create FQ with quantum setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
],
"cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root fq quantum 9000",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 10000p flow_limit 100p.*quantum 9000b",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "845b",
"name": "Create FQ with initial_quantum setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
],
"cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root fq initial_quantum 900000",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 10000p flow_limit 100p buckets.*initial_quantum 900000b",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "10f7",
"name": "Create FQ with invalid initial_quantum setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
],
"cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root fq initial_quantum 0x80000000",
"expExitCode": "2",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root.*initial_quantum 2048Mb",
"matchCount": "0",
"teardown": [
]
},
{
"id": "9398",
"name": "Create FQ with maxrate setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
],
"cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root fq maxrate 100000",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 10000p flow_limit 100p buckets.*maxrate 100Kbit",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "342c",
"name": "Create FQ with nopacing setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
],
"cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root fq nopacing",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 10000p flow_limit 100p.*nopacing",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "6391",
"name": "Create FQ with refill_delay setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
],
"cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root fq refill_delay 100ms",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 10000p flow_limit 100p.*refill_delay 100ms",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "238b",
"name": "Create FQ with low_rate_threshold setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
],
"cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root fq low_rate_threshold 10000",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 10000p flow_limit 100p.*low_rate_threshold 10Kbit",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "7582",
"name": "Create FQ with orphan_mask setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
],
"cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root fq orphan_mask 255",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 10000p flow_limit 100p.*orphan_mask 255",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "4894",
"name": "Create FQ with timer_slack setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
],
"cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root fq timer_slack 100",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 10000p flow_limit 100p.*timer_slack 100ns",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "324c",
"name": "Create FQ with ce_threshold setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
],
"cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root fq ce_threshold 100",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 10000p flow_limit 100p",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "424a",
"name": "Create FQ with horizon time setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
],
"cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root fq horizon 100",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 10000p flow_limit 100p.*horizon 100us",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "89e1",
"name": "Create FQ with horizon_cap setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
],
"cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root fq horizon_cap",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 10000p flow_limit 100p.*horizon_cap",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "32e1",
"name": "Delete FQ with valid handle",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
"$TC qdisc add dev $DUMMY handle 1: root fq"
],
"cmdUnderTest": "$TC qdisc del dev $DUMMY handle 1: root",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 10000p",
"matchCount": "0",
"teardown": [
]
},
{
"id": "49b0",
"name": "Replace FQ with limit setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
"$TC qdisc add dev $DUMMY handle 1: root fq"
],
"cmdUnderTest": "$TC qdisc replace dev $DUMMY handle 1: root fq limit 5000",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 5000p",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "9478",
"name": "Change FQ with limit setting",
"category": [
"qdisc",
"fq"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
"$TC qdisc add dev $DUMMY handle 1: root fq"
],
"cmdUnderTest": "$TC qdisc change dev $DUMMY handle 1: root fq limit 100",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DUMMY",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 100p",
"matchCount": "1",
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
},
{
"id": "9479",
"name": "FQ test qdisc limit trimming",
"category": ["qdisc", "fq"],
"plugins": {"requires": ["nsPlugin", "scapyPlugin"]},
"setup": [
"$TC qdisc add dev $DEV1 handle 1: root fq limit 10"
],
"scapy": [
{
"iface": "$DEV0",
"count": 10,
"packet": "Ether(type=0x800)/IP(src='10.0.0.10',dst='10.0.0.20')/TCP(sport=5000,dport=10)"
}
],
"cmdUnderTest": "$TC qdisc change dev $DEV1 handle 1: root fq limit 1",
"expExitCode": "0",
"verifyCmd": "$TC qdisc show dev $DEV1",
"matchPattern": "qdisc fq 1: root refcnt [0-9]+ limit 1p",
"matchCount": "1",
"teardown": ["$TC qdisc del dev $DEV1 handle 1: root"]
}
]
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