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Commit 166a884d authored by Joanne Hugé's avatar Joanne Hugé
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Add 15h A20-shuttle measure and packet reception latency measures

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measure-analysis/additional-measures.md 0 → 100644
View file @ 166a884d
## Packet reception latency
Shuttle to A20, no XDP
With tracing and timestamps (some overhead):
| Latency measured | min | avg | max |
| -------------------------------------- | ------ | ------ | ------ |
| IRQ -> RX SO_TIMESTAMP | 27us | 31us | 136us |
| RX SO_TIMESTAMP -> Userspace timestamp | 85us | 93us | 247us |
| IRQ -> Userspace timestamp | 112us | 124us | 383us |
With timestamps (little overhead):
| Latency measured | min | avg | max |
| -------------------------------------- | ------ | ------ | ------ |
| Shuttle timestamp -> A20 timestamp | 88us | 88us | 300us |
| RX SO_TIMESTAMP (A20) | 67us | 172us | 173us |
| TX SO_TIMESTAMP -> (Shuttle) | 2us | 18us | 20us |
measure-analysis/measure-analysis.py
View file @ 166a884d
......@@ -395,6 +395,11 @@ class MeasureSetHandler:
report.write("\n")
report.write("\n")
with open("additional-measures.md") as additional_measures:
report.write("## Additional measures\n\n")
report.write("".join([l for l in additional_measures]))
def update_report_info(self):
for mtype in self.measure_sets:
......
measure-analysis/measure-report.md
View file @ 166a884d
......@@ -38,19 +38,6 @@ A20, 5.6, 18h13 (328153384) | 8.0000us | 73.0000us | 9
![alt text](measures/graphs/cyclictest_wake-up_latencyWake-up latency.png "cyclictest_wake-up_latency Graph")
### shuttle_signal_jitter results
Two shuttles connected end to end with an ethernet cable and synchronized with PTP emit signals, and a logic analyzer measures variation in those signals, similar to "Shuttle controlled A20 signal output jitter" measures
**Common test metadata:** Device: Shuttle, Linux kernel version: 4.19, Task priority: 98, Interval: 10000us, Boot Parameters: isolcpus,rcu_nocbs,irqaffinity, ETF qdisc delta: None, Device and processor load: None, Test duration: 0h10, Speed (Mb/s): 1000, ETF offset: 500us, Packet route: E2E, qdisc: pfifo_fast, Client device: A20, XDP: no, Callback delay: none
Minimum | Maximum | Average | Standard deviation | Lost packets
-------------------------------- | -------------------------------- | -------------------------------- | -------------------------------- | ------------
**Shuttle signal output jitter** | **Shuttle signal output jitter** | **Shuttle signal output jitter** | **Shuttle signal output jitter** |
0.0000us | 374.0000us | 141.6740us | 97.6712us | 0
![alt text](measures/graphs/shuttle_signal_jitterShuttle signal output jitter.png "shuttle_signal_jitter Graph")
### packet_jitter results
An UDP packet is periodically sent from one board to another using a real time thread. The receiving board calculates the intervals between the packets it receives, and sees how much it differs from the scheduled interval.
......@@ -94,11 +81,33 @@ Metadata | Minimum | Max
---------------------------------------- | ------------------------------- | ------------------------------- | ------------------------------- | ------------------------------- | ------------
**i, duration, delay** | **edge jitter - period jitter** | **edge jitter - period jitter** | **edge jitter - period jitter** | **edge jitter - period jitter** |
1000us, 9h59, 600us (35999280, 71998560) | 0.0000us - 958.0000us | 129.0000us - 1063.0000us | 7.5260us - 999.5439us | 9.5594us - 1.7508us | 0
10000us, 0h59, 5000us (359994, 719988) | 0.0000us - 9947.0000us | 75.0000us - 10057.0000us | 3.1981us - 9999.6329us | 5.7902us - 4.0873us | 0
400us, 0h59, 360us (8999831, 17999662) | 0.0000us - 333.0000us | 85.0000us - 471.0000us | 11.6154us - 399.5358us | 10.5358us - 1.1869us | 0
500us, 13h59, 400us (100798095, 201596190) | 0.0000us - 360.0000us | 265.0000us - 582.0000us | 10.5889us - 499.5328us | 9.7824us - 1.3678us | 0
![alt text](measures/graphs/shuttle_a20_signal_jitteredge jitter.png "shuttle_a20_signal_jitter Graph")
![alt text](measures/graphs/shuttle_a20_signal_jitterperiod jitter.png "shuttle_a20_signal_jitter Graph")
## Additional measures
## Packet reception latency
Shuttle to A20, no XDP
With tracing and timestamps (some overhead):
| Latency measured | min | avg | max |
| -------------------------------------- | ------ | ------ | ------ |
| IRQ -> RX SO_TIMESTAMP | 27us | 31us | 136us |
| RX SO_TIMESTAMP -> Userspace timestamp | 85us | 93us | 247us |
| IRQ -> Userspace timestamp | 112us | 124us | 383us |
With timestamps (little overhead):
| Latency measured | min | avg | max |
| -------------------------------------- | ------ | ------ | ------ |
| Shuttle timestamp -> A20 timestamp | 88us | 88us | 300us |
| RX SO_TIMESTAMP (A20) | 67us | 172us | 173us |
| TX SO_TIMESTAMP -> (Shuttle) | 2us | 18us | 20us |
measure-analysis/measures/measure_sets.json
View file @ 166a884d
{"cyclictest_wake-up_latency": {"ids": [3, 5], "next_id": 6}, "shuttle_signal_jitter": {"ids": [0], "next_id": 1}, "packet_jitter": {"ids": [0, 1, 2, 3, 4, 5, 6], "next_id": 7}, "ping_interval": {"ids": [0], "next_id": 1}, "shuttle_a20_signal_jitter": {"ids": [4, 5, 6], "next_id": 7}}
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{"cyclictest_wake-up_latency": {"ids": [3, 5], "next_id": 6}, "packet_jitter": {"ids": [0, 1, 2, 3, 4, 5, 6], "next_id": 7}, "ping_interval": {"ids": [0], "next_id": 1}, "shuttle_a20_signal_jitter": {"ids": [4, 7], "next_id": 8}}
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measure-analysis/measures/shuttle_a20_signal_jitter6.json → measure-analysis/measures/shuttle_a20_signal_jitter7.json
View file @ 166a884d
{"measure_sets": [{"measure_type": "shuttle_a20_signal_jitter", "props_names": ["edge jitter", "period jitter"], "units": ["us", "us"], "middle": 0, "props": [[600567, 638826, 637287, 585520, 546551, 458504, 401419, 363606, 337218, 291855, 271012, 251851, 233883, 204018, 189404, 185663, 191452, 190129, 186978, 186355, 190121, 184212, 166840, 153938, 151357, 147059, 135477, 128218, 118057, 103336, 84692, 69572, 56512, 46223, 34166, 27185, 22443, 18225, 16807, 18588, 18684, 18517, 17367, 14713, 13212, 12025, 9601, 8947, 8432, 8233, 7248, 6976, 6042, 5366, 5129, 5194, 4397, 2016, 631, 389, 264, 226, 174, 167, 122, 105, 106, 67, 60, 50, 41, 33, 43, 34, 20, 16, 12, 11, 9, 8, 6, 1, 3, 4, 2, 2], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 6, 12, 31, 64, 94, 169, 204, 292, 354, 422, 513, 737, 1055, 1521, 1938, 2522, 3184, 4136, 5660, 9131, 14794, 18071, 32569, 167081, 1571292, 7045174, 7026857, 1751575, 202798, 50106, 24139, 17779, 10391, 6647, 4324, 3316, 2753, 2751, 2573, 2610, 2321, 1930, 1430, 1118, 756, 611, 502, 409, 318, 230, 151, 100, 54, 42, 18, 5, 4, 3, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1]], "props_type": "histogram", "metadata": {"dev": "A20", "ker": "5.6", "prio": "98", "i": "400us", "boot_p": "isolcpus,rcu_nocbs,irqaffinity", "delta": "None", "load": "None", "duration": "0h59", "speed": "1000", "etf_offset": "500us", "route": "E2E", "qdisc": "pfifo_fast", "client": "A20", "XDP": "no", "delay": "360us", "lost_packets": "0"}}]}
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{"measure_sets": [{"measure_type": "shuttle_a20_signal_jitter", "props_names": ["edge jitter", "period jitter"], "units": ["us", "us"], "middle": 0, "props": [[8257327, 8344463, 7783391, 7096625, 6390296, 5606943, 4787888, 4015736, 3445982, 2970116, 2632229, 2409304, 2227238, 2100931, 2004104, 1931109, 1894616, 1844486, 1819007, 1823767, 1835950, 1861141, 1864219, 1821236, 1766006, 1680005, 1576069, 1474049, 1341584, 1204611, 1031396, 839412, 669063, 521573, 413333, 337240, 262190, 202881, 159270, 120056, 90984, 72949, 57979, 44693, 34459, 29228, 22015, 14955, 11022, 8229, 6937, 5842, 4890, 4178, 3542, 2912, 2459, 2065, 1713, 1567, 1245, 1046, 868, 721, 542, 470, 367, 363, 295, 310, 273, 250, 237, 214, 177, 176, 149, 146, 101, 102, 87, 75, 65, 68, 49, 46, 38, 24, 13, 9, 9, 9, 5, 3, 1, 1, 2, 1, 0, 2, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 3, 2, 2, 1, 3, 1, 1, 2, 3, 2, 0, 1, 1, 1, 1, 4, 2, 1, 1, 0, 0, 2, 1, 1, 2, 0, 0, 2, 0, 2, 2, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 2, 0, 1, 1, 1, 2, 0, 0, 1, 1, 2, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1], [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 2, 2, 1, 0, 0, 0, 2, 1, 0, 0, 0, 2, 1, 3, 1, 2, 3, 13, 11, 11, 24, 33, 74, 185, 479, 1070, 2199, 4466, 8154, 13666, 21172, 30250, 39533, 50179, 60433, 72876, 88899, 116008, 164434, 252430, 565979, 3236242, 22631054, 74263646, 70869460, 21897374, 4903234, 1105684, 340153, 182846, 120568, 94506, 77580, 59425, 42956, 33425, 30451, 30304, 30854, 29994, 28051, 24388, 20575, 16479, 12702, 8922, 5744, 3269, 1865, 951, 454, 220, 89, 31, 20, 12, 6, 8, 10, 8, 3, 4, 0, 2, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0, 1, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1]], "props_type": "histogram", "metadata": {"dev": "A20", "ker": "5.6", "prio": "98", "i": "500us", "boot_p": "isolcpus,rcu_nocbs,irqaffinity", "delta": "None", "load": "None", "duration": "13h59", "speed": "1000", "etf_offset": "500us", "route": "E2E", "qdisc": "pfifo_fast", "client": "A20", "XDP": "no", "delay": "400us", "lost_packets": "0"}}]}
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measure-analysis/measures/shuttle_signal_jitter0.json deleted 100644 → 0
View file @ 0d5bcea9
{"measure_sets": [{"measure_type": "shuttle_signal_jitter", "props_names": ["Shuttle signal output jitter"], "units": ["us"], "middle": 0, "props": [[296, 321, 309, 295, 311, 304, 285, 291, 301, 284, 307, 300, 283, 294, 299, 275, 269, 293, 297, 282, 276, 325, 281, 298, 296, 273, 292, 268, 297, 256, 271, 310, 287, 285, 302, 277, 272, 283, 270, 260, 271, 276, 270, 280, 279, 269, 275, 275, 278, 282, 277, 246, 273, 279, 257, 251, 252, 261, 275, 279, 261, 244, 252, 256, 260, 271, 254, 258, 245, 247, 255, 235, 222, 235, 270, 227, 229, 228, 231, 224, 225, 225, 207, 225, 210, 211, 196, 214, 206, 195, 186, 219, 199, 194, 202, 192, 177, 201, 171, 175, 181, 173, 180, 177, 169, 169, 160, 172, 177, 149, 172, 162, 153, 153, 146, 153, 162, 158, 148, 143, 151, 143, 120, 124, 141, 131, 129, 131, 120, 131, 132, 132, 99, 134, 135, 104, 110, 119, 107, 112, 130, 107, 96, 106, 114, 101, 111, 112, 100, 107, 110, 101, 95, 110, 102, 105, 106, 102, 105, 118, 120, 93, 108, 100, 110, 114, 111, 114, 119, 106, 106, 103, 125, 129, 115, 130, 137, 126, 117, 139, 136, 118, 147, 135, 128, 149, 150, 149, 151, 151, 151, 144, 162, 156, 153, 153, 159, 155, 144, 162, 180, 154, 191, 167, 177, 179, 172, 171, 180, 189, 160, 177, 183, 196, 183, 193, 190, 198, 198, 197, 195, 178, 189, 208, 190, 208, 211, 206, 198, 180, 192, 199, 211, 212, 197, 223, 221, 210, 203, 205, 224, 207, 200, 215, 216, 222, 224, 228, 217, 225, 205, 215, 206, 219, 209, 203, 210, 193, 201, 218, 202, 181, 199, 191, 196, 198, 174, 181, 170, 190, 186, 175, 162, 167, 171, 153, 163, 154, 157, 145, 154, 148, 145, 142, 142, 159, 138, 131, 141, 133, 126, 122, 133, 118, 122, 123, 111, 112, 123, 97, 94, 101, 111, 106, 97, 108, 95, 88, 93, 92, 74, 85, 91, 68, 93, 79, 71, 68, 70, 64, 61, 64, 61, 56, 54, 56, 53, 45, 54, 42, 40, 45, 41, 29, 42, 27, 31, 18, 23, 20, 24, 26, 22, 19, 13, 16, 9, 18, 8, 10, 17, 10, 8, 4, 7, 4, 1, 2, 4, 1, 6, 4, 2, 1, 0, 1, 0, 0, 2, 0, 0, 1, 0, 0, 1]], "props_type": "histogram", "metadata": {"dev": "Shuttle", "ker": "4.19", "prio": "98", "i": "10000us", "boot_p": "isolcpus,rcu_nocbs,irqaffinity", "delta": "None", "load": "None", "duration": "0h10", "speed": "1000", "etf_offset": "500us", "route": "E2E", "qdisc": "pfifo_fast", "client": "A20", "XDP": "no", "delay": "none", "lost_packets": "0"}}]}
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