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2023-03-31 - 10:54

x86 Intel Atom E3845 @1910 MHz, Linux 4.19.37-rt19 (Profile)

Latency plot of system in rack #d, slot #1
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Up99 -i200 -h400 --smi -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 100, Linux 4.9.20-rt16, x86_64 highest latencies:
System rackdslot1.osadl.org (updated Fri Mar 31, 2023 00:46:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
402823630,9sleep24030-21irqrtprio19:05:232
2975121690,8sleep0553699cyclictest20:05:010
1176911610,14ptp4l0-21swapper/319:07:143
1176911520,8ptp4l0-21swapper/019:06:280
1176911410,15ptp4l0-21swapper/119:08:261
117691750,2ptp4l0-21swapper/123:10:151
5537997259,7cyclictest25-21ksoftirqd/123:40:161
117691720,2ptp4l0-21swapper/121:36:571
5537997156,8cyclictest25-21ksoftirqd/120:55:121
5537997056,7cyclictest25-21ksoftirqd/121:20:141
112102700,7sleep2553899cyclictest00:10:292
117691670,8ptp4l0-21swapper/200:36:412
117691660,4ptp4l11854-21chrt00:12:140
5537996551,7cyclictest25-21ksoftirqd/123:50:141
154022650,5sleep115406-21fschecks_time00:20:271
145672650,5sleep014572-21irqrtprio20:40:210
117691650,1ptp4l0-21swapper/223:04:472
5537996452,6cyclictest25-21ksoftirqd/122:55:121
230602620,1sleep00-21swapper/000:35:400
117691620,4ptp4l21738-21memory20:55:230
117691620,3ptp4l33-21ksoftirqd/222:13:352
117691620,2ptp4l0-21swapper/222:00:382
220502610,2sleep20-21swapper/219:45:162
154272610,4sleep05535-21cyclictest21:55:210
117691610,2ptp4l0-21swapper/221:33:492
117691610,2ptp4l0-21swapper/221:33:492
117691610,2ptp4l0-21swapper/220:10:202
117691610,2ptp4l0-21swapper/220:10:202
117691610,2ptp4l0-21swapper/219:39:442
117691610,2ptp4l0-21swapper/019:15:210
5539995945,6cyclictest41-21ksoftirqd/319:20:253
5537995946,7cyclictest25-21ksoftirqd/100:15:191
117691590,2ptp4l0-21swapper/221:47:552
117691590,2ptp4l0-21swapper/221:35:532
117691580,2ptp4l0-21swapper/320:04:173
117691580,2ptp4l0-21swapper/320:04:163
117691580,2ptp4l0-21swapper/221:25:302
117691580,2ptp4l0-21swapper/200:06:312
5539995743,6cyclictest41-21ksoftirqd/300:25:123
5537995744,7cyclictest25-21ksoftirqd/120:05:131
147022570,3sleep30-21swapper/300:20:003
117791570,12getstats0-21swapper/021:45:140
117691570,2ptp4l0-21swapper/322:35:363
117691570,1ptp4l0-21swapper/119:10:191
5537995644,7cyclictest25-21ksoftirqd/121:00:251
117691560,2ptp4l0-21swapper/221:54:302
117691560,2ptp4l0-21swapper/221:03:012
117691560,2ptp4l0-21swapper/220:45:002
117691560,2ptp4l0-21swapper/220:22:072
117691560,2ptp4l0-21swapper/220:03:112
117691560,2ptp4l0-21swapper/220:03:102
117691560,2ptp4l0-21swapper/200:34:372
117691560,2ptp4l0-21swapper/019:52:450
117691560,1ptp4l0-21swapper/223:14:232
117691560,1ptp4l0-21swapper/019:58:240
5537995543,6cyclictest25-21ksoftirqd/100:05:181
117691550,2ptp4l0-21swapper/323:39:143
117691550,2ptp4l0-21swapper/220:29:432
117691550,2ptp4l0-21swapper/120:23:331
117691550,2ptp4l0-21swapper/021:15:210
117691550,2ptp4l0-21swapper/020:52:450
117691550,1ptp4l0-21swapper/000:01:010
117691550,1ptp4l0-21swapper/000:01:000
117691550,14ptp4l0-21swapper/323:05:273
5537995442,6cyclictest25-21ksoftirqd/123:20:131
268512540,2sleep30-21swapper/321:05:303
117691540,9ptp4l0-21swapper/323:00:033
117691540,8ptp4l0-21swapper/022:57:060
117691540,2ptp4l0-21swapper/222:06:472
117691540,2ptp4l0-21swapper/220:57:542
117691540,2ptp4l0-21swapper/219:50:422
117691540,2ptp4l0-21swapper/022:00:290
117691540,1ptp4l0-21swapper/222:50:172
117691540,1ptp4l0-21swapper/222:50:162
117691530,2ptp4l0-21swapper/322:25:363
117691530,2ptp4l0-21swapper/223:40:192
117691530,2ptp4l0-21swapper/021:35:180
117691530,1ptp4l0-21swapper/221:09:252
117791520,14getstats23531-21users22:10:380
117691520,3ptp4l1142-21runrttasks00:31:380
117691520,2ptp4l0-21swapper/322:22:233
117691520,2ptp4l0-21swapper/219:56:002
117691520,2ptp4l0-21swapper/200:27:462
117691520,2ptp4l0-21swapper/122:12:161
117691520,1ptp4l0-21swapper/223:20:402
117691520,10ptp4l0-21swapper/320:55:193
117791510,13getstats28671-21diskstats23:40:210
117691510,2ptp4l0-21swapper/323:11:353
117691510,2ptp4l0-21swapper/221:16:342
117691510,2ptp4l0-21swapper/221:10:442
117691510,2ptp4l0-21swapper/022:15:300
117691510,2ptp4l0-21swapper/021:08:100
117691510,1ptp4l0-21swapper/323:20:193
117691510,1ptp4l0-21swapper/223:45:302
117691510,1ptp4l0-21swapper/221:58:112
117691510,1ptp4l0-21swapper/219:30:272
117691510,12ptp4l0-21swapper/222:25:432
117691500,9ptp4l0-21swapper/100:38:021
117691500,2ptp4l0-21swapper/322:42:163
117691500,2ptp4l0-21swapper/119:31:541
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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