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2023-01-28 - 08:25

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 highest latencies:
System rackdslot1.osadl.org (updated Sat Jan 28, 2023 00:46:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1176911700,17ptp4l0-21swapper/019:06:590
1176911630,12ptp4l0-21swapper/119:08:201
1176911490,15ptp4l0-21swapper/219:06:532
2464321450,8sleep31869199cyclictest20:30:233
1176911140,21ptp4l18171-21runrttasks19:06:583
117691730,2ptp4l0-21swapper/222:11:252
117691660,2ptp4l0-21swapper/223:10:332
117691640,9ptp4l1868999cyclictest22:55:141
117691640,7ptp4l0-21swapper/220:28:312
117691640,4ptp4l5702-21df21:00:203
117691620,2ptp4l0-21swapper/319:30:143
117691610,8ptp4l0-21swapper/120:32:071
117691610,2ptp4l0-21swapper/319:40:283
117691610,2ptp4l0-21swapper/219:23:032
117691600,2ptp4l0-21swapper/322:15:203
117691600,15ptp4l0-21swapper/122:30:321
117691600,15ptp4l0-21swapper/122:30:321
117691590,2ptp4l0-21swapper/323:25:353
117691590,2ptp4l0-21swapper/322:13:503
117691590,2ptp4l0-21swapper/320:05:213
117691590,2ptp4l0-21swapper/000:08:570
5922580,2sleep10-21swapper/100:15:191
117691580,2ptp4l0-21swapper/322:05:273
117691580,2ptp4l0-21swapper/223:44:472
117691580,2ptp4l0-21swapper/222:09:592
117691580,2ptp4l0-21swapper/200:04:132
117691580,2ptp4l0-21swapper/122:00:331
117691580,2ptp4l0-21swapper/023:05:340
117691580,2ptp4l0-21swapper/021:20:210
117791570,11getstats0-21swapper/222:15:142
117691570,2ptp4l0-21swapper/322:47:503
117691570,2ptp4l0-21swapper/320:04:033
117691570,2ptp4l0-21swapper/221:51:452
117622570,5sleep125-21ksoftirqd/121:10:321
117622570,5sleep125-21ksoftirqd/121:10:321
117691560,7ptp4l0-21swapper/220:17:502
117691560,2ptp4l0-21swapper/323:15:233
117691560,2ptp4l0-21swapper/320:24:193
117691560,2ptp4l0-21swapper/219:16:122
117691560,2ptp4l0-21swapper/200:37:302
117691560,2ptp4l0-21swapper/200:16:152
117691560,2ptp4l0-21swapper/120:35:201
117691560,2ptp4l0-21swapper/021:41:550
117691560,2ptp4l0-21swapper/020:10:590
117691560,1ptp4l0-21swapper/000:20:330
85452550,4sleep018687-21cyclictest23:25:000
117691550,7ptp4l0-21swapper/219:11:532
117691550,2ptp4l0-21swapper/323:45:163
117691550,2ptp4l0-21swapper/323:45:163
117691550,2ptp4l0-21swapper/320:25:183
117691550,2ptp4l0-21swapper/223:54:062
117691540,2ptp4l0-21swapper/200:25:222
117791530,11getstats0-21swapper/222:00:002
117691530,2ptp4l0-21swapper/321:15:593
117691530,2ptp4l0-21swapper/320:15:313
117691530,2ptp4l0-21swapper/319:27:503
117691530,2ptp4l0-21swapper/223:37:182
117691530,2ptp4l0-21swapper/223:25:292
117691530,2ptp4l0-21swapper/221:26:072
117691530,2ptp4l0-21swapper/221:13:462
117691530,2ptp4l0-21swapper/221:13:462
117691530,2ptp4l0-21swapper/220:03:082
117691530,2ptp4l0-21swapper/200:10:182
117691530,2ptp4l0-21swapper/123:13:101
117691530,2ptp4l0-21swapper/021:59:400
117691530,2ptp4l0-21swapper/000:25:310
117691530,1ptp4l0-21swapper/220:54:242
117691530,1ptp4l0-21swapper/022:26:560
117691520,2ptp4l0-21swapper/222:59:072
117691520,2ptp4l0-21swapper/222:54:562
117691520,2ptp4l0-21swapper/222:34:252
117691520,2ptp4l0-21swapper/222:34:242
117691520,2ptp4l0-21swapper/222:02:112
117691520,2ptp4l0-21swapper/221:19:122
117691520,2ptp4l0-21swapper/219:36:462
117691520,2ptp4l0-21swapper/219:25:492
117691520,2ptp4l0-21swapper/200:31:302
117691520,2ptp4l0-21swapper/200:08:372
117691520,2ptp4l0-21swapper/123:20:161
117691520,2ptp4l0-21swapper/121:40:451
117691520,1ptp4l0-21swapper/022:06:370
117691510,2ptp4l0-21swapper/322:54:193
117691510,2ptp4l0-21swapper/223:08:592
117691510,2ptp4l0-21swapper/222:40:382
117691510,2ptp4l0-21swapper/222:22:062
117691510,2ptp4l0-21swapper/221:43:542
117691510,2ptp4l0-21swapper/221:34:552
117691510,2ptp4l0-21swapper/123:44:421
117691510,2ptp4l0-21swapper/023:35:130
117691510,2ptp4l0-21swapper/023:13:500
117691510,2ptp4l0-21swapper/022:18:240
117691510,2ptp4l0-21swapper/021:46:390
117691510,16ptp4l0-21swapper/023:31:100
117691510,12ptp4l0-21swapper/122:18:321
117691510,11ptp4l0-21swapper/023:26:170
18042500,1sleep30-21swapper/323:10:143
117791500,10getstats0-21swapper/222:45:142
117691500,2ptp4l0-21swapper/223:59:502
117691500,2ptp4l0-21swapper/223:00:572
117691500,2ptp4l0-21swapper/221:01:312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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