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2023-01-27 - 14:45

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 Jan 27, 2023 00:46:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
312821850,6sleep12350199cyclictest21:50:271
1176911620,15ptp4l0-21swapper/119:08:051
1176911560,7ptp4l0-21swapper/319:05:223
1176911530,46ptp4l0-21swapper/219:10:002
1176911520,73ptp4l0-21swapper/019:07:210
279921450,6sleep22350299cyclictest00:09:232
117691810,26ptp4l24054-21/usr/sbin/munin23:45:242
117691640,5ptp4l20982-21cstates22:30:142
2350199633,4cyclictest319992cpuspeed21:45:151
117691630,5ptp4l5030-21apt-get19:40:033
117691630,2ptp4l0-21swapper/220:39:342
117691630,2ptp4l0-21swapper/022:25:300
69752620,5sleep26978-21fschecks_count22:00:162
271182620,3sleep30-21swapper/320:25:183
117691620,1ptp4l0-21swapper/023:10:280
232382610,7sleep32350399cyclictest21:25:243
117691610,2ptp4l0-21swapper/222:21:532
117691600,2ptp4l0-21swapper/221:08:042
117691590,2ptp4l0-21swapper/300:12:013
117691590,2ptp4l0-21swapper/223:27:542
117691590,2ptp4l0-21swapper/223:20:192
117691580,5ptp4l14107-21/usr/sbin/munin21:05:250
117691580,2ptp4l0-21swapper/223:16:442
117691580,2ptp4l0-21swapper/221:04:302
117691580,2ptp4l0-21swapper/022:06:100
92352570,4sleep341-21ksoftirqd/300:20:333
117691570,2ptp4l0-21swapper/220:51:222
117691560,9ptp4l0-21swapper/021:45:190
117691560,2ptp4l0-21swapper/220:17:252
117691560,2ptp4l0-21swapper/219:51:012
117691560,1ptp4l0-21swapper/319:29:493
117691560,13ptp4l0-21swapper/223:06:262
117691550,2ptp4l0-21swapper/322:22:313
117691550,2ptp4l0-21swapper/222:41:002
117691550,2ptp4l0-21swapper/221:30:252
117691550,2ptp4l0-21swapper/219:41:132
117691550,2ptp4l0-21swapper/021:31:500
117691550,2ptp4l0-21swapper/020:22:080
117691550,12ptp4l0-21swapper/320:00:323
117691540,2ptp4l0-21swapper/323:57:093
117691540,2ptp4l0-21swapper/323:15:373
117691540,2ptp4l0-21swapper/321:00:193
117691540,2ptp4l0-21swapper/222:29:022
117691540,2ptp4l0-21swapper/121:15:401
117691540,2ptp4l0-21swapper/023:20:150
117691540,2ptp4l0-21swapper/022:15:180
117691540,2ptp4l0-21swapper/022:00:200
117691540,2ptp4l0-21swapper/021:23:530
117691540,2ptp4l0-21swapper/021:23:530
117691540,2ptp4l0-21swapper/000:25:090
117691540,1ptp4l0-21swapper/023:35:430
117691540,1ptp4l0-21swapper/022:13:360
117691540,15ptp4l16558-21grep00:35:360
117691540,13ptp4l0-21swapper/320:45:273
117691540,11ptp4l0-21swapper/320:50:173
117691540,10ptp4l0-21swapper/222:10:052
117691540,10ptp4l0-21swapper/221:21:522
117691540,10ptp4l0-21swapper/221:21:522
117691530,2ptp4l0-21swapper/219:27:342
117691530,2ptp4l0-21swapper/020:50:180
117691530,2ptp4l0-21swapper/000:20:190
117691530,1ptp4l0-21swapper/319:16:173
117691530,1ptp4l0-21swapper/019:32:020
117691520,2ptp4l0-21swapper/322:55:523
117691520,2ptp4l0-21swapper/320:44:163
117691520,2ptp4l0-21swapper/319:10:573
117691520,2ptp4l0-21swapper/122:10:201
117691520,2ptp4l0-21swapper/020:47:480
117691520,2ptp4l0-21swapper/020:33:480
117691520,2ptp4l0-21swapper/020:15:580
117691520,1ptp4l0-21swapper/320:20:523
117691520,10ptp4l0-21swapper/221:45:582
117691510,2ptp4l0-21swapper/322:01:423
117691510,2ptp4l0-21swapper/321:31:243
117691510,2ptp4l0-21swapper/321:06:523
117691510,2ptp4l0-21swapper/319:50:313
117691510,2ptp4l0-21swapper/121:23:571
117691510,2ptp4l0-21swapper/121:23:571
117691510,1ptp4l0-21swapper/020:57:220
117691500,2ptp4l0-21swapper/322:27:343
117691500,2ptp4l0-21swapper/322:12:163
117691500,2ptp4l0-21swapper/320:31:243
117691500,2ptp4l0-21swapper/320:05:103
117691500,2ptp4l0-21swapper/221:57:232
117691500,2ptp4l0-21swapper/221:11:042
117691500,2ptp4l0-21swapper/220:28:002
117691500,2ptp4l0-21swapper/200:28:202
117691500,2ptp4l0-21swapper/120:35:081
117691500,2ptp4l0-21swapper/020:10:280
117691500,2ptp4l0-21swapper/020:10:270
117691500,1ptp4l0-21swapper/023:03:280
117691500,1ptp4l0-21swapper/021:15:270
117691500,11ptp4l0-21swapper/221:15:282
117691490,2ptp4l0-21swapper/323:20:093
117691490,2ptp4l0-21swapper/322:05:513
117691490,2ptp4l0-21swapper/321:21:353
117691490,2ptp4l0-21swapper/321:21:353
117691490,2ptp4l0-21swapper/319:45:553
117691490,2ptp4l0-21swapper/223:32:222
117691490,2ptp4l0-21swapper/221:42:332
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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