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2022-10-07 - 18:10

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

Latency plot of system in rack #d, slot #3
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 50 highest latencies:
System rackdslot3.osadl.org (updated Fri Oct 07, 2022 12:46:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
576981550,10rtkit-daemon575-21rtkit-daemon07:07:092
1896021540,6sleep13151799cyclictest11:15:301
1896021540,6sleep13151799cyclictest11:15:301
8255911140,45ptp4l401ktimersoftd/307:07:483
309052731,59sleep00-21swapper/007:05:520
31518996958,7cyclictest33-21ksoftirqd/210:20:152
3151699670,28cyclictest13357-21threads09:55:280
3151799637,13cyclictest19905-21date12:25:301
166242630,4sleep2321ktimersoftd/212:20:192
3151799627,10cyclictest5321-21chrt10:49:061
3151799626,12cyclictest0-21swapper/109:18:001
825591600,1ptp4l391rcuc/311:06:093
3151799606,11cyclictest29696-21chrt08:15:021
825591580,1ptp4l391rcuc/309:41:253
3151799576,12cyclictest2789-21seq10:41:261
3151799576,11cyclictest8432-21seq12:04:441
3151799575,12cyclictest4360-21seq09:36:151
825591560,1ptp4l391rcuc/310:58:413
57698560,2rtkit-daemon575-21rtkit-daemon09:31:122
825591550,1ptp4l391rcuc/309:48:033
825591550,1ptp4l391rcuc/309:48:023
64752550,2sleep00-21swapper/007:25:170
3151799556,11cyclictest7559-21taskset10:53:071
3151799555,12cyclictest22670-21runrttasks08:00:011
31516995534,18cyclictest9-21ksoftirqd/008:45:140
120982550,2sleep10-21swapper/107:35:251
3151799532,20cyclictest7282-21hddtemp_smartct08:35:191
3151799532,18cyclictest21654-21memory09:05:231
31518995245,4cyclictest33-21ksoftirqd/209:39:592
31518995145,4cyclictest33-21ksoftirqd/211:20:012
31518995145,4cyclictest33-21ksoftirqd/211:20:002
31518995144,4cyclictest33-21ksoftirqd/212:20:002
3151799506,11cyclictest28095-21taskset10:28:351
3151999490,2cyclictest0-21swapper/311:55:223
31518994943,4cyclictest33-21ksoftirqd/209:50:012
31518994943,4cyclictest33-21ksoftirqd/209:50:002
3151799494,14cyclictest17162-21sed12:20:251
31518994843,3cyclictest33-21ksoftirqd/208:40:002
31518994843,3cyclictest33-21ksoftirqd/207:20:012
31518994742,3cyclictest33-21ksoftirqd/212:40:002
31518994742,3cyclictest33-21ksoftirqd/210:00:002
31518994741,3cyclictest33-21ksoftirqd/208:00:002
3151799474,12cyclictest23236-21runrttasks10:16:471
31516994726,18cyclictest9-21ksoftirqd/011:05:140
3090624715,19sleep10-21swapper/107:05:541
54482460,3sleep00-21swapper/007:20:310
31518994640,4cyclictest33-21ksoftirqd/210:39:592
31518994639,4cyclictest33-21ksoftirqd/207:45:002
3151799466,18cyclictest15177-21chrt07:44:041
31518994540,3cyclictest33-21ksoftirqd/210:10:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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