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2023-02-07 - 20:07

x86 Intel Atom D2700 @2130 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of system in rack #1, slot #6
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 -Sp99 -i200 -h400 -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100, Linux 4.9.20-rt16, x86_64 highest latencies:
System rack1slot6.osadl.org (updated Tue Feb 07, 2023 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3611290,0irq_work/3381rcuc/309:52:423
3611290,0irq_work/3381rcuc/309:52:423
3611270,0irq_work/3381rcuc/312:12:563
3611220,0irq_work/3381rcuc/307:11:153
3611200,0irq_work/3381rcuc/307:32:523
3611200,0irq_work/3381rcuc/307:32:523
3611140,0irq_work/3381rcuc/309:57:553
3611040,0irq_work/3381rcuc/308:32:513
3611010,0irq_work/3381rcuc/308:17:473
3611000,0irq_work/3381rcuc/307:58:253
361950,0irq_work/3381rcuc/310:28:253
361950,0irq_work/3381rcuc/309:17:263
361940,0irq_work/3381rcuc/311:42:583
361940,0irq_work/3381rcuc/308:42:473
361940,0irq_work/3381rcuc/308:42:473
361920,0irq_work/3381rcuc/308:58:253
361920,0irq_work/3381rcuc/307:42:553
361910,0irq_work/3381rcuc/308:12:473
361900,0irq_work/3381rcuc/310:42:383
361900,0irq_work/3381rcuc/307:17:553
361890,0irq_work/3381rcuc/311:33:073
361890,0irq_work/3381rcuc/311:07:243
361890,0irq_work/3381rcuc/311:07:243
361880,0irq_work/3381rcuc/308:30:563
361870,0irq_work/3381rcuc/311:47:523
361870,0irq_work/3381rcuc/311:17:063
291850,0irq_work/2311rcuc/209:42:262
221850,0irq_work/1241rcuc/111:52:551
361840,0irq_work/3381rcuc/310:49:383
361820,0irq_work/3381rcuc/310:07:553
361820,0irq_work/3381rcuc/308:23:003
361820,0irq_work/3381rcuc/307:27:563
361810,0irq_work/3381rcuc/309:47:473
291810,0irq_work/2311rcuc/208:58:202
361790,0irq_work/3381rcuc/311:41:103
291780,0irq_work/2311rcuc/211:28:242
291780,0irq_work/2311rcuc/211:24:482
361770,0irq_work/3381rcuc/307:02:423
361760,0irq_work/3381rcuc/311:11:243
361760,0irq_work/3381rcuc/309:37:543
361760,0irq_work/3381rcuc/309:22:263
361760,0irq_work/3381rcuc/308:42:203
291760,0irq_work/2311rcuc/210:38:002
181760,0irq_work/0161rcuc/008:33:010
361750,0irq_work/3381rcuc/308:12:263
361750,0irq_work/3381rcuc/307:24:013
361740,0irq_work/3381rcuc/311:52:463
361740,0irq_work/3381rcuc/309:42:443
361740,0irq_work/3381rcuc/307:52:473
291730,0irq_work/2311rcuc/207:18:392
361720,0irq_work/3381rcuc/312:02:583
361710,0irq_work/3381rcuc/312:27:543
361710,0irq_work/3381rcuc/310:12:553
361710,0irq_work/3381rcuc/307:42:163
291710,0irq_work/2311rcuc/211:02:332
291710,0irq_work/2311rcuc/211:02:332
291710,0irq_work/2311rcuc/207:12:552
361700,0irq_work/3381rcuc/309:32:473
361690,0irq_work/3381rcuc/311:57:263
361690,0irq_work/3381rcuc/310:37:563
1748299696,0cyclictest2399migration/108:04:041
1747599693,0cyclictest1799migration/011:47:550
361680,0irq_work/3381rcuc/310:57:563
291680,0irq_work/2311rcuc/209:16:292
361670,0irq_work/3381rcuc/311:27:593
221670,0irq_work/1241rcuc/108:52:441
361660,0irq_work/3381rcuc/309:22:563
361650,0irq_work/3381rcuc/311:26:423
361650,0irq_work/3381rcuc/307:16:573
291650,0irq_work/2311rcuc/208:40:552
1747599653,0cyclictest0-21swapper/012:12:530
1747599650,0cyclictest1799migration/008:28:030
361640,0irq_work/3381rcuc/310:52:473
361640,0irq_work/3381rcuc/310:22:433
361640,0irq_work/3381rcuc/310:17:493
221640,0irq_work/1241rcuc/107:27:451
181630,0irq_work/0161rcuc/010:34:320
361620,0irq_work/3381rcuc/310:36:443
361620,0irq_work/3381rcuc/310:02:423
361620,0irq_work/3381rcuc/308:52:473
361620,0irq_work/3381rcuc/308:06:473
291620,0irq_work/2311rcuc/209:27:442
291620,0irq_work/2311rcuc/207:44:042
361610,0irq_work/3381rcuc/309:09:203
361610,0irq_work/3381rcuc/309:02:473
1748299613,0cyclictest2399migration/110:39:501
1748299612,0cyclictest2399migration/111:50:141
361600,0irq_work/3381rcuc/312:07:593
361600,0irq_work/3381rcuc/312:07:593
291600,0irq_work/2311rcuc/208:18:322
1748299601,0cyclictest2399migration/109:28:091
141600,0rcu_preempt22618-21grep11:07:510
1748299593,0cyclictest2399migration/110:52:431
1747599593,0cyclictest19186-21runrttasks07:05:320
17475995919,0cyclictest1946-21grep08:58:070
291580,0irq_work/2311rcuc/211:07:502
291580,0irq_work/2311rcuc/210:00:202
291580,0irq_work/2311rcuc/207:55:022
17482995824,0cyclictest30925-21grep10:08:051
1747599589,0cyclictest4354-21munin-node11:42:430
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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