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2022-08-11 - 15:54

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, highest latencies:
System rackdslot1.osadl.org (updated Thu Aug 11, 2022 12:46:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
428922610,7sleep10-21swapper/107:05:121
1176911960,13ptp4l0-21swapper/207:07:562
1176911770,15ptp4l0-21swapper/007:06:330
2487721710,4sleep1663899cyclictest08:55:181
1176911660,20ptp4l4268-21/usr/sbin/munin07:05:303
1868021420,7sleep1663899cyclictest07:35:051
117691690,5ptp4l13009-21latency_hist09:40:003
117691680,19ptp4l0-21swapper/210:05:282
117691670,4ptp4l11773-21apt-get08:30:043
117691670,4ptp4l11773-21apt-get08:30:043
117691640,2ptp4l0-21swapper/208:32:052
117691640,2ptp4l0-21swapper/208:32:042
117691640,10ptp4l0-21swapper/212:35:152
117691630,2ptp4l0-21swapper/210:35:232
117691630,20ptp4l0-21swapper/309:45:233
140592620,2sleep00-21swapper/009:40:260
117691620,5ptp4l20929-21sh11:05:173
117691620,5ptp4l20929-21sh11:05:173
117691620,1ptp4l0-21swapper/311:00:203
238012600,2sleep30-21swapper/312:20:153
117691600,5ptp4l29509-21runrttasks11:23:560
117691600,2ptp4l0-21swapper/209:08:352
37072590,2sleep00-21swapper/011:35:320
117691590,6ptp4l25851-21cat08:55:312
117691590,2ptp4l0-21swapper/311:20:003
117691590,2ptp4l0-21swapper/110:25:531
117691580,2ptp4l0-21swapper/308:49:303
6637995750,4cyclictest9-21ksoftirqd/012:30:160
223892570,2sleep00-21swapper/010:00:000
117691570,4ptp4l4815-21rs:main2
117691570,2ptp4l0-21swapper/207:30:202
117691560,1ptp4l0-21swapper/309:55:193
117691550,2ptp4l0-21swapper/309:00:243
117691550,2ptp4l0-21swapper/211:37:432
117691550,2ptp4l0-21swapper/209:15:332
117691550,2ptp4l0-21swapper/011:12:530
117691550,1ptp4l0-21swapper/311:40:003
117691550,1ptp4l0-21swapper/110:03:391
117691540,5ptp4l2592-21ntpq09:15:261
117691540,2ptp4l0-21swapper/310:49:133
117691540,2ptp4l0-21swapper/210:20:332
117691540,1ptp4l0-21swapper/208:05:012
117691540,13ptp4l0-21swapper/311:56:573
117691530,4ptp4l1159-21snmpd10:14:032
117691530,2ptp4l0-21swapper/310:04:183
117691530,2ptp4l0-21swapper/211:40:222
117691530,2ptp4l0-21swapper/211:30:182
117691530,2ptp4l0-21swapper/012:00:070
117691530,1ptp4l0-21swapper/310:56:083
117691530,1ptp4l0-21swapper/209:03:002
117691520,2ptp4l0-21swapper/307:40:243
117691520,2ptp4l0-21swapper/209:40:372
117691520,2ptp4l0-21swapper/209:33:542
117691520,2ptp4l0-21swapper/108:32:291
117691520,2ptp4l0-21swapper/108:32:291
117691520,2ptp4l0-21swapper/010:30:160
117691520,1ptp4l0-21swapper/307:54:553
117691520,1ptp4l0-21swapper/110:23:281
117691520,1ptp4l0-21swapper/109:22:321
117791510,12getstats0-21swapper/207:52:132
117691510,2ptp4l0-21swapper/310:54:333
117691510,2ptp4l0-21swapper/307:10:233
117691510,2ptp4l0-21swapper/212:25:462
117691510,2ptp4l0-21swapper/212:25:452
117691510,2ptp4l0-21swapper/208:43:242
117691510,2ptp4l0-21swapper/208:10:342
117691510,1ptp4l0-21swapper/310:20:503
117691510,1ptp4l0-21swapper/211:07:362
117691510,1ptp4l0-21swapper/211:07:352
117691510,1ptp4l0-21swapper/210:15:142
117691510,1ptp4l0-21swapper/110:42:301
117691500,2ptp4l0-21swapper/310:31:533
117691500,2ptp4l0-21swapper/209:49:592
117691500,2ptp4l0-21swapper/208:50:162
117691500,2ptp4l0-21swapper/208:48:522
117691500,2ptp4l0-21swapper/207:20:122
117691500,2ptp4l0-21swapper/207:20:112
117691500,1ptp4l0-21swapper/212:32:472
117691500,1ptp4l0-21swapper/211:20:352
117691500,1ptp4l0-21swapper/209:54:452
117691500,1ptp4l0-21swapper/209:54:442
117691490,4ptp4l31272-21/usr/sbin/munin09:10:293
117691490,2ptp4l0-21swapper/312:04:033
117691490,2ptp4l0-21swapper/310:17:193
117691490,2ptp4l0-21swapper/310:06:003
117691490,2ptp4l0-21swapper/307:37:033
117691490,2ptp4l0-21swapper/307:33:443
117691490,2ptp4l0-21swapper/211:26:152
117691490,2ptp4l0-21swapper/210:34:372
117691490,2ptp4l0-21swapper/208:29:482
117691490,2ptp4l0-21swapper/208:21:082
117691490,2ptp4l0-21swapper/111:02:421
117691490,1ptp4l0-21swapper/210:41:042
117691490,1ptp4l0-21swapper/209:29:282
117691490,1ptp4l0-21swapper/207:59:132
55198480,2rtkit-daemon0-21swapper/109:55:041
117691480,2ptp4l0-21swapper/111:41:041
117691480,2ptp4l0-21swapper/108:26:341
117691480,2ptp4l0-21swapper/011:41:430
117691480,1ptp4l0-21swapper/308:21:423
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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