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2022-11-29 - 17:59

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 Tue Nov 29, 2022 12:46:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1176911810,16ptp4l0-21swapper/007:05:560
1176911480,14ptp4l0-21swapper/107:08:121
1176911410,16ptp4l0-21swapper/207:07:432
1176911190,13ptp4l0-21swapper/307:08:063
117691680,3ptp4l22139-21taskset11:14:400
117691670,23ptp4l1159-21snmpd10:53:262
117691660,2ptp4l0-21swapper/011:20:270
117691660,2ptp4l0-21swapper/011:20:260
117691660,1ptp4l0-21swapper/008:36:170
117691640,5ptp4l27810-21iostat11:25:250
117691640,2ptp4l0-21swapper/010:40:260
117691640,19ptp4l7790-21grep07:15:280
4079996349,8cyclictest33-21ksoftirqd/208:25:132
67982610,2sleep20-21swapper/210:40:262
117691610,2ptp4l0-21swapper/012:10:190
117691590,2ptp4l0-21swapper/212:11:312
117691590,2ptp4l0-21swapper/011:00:340
117691590,1ptp4l0-21swapper/008:05:260
117691580,2ptp4l0-21swapper/110:20:341
117691580,2ptp4l0-21swapper/009:03:470
4080995743,8cyclictest41-21ksoftirqd/308:35:173
117691570,2ptp4l0-21swapper/207:15:322
117691570,2ptp4l0-21swapper/112:35:211
117691570,2ptp4l0-21swapper/110:15:341
117691570,2ptp4l0-21swapper/008:58:420
117691570,1ptp4l0-21swapper/009:48:210
117691570,1ptp4l0-21swapper/009:23:230
117691560,2ptp4l0-21swapper/109:20:331
117691560,2ptp4l0-21swapper/010:38:300
117691560,2ptp4l0-21swapper/009:39:430
117691560,1ptp4l0-21swapper/110:53:581
117691560,1ptp4l0-21swapper/008:22:010
117691550,4ptp4l9635-21hddtemp_smartct07:20:310
117691550,2ptp4l0-21swapper/010:50:490
117691550,1ptp4l0-21swapper/010:05:020
117691550,1ptp4l0-21swapper/010:05:010
306272540,2sleep10-21swapper/111:30:301
117691540,3ptp4l0-21swapper/009:40:200
117691540,2ptp4l0-21swapper/112:00:231
117691540,2ptp4l0-21swapper/107:15:161
117691540,2ptp4l0-21swapper/012:20:200
117691540,2ptp4l0-21swapper/009:28:220
117691540,1ptp4l0-21swapper/011:57:150
117691540,1ptp4l0-21swapper/008:12:300
117691540,11ptp4l0-21swapper/210:49:402
117691540,10ptp4l0-21swapper/008:42:320
4079995340,8cyclictest33-21ksoftirqd/207:10:122
117691530,2ptp4l0-21swapper/012:35:280
117691530,2ptp4l0-21swapper/007:59:230
117691530,1ptp4l0-21swapper/009:08:380
117791520,11getstats0-21swapper/211:05:212
117691520,1ptp4l0-21swapper/011:50:300
117691520,1ptp4l0-21swapper/008:49:550
117691520,10ptp4l0-21swapper/211:51:062
233772510,2sleep10-21swapper/111:15:241
117691510,2ptp4l0-21swapper/012:09:150
117691510,1ptp4l0-21swapper/011:08:430
117691510,1ptp4l0-21swapper/010:15:410
117691510,1ptp4l0-21swapper/008:19:040
117691510,11ptp4l0-21swapper/010:59:070
117691510,10ptp4l0-21swapper/211:32:452
117791500,9getstats0-21swapper/207:40:212
117691500,2ptp4l0-21swapper/208:46:502
117691500,2ptp4l0-21swapper/108:24:181
117691500,2ptp4l0-21swapper/009:10:120
117691500,1ptp4l0-21swapper/008:27:140
117691490,1ptp4l0-21swapper/211:22:302
117691490,1ptp4l0-21swapper/211:22:302
117691490,1ptp4l0-21swapper/012:01:560
117691490,1ptp4l0-21swapper/011:38:580
117691490,1ptp4l0-21swapper/010:03:290
117691490,1ptp4l0-21swapper/010:03:280
117691490,1ptp4l0-21swapper/008:50:320
117691490,1ptp4l0-21swapper/008:50:320
117691490,1ptp4l0-21swapper/008:03:040
117691480,2ptp4l0-21swapper/312:38:283
117691480,2ptp4l0-21swapper/311:06:543
117691480,2ptp4l0-21swapper/112:33:381
117691480,2ptp4l0-21swapper/109:17:471
117691480,2ptp4l0-21swapper/108:10:391
117691480,2ptp4l0-21swapper/011:33:580
117691480,2ptp4l0-21swapper/011:16:140
117691480,2ptp4l0-21swapper/010:48:500
117691480,2ptp4l0-21swapper/009:56:240
117691480,1ptp4l0-21swapper/307:23:023
117691480,1ptp4l0-21swapper/112:19:131
117691480,1ptp4l0-21swapper/110:43:231
117691480,1ptp4l0-21swapper/110:28:261
117691480,1ptp4l0-21swapper/109:58:141
117691480,1ptp4l0-21swapper/108:43:231
117691480,1ptp4l0-21swapper/108:18:131
117691480,1ptp4l0-21swapper/011:46:430
4079994735,7cyclictest33-21ksoftirqd/210:15:202
117791470,9getstats0-21swapper/208:07:082
117791470,9getstats0-21swapper/207:35:142
117791470,9getstats0-21swapper/207:35:142
117691470,8ptp4l0-21swapper/210:03:062
117691470,8ptp4l0-21swapper/210:03:052
117691470,8ptp4l0-21swapper/208:38:162
117691470,5ptp4l1142-21runrttasks09:08:492
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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