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2022-06-27 - 16:29

x86 Intel Xeon E5620 @2400 MHz, Linux 4.19.127-rt55 (Profile)

Latency plot of system in rack #c, slot #0
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 rackcslot0.osadl.org (updated Mon Jun 27, 2022 00:43:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
901921780,5sleep42220899cyclictest00:46:4210
243021320,0sleep50-21swapper/522:59:1111
213792130106,19sleep40-21swapper/419:13:1110
217252121104,13sleep00-21swapper/019:17:080
216892119104,11sleep10-21swapper/119:16:371
1292721150,1sleep120-21swapper/1200:39:534
2221721140,1sleep70-21swapper/719:17:1413
215212114102,8sleep140-21swapper/1419:14:576
21351211076,29sleep110-21swapper/1119:12:463
1345921070,1sleep100-21swapper/1022:49:382
347721050,1sleep150-21swapper/1523:25:187
21512210391,7sleep50-21swapper/519:14:4811
1328521000,0sleep50-21swapper/519:42:3611
308392990,0sleep150-21swapper/1521:49:167
7612970,0sleep120-21swapper/1200:45:464
66922970,6sleep42220899cyclictest22:52:2910
63702970,1sleep70-21swapper/722:45:0213
254282970,1sleep1217362-21nfsd00:22:464
254282970,1sleep1217362-21nfsd00:22:464
177562960,2sleep120-21swapper/1223:37:334
315902950,6sleep122221899cyclictest22:11:254
315902950,6sleep122221899cyclictest22:11:254
233422950,4sleep12114-21ksoftirqd/1223:23:394
200842950,1sleep30-21swapper/300:33:039
318852940,0sleep5571ktimersoftd/523:06:4011
254662940,1sleep60-21swapper/623:56:4312
268492930,0sleep70-21swapper/723:24:0613
136492930,2sleep90-21swapper/900:25:0715
136492930,2sleep90-21swapper/900:25:0715
105792930,0sleep20-21swapper/223:11:268
277072920,0sleep00-21swapper/023:09:320
2134929276,12sleep90-21swapper/919:12:4415
1826529279,8sleep30-21swapper/319:12:229
99752910,0sleep20-21swapper/200:13:148
99752910,0sleep20-21swapper/200:13:148
304582910,1sleep20-21swapper/200:04:408
304582910,1sleep20-21swapper/200:04:408
270642910,1sleep60-21swapper/622:07:0212
270642910,1sleep60-21swapper/622:07:0212
139302910,1sleep30-21swapper/323:33:239
270102900,1sleep10-21swapper/121:20:401
109572890,1sleep10-21swapper/123:18:231
105242890,0sleep140-21swapper/1423:00:086
37542880,1sleep10-21swapper/100:46:071
34682880,1sleep103465-21systemd-cgroups23:21:282
2147128772,10sleep60-21swapper/619:14:1712
96342860,0sleep20-21swapper/222:08:348
96342860,0sleep20-21swapper/222:08:348
7012860,0sleep140-21swapper/1421:31:526
320832850,1sleep120-21swapper/1222:37:064
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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