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2022-12-05 - 01:23

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

Latency plot of system in rack #d, slot #2
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 rackdslot2.osadl.org (updated Sun Dec 04, 2022 12:46:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1339911380,4ptp4l401ktimersoftd/307:08:473
201582133112,10sleep10-21swapper/107:07:551
20014210381,10sleep20-21swapper/207:06:022
297252770,8sleep32074899cyclictest12:05:003
200322777,58sleep00-21swapper/007:06:150
20745996957,7cyclictest9-21ksoftirqd/009:05:110
20745996957,7cyclictest9-21ksoftirqd/009:05:110
39692640,8sleep12074699cyclictest10:00:211
133991620,1ptp4l401ktimersoftd/311:45:213
252022610,6sleep02074599cyclictest10:45:160
20745995743,8cyclictest9-21ksoftirqd/009:00:150
133991570,1ptp4l391rcuc/312:10:313
192672560,5sleep341-21ksoftirqd/310:30:423
20745995541,7cyclictest9-21ksoftirqd/009:30:150
133991550,1ptp4l391rcuc/309:11:243
20745995340,7cyclictest9-21ksoftirqd/008:55:130
129891530,3getstats2074899cyclictest11:21:313
133991520,1ptp4l401ktimersoftd/311:34:123
133991520,1ptp4l401ktimersoftd/308:02:373
133991500,1ptp4l401ktimersoftd/309:44:453
20745994937,6cyclictest9-21ksoftirqd/010:35:130
20745994739,4cyclictest9-21ksoftirqd/008:45:000
133991460,1ptp4l401ktimersoftd/309:55:003
20745994437,4cyclictest9-21ksoftirqd/007:40:220
133991440,1ptp4l401ktimersoftd/310:17:353
20745994336,4cyclictest9-21ksoftirqd/008:40:000
133991430,1ptp4l401ktimersoftd/307:52:253
133991420,1ptp4l401ktimersoftd/307:27:493
55498410,9rtkit-daemon0-21swapper/108:40:511
20748994134,4cyclictest41-21ksoftirqd/307:55:143
20747994110,4cyclictest33-21ksoftirqd/208:40:302
20745994128,7cyclictest9-21ksoftirqd/007:35:120
20747994033,4cyclictest33-21ksoftirqd/212:15:182
20745994034,3cyclictest9-21ksoftirqd/008:30:230
20745994033,4cyclictest9-21ksoftirqd/007:15:200
20745994030,6cyclictest9-21ksoftirqd/010:10:210
133991400,1ptp4l401ktimersoftd/307:31:213
20748993932,4cyclictest41-21ksoftirqd/309:20:243
20747993931,5cyclictest33-21ksoftirqd/209:35:122
20745993934,3cyclictest9-21ksoftirqd/011:25:000
20745993934,3cyclictest9-21ksoftirqd/007:45:280
20745993933,4cyclictest9-21ksoftirqd/010:25:260
20745993933,3cyclictest9-21ksoftirqd/011:40:010
20745993933,3cyclictest9-21ksoftirqd/011:40:000
133991390,1ptp4l401ktimersoftd/311:35:153
133991390,1ptp4l401ktimersoftd/311:35:153
133991390,1ptp4l401ktimersoftd/311:00:383
133991390,1ptp4l401ktimersoftd/309:45:333
133991390,1ptp4l401ktimersoftd/309:15:273
20748993831,4cyclictest41-21ksoftirqd/308:20:013
20747993833,3cyclictest33-21ksoftirqd/207:45:002
20747993831,4cyclictest33-21ksoftirqd/209:45:012
20747993830,4cyclictest33-21ksoftirqd/209:20:162
20745993832,4cyclictest9-21ksoftirqd/012:25:160
20745993831,4cyclictest9-21ksoftirqd/011:10:160
20745993831,4cyclictest9-21ksoftirqd/009:20:000
20745993831,4cyclictest9-21ksoftirqd/008:50:140
133991380,1ptp4l401ktimersoftd/310:23:323
133991380,1ptp4l401ktimersoftd/310:23:323
20748993730,4cyclictest41-21ksoftirqd/311:40:283
20747993731,4cyclictest33-21ksoftirqd/212:05:012
20747993731,3cyclictest33-21ksoftirqd/212:10:002
20747993730,4cyclictest33-21ksoftirqd/208:35:162
20747993729,4cyclictest33-21ksoftirqd/209:45:132
20747993718,5cyclictest33-21ksoftirqd/208:05:262
2074599373,4cyclictest121rcu_preempt10:57:460
20745993731,4cyclictest9-21ksoftirqd/009:25:010
20745993731,3cyclictest9-21ksoftirqd/012:05:010
20745993730,4cyclictest9-21ksoftirqd/011:05:240
20745993730,4cyclictest9-21ksoftirqd/010:45:000
20745993730,4cyclictest9-21ksoftirqd/008:30:000
20748993631,3cyclictest41-21ksoftirqd/308:25:223
20748993630,3cyclictest41-21ksoftirqd/312:40:003
20748993629,4cyclictest41-21ksoftirqd/310:53:293
20748993629,4cyclictest41-21ksoftirqd/310:35:123
20747993631,3cyclictest33-21ksoftirqd/210:30:012
20747993631,3cyclictest33-21ksoftirqd/209:55:192
20747993630,4cyclictest33-21ksoftirqd/210:55:212
20747993630,4cyclictest33-21ksoftirqd/209:05:202
20747993630,4cyclictest33-21ksoftirqd/209:05:192
20747993630,3cyclictest33-21ksoftirqd/211:24:592
20747993628,4cyclictest33-21ksoftirqd/208:30:142
20747993623,10cyclictest33-21ksoftirqd/209:50:352
20746993630,4cyclictest25-21ksoftirqd/107:40:211
20746993625,4cyclictest25-21ksoftirqd/111:16:081
20745993631,3cyclictest9-21ksoftirqd/007:50:330
20745993631,3cyclictest9-21ksoftirqd/007:10:120
20745993630,4cyclictest9-21ksoftirqd/011:30:190
20745993630,4cyclictest9-21ksoftirqd/010:05:150
20745993630,4cyclictest9-21ksoftirqd/010:00:000
20745993630,4cyclictest9-21ksoftirqd/009:10:210
20745993630,3cyclictest9-21ksoftirqd/011:25:200
20745993629,4cyclictest9-21ksoftirqd/012:10:000
20745993629,4cyclictest9-21ksoftirqd/008:45:150
133991360,28ptp4l35292irq/88-enp1s0-T11:55:393
1338913629,3phc2sys41-21ksoftirqd/308:20:193
20748993530,3cyclictest41-21ksoftirqd/307:45:213
20748993529,3cyclictest41-21ksoftirqd/308:55:213
20748993528,4cyclictest41-21ksoftirqd/307:35:143
20747993529,4cyclictest33-21ksoftirqd/210:00:182
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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