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2023-01-30 - 05:28

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 Jan 30, 2023 00:43:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3072521620,7sleep61103299cyclictest23:43:3512
1787021460,5sleep111103899cyclictest19:25:493
537321420,0sleep120-21swapper/1223:31:234
10392211994,20sleep130-21swapper/1319:18:395
132021180,2sleep50-21swapper/522:49:3211
105082118102,12sleep20-21swapper/219:19:328
880021170,5sleep151104499cyclictest00:05:407
2953621170,1sleep110-21swapper/1122:10:503
2953621170,1sleep110-21swapper/1122:10:503
2641121160,4sleep61103299cyclictest00:07:5612
218921160,0sleep80-21swapper/822:07:0314
218921160,0sleep80-21swapper/822:07:0314
10517211387,21sleep110-21swapper/1119:19:413
10499211293,10sleep100-21swapper/1019:19:242
258221110,6sleep41103099cyclictest23:39:4810
2040921100,1sleep130-21swapper/1323:25:315
10291210992,12sleep30-21swapper/319:17:099
2455321070,3sleep121104099cyclictest23:46:544
10313210790,9sleep80-21swapper/819:17:3014
2938821050,1sleep150-21swapper/1523:34:387
2175521050,1sleep130-21swapper/1322:18:065
2175521050,1sleep130-21swapper/1322:18:065
1663821050,0sleep110-21swapper/1123:28:573
1156821050,1sleep120-21swapper/1222:16:444
1156821050,1sleep120-21swapper/1222:16:444
771021020,0sleep90-21swapper/900:09:5115
605421020,1sleep150-21swapper/1522:15:597
605421020,1sleep150-21swapper/1522:15:597
520821020,4sleep01102299cyclictest23:23:250
1779721020,1sleep90-21swapper/923:50:1915
10424210190,7sleep50-21swapper/519:19:0311
3016921000,1sleep10-21swapper/123:43:301
120022980,0sleep90-21swapper/900:47:1815
51662960,1sleep70-21swapper/723:02:0813
316182960,1sleep120-21swapper/1200:29:264
316182960,1sleep120-21swapper/1200:29:264
30572960,1sleep110-21swapper/1122:57:393
69562940,0sleep50-21swapper/521:55:4511
91322930,0sleep50-21swapper/523:11:1211
243832930,0sleep80-21swapper/822:14:3214
243832930,0sleep80-21swapper/822:14:3214
23152930,1sleep140-21swapper/1423:27:086
324532920,0sleep60-21swapper/623:01:1912
260912920,0sleep20-21swapper/219:35:508
930529182,4sleep00-21swapper/019:15:460
19332910,1sleep80-21swapper/823:48:1014
1050729175,4sleep10-21swapper/119:19:311
291442900,1sleep80-21swapper/800:04:1314
200952900,1sleep70-21swapper/721:32:1513
953228973,9sleep60-21swapper/619:15:5212
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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