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2026-07-19 - 16:35

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot6s.osadl.org (updated Sun Jul 19, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2348208996928,5cyclictest0-21swapper/010:30:310
2348208996732,30cyclictest2356993-21grep07:55:290
2348208996356,5cyclictest0-21swapper/009:00:130
234821099613,15cyclictest0-21swapper/112:30:011
2348208996054,3cyclictest0-21swapper/008:30:120
2348212995950,4cyclictest311ktimers/208:50:002
2348212995950,4cyclictest311ktimers/208:50:002
2348212995846,8cyclictest2402122-21munin-plugin-st12:25:002
2348212995447,5cyclictest311ktimers/212:00:012
2348212995441,9cyclictest2362991-21apt-get08:35:012
2348212995340,10cyclictest311ktimers/207:10:152
2348212995340,10cyclictest311ktimers/207:10:152
2348208995342,7cyclictest0-21swapper/012:10:000
2348210995238,8cyclictest0-21swapper/109:35:011
2348210995237,10cyclictest231ktimers/110:25:131
2348210995237,10cyclictest231ktimers/110:25:121
2348212995139,7cyclictest0-21swapper/209:35:312
234820899514,44cyclictest2367261-21unixbench_singl08:55:310
234820899506,41cyclictest0-21swapper/010:10:200
2348212994836,8cyclictest2359577-21grep08:10:292
2348210994827,13cyclictest231ktimers/108:35:111
2348208994841,4cyclictest0-21swapper/008:35:100
2348208994841,2cyclictest0-21swapper/009:30:010
234820899482,43cyclictest2380788-21grep10:15:270
2348212994732,8cyclictest0-21swapper/207:30:302
2348212994730,11cyclictest311ktimers/210:50:122
2348208994739,5cyclictest2352681-21munin-plugin-st07:35:000
2348208994739,5cyclictest0-21swapper/011:20:250
2348208994739,5cyclictest0-21swapper/011:20:240
234820899473,8cyclictest2386811-21cron10:54:590
2348208994735,8cyclictest0-21swapper/012:25:300
2348208994731,12cyclictest2353520-21tail07:35:280
2348208994721,23cyclictest15-21rcuc/011:50:010
2348208994639,4cyclictest12-21ksoftirqd/010:20:220
234820899463,39cyclictest0-21swapper/009:30:170
2348208994632,8cyclictest2385038-21grep10:40:280
2348212994540,3cyclictest311ktimers/208:55:132
234820899453,5cyclictest2404613-21users12:35:290
2348208994534,7cyclictest2395300-21grep11:40:290
2348208994532,7cyclictest2379164-21grep10:05:270
2348210994432,8cyclictest2392592-21mailstats11:25:311
2348210994432,8cyclictest2375851-21munin-plugin-st09:50:001
2348210994432,8cyclictest2350150-21sendmail07:20:001
2348208994433,6cyclictest2384287-21munin-run10:39:590
2348208994432,7cyclictest2389285-21grep11:05:290
2348208994428,12cyclictest0-21swapper/011:15:290
2348212994332,6cyclictest0-21swapper/212:15:012
2348212994331,8cyclictest2392687-21grep11:25:322
2348212994330,9cyclictest0-21swapper/209:10:282
234821099436,30cyclictest832-21systemd-network07:14:501
234821099436,30cyclictest832-21systemd-network07:14:501
2348210994333,6cyclictest0-21swapper/107:40:001
2348210994332,7cyclictest2355557-21grep07:50:021
234820899434,5cyclictest0-21swapper/010:55:280
234820899433,9cyclictest2397779-21tail11:55:290
2348208994336,4cyclictest20650irq/252-8000000.ethernet08:15:240
2348208994329,9cyclictest0-21swapper/011:40:010
2348208994329,6cyclictest0-21swapper/008:45:280
2348208994329,6cyclictest0-21swapper/008:45:280
2348208994327,13cyclictest2349115-21latency_hist07:15:010
2348208994327,13cyclictest2349115-21latency_hist07:15:010
234820899432,4cyclictest2362267-21sed08:30:000
2348208994324,15cyclictest2350135-21cron07:20:020
234820899432,3cyclictest0-21swapper/009:45:010
234820899431,4cyclictest2364780-21munin-run08:45:010
2348212994232,6cyclictest2368079-21grep09:00:292
2348212994226,12cyclictest311ktimers/211:20:152
2348212994226,12cyclictest311ktimers/211:20:152
2348210994232,5cyclictest2369738-21grep09:10:281
2348208994231,8cyclictest2350151-21sendmail07:20:000
2348208994231,7cyclictest2400381-21grep12:10:280
2348208994230,6cyclictest2365918-21cut08:50:180
2348208994229,9cyclictest0-21swapper/008:20:270
2348208994229,9cyclictest0-21swapper/008:20:270
2348208994226,11cyclictest131ktimers/008:10:160
2348208994218,21cyclictest2354771-21tune2fs07:45:200
234820899421,4cyclictest2377193-21memory09:55:260
234820899421,39cyclictest131ktimers/012:00:210
234820899421,39cyclictest0-21swapper/009:10:200
2348212994135,4cyclictest2358715-21unixbench_singl08:05:302
234821299410,23cyclictest0-21swapper/208:30:012
234821099419,17cyclictest0-21swapper/109:00:001
234821099417,16cyclictest24-21ksoftirqd/111:15:011
2348210994128,9cyclictest0-21swapper/108:35:021
2348210994127,10cyclictest231ktimers/109:25:151
2348210994123,11cyclictest0-21swapper/111:40:011
2348208994135,4cyclictest0-21swapper/011:00:100
2348208994133,5cyclictest0-21swapper/012:35:020
234820899412,37cyclictest0-21swapper/011:25:290
2348208994116,17cyclictest0-21swapper/012:25:010
234820899411,5cyclictest2353886-21df07:40:170
234820899411,38cyclictest0-21swapper/009:15:180
2348212994032,4cyclictest0-21swapper/207:35:212
2348212994031,5cyclictest2375801-21grep09:45:312
2348212994028,9cyclictest0-21swapper/210:35:292
2348212994023,13cyclictest311ktimers/211:15:122
2348210994033,5cyclictest231ktimers/110:00:131
2348210994027,9cyclictest231ktimers/109:40:111
2348210994027,9cyclictest0-21swapper/109:55:291
2348210994027,9cyclictest0-21swapper/108:10:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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