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2025-07-14 - 21:19

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #a, slot #5

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 highest latencies:
System rackaslot5s.osadl.org (updated Mon Jul 14, 2025 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811170,0rcu_preempt19-21ksoftirqd/109:49:421
811110,0rcu_preempt19-21ksoftirqd/108:42:081
811060,0rcu_preempt19826-21ssh09:27:431
811030,0rcu_preempt19-21ksoftirqd/111:47:041
811010,0rcu_preempt19-21ksoftirqd/110:41:301
81980,0rcu_preempt19-21ksoftirqd/108:33:031
81950,0rcu_preempt19-21ksoftirqd/110:00:491
81940,0rcu_preempt54-21kswapd010:22:101
81940,0rcu_preempt19-21ksoftirqd/110:02:271
81940,0rcu_preempt19-21ksoftirqd/108:11:581
81930,0rcu_preempt19-21ksoftirqd/109:12:031
81920,0rcu_preempt54-21kswapd010:53:001
81920,0rcu_preempt19-21ksoftirqd/108:23:001
81910,0rcu_preempt54-21kswapd011:44:431
81900,0rcu_preempt19-21ksoftirqd/112:05:241
81890,0rcu_preempt19-21ksoftirqd/111:37:491
81890,0rcu_preempt19-21ksoftirqd/109:56:181
81880,0rcu_preempt19-21ksoftirqd/112:17:081
81880,0rcu_preempt19-21ksoftirqd/112:12:301
81880,0rcu_preempt19-21ksoftirqd/111:53:351
81880,0rcu_preempt19-21ksoftirqd/110:28:101
81880,0rcu_preempt13877-21ssh11:31:001
10050880,0irq/346-484840028224-1kworker/0:0H09:42:160
81870,0rcu_preempt19-21ksoftirqd/112:30:171
81870,0rcu_preempt19-21ksoftirqd/111:17:261
81870,0rcu_preempt19-21ksoftirqd/110:43:131
81870,0rcu_preempt19-21ksoftirqd/107:42:221
81860,0rcu_preempt19-21ksoftirqd/107:47:021
81860,0rcu_preempt0-21swapper/110:33:591
81850,0rcu_preempt54-21kswapd011:35:431
81850,0rcu_preempt54-21kswapd009:09:441
81850,0rcu_preempt19-21ksoftirqd/111:02:101
81850,0rcu_preempt19-21ksoftirqd/109:42:091
81850,0rcu_preempt19-21ksoftirqd/109:22:431
81820,0rcu_preempt19-21ksoftirqd/109:17:051
81810,0rcu_preempt19-21ksoftirqd/111:12:041
81810,0rcu_preempt19-21ksoftirqd/110:19:151
81810,0rcu_preempt19-21ksoftirqd/109:38:161
81810,0rcu_preempt19-21ksoftirqd/107:37:271
81810,0rcu_preempt0-21swapper/109:32:451
81800,0rcu_preempt19-21ksoftirqd/110:12:151
81780,0rcu_preempt753-21rngd12:10:411
81750,0rcu_preempt19-21ksoftirqd/111:57:551
81740,0rcu_preempt3-21ksoftirqd/010:57:170
81730,0rcu_preempt3-21ksoftirqd/011:07:050
81730,0rcu_preempt3-21ksoftirqd/011:07:050
81730,0rcu_preempt19-21ksoftirqd/112:22:051
81730,0rcu_preempt19-21ksoftirqd/110:50:151
81720,0rcu_preempt19-21ksoftirqd/111:08:191
81720,0rcu_preempt19-21ksoftirqd/111:08:191
81700,0rcu_preempt19-21ksoftirqd/112:36:201
81690,0rcu_preempt3-21ksoftirqd/011:13:500
81690,0rcu_preempt19-21ksoftirqd/110:56:471
81680,0rcu_preempt3-21ksoftirqd/011:02:110
81680,0rcu_preempt19-21ksoftirqd/110:07:491
81670,0rcu_preempt3-21ksoftirqd/010:41:180
81670,0rcu_preempt3-21ksoftirqd/010:16:560
2970999662,0cyclictest32129-21ssh11:52:570
2970999632,0cyclictest11075-21sort09:16:410
2970999631,0cyclictest22538-21egrep11:41:570
81620,0rcu_preempt19-21ksoftirqd/108:02:041
2970999623,0cyclictest0-21swapper/009:22:170
2970999621,0cyclictest0-21swapper/010:29:020
29709996210,0cyclictest0-21swapper/011:36:390
2970999617,0cyclictest0-21swapper/009:47:190
2970999613,0cyclictest0-21swapper/010:08:100
2970999607,0cyclictest3-21ksoftirqd/012:31:340
2970999601,0cyclictest0-21swapper/009:09:060
2970999592,0cyclictest538-21ping07:16:590
2970999592,0cyclictest0-21swapper/007:57:520
81580,0rcu_preempt54-21kswapd007:26:410
2970999582,0cyclictest0-21swapper/012:13:270
2970999582,0cyclictest0-21swapper/009:40:350
29709995815,0cyclictest848250kworker/0:3H10:46:010
2970999581,0cyclictest0-21swapper/009:30:160
81570,0rcu_preempt0-21swapper/111:25:171
2970999562,0cyclictest538-21ping07:36:530
2970999562,0cyclictest0-21swapper/012:11:110
29709995517,0cyclictest0-21swapper/007:26:550
81540,0rcu_preempt19-21ksoftirqd/108:17:201
2970999546,0cyclictest0-21swapper/007:32:180
81530,0rcu_preempt19-21ksoftirqd/108:06:561
81530,0rcu_preempt19-21ksoftirqd/107:12:051
81530,0rcu_preempt19-21ksoftirqd/107:12:051
2970999532,0cyclictest0-21swapper/010:24:190
29709995310,0cyclictest1909250kworker/0:2H12:21:420
81520,0rcu_preempt32353-21meminfo08:52:051
81520,0rcu_preempt19-21ksoftirqd/108:36:561
81510,0rcu_preempt3-21ksoftirqd/010:33:590
81510,0rcu_preempt1227-21diskstats08:56:591
2970999512,0cyclictest0-21swapper/007:42:040
81500,0rcu_preempt3-21ksoftirqd/011:48:580
81500,0rcu_preempt29708-21cyclictest07:58:521
81500,0rcu_preempt2855-21df_abs09:01:571
81500,0rcu_preempt18442-21dropbear11:36:570
10050500,0irq/346-48484001326-21munin-node07:26:551
81490,0rcu_preempt12251-21df_abs07:51:551
2970999491,0cyclictest0-21swapper/010:06:320
81470,0rcu_preempt3-21ksoftirqd/008:07:130
81470,0rcu_preempt19-21ksoftirqd/108:47:021
81470,0rcu_preempt19-21ksoftirqd/107:32:201
81460,0rcu_preempt19-21ksoftirqd/108:26:581
81460,0rcu_preempt19-21ksoftirqd/107:22:181
81460,0rcu_preempt19-21ksoftirqd/107:06:511
81450,0rcu_preempt3-21ksoftirqd/012:01:530
81450,0rcu_preempt30131-21kworker/0:011:19:410
81450,0rcu_preempt19-21ksoftirqd/107:19:551
2970999459,0cyclictest0-21swapper/008:28:500
81440,0rcu_preempt3-21ksoftirqd/010:53:220
81440,0rcu_preempt3-21ksoftirqd/010:47:380
81440,0rcu_preempt3-21ksoftirqd/009:57:010
81440,0rcu_preempt3-21ksoftirqd/008:43:230
81440,0rcu_preempt3-21ksoftirqd/008:40:070
81440,0rcu_preempt3-21ksoftirqd/008:11:590
81440,0rcu_preempt3-21ksoftirqd/007:52:230
81440,0rcu_preempt29247-21users07:02:100
81440,0rcu_preempt26414-21kworker/0:108:54:540
81440,0rcu_preempt13201-21ping08:22:090
81430,0rcu_preempt3-21ksoftirqd/009:52:460
81430,0rcu_preempt3-21ksoftirqd/009:04:160
81430,0rcu_preempt3-21ksoftirqd/008:33:320
81430,0rcu_preempt3-21ksoftirqd/007:49:400
81430,0rcu_preempt13201-21ping08:17:050
81420,0rcu_preempt3-21ksoftirqd/012:33:270
81420,0rcu_preempt3-21ksoftirqd/011:31:030
81420,0rcu_preempt3-21ksoftirqd/011:23:280
81420,0rcu_preempt3-21ksoftirqd/010:12:150
81420,0rcu_preempt3-21ksoftirqd/007:11:550
81420,0rcu_preempt3-21ksoftirqd/007:11:550
81420,0rcu_preempt21920-21kworker/0:009:35:420
81400,0rcu_preempt3-21ksoftirqd/012:19:120
81400,0rcu_preempt3-21ksoftirqd/009:11:540
81400,0rcu_preempt3-21ksoftirqd/008:59:260
81400,0rcu_preempt3-21ksoftirqd/007:07:510
81400,0rcu_preempt30141-21apt-get08:46:540
81390,0rcu_preempt3-21ksoftirqd/012:00:220
81390,0rcu_preempt19-21ksoftirqd/107:05:541
29709993713,0cyclictest0-21swapper/008:01:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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