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2026-05-27 - 20:42

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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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 Wed May 27, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811210,0rcu_preempt3-21ksoftirqd/011:33:410
811120,0rcu_preempt3-21ksoftirqd/011:19:130
811040,0rcu_preempt4721-21ping08:23:011
811040,0rcu_preempt19-21ksoftirqd/109:13:301
81990,0rcu_preempt19-21ksoftirqd/112:08:071
81910,0rcu_preempt27104-21kworker/u4:010:18:131
81890,0rcu_preempt3-21ksoftirqd/009:58:140
81870,0rcu_preempt54-21kswapd011:49:041
9950860,0irq/345-4848400111rcuc/010:18:070
81860,0rcu_preempt19-21ksoftirqd/108:03:111
81850,0rcu_preempt23477-21ssh11:13:121
81820,0rcu_preempt19-21ksoftirqd/110:17:181
9950810,0irq/345-484840041ktimersoftd/012:21:140
10050810,0irq/346-4848400111rcuc/010:10:310
2096299807,0cyclictest14835-1kworker/0:1H11:07:490
81780,0rcu_preempt3-21ksoftirqd/011:49:240
81750,0rcu_preempt3-21ksoftirqd/010:40:310
81750,0rcu_preempt0-21swapper/112:20:211
81740,0rcu_preempt0-21swapper/111:30:101
81740,0rcu_preempt0-21swapper/111:05:101
9950730,0irq/345-4848400111rcuc/011:22:560
81680,0rcu_preempt3-21ksoftirqd/010:55:300
81670,0rcu_preempt3096-21wget10:53:071
20962996715,0cyclictest5208-21ssh11:27:590
81660,0rcu_preempt19-21ksoftirqd/112:07:181
81660,0rcu_preempt19-21ksoftirqd/107:39:521
81650,0rcu_preempt19-21ksoftirqd/110:27:031
2096299651,0cyclictest27687-1kworker/0:3H09:13:440
2096299644,0cyclictest0-21swapper/012:03:010
2096299637,0cyclictest5361-1kworker/0:2H12:12:590
2096299632,0cyclictest24241-21ping07:27:500
81620,0rcu_preempt19-21ksoftirqd/110:50:461
2096299624,0cyclictest0-21swapper/010:23:060
81610,0rcu_preempt19-21ksoftirqd/109:19:211
2096299611,0cyclictest24241-21ping07:28:080
20962996110,0cyclictest10050irq/346-484840010:37:080
81600,0rcu_preempt19-21ksoftirqd/111:41:041
81600,0rcu_preempt19-21ksoftirqd/109:56:301
81600,0rcu_preempt10016-21munin-node1
2096299603,0cyclictest0-21swapper/011:08:000
2096299602,0cyclictest30840-1kworker/0:0H09:12:210
2096299602,0cyclictest30840-1kworker/0:0H09:12:210
2096299602,0cyclictest0-21swapper/009:48:090
20962996014,0cyclictest0-21swapper/008:08:120
20962996012,0cyclictest9486-21idleruntime-cro12:37:490
81590,0rcu_preempt3-21ksoftirqd/008:13:010
81590,0rcu_preempt19-21ksoftirqd/112:35:241
2096299592,0cyclictest15366-21dropbear11:38:020
20962995916,0cyclictest26459-21munin-node0
20962995911,0cyclictest8232-21munin-run08:07:490
2096299591,0cyclictest32166-1kworker/0:0H11:55:000
2096299591,0cyclictest23318-1kworker/0:1H09:37:480
81580,0rcu_preempt19-21ksoftirqd/112:32:251
81580,0rcu_preempt19-21ksoftirqd/110:35:181
81580,0rcu_preempt17260-21ntp_states08:33:130
2096299585,0cyclictest10050irq/346-484840012:02:250
2096299583,0cyclictest0-21swapper/011:16:310
2096299583,0cyclictest0-21swapper/007:38:240
2096299582,0cyclictest32260-21munin-node0
2096299582,0cyclictest0-21swapper/009:26:520
2096299581,0cyclictest31004-1kworker/0:0H10:59:000
2096299581,0cyclictest27954-21diskmemload11:43:060
2096299574,0cyclictest0-21swapper/009:57:370
2096299572,0cyclictest27368-21ssh10:44:290
2096299572,0cyclictest0-21swapper/010:14:410
2096299571,0cyclictest24241-21ping07:18:070
2096299568,0cyclictest0-21swapper/009:43:110
2096299562,0cyclictest0-21swapper/010:48:450
2096299561,0cyclictest0-21swapper/012:25:030
81550,0rcu_preempt30576-21kworker/1:011:43:001
2096299555,0cyclictest24241-21ping07:43:020
2096299552,0cyclictest0-21swapper/008:38:080
81540,0rcu_preempt3-21ksoftirqd/007:08:070
81540,0rcu_preempt3-21ksoftirqd/007:03:030
81540,0rcu_preempt19-21ksoftirqd/111:22:371
2096299543,0cyclictest0-21swapper/009:28:500
2096299541,0cyclictest24241-21ping07:33:020
81530,0rcu_preempt30988-21ssh09:43:111
81530,0rcu_preempt19-21ksoftirqd/110:02:591
2096299533,0cyclictest0-21swapper/012:10:170
20962995316,0cyclictest0-21swapper/010:29:180
81520,0rcu_preempt19-21ksoftirqd/108:08:431
2096299522,0cyclictest0-21swapper/009:17:520
81510,0rcu_preempt3-21ksoftirqd/008:28:360
81510,0rcu_preempt19-21ksoftirqd/112:23:091
81510,0rcu_preempt17710-21kworker/0:008:53:120
81490,0rcu_preempt27954-21diskmemload10:11:391
81490,0rcu_preempt25194-21munin-node1
81490,0rcu_preempt19-21ksoftirqd/109:39:591
81490,0rcu_preempt19-21ksoftirqd/107:48:051
20963994911,0cyclictest27954-21diskmemload11:11:051
2096299491,0cyclictest4721-21ping07:58:110
2096299491,0cyclictest24241-21ping07:17:500
2096299491,0cyclictest0-21swapper/010:06:420
81480,0rcu_preempt54-21kswapd009:29:531
81480,0rcu_preempt3-21ksoftirqd/008:18:020
81480,0rcu_preempt19-21ksoftirqd/111:36:131
10050480,0irq/346-48484002096399cyclictest10:00:591
81470,0rcu_preempt3460-21apt-get07:53:030
81470,0rcu_preempt3-21ksoftirqd/008:44:220
81470,0rcu_preempt19-21ksoftirqd/108:48:101
81470,0rcu_preempt19-21ksoftirqd/108:18:001
81470,0rcu_preempt19-21ksoftirqd/107:35:471
9950460,0irq/345-48484002096399cyclictest12:12:591
81460,0rcu_preempt4721-21ping07:58:051
81460,0rcu_preempt3-21ksoftirqd/008:48:080
81460,0rcu_preempt19-21ksoftirqd/111:58:411
81460,0rcu_preempt19-21ksoftirqd/110:57:571
81460,0rcu_preempt19-21ksoftirqd/107:56:211
2096399469,0cyclictest12293-1kworker/1:3H10:31:331
2096299461,0cyclictest0-21swapper/008:58:160
81450,0rcu_preempt3-21ksoftirqd/008:22:500
81450,0rcu_preempt3-21ksoftirqd/007:48:000
81450,0rcu_preempt23412-21ntp_states07:13:141
81440,0rcu_preempt24410-21ssh09:36:371
81440,0rcu_preempt19-21ksoftirqd/109:25:511
81440,0rcu_preempt19-21ksoftirqd/107:23:211
81440,0rcu_preempt19-21ksoftirqd/107:20:201
2096399447,0cyclictest555-21ssh11:23:081
20963994414,0cyclictest10050irq/346-484840009:12:221
20963994414,0cyclictest10050irq/346-484840009:12:221
20963994411,0cyclictest23691-21latency08:53:111
81430,0rcu_preempt19-21ksoftirqd/109:03:041
81430,0rcu_preempt19-21ksoftirqd/108:58:031
81430,0rcu_preempt19-21ksoftirqd/107:28:551
2096399438,0cyclictest851-21rngd11:53:021
20963994312,0cyclictest20110-21forks08:43:051
81420,0rcu_preempt19-21ksoftirqd/110:38:081
2096399422,0cyclictest22239-21runrttasks07:09:111
20963994210,0cyclictest27954-21diskmemload09:51:561
1699410,0migration/120025-21runrttasks07:03:101
81400,0rcu_preempt3-21ksoftirqd/009:03:040
81400,0rcu_preempt19-21ksoftirqd/107:43:261
81400,0rcu_preempt16165-1kworker/1:2H08:31:041
81370,0rcu_preempt19-21ksoftirqd/108:38:001
2096399379,0cyclictest0-21swapper/108:33:101
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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