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2026-07-22 - 06:24

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, 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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  Eltec
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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 all highest latencies:
System rack3slot5s.osadl.org (updated Wed Jul 22, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
338621570sleep1121650irq/29-eth0_g0_00:23:141
1211020ksoftirqd/1121750irq/30-eth0_g0_20:17:291
1211010ksoftirqd/1121750irq/30-eth0_g0_21:46:551
105162940sleep1121750irq/30-eth0_g0_20:27:571
121850ksoftirqd/1121650irq/29-eth0_g0_22:45:440
121850ksoftirqd/1121650irq/29-eth0_g0_22:45:440
121680ksoftirqd/1121750irq/30-eth0_g0_21:53:571
140392660sleep1121750irq/30-eth0_g0_20:42:531
121560ksoftirqd/1121750irq/30-eth0_g0_19:02:590
121560ksoftirqd/1121750irq/30-eth0_g0_00:10:191
121550ksoftirqd/1121750irq/30-eth0_g0_21:17:201
121540ksoftirqd/1121650irq/29-eth0_g0_23:17:501
121530ksoftirqd/1121750irq/30-eth0_g0_21:24:211
121500ksoftirqd/1121750irq/30-eth0_g0_23:51:291
121500ksoftirqd/1121750irq/30-eth0_g0_23:51:291
121490ksoftirqd/1121750irq/30-eth0_g0_19:47:550
48682480sleep0121650irq/29-eth0_g0_00:31:120
121750480irq/30-eth0_g0_263412sleep123:47:211
121650470irq/29-eth0_g0_31ksoftirqd/022:32:530
121470ksoftirqd/1121650irq/29-eth0_g0_19:29:461
121750460irq/30-eth0_g0_1219-21kworker/1:221:52:001
121750460irq/30-eth0_g0_1219-21kworker/1:221:52:001
121460ksoftirqd/1121750irq/30-eth0_g0_21:33:561
121450ksoftirqd/1121750irq/30-eth0_g0_21:07:581
121450ksoftirqd/1121750irq/30-eth0_g0_21:02:570
121450ksoftirqd/1121650irq/29-eth0_g0_20:09:101
247352440sleep0121750irq/30-eth0_g0_23:37:590
121750440irq/30-eth0_g0_31ksoftirqd/023:57:590
121650440irq/29-eth0_g0_13-21kworker/0:122:58:560
166322430sleep1121750irq/30-eth0_g0_23:06:151
121750430irq/30-eth0_g0_41442sleep122:13:431
121430ksoftirqd/1121750irq/30-eth0_g0_21:58:481
121430ksoftirqd/1121650irq/29-eth0_g0_22:08:061
121650420irq/29-eth0_g0_9774-21memory22:37:520
121650420irq/29-eth0_g0_21717-21taskset19:02:481
121650420irq/29-eth0_g0_13-21kworker/0:121:07:510
121650420irq/29-eth0_g0_121ksoftirqd/100:35:570
121420ksoftirqd/1121750irq/30-eth0_g0_22:18:000
121420ksoftirqd/1121650irq/29-eth0_g0_23:39:201
2267499412cyclictest19210-21unixbench_multi21:03:011
2267499411cyclictest25864-21tail19:17:591
121750410irq/30-eth0_g0_31ksoftirqd/022:00:470
121750410irq/30-eth0_g0_1219-21kworker/1:222:26:401
121750410irq/30-eth0_g0_121ksoftirqd/100:19:360
121650410irq/29-eth0_g0_3502-21df_inode22:12:490
121650410irq/29-eth0_g0_31ksoftirqd/021:42:580
121650410irq/29-eth0_g0_31ksoftirqd/021:33:250
121650410irq/29-eth0_g0_31ksoftirqd/019:57:370
121650410irq/29-eth0_g0_1964-21runrttasks21:56:240
121650410irq/29-eth0_g0_13-21kworker/0:122:07:290
121650410irq/29-eth0_g0_13-21kworker/0:121:16:350
121410ksoftirqd/1121650irq/29-eth0_g0_22:22:371
2267499401cyclictest1758-21/usr/sbin/munin00:17:521
121750400irq/30-eth0_g0_1219-21kworker/1:223:33:241
121750400irq/30-eth0_g0_1219-21kworker/1:223:16:301
121750400irq/30-eth0_g0_121ksoftirqd/100:36:491
121650400irq/29-eth0_g0_31ksoftirqd/023:43:380
121650400irq/29-eth0_g0_13-21kworker/0:123:54:500
121650400irq/29-eth0_g0_13-21kworker/0:123:35:150
121650400irq/29-eth0_g0_13-21kworker/0:123:08:490
121650400irq/29-eth0_g0_13-21kworker/0:121:31:590
121650400irq/29-eth0_g0_12910-21ps20:37:590
121650400irq/29-eth0_g0_0-21swapper/019:20:190
121400ksoftirqd/1121650irq/29-eth0_g0_22:06:121
121400ksoftirqd/1121650irq/29-eth0_g0_21:42:021
2267499399cyclictest0-21swapper/122:58:321
121750390irq/30-eth0_g0_1219-21kworker/1:222:38:361
121750390irq/30-eth0_g0_1219-21kworker/1:200:27:591
121750390irq/30-eth0_g0_121ksoftirqd/123:09:251
121750390irq/30-eth0_g0_121ksoftirqd/122:48:421
121750390irq/30-eth0_g0_121ksoftirqd/121:22:371
121650390irq/29-eth0_g0_1964-21runrttasks23:12:520
121650390irq/29-eth0_g0_13-21kworker/0:123:47:500
121650390irq/29-eth0_g0_13-21kworker/0:123:47:500
121650390irq/29-eth0_g0_13-21kworker/0:123:25:090
121650390irq/29-eth0_g0_13-21kworker/0:122:53:380
121650390irq/29-eth0_g0_13-21kworker/0:122:25:310
121650390irq/29-eth0_g0_13-21kworker/0:122:10:240
121650390irq/29-eth0_g0_13-21kworker/0:121:50:200
121650390irq/29-eth0_g0_13-21kworker/0:121:50:200
121650390irq/29-eth0_g0_13-21kworker/0:100:13:510
121390ksoftirqd/118001-21runrttasks20:57:591
121390ksoftirqd/1121650irq/29-eth0_g0_23:59:351
121390ksoftirqd/1121650irq/29-eth0_g0_20:38:321
121390ksoftirqd/1121650irq/29-eth0_g0_20:19:061
41350380irq/23-fsldma-c121ksoftirqd/122:52:581
2267499382cyclictest0-21swapper/119:22:541
2267499381cyclictest25041-21missed_timers21:27:531
2267499381cyclictest23409-21grep19:07:581
2267499381cyclictest15360-21ps20:47:561
121750380irq/30-eth0_g0_1219-21kworker/1:223:29:401
121750380irq/30-eth0_g0_1219-21kworker/1:223:29:401
121750380irq/30-eth0_g0_1219-21kworker/1:222:28:481
121750380irq/30-eth0_g0_121ksoftirqd/120:01:351
121750380irq/30-eth0_g0_0-21swapper/122:45:131
121750380irq/30-eth0_g0_0-21swapper/122:45:131
121650380irq/29-eth0_g0_31913-21mailstats19:42:590
121650380irq/29-eth0_g0_31ksoftirqd/022:48:360
121650380irq/29-eth0_g0_13-21kworker/0:123:30:050
121650380irq/29-eth0_g0_13-21kworker/0:123:30:050
121650380irq/29-eth0_g0_13-21kworker/0:123:06:130
121650380irq/29-eth0_g0_13-21kworker/0:121:37:470
121650380irq/29-eth0_g0_13-21kworker/0:121:18:130
121650380irq/29-eth0_g0_13-21kworker/0:100:10:570
121380ksoftirqd/1121650irq/29-eth0_g0_00:06:291
2267499371cyclictest19715-21diskmemload23:52:491
121750370irq/30-eth0_g0_1219-21kworker/1:200:14:231
121750370irq/30-eth0_g0_121ksoftirqd/122:32:581
121650370irq/29-eth0_g0_31ksoftirqd/019:22:580
121650370irq/29-eth0_g0_28218-21find19:27:560
121650370irq/29-eth0_g0_23151-21ntpdc19:07:540
121650370irq/29-eth0_g0_1964-21runrttasks20:29:410
121650370irq/29-eth0_g0_19429-21df_abs23:17:490
121650370irq/29-eth0_g0_13-21kworker/0:121:23:490
121650370irq/29-eth0_g0_13-21kworker/0:100:22:410
121650370irq/29-eth0_g0_121ksoftirqd/123:25:281
121370ksoftirqd/1121650irq/29-eth0_g0_19:52:501
2267499361cyclictest660-21sshd19:47:551
121750360irq/30-eth0_g0_16785-21unixbench_multi20:53:001
121650360irq/29-eth0_g0_29591-21unixbench_singl19:32:590
121650360irq/29-eth0_g0_24526-21zcat19:12:590
121650360irq/29-eth0_g0_13-21kworker/0:122:29:110
121650360irq/29-eth0_g0_13-21kworker/0:100:06:090
121650360irq/29-eth0_g0_11450-21irqstats20:32:490
2267499351cyclictest9481-21uptime20:23:011
2267499351cyclictest303632sleep119:37:501
2267499351cyclictest11856-21sed20:32:571
121650350irq/29-eth0_g0_3986-21grep20:02:490
121650350irq/29-eth0_g0_2758-21df_abs19:57:490
121650350irq/29-eth0_g0_1964-21runrttasks20:25:510
121650350irq/29-eth0_g0_17728-21ntp_kernel_err20:57:540
121650350irq/29-eth0_g0_16448-21cat20:52:540
121350ksoftirqd/1121650irq/29-eth0_g0_19:32:511
2267499341cyclictest4120-21cat20:02:511
121750340irq/30-eth0_g0_24302-21missed_timers19:12:541
121650340irq/29-eth0_g0_6709-21ntp_states20:12:560
121650340irq/29-eth0_g0_5717-21unixbench_multi20:07:590
121650340irq/29-eth0_g0_30520-21awk19:37:540
121650340irq/29-eth0_g0_0-21swapper/020:22:370
2267499331cyclictest316822sleep119:42:541
121650330irq/29-eth0_g0_15029-21df_abs20:47:490
121650330irq/29-eth0_g0_14040-21netstat20:42:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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