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2026-09-10 - 16:37

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 the highest latencies:
System rack3slot5s.osadl.org (updated Thu Sep 10, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3120021590sleep1121650irq/29-eth0_g0_10:59:151
42122770sleep1121750irq/30-eth0_g0_11:20:501
140032730sleep0121650irq/29-eth0_g0_09:48:560
121680ksoftirqd/1121750irq/30-eth0_g0_11:24:400
206202610sleep0121750irq/30-eth0_g0_12:26:350
322862600sleep0121650irq/29-eth0_g0_11:02:370
121590ksoftirqd/1121750irq/30-eth0_g0_09:15:170
162972570sleep1121750irq/30-eth0_g0_07:45:511
187422530sleep0121650irq/29-eth0_g0_12:20:480
121520ksoftirqd/1121750irq/30-eth0_g0_12:28:481
121510ksoftirqd/1121750irq/30-eth0_g0_11:52:541
121470ksoftirqd/1121650irq/29-eth0_g0_08:52:591
188342460sleep1121750irq/30-eth0_g0_10:08:051
121460ksoftirqd/1121750irq/30-eth0_g0_10:34:261
121450ksoftirqd/1121750irq/30-eth0_g0_11:18:201
121450ksoftirqd/1121750irq/30-eth0_g0_11:01:451
121650440irq/29-eth0_g0_31ksoftirqd/009:00:570
121650440irq/29-eth0_g0_2109-21lldpd10:56:090
121440ksoftirqd/1121750irq/30-eth0_g0_11:43:210
121750430irq/30-eth0_g0_31ksoftirqd/007:00:530
121750430irq/30-eth0_g0_1219-21kworker/1:212:06:041
121650430irq/29-eth0_g0_121ksoftirqd/110:06:510
121430ksoftirqd/1121750irq/30-eth0_g0_08:55:571
121430ksoftirqd/1121650irq/29-eth0_g0_10:10:471
610799421cyclictest4433-21taskset09:10:471
610799421cyclictest17875-21unixbench_multi07:50:571
121750420irq/30-eth0_g0_1219-21kworker/1:212:13:341
121750420irq/30-eth0_g0_1219-21kworker/1:210:02:321
121750420irq/30-eth0_g0_121ksoftirqd/112:33:221
121750420irq/30-eth0_g0_121ksoftirqd/110:51:411
121650420irq/29-eth0_g0_31ksoftirqd/012:14:430
121650420irq/29-eth0_g0_20702-21missed_timers10:15:510
121420ksoftirqd/1121650irq/29-eth0_g0_09:09:231
610799411cyclictest8052-21sed07:10:561
238392410sleep0121650irq/29-eth0_g0_10:29:160
121750410irq/30-eth0_g0_1219-21kworker/1:209:45:501
121750410irq/30-eth0_g0_1219-21kworker/1:209:38:081
121750410irq/30-eth0_g0_1219-21kworker/1:209:20:071
121750410irq/30-eth0_g0_121ksoftirqd/111:47:571
121750410irq/30-eth0_g0_0-21swapper/111:08:181
121650410irq/29-eth0_g0_7584-21cpu11:35:460
121650410irq/29-eth0_g0_31ksoftirqd/012:32:120
121650410irq/29-eth0_g0_31ksoftirqd/007:25:530
121650410irq/29-eth0_g0_13-21kworker/0:111:46:190
121650410irq/29-eth0_g0_13-21kworker/0:109:53:560
121650410irq/29-eth0_g0_13-21kworker/0:109:44:230
121650410irq/29-eth0_g0_121ksoftirqd/109:43:151
121410ksoftirqd/1318512sleep008:50:360
121410ksoftirqd/1121750irq/30-eth0_g0_09:08:240
121410ksoftirqd/1121650irq/29-eth0_g0_10:44:251
610799401cyclictest28175-21latency_hist08:35:371
610799401cyclictest23479-21grep10:25:571
121750400irq/30-eth0_g0_6103-21latencyplot07:05:361
121750400irq/30-eth0_g0_1219-21kworker/1:211:34:301
121750400irq/30-eth0_g0_1219-21kworker/1:209:27:371
121750400irq/30-eth0_g0_121ksoftirqd/111:59:001
121650400irq/29-eth0_g0_6327-21df07:05:480
121650400irq/29-eth0_g0_31ksoftirqd/010:41:390
121650400irq/29-eth0_g0_17621-21ntpq07:50:520
121650400irq/29-eth0_g0_13-21kworker/0:111:56:420
121650400irq/29-eth0_g0_13-21kworker/0:111:51:510
121650400irq/29-eth0_g0_13-21kworker/0:111:34:190
121650400irq/29-eth0_g0_13-21kworker/0:111:27:340
121650400irq/29-eth0_g0_13-21kworker/0:110:46:570
121650400irq/29-eth0_g0_13-21kworker/0:109:32:460
121650400irq/29-eth0_g0_13-21kworker/0:109:17:350
121650400irq/29-eth0_g0_1018-21missed_timers08:55:520
121400ksoftirqd/1121650irq/29-eth0_g0_12:22:181
121400ksoftirqd/1121650irq/29-eth0_g0_11:28:031
121400ksoftirqd/1121650irq/29-eth0_g0_10:35:491
610799391cyclictest21563-21grep08:05:571
121750390irq/30-eth0_g0_1219-21kworker/1:211:45:191
121750390irq/30-eth0_g0_1219-21kworker/1:210:18:261
121750390irq/30-eth0_g0_1219-21kworker/1:209:56:191
121750390irq/30-eth0_g0_121ksoftirqd/109:21:491
121750390irq/30-eth0_g0_0-21swapper/111:38:361
121650390irq/29-eth0_g0_31ksoftirqd/009:55:570
121650390irq/29-eth0_g0_31ksoftirqd/009:25:530
121650390irq/29-eth0_g0_13-21kworker/0:110:54:320
121650390irq/29-eth0_g0_13-21kworker/0:110:31:490
121650390irq/29-eth0_g0_13-21kworker/0:110:22:490
121650390irq/29-eth0_g0_13-21kworker/0:109:24:310
121650390irq/29-eth0_g0_121ksoftirqd/110:10:460
121650390irq/29-eth0_g0_0-21swapper/012:05:500
121390ksoftirqd/1121650irq/29-eth0_g0_09:50:471
121390ksoftirqd/1121650irq/29-eth0_g0_08:29:301
113192390sleep0121750irq/30-eth0_g0_09:36:120
10622390sleep0121750irq/30-eth0_g0_11:07:410
610799381cyclictest2067-21grep11:10:581
610799381cyclictest14694-21cat07:40:361
121750380irq/30-eth0_g0_1219-21kworker/1:209:30:591
121650380irq/29-eth0_g0_3349-21unixbench_singl11:15:570
121650380irq/29-eth0_g0_2633-21latency_hist11:15:370
121650380irq/29-eth0_g0_13-21kworker/0:112:03:100
121650380irq/29-eth0_g0_13-21kworker/0:110:37:450
121380ksoftirqd/1121650irq/29-eth0_g0_10:21:241
121380ksoftirqd/1121650irq/29-eth0_g0_09:04:421
121380ksoftirqd/1121650irq/29-eth0_g0_08:25:131
610799371cyclictest30659-21cat08:45:361
610799371cyclictest23484-21chrt08:15:471
610799371cyclictest22673-21chrt08:10:551
121650370irq/29-eth0_g0_20306-21sed08:00:580
121650370irq/29-eth0_g0_14210-21grep07:35:570
121650370irq/29-eth0_g0_13-21kworker/0:112:16:160
121650370irq/29-eth0_g0_13-21kworker/0:110:01:460
121650370irq/29-eth0_g0_0-21swapper/008:50:510
610799362cyclictest18069-21unixbench_singl12:15:571
610799361cyclictest6885-21sed07:05:591
610799361cyclictest18453-21/usr/sbin/munin07:55:591
121650360irq/29-eth0_g0_7556-21df_abs07:10:480
121650360irq/29-eth0_g0_26474-21tail08:25:560
121650360irq/29-eth0_g0_17195-21latency_hist07:50:370
121650360irq/29-eth0_g0_13495-21taskset07:35:370
121650360irq/29-eth0_g0_1219-21kworker/1:210:46:301
121360ksoftirqd/1121750irq/30-eth0_g0_08:12:360
121360ksoftirqd/1121750irq/30-eth0_g0_07:24:360
121360ksoftirqd/1121650irq/29-eth0_g0_12:00:481
610799351cyclictest9343-21unixbench_singl07:15:581
610799351cyclictest1964-21runrttasks07:44:031
610799351cyclictest0-21swapper/108:05:011
121650350irq/29-eth0_g0_9187-21wc07:15:560
121650350irq/29-eth0_g0_28967-21grep08:36:000
121650350irq/29-eth0_g0_28967-21grep08:36:000
121650350irq/29-eth0_g0_27040-21/usr/sbin/munin08:30:460
121650350irq/29-eth0_g0_25722-21munin-run08:25:360
121650350irq/29-eth0_g0_18699-21latency07:55:510
610799341cyclictest12467-21chrt07:30:471
610799341cyclictest11836-21vmstat07:25:581
235462340sleep00-21swapper/008:15:480
121750340irq/30-eth0_g0_9948-21df_abs07:20:461
121750340irq/30-eth0_g0_28402-21df_abs08:35:491
121750340irq/30-eth0_g0_28402-21df_abs08:35:491
121650340irq/29-eth0_g0_29589-21runrttasks08:40:470
121650340irq/29-eth0_g0_15487-21unixbench_singl07:40:590
121650340irq/29-eth0_g0_0-21swapper/008:05:510
610799321cyclictest30777-21seq08:45:481
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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