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2026-09-21 - 16:36

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 Mon Sep 21, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3061821480sleep1121650irq/29-eth0_g0_11:26:151
121880ksoftirqd/1121650irq/29-eth0_g0_10:35:230
121800ksoftirqd/1121750irq/30-eth0_g0_07:51:001
67232780sleep1121750irq/30-eth0_g0_07:35:321
67232780sleep1121750irq/30-eth0_g0_07:35:321
62242770sleep1121750irq/30-eth0_g0_12:00:271
173082730sleep1121650irq/29-eth0_g0_10:32:581
121570ksoftirqd/1121650irq/29-eth0_g0_09:30:311
121550ksoftirqd/1121650irq/29-eth0_g0_10:06:300
69602530sleep0121750irq/30-eth0_g0_12:03:400
121510ksoftirqd/1121750irq/30-eth0_g0_11:36:551
121500ksoftirqd/1121650irq/29-eth0_g0_11:27:200
121490ksoftirqd/1121650irq/29-eth0_g0_10:27:460
121470ksoftirqd/1121750irq/30-eth0_g0_09:40:471
121750460irq/30-eth0_g0_31ksoftirqd/010:00:310
121650460irq/29-eth0_g0_121ksoftirqd/111:47:361
121650450irq/29-eth0_g0_31ksoftirqd/011:00:310
121450ksoftirqd/1121750irq/30-eth0_g0_10:39:351
121450ksoftirqd/1121750irq/30-eth0_g0_09:23:571
116272450sleep0121650irq/29-eth0_g0_12:21:040
124122440sleep0121650irq/29-eth0_g0_10:12:510
121440ksoftirqd/1121750irq/30-eth0_g0_10:03:201
121750430irq/30-eth0_g0_42782sleep111:50:501
121750430irq/30-eth0_g0_1219-21kworker/1:209:58:521
121750430irq/30-eth0_g0_121ksoftirqd/112:15:251
121650430irq/29-eth0_g0_31ksoftirqd/011:31:090
121650430irq/29-eth0_g0_13-21kworker/0:111:06:230
121430ksoftirqd/1121750irq/30-eth0_g0_09:45:351
121430ksoftirqd/1121750irq/30-eth0_g0_09:45:351
121750420irq/30-eth0_g0_1219-21kworker/1:212:23:561
121750420irq/30-eth0_g0_1219-21kworker/1:211:03:341
121750420irq/30-eth0_g0_1219-21kworker/1:210:22:391
121750420irq/30-eth0_g0_121ksoftirqd/110:59:211
121750420irq/30-eth0_g0_121ksoftirqd/110:08:121
121650420irq/29-eth0_g0_31ksoftirqd/009:44:370
121650420irq/29-eth0_g0_18659-21seq08:25:280
121650420irq/29-eth0_g0_13297-21/usr/sbin/munin10:15:340
121650420irq/29-eth0_g0_131kworker/0:109:26:170
121650420irq/29-eth0_g0_121ksoftirqd/111:58:490
121420ksoftirqd/1121650irq/29-eth0_g0_09:36:281
3115299411cyclictest4158-21wc07:25:301
3115299411cyclictest4158-21wc07:25:301
253152410chrt25316-21ntp_offset11:05:301
121750410irq/30-eth0_g0_273632sleep111:15:141
121750410irq/30-eth0_g0_0-21swapper/111:55:321
121650410irq/29-eth0_g0_31ksoftirqd/011:40:110
121650410irq/29-eth0_g0_13-21kworker/0:111:52:270
121650410irq/29-eth0_g0_13-21kworker/0:111:40:290
121650410irq/29-eth0_g0_13-21kworker/0:111:10:160
121650410irq/29-eth0_g0_13-21kworker/0:110:44:220
121650410irq/29-eth0_g0_121ksoftirqd/111:16:010
121650410irq/29-eth0_g0_121ksoftirqd/110:33:350
121410ksoftirqd/1121750irq/30-eth0_g0_09:54:100
121410ksoftirqd/1121650irq/29-eth0_g0_10:50:231
121750400irq/30-eth0_g0_9269-21grep07:45:321
121750400irq/30-eth0_g0_1219-21kworker/1:211:41:151
121750400irq/30-eth0_g0_1219-21kworker/1:211:10:591
121750400irq/30-eth0_g0_121ksoftirqd/109:06:331
121650400irq/29-eth0_g0_31ksoftirqd/009:20:120
121650400irq/29-eth0_g0_31ksoftirqd/007:05:280
121650400irq/29-eth0_g0_1964-21runrttasks07:03:420
121650400irq/29-eth0_g0_1964-21runrttasks07:03:420
121650400irq/29-eth0_g0_14920-21latency08:10:250
121650400irq/29-eth0_g0_13-21kworker/0:112:26:160
121650400irq/29-eth0_g0_13-21kworker/0:112:18:070
121650400irq/29-eth0_g0_13-21kworker/0:110:56:460
121650400irq/29-eth0_g0_13-21kworker/0:110:20:140
121650400irq/29-eth0_g0_13-21kworker/0:109:13:140
121650400irq/29-eth0_g0_0-21swapper/009:49:090
121650400irq/29-eth0_g0_0-21swapper/009:49:090
3115299391cyclictest67532sleep109:50:221
3115299391cyclictest30876-21awk09:15:291
121750390irq/30-eth0_g0_1219-21kworker/1:212:14:011
121750390irq/30-eth0_g0_121ksoftirqd/112:32:541
121650390irq/29-eth0_g0_31ksoftirqd/012:34:530
121650390irq/29-eth0_g0_14292sleep109:27:501
121650390irq/29-eth0_g0_13-21kworker/0:109:35:300
121650390irq/29-eth0_g0_13-21kworker/0:109:34:300
121650390irq/29-eth0_g0_13-21kworker/0:109:07:500
121650390irq/29-eth0_g0_0-21swapper/008:15:230
121390ksoftirqd/1121650irq/29-eth0_g0_08:04:171
121390ksoftirqd/1121650irq/29-eth0_g0_07:43:591
31152993825cyclictest1964-21runrttasks08:54:221
3115299381cyclictest15200-21rt-features08:10:311
121750380irq/30-eth0_g0_1964-21runrttasks07:00:231
121750380irq/30-eth0_g0_1964-21runrttasks07:00:231
121750380irq/30-eth0_g0_15786-21unixbench_multi10:25:331
121750380irq/30-eth0_g0_1219-21kworker/1:211:30:151
121750380irq/30-eth0_g0_121ksoftirqd/110:41:031
121750380irq/30-eth0_g0_121ksoftirqd/110:10:131
121750380irq/30-eth0_g0_0-21swapper/110:17:181
121650380irq/29-eth0_g0_8225-21chrt12:09:090
121650380irq/29-eth0_g0_31ksoftirqd/008:05:310
121650380irq/29-eth0_g0_31ksoftirqd/008:05:310
121650380irq/29-eth0_g0_2758-21/usr/sbin/munin07:20:260
121650380irq/29-eth0_g0_23565-21/usr/sbin/munin08:45:280
121650380irq/29-eth0_g0_13-21kworker/0:111:48:040
121650380irq/29-eth0_g0_13-21kworker/0:111:24:070
121650380irq/29-eth0_g0_13-21kworker/0:110:52:050
121650380irq/29-eth0_g0_13-21kworker/0:110:48:250
121650380irq/29-eth0_g0_1139-21runrttasks07:15:110
121380ksoftirqd/1121650irq/29-eth0_g0_11:20:151
121380ksoftirqd/1121650irq/29-eth0_g0_08:43:031
121380ksoftirqd/1121650irq/29-eth0_g0_08:31:311
121380ksoftirqd/1121650irq/29-eth0_g0_08:23:081
121380ksoftirqd/1121650irq/29-eth0_g0_08:23:081
3115299372cyclictest31475-21iostat07:05:261
3115299371cyclictest12146-21df_abs12:25:211
121650370irq/29-eth0_g0_8486-21unixbench_multi09:55:330
121650370irq/29-eth0_g0_7820-21proc_pri07:40:310
121650370irq/29-eth0_g0_32002-21memory09:20:250
121650370irq/29-eth0_g0_31ksoftirqd/007:20:110
121650370irq/29-eth0_g0_21082-21ls08:35:280
121650370irq/29-eth0_g0_1964-21runrttasks08:22:410
121650370irq/29-eth0_g0_1964-21runrttasks08:22:410
121650370irq/29-eth0_g0_13-21kworker/0:112:11:230
3115299362cyclictest26759-21cat09:00:111
3115299362cyclictest1964-21runrttasks09:05:051
3115299361cyclictest29924-21grep09:10:341
3115299361cyclictest2866-21grep07:20:291
3115299361cyclictest20819-21seq08:35:241
3115299361cyclictest20244-21seq10:45:251
121750360irq/30-eth0_g0_121ksoftirqd/107:10:321
121650360irq/29-eth0_g0_4230-21sendmail_mailqu07:25:310
121650360irq/29-eth0_g0_4230-21sendmail_mailqu07:25:310
121650360irq/29-eth0_g0_26071-21ps08:55:280
121650360irq/29-eth0_g0_1964-21runrttasks07:31:120
121650360irq/29-eth0_g0_121ksoftirqd/112:06:161
121650360irq/29-eth0_g0_10400-21sort07:50:350
121650360irq/29-eth0_g0_0-21swapper/009:00:340
121650360irq/29-eth0_g0_0-21swapper/007:35:330
121650360irq/29-eth0_g0_0-21swapper/007:35:330
3115299351cyclictest16111-21runrttasks08:15:231
121750350irq/30-eth0_g0_5456-21sendmail_mailqu07:30:301
121750350irq/30-eth0_g0_2109-21lldpd07:15:351
121650350irq/29-eth0_g0_24559-21entropy08:50:230
121650350irq/29-eth0_g0_22221-21latency08:40:260
121650350irq/29-eth0_g0_19838-21missed_timers08:30:280
121650350irq/29-eth0_g0_1964-21runrttasks08:46:121
121650350irq/29-eth0_g0_12887-21grep08:00:350
3115299341cyclictest13796-21netstat08:05:271
3115299341cyclictest13796-21netstat08:05:271
121650340irq/29-eth0_g0_9252-21unixbench_singl07:45:320
121650340irq/29-eth0_g0_0-21swapper/007:55:280
3115299331cyclictest11581-21chrt07:55:311
121750320irq/30-eth0_g0_18379-21df08:25:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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