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2026-08-30 - 22:38

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 376 highest latencies:
System rack3slot5s.osadl.org (updated Sun Aug 30, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
585021220sleep1121650irq/29-eth0_g0_10:17:221
1211090ksoftirqd/1121750irq/30-eth0_g0_07:16:031
121980ksoftirqd/1121750irq/30-eth0_g0_07:36:201
121880ksoftirqd/1121750irq/30-eth0_g0_12:18:351
121880ksoftirqd/1121750irq/30-eth0_g0_12:18:351
292922730sleep1121750irq/30-eth0_g0_11:54:211
121730ksoftirqd/1121750irq/30-eth0_g0_09:53:231
121720ksoftirqd/1121750irq/30-eth0_g0_08:42:261
121650ksoftirqd/1121650irq/29-eth0_g0_09:34:011
121650ksoftirqd/1121650irq/29-eth0_g0_09:34:011
34132600sleep1121650irq/29-eth0_g0_10:07:311
34132600sleep1121650irq/29-eth0_g0_10:07:311
121500ksoftirqd/1121750irq/30-eth0_g0_10:01:220
121490ksoftirqd/1121750irq/30-eth0_g0_10:42:481
121490ksoftirqd/1121750irq/30-eth0_g0_08:13:481
121490ksoftirqd/1121750irq/30-eth0_g0_08:13:481
3452480chrt121650irq/29-eth0_g0_12:07:310
121470ksoftirqd/1121750irq/30-eth0_g0_11:38:361
121470ksoftirqd/1121750irq/30-eth0_g0_11:28:051
121470ksoftirqd/1121750irq/30-eth0_g0_10:51:001
121650450irq/29-eth0_g0_23207-21cyclictest07:06:020
121450ksoftirqd/1121750irq/30-eth0_g0_09:57:341
121450ksoftirqd/1121750irq/30-eth0_g0_09:11:330
121450ksoftirqd/1121650irq/29-eth0_g0_08:56:231
132712440sleep0121750irq/30-eth0_g0_10:48:130
121750440irq/30-eth0_g0_1607-21runrttasks12:12:341
121650440irq/29-eth0_g0_1964-21runrttasks10:14:000
121440ksoftirqd/122129-21chrt07:01:141
121440ksoftirqd/1121650irq/29-eth0_g0_11:21:570
121440ksoftirqd/1121650irq/29-eth0_g0_09:02:351
121430ksoftirqd/1121650irq/29-eth0_g0_11:50:331
121430ksoftirqd/1121650irq/29-eth0_g0_10:59:381
121430ksoftirqd/1121650irq/29-eth0_g0_10:40:260
121750420irq/30-eth0_g0_1219-21kworker/1:210:15:281
121650420irq/29-eth0_g0_31ksoftirqd/011:09:370
121420ksoftirqd/1121650irq/29-eth0_g0_11:32:170
2320999411cyclictest0-21swapper/110:01:121
121750410irq/30-eth0_g0_0-21swapper/108:46:191
121650410irq/29-eth0_g0_1964-21runrttasks09:29:460
121650410irq/29-eth0_g0_1219-21kworker/1:211:04:391
121410ksoftirqd/1121650irq/29-eth0_g0_09:11:511
117342410sleep0121650irq/29-eth0_g0_10:41:220
2320999403cyclictest28269-21unixbench_multi09:36:251
2320999401cyclictest1345-21unixbench_singl07:46:221
121750400irq/30-eth0_g0_20287-21/usr/sbin/munin09:06:141
121750400irq/30-eth0_g0_1219-21kworker/1:210:35:491
121750400irq/30-eth0_g0_1219-21kworker/1:210:23:221
121650400irq/29-eth0_g0_31ksoftirqd/009:51:310
121650400irq/29-eth0_g0_13-21kworker/0:112:26:190
121650400irq/29-eth0_g0_13-21kworker/0:112:24:430
121400ksoftirqd/1121750irq/30-eth0_g0_10:09:340
121400ksoftirqd/1121750irq/30-eth0_g0_10:09:340
121400ksoftirqd/1121650irq/29-eth0_g0_12:03:560
121400ksoftirqd/1121650irq/29-eth0_g0_10:53:231
241512390sleep1121650irq/29-eth0_g0_11:31:331
2320999392cyclictest16977-21netstat08:51:181
2320999391cyclictest303352sleep109:46:161
2320999391cyclictest26291-21sendmail_mailqu07:16:211
2320999391cyclictest20193-21diskmemload11:11:201
121750390irq/30-eth0_g0_31ksoftirqd/011:59:290
121750390irq/30-eth0_g0_121ksoftirqd/109:18:411
121650390irq/29-eth0_g0_218872sleep111:23:461
121650390irq/29-eth0_g0_15564-21if_err_eth008:46:150
121650390irq/29-eth0_g0_13-21kworker/0:112:35:500
121650390irq/29-eth0_g0_13-21kworker/0:111:50:200
121650390irq/29-eth0_g0_13-21kworker/0:111:01:320
121650390irq/29-eth0_g0_13-21kworker/0:110:58:460
121650390irq/29-eth0_g0_13-21kworker/0:110:26:420
121650390irq/29-eth0_g0_13-21kworker/0:109:09:420
121650390irq/29-eth0_g0_121ksoftirqd/111:37:100
121390ksoftirqd/1121750irq/30-eth0_g0_09:44:360
121390ksoftirqd/1121750irq/30-eth0_g0_08:11:260
121390ksoftirqd/1121750irq/30-eth0_g0_08:11:260
121390ksoftirqd/1121750irq/30-eth0_g0_07:54:340
121390ksoftirqd/1121750irq/30-eth0_g0_07:07:560
121390ksoftirqd/1121650irq/29-eth0_g0_12:31:231
121390ksoftirqd/1121650irq/29-eth0_g0_09:29:221
267002380sleep0121650irq/29-eth0_g0_11:42:380
2320999382cyclictest1964-21runrttasks07:41:131
121750380irq/30-eth0_g0_18124-21runrttasks11:07:441
121750380irq/30-eth0_g0_121ksoftirqd/112:22:351
121750380irq/30-eth0_g0_0-21swapper/111:59:451
121750380irq/30-eth0_g0_0-21swapper/111:17:561
121650380irq/29-eth0_g0_31ksoftirqd/011:13:440
121650380irq/29-eth0_g0_13-21kworker/0:112:16:320
121650380irq/29-eth0_g0_13-21kworker/0:112:16:320
121650380irq/29-eth0_g0_13-21kworker/0:111:52:060
121650380irq/29-eth0_g0_13-21kworker/0:110:51:570
121650380irq/29-eth0_g0_13-21kworker/0:110:33:440
121650380irq/29-eth0_g0_13-21kworker/0:109:37:330
121650380irq/29-eth0_g0_13-21kworker/0:109:20:190
121650380irq/29-eth0_g0_11125-21grep08:26:240
121380ksoftirqd/1121750irq/30-eth0_g0_12:12:110
121380ksoftirqd/1121750irq/30-eth0_g0_11:26:370
121380ksoftirqd/1121750irq/30-eth0_g0_10:21:310
121380ksoftirqd/1121750irq/30-eth0_g0_08:23:130
121380ksoftirqd/1121750irq/30-eth0_g0_07:23:360
121380ksoftirqd/1121650irq/29-eth0_g0_08:19:161
2320999372cyclictest1964-21runrttasks07:52:411
2320999371cyclictest12345-21grep08:31:231
2320999370cyclictest0-21swapper/110:36:031
121750370irq/30-eth0_g0_26447-21cpu09:31:120
121750370irq/30-eth0_g0_26447-21cpu09:31:120
121750370irq/30-eth0_g0_2320899cyclictest08:01:220
121750370irq/30-eth0_g0_1219-21kworker/1:212:06:191
121750370irq/30-eth0_g0_1219-21kworker/1:210:28:131
121750370irq/30-eth0_g0_1219-21kworker/1:209:21:461
121650370irq/29-eth0_g0_29889-21proc_pri07:31:210
121650370irq/29-eth0_g0_13-21kworker/0:111:18:430
121650370irq/29-eth0_g0_13-21kworker/0:110:20:370
121650370irq/29-eth0_g0_13-21kworker/0:109:58:100
121650370irq/29-eth0_g0_13-21kworker/0:109:24:270
121650370irq/29-eth0_g0_0-21swapper/007:26:190
121370ksoftirqd/1121750irq/30-eth0_g0_09:02:000
121370ksoftirqd/1121650irq/29-eth0_g0_12:26:211
2320999362cyclictest4265-21munin-run08:01:021
2320999361cyclictest23992-21grep07:06:251
2320999361cyclictest0-21swapper/111:43:541
2320999361cyclictest0-21swapper/107:30:201
2320999360cyclictest0-21swapper/108:28:141
121750360irq/30-eth0_g0_0-21swapper/109:43:071
121650360irq/29-eth0_g0_1964-21runrttasks08:51:210
121650360irq/29-eth0_g0_18219-21ntpdc08:56:190
121650360irq/29-eth0_g0_13-21kworker/0:109:46:180
121360ksoftirqd/1121650irq/29-eth0_g0_07:31:141
2320999352cyclictest1964-21runrttasks07:23:571
2320999351cyclictest6235-21sed08:06:241
2320999351cyclictest30819-21taskset12:01:131
2320999351cyclictest13559-21unixbench_multi08:36:251
121650350irq/29-eth0_g0_1964-21runrttasks08:39:340
121650350irq/29-eth0_g0_14403-21ls08:41:160
2320999341cyclictest4362-21egrep08:01:131
2320999341cyclictest0-21swapper/108:25:001
121650340irq/29-eth0_g0_31293-21unixbench_multi07:36:240
121650340irq/29-eth0_g0_26383-21sed07:16:230
121650340irq/29-eth0_g0_25197-21unixbench_singl07:11:240
121650340irq/29-eth0_g0_12324-21/usr/sbin/munin08:31:230
121650330irq/29-eth0_g0_694-21runrttasks07:46:110
121650330irq/29-eth0_g0_3782-21unixbench_multi07:56:240
121650330irq/29-eth0_g0_0-21swapper/007:41:230
121650320irq/29-eth0_g0_8095-21df_abs08:16:130
121650320irq/29-eth0_g0_0-21swapper/008:06:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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