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2026-04-08 - 00:14

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 Tue Apr 07, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1977821300chrt3129750irq/30-eth0_g0_11:59:561
1211160ksoftirqd/13129750irq/30-eth0_g0_09:47:581
121940ksoftirqd/13129750irq/30-eth0_g0_09:37:241
121920ksoftirqd/13129750irq/30-eth0_g0_11:09:451
121870ksoftirqd/13129750irq/30-eth0_g0_12:12:461
121850ksoftirqd/13129650irq/29-eth0_g0_11:21:401
147692800sleep13129750irq/30-eth0_g0_11:39:511
121740ksoftirqd/13129750irq/30-eth0_g0_10:14:441
121730ksoftirqd/13129750irq/30-eth0_g0_09:51:071
69162660sleep13129750irq/30-eth0_g0_08:55:061
89602560sleep13129750irq/30-eth0_g0_11:17:251
188532550sleep03129650irq/29-eth0_g0_11:58:260
304362540chrt3129650irq/29-eth0_g0_08:19:480
228682540sleep03129750irq/30-eth0_g0_10:00:360
16872490sleep13129750irq/30-eth0_g0_10:48:241
121490ksoftirqd/13129750irq/30-eth0_g0_11:50:391
121480ksoftirqd/13129750irq/30-eth0_g0_10:28:341
121470ksoftirqd/13129750irq/30-eth0_g0_12:27:371
121470ksoftirqd/13129750irq/30-eth0_g0_09:22:111
3129650460irq/29-eth0_g0_7016-21iostat11:09:420
121460ksoftirqd/13129750irq/30-eth0_g0_12:31:181
121460ksoftirqd/13129750irq/30-eth0_g0_11:27:141
121460ksoftirqd/13129750irq/30-eth0_g0_11:03:121
90272450sleep03129750irq/30-eth0_g0_11:18:110
121450ksoftirqd/13129750irq/30-eth0_g0_10:13:491
3129750440irq/30-eth0_g0_121ksoftirqd/110:01:021
3129650440irq/29-eth0_g0_26767-21ntpdc12:29:450
121440ksoftirqd/13129650irq/29-eth0_g0_11:58:451
121440ksoftirqd/13129650irq/29-eth0_g0_10:43:411
121440ksoftirqd/13129650irq/29-eth0_g0_09:24:451
3129650430irq/29-eth0_g0_31ksoftirqd/007:04:390
3129650430irq/29-eth0_g0_1875-21runrttasks11:05:480
3129750420irq/30-eth0_g0_31295-21kworker/1:109:13:251
3129650420irq/29-eth0_g0_31ksoftirqd/012:17:210
3129650420irq/29-eth0_g0_31ksoftirqd/011:20:210
3129650420irq/29-eth0_g0_20861-21unixbench_multi07:39:510
1280399422cyclictest4283-21/usr/sbin/munin08:44:511
121420ksoftirqd/13129750irq/30-eth0_g0_09:57:471
3129750410irq/30-eth0_g0_31295-21kworker/1:110:38:171
3129650410irq/29-eth0_g0_31ksoftirqd/012:04:390
3129650410irq/29-eth0_g0_31ksoftirqd/011:29:420
3129650410irq/29-eth0_g0_1875-21runrttasks10:55:390
3129650410irq/29-eth0_g0_121ksoftirqd/111:47:180
121410ksoftirqd/111719-21df_abs07:04:401
3129750400irq/30-eth0_g0_31295-21kworker/1:109:30:101
3129650400irq/29-eth0_g0_31ksoftirqd/009:11:100
3129650400irq/29-eth0_g0_16754-21/usr/sbin/munin11:49:410
3129650400irq/29-eth0_g0_13-21kworker/0:112:29:060
3129650400irq/29-eth0_g0_13-21kworker/0:112:13:100
3129650400irq/29-eth0_g0_13-21kworker/0:110:53:130
3129650400irq/29-eth0_g0_13-21kworker/0:110:41:540
3129650400irq/29-eth0_g0_13-21kworker/0:109:48:420
1280399402cyclictest2951-21wc08:39:471
121400ksoftirqd/13129750irq/30-eth0_g0_09:17:430
121400ksoftirqd/13129650irq/29-eth0_g0_10:04:481
3129750390irq/30-eth0_g0_31295-21kworker/1:111:05:431
3129650390irq/29-eth0_g0_31ksoftirqd/010:14:010
3129650390irq/29-eth0_g0_31ksoftirqd/009:49:420
3129650390irq/29-eth0_g0_13896-21ntpdc09:24:470
3129650390irq/29-eth0_g0_13-21kworker/0:112:20:030
3129650390irq/29-eth0_g0_13-21kworker/0:111:38:580
3129650390irq/29-eth0_g0_13-21kworker/0:111:02:000
3129650390irq/29-eth0_g0_13-21kworker/0:110:04:410
3129650390irq/29-eth0_g0_13-21kworker/0:109:38:330
3129650390irq/29-eth0_g0_13-21kworker/0:109:29:390
3129650390irq/29-eth0_g0_121ksoftirqd/110:36:190
3129650390irq/29-eth0_g0_10927-21wc11:24:480
1280399391cyclictest5594-21grep08:49:501
121390ksoftirqd/13129750irq/30-eth0_g0_10:33:190
121390ksoftirqd/13129750irq/30-eth0_g0_08:49:490
121390ksoftirqd/13129650irq/29-eth0_g0_09:55:140
121390ksoftirqd/13129650irq/29-eth0_g0_09:43:140
3129650380irq/29-eth0_g0_14651-21fgrep07:14:490
3129650380irq/29-eth0_g0_13-21kworker/0:111:59:480
3129650380irq/29-eth0_g0_13-21kworker/0:110:21:070
3129650380irq/29-eth0_g0_13-21kworker/0:110:21:070
3129650380irq/29-eth0_g0_13-21kworker/0:110:16:120
3129650380irq/29-eth0_g0_13-21kworker/0:109:21:330
1280399382cyclictest9737-21munin-run09:09:281
1280399382cyclictest13493-21wc07:09:491
1280399381cyclictest3717-21chrt10:54:511
121380ksoftirqd/13129650irq/29-eth0_g0_09:15:291
3129650370irq/29-eth0_g0_9283-21unixbench_singl09:04:480
3129650370irq/29-eth0_g0_27788-21interrupts08:09:430
3129650370irq/29-eth0_g0_19590-21timerandwakeup07:34:490
3129650370irq/29-eth0_g0_1875-21runrttasks12:35:010
3129650370irq/29-eth0_g0_1875-21runrttasks08:59:420
3129650370irq/29-eth0_g0_1875-21runrttasks08:45:200
3129650370irq/29-eth0_g0_16045-21sed07:19:510
3129650370irq/29-eth0_g0_13-21kworker/0:110:26:460
3129650370irq/29-eth0_g0_121ksoftirqd/109:41:101
1280399372cyclictest223242sleep107:46:281
1280399372cyclictest19255-21cat07:34:421
1280399372cyclictest13617-21grep11:34:491
1280399371cyclictest7844-21grep08:59:471
1280399371cyclictest295652sleep110:29:401
1280399371cyclictest12066-21ntpdc11:29:451
121370ksoftirqd/13129650irq/29-eth0_g0_12:14:451
121370ksoftirqd/13129650irq/29-eth0_g0_08:04:521
3129750360irq/30-eth0_g0_31876-21unixbench_multi08:24:501
3129750360irq/30-eth0_g0_31295-21kworker/1:112:34:411
3129750360irq/30-eth0_g0_31295-21kworker/1:111:45:301
3129650360irq/29-eth0_g0_1875-21runrttasks08:55:250
3129650360irq/29-eth0_g0_1875-21runrttasks08:43:250
3129650360irq/29-eth0_g0_1875-21runrttasks08:38:480
3129650360irq/29-eth0_g0_1875-21runrttasks07:24:420
3129650360irq/29-eth0_g0_1875-21runrttasks07:10:180
3129650360irq/29-eth0_g0_13-21kworker/0:111:42:470
3129650360irq/29-eth0_g0_1280399cyclictest12:07:241
16122360sleep03129750irq/30-eth0_g0_10:47:310
1280399362cyclictest14271-21df_inode07:14:421
1280399361cyclictest29973-21taskset08:19:301
1280399361cyclictest24401-21wc12:19:481
1280399361cyclictest2424-21cat08:39:291
1280399361cyclictest16692-21df_abs07:24:411
3129750350irq/30-eth0_g0_31295-21kworker/1:110:51:261
3129650350irq/29-eth0_g0_25271-21df_inode07:59:420
3129650350irq/29-eth0_g0_23209-21fgrep07:49:480
3129650350irq/29-eth0_g0_23209-21fgrep07:49:480
3129650350irq/29-eth0_g0_1875-21runrttasks08:15:530
3129650350irq/29-eth0_g0_1875-21runrttasks07:59:270
3129650350irq/29-eth0_g0_1875-21runrttasks07:30:110
218222350sleep00-21swapper/007:44:460
1280399351cyclictest30084-21df08:19:411
1280399351cyclictest27624-21chrt08:09:401
1280399351cyclictest25510-21runrttasks07:59:471
1280399351cyclictest24128-21irqstats07:54:411
1280399351cyclictest20695-21wc07:39:481
1280399351cyclictest15913-21timerandwakeup07:19:501
1280399351cyclictest0-21swapper/110:19:461
1280399351cyclictest0-21swapper/110:19:461
3129650340irq/29-eth0_g0_31682-21/usr/sbin/munin08:24:470
3129650340irq/29-eth0_g0_1280299cyclictest08:04:480
1280399341cyclictest18183-21grep07:29:471
3129650330irq/29-eth0_g0_635-21grep08:29:500
1280399331cyclictest22675-21/usr/sbin/munin07:49:471
1280399331cyclictest22675-21/usr/sbin/munin07:49:471
1280399330cyclictest0-21swapper/108:33:381
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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