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2026-04-11 - 19:30

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 792 highest latencies:
System rack3slot5s.osadl.org (updated Sat Apr 11, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5052920sleep13129750irq/30-eth0_g0_09:10:501
100242910sleep03129650irq/29-eth0_g0_12:03:010
121850ksoftirqd/13129750irq/30-eth0_g0_08:44:370
165602720sleep13129750irq/30-eth0_g0_08:04:381
118292630sleep03129750irq/30-eth0_g0_07:44:410
289782610sleep03129650irq/29-eth0_g0_11:08:270
289782610sleep03129650irq/29-eth0_g0_11:08:270
117572560sleep13129750irq/30-eth0_g0_09:57:521
100252550sleep13129650irq/29-eth0_g0_12:03:021
121530ksoftirqd/13129750irq/30-eth0_g0_09:39:301
3129650490irq/29-eth0_g0_121ksoftirqd/111:49:431
3129650490irq/29-eth0_g0_121ksoftirqd/111:49:431
121490ksoftirqd/13129750irq/30-eth0_g0_12:13:581
121470ksoftirqd/13129750irq/30-eth0_g0_11:04:401
121470ksoftirqd/13129750irq/30-eth0_g0_11:04:401
32472450sleep03129750irq/30-eth0_g0_09:23:450
3129750450irq/30-eth0_g0_31295-21kworker/1:110:44:031
3129750450irq/30-eth0_g0_31295-21kworker/1:109:33:501
3129650450irq/29-eth0_g0_121ksoftirqd/110:38:091
121450ksoftirqd/13129750irq/30-eth0_g0_12:34:341
3129750440irq/30-eth0_g0_31295-21kworker/1:110:18:241
3129750440irq/30-eth0_g0_31295-21kworker/1:109:51:151
3129650440irq/29-eth0_g0_1953-21fgrep07:04:380
2573994432cyclictest1617-21unixbench_singl09:14:421
121440ksoftirqd/13129650irq/29-eth0_g0_08:20:111
3129750430irq/30-eth0_g0_31295-21kworker/1:112:22:441
3129750430irq/30-eth0_g0_31295-21kworker/1:111:42:141
3129750430irq/30-eth0_g0_31295-21kworker/1:110:24:021
3129750430irq/30-eth0_g0_31295-21kworker/1:110:12:271
2573994330cyclictest556-21/usr/sbin/munin11:24:331
2573994329cyclictest21441-21netstat08:24:341
121430ksoftirqd/13129750irq/30-eth0_g0_11:29:581
121430ksoftirqd/13129750irq/30-eth0_g0_09:34:050
3129750420irq/30-eth0_g0_31295-21kworker/1:112:29:261
3129750420irq/30-eth0_g0_31295-21kworker/1:111:54:501
3129750420irq/30-eth0_g0_31295-21kworker/1:110:57:401
3129750420irq/30-eth0_g0_31295-21kworker/1:110:47:341
3129750420irq/30-eth0_g0_31295-21kworker/1:109:38:531
3129650420irq/29-eth0_g0_4159-21latency07:14:350
3129650420irq/29-eth0_g0_147342sleep012:20:420
121420ksoftirqd/13129750irq/30-eth0_g0_10:56:310
3129750410irq/30-eth0_g0_31295-21kworker/1:111:46:591
3129750410irq/30-eth0_g0_121ksoftirqd/110:33:301
2573994129cyclictest12269-21memory09:59:351
2573994128cyclictest27457-21cat08:49:351
2573994127cyclictest11719-21ps07:44:391
121410ksoftirqd/13129650irq/29-eth0_g0_09:15:120
3129750400irq/30-eth0_g0_31295-21kworker/1:112:06:251
3129650400irq/29-eth0_g0_191192chrt10:27:550
3129650400irq/29-eth0_g0_13-21kworker/0:110:16:120
3129650400irq/29-eth0_g0_13-21kworker/0:109:36:360
3129650400irq/29-eth0_g0_0-21swapper/011:32:200
2573994028cyclictest3861-21/usr/sbin/munin09:24:391
3129750390irq/30-eth0_g0_31295-21kworker/1:111:20:551
3129750390irq/30-eth0_g0_31295-21kworker/1:111:09:321
3129750390irq/30-eth0_g0_31295-21kworker/1:110:53:051
3129750390irq/30-eth0_g0_31295-21kworker/1:110:08:221
3129750390irq/30-eth0_g0_31295-21kworker/1:110:08:221
3129750390irq/30-eth0_g0_121ksoftirqd/108:09:341
3129750390irq/30-eth0_g0_0-21swapper/112:25:191
3129750390irq/30-eth0_g0_0-21swapper/010:44:380
3129650390irq/29-eth0_g0_32749-21latency_hist11:24:190
3129650390irq/29-eth0_g0_24471-21iostat10:49:340
3129650390irq/29-eth0_g0_13-21kworker/0:112:38:570
3129650390irq/29-eth0_g0_13-21kworker/0:112:30:200
3129650390irq/29-eth0_g0_13-21kworker/0:109:44:430
2573993927cyclictest5788-21unixbench_singl07:19:411
2573993927cyclictest12840-21/usr/sbin/munin12:14:321
2573993925cyclictest8875-21cat09:44:411
2573993925cyclictest30861-21sort09:04:211
257399392cyclictest25426-21grep08:39:411
3129750380irq/30-eth0_g0_31295-21kworker/1:109:19:581
3129750380irq/30-eth0_g0_2045-21grep07:04:391
3129750380irq/30-eth0_g0_121ksoftirqd/111:00:101
3129650380irq/29-eth0_g0_2964-21df_abs11:34:300
3129650380irq/29-eth0_g0_20234-21ntp_kernel_pll_08:19:380
3129650380irq/29-eth0_g0_1875-21runrttasks08:34:270
3129650380irq/29-eth0_g0_1875-21runrttasks07:55:240
3129650380irq/29-eth0_g0_1875-21runrttasks07:30:500
3129650380irq/29-eth0_g0_13-21kworker/0:112:11:040
3129650380irq/29-eth0_g0_13-21kworker/0:111:54:420
3129650380irq/29-eth0_g0_13-21kworker/0:111:28:170
3129650380irq/29-eth0_g0_13-21kworker/0:111:12:160
3129650380irq/29-eth0_g0_13-21kworker/0:110:34:520
3129650380irq/29-eth0_g0_13-21kworker/0:109:29:190
3129650380irq/29-eth0_g0_121ksoftirqd/111:35:251
2573993826cyclictest12822-21cat07:49:371
2573993825cyclictest22693-21ntp_offset08:29:381
2573993825cyclictest13954-21sshd07:54:351
121380ksoftirqd/13129750irq/30-eth0_g0_12:07:250
121380ksoftirqd/13129750irq/30-eth0_g0_10:02:370
121380ksoftirqd/13129750irq/30-eth0_g0_08:43:540
121380ksoftirqd/119282-21unixbench_multi08:14:421
118152380sleep03129650irq/29-eth0_g0_09:58:320
3129750370irq/30-eth0_g0_31295-21kworker/1:110:24:581
3129650370irq/29-eth0_g0_9446-21unixbench_multi07:34:410
3129650370irq/29-eth0_g0_4117-21cpu11:39:290
3129650370irq/29-eth0_g0_20126-21taskset10:30:210
3129650370irq/29-eth0_g0_19301-21grep08:14:430
3129650370irq/29-eth0_g0_1875-21runrttasks09:10:190
3129650370irq/29-eth0_g0_1875-21runrttasks08:54:450
3129650370irq/29-eth0_g0_1875-21runrttasks08:26:440
3129650370irq/29-eth0_g0_1875-21runrttasks07:26:260
3129650370irq/29-eth0_g0_1875-21runrttasks07:26:260
3129650370irq/29-eth0_g0_1875-21runrttasks07:24:060
3129650370irq/29-eth0_g0_13-21kworker/0:111:52:490
3129650370irq/29-eth0_g0_13-21kworker/0:111:52:490
3129650370irq/29-eth0_g0_13-21kworker/0:111:47:240
3129650370irq/29-eth0_g0_13-21kworker/0:110:40:300
3129650370irq/29-eth0_g0_13-21kworker/0:110:09:520
3129650370irq/29-eth0_g0_13-21kworker/0:110:05:080
3129650370irq/29-eth0_g0_13-21kworker/0:110:05:080
2573993723cyclictest2175-21lldpd07:13:501
2573993723cyclictest2175-21lldpd07:13:501
3129750360irq/30-eth0_g0_131kworker/0:112:25:020
3129650360irq/29-eth0_g0_7741-21unixbench_singl09:39:430
3129650360irq/29-eth0_g0_30200-21find08:59:400
3129650360irq/29-eth0_g0_27670-21chrt08:49:390
3129650360irq/29-eth0_g0_1875-21runrttasks08:30:450
3129650360irq/29-eth0_g0_1875-21runrttasks07:39:220
3129650360irq/29-eth0_g0_18063-21/usr/sbin/munin08:09:420
3129650360irq/29-eth0_g0_15066-21df_abs07:59:330
3129650360irq/29-eth0_g0_13-21kworker/0:110:22:220
3129650360irq/29-eth0_g0_10178-21unixbench_multi09:49:420
3129650360irq/29-eth0_g0_0-21swapper/011:18:220
3129650360irq/29-eth0_g0_0-21swapper/011:02:490
2573993623cyclictest31573-21unixbench_singl09:04:411
2573993623cyclictest31573-21unixbench_singl09:04:411
2573993623cyclictest26644-21unixbench_multi08:44:411
121360ksoftirqd/13129750irq/30-eth0_g0_08:05:090
3129750350irq/30-eth0_g0_31295-21kworker/1:111:15:171
3129650350irq/29-eth0_g0_31463-21swap09:04:400
3129650350irq/29-eth0_g0_31463-21swap09:04:400
3129650350irq/29-eth0_g0_2727-21df_abs07:09:310
3129650350irq/29-eth0_g0_2727-21df_abs07:09:310
3129650350irq/29-eth0_g0_1875-21runrttasks07:53:250
3129650350irq/29-eth0_g0_0-21swapper/012:16:240
2573993525cyclictest7566-21runrttasks07:29:261
2573993523cyclictest6612-21cat07:24:361
2573993523cyclictest6612-21cat07:24:361
2573993423cyclictest91862sleep107:34:371
2573993420cyclictest4224-21missed_timers07:14:361
2573993322cyclictest0-21swapper/108:34:251
3129750310irq/30-eth0_g0_0-21swapper/107:41:371
2573993126cyclictest15234-21taskset07:59:371
2573993118cyclictest28906-21/usr/sbin/munin08:54:381
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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