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2026-07-17 - 18:56

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 Fri Jul 17, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1658121310sleep0121650irq/29-eth0_g0_09:30:310
2960421280sleep1121750irq/30-eth0_g0_12:37:241
1211160ksoftirqd/1121750irq/30-eth0_g0_11:40:151
1211140ksoftirqd/1121750irq/30-eth0_g0_09:26:221
121910ksoftirqd/1121750irq/30-eth0_g0_12:25:301
325392820sleep1121650irq/29-eth0_g0_10:35:591
172992800sleep1121750irq/30-eth0_g0_11:46:321
148302710sleep1121650irq/29-eth0_g0_11:36:141
121690ksoftirqd/1121750irq/30-eth0_g0_11:26:271
301212620sleep0121650irq/29-eth0_g0_10:26:180
96102570sleep1121750irq/30-eth0_g0_11:13:111
96102570sleep1121750irq/30-eth0_g0_11:13:111
121560ksoftirqd/1121650irq/29-eth0_g0_11:30:230
294312540sleep0121650irq/29-eth0_g0_12:35:210
121540ksoftirqd/1121750irq/30-eth0_g0_10:31:431
121460ksoftirqd/1121750irq/30-eth0_g0_12:29:171
121460ksoftirqd/1121750irq/30-eth0_g0_10:09:291
214332450sleep1121750irq/30-eth0_g0_09:50:011
121750450irq/30-eth0_g0_1219-21kworker/1:211:19:361
121450ksoftirqd/1121650irq/29-eth0_g0_12:20:431
121450ksoftirqd/1121650irq/29-eth0_g0_11:01:581
121450ksoftirqd/1121650irq/29-eth0_g0_09:11:000
121650440irq/29-eth0_g0_31ksoftirqd/011:17:590
121650440irq/29-eth0_g0_2171-21timerandwakeup10:43:090
121650440irq/29-eth0_g0_13-21kworker/0:111:03:010
121440ksoftirqd/1121750irq/30-eth0_g0_11:09:031
121440ksoftirqd/1121750irq/30-eth0_g0_11:09:031
121440ksoftirqd/1121750irq/30-eth0_g0_10:14:471
121440ksoftirqd/1121750irq/30-eth0_g0_10:04:031
121440ksoftirqd/1121750irq/30-eth0_g0_10:01:560
121440ksoftirqd/1121650irq/29-eth0_g0_09:15:381
121750430irq/30-eth0_g0_1219-21kworker/1:209:53:241
121750430irq/30-eth0_g0_1219-21kworker/1:209:33:291
121650430irq/29-eth0_g0_31ksoftirqd/011:58:100
121650430irq/29-eth0_g0_1964-21runrttasks08:47:150
121650430irq/29-eth0_g0_13-21kworker/0:110:54:110
121430ksoftirqd/1121750irq/30-eth0_g0_12:14:571
121430ksoftirqd/1121750irq/30-eth0_g0_09:17:570
121430ksoftirqd/1121650irq/29-eth0_g0_10:45:321
121750420irq/30-eth0_g0_1219-21kworker/1:210:19:561
121650420irq/29-eth0_g0_121ksoftirqd/109:28:231
121420ksoftirqd/1121650irq/29-eth0_g0_09:46:320
121750410irq/30-eth0_g0_1219-21kworker/1:209:18:091
121750410irq/30-eth0_g0_121ksoftirqd/111:10:230
121750410irq/30-eth0_g0_121ksoftirqd/111:10:230
121650410irq/29-eth0_g0_31ksoftirqd/012:29:120
121650410irq/29-eth0_g0_31ksoftirqd/010:04:380
121650410irq/29-eth0_g0_31ksoftirqd/009:38:100
121650410irq/29-eth0_g0_1964-21runrttasks07:05:390
121650410irq/29-eth0_g0_121ksoftirqd/111:38:420
121410ksoftirqd/1121650irq/29-eth0_g0_11:48:280
121410ksoftirqd/1121650irq/29-eth0_g0_07:18:051
121750400irq/30-eth0_g0_1219-21kworker/1:210:56:091
121750400irq/30-eth0_g0_121ksoftirqd/110:38:031
121650400irq/29-eth0_g0_9619-21unixbench_singl11:13:110
121650400irq/29-eth0_g0_9619-21unixbench_singl11:13:110
121650400irq/29-eth0_g0_5391-21sed10:57:590
121650400irq/29-eth0_g0_13-21kworker/0:112:13:350
121650400irq/29-eth0_g0_13-21kworker/0:111:27:330
121650400irq/29-eth0_g0_13-21kworker/0:109:48:310
121650400irq/29-eth0_g0_121ksoftirqd/112:09:480
121650400irq/29-eth0_g0_121ksoftirqd/110:38:030
121650400irq/29-eth0_g0_121ksoftirqd/110:31:060
121650400irq/29-eth0_g0_0-21swapper/010:21:440
1370799391cyclictest3977-21latency_hist10:52:471
1370799391cyclictest23690-21unixbench_singl09:58:091
1370799391cyclictest23064-21grep12:08:101
1370799391cyclictest18779-21sed09:38:121
121750390irq/30-eth0_g0_12833-21latency07:03:021
121750390irq/30-eth0_g0_1219-21kworker/1:211:55:171
121750390irq/30-eth0_g0_1219-21kworker/1:210:24:181
121750390irq/30-eth0_g0_121ksoftirqd/109:44:151
121650390irq/29-eth0_g0_21169-21/usr/sbin/munin12:03:080
121650390irq/29-eth0_g0_21142-21/usr/sbin/munin07:37:590
121650390irq/29-eth0_g0_13-21kworker/0:109:53:300
121650390irq/29-eth0_g0_13-21kworker/0:109:22:540
121390ksoftirqd/1121750irq/30-eth0_g0_10:16:100
1370799382cyclictest7623-21/usr/sbin/munin08:53:091
1370799381cyclictest20290-21netstat07:33:031
1370799381cyclictest14424-21tail07:08:091
1370799381cyclictest14424-21tail07:08:091
1370799381cyclictest12272chrt08:28:041
121750380irq/30-eth0_g0_13-21kworker/0:110:51:490
121750380irq/30-eth0_g0_1219-21kworker/1:211:50:091
121750380irq/30-eth0_g0_1219-21kworker/1:211:05:041
121750380irq/30-eth0_g0_121ksoftirqd/112:03:441
121750380irq/30-eth0_g0_121ksoftirqd/111:31:441
121650380irq/29-eth0_g0_7756-21sed08:53:100
121650380irq/29-eth0_g0_31ksoftirqd/009:33:070
121650380irq/29-eth0_g0_13-21kworker/0:111:56:410
121650380irq/29-eth0_g0_13-21kworker/0:111:36:040
121650380irq/29-eth0_g0_13-21kworker/0:110:12:370
121650380irq/29-eth0_g0_121ksoftirqd/112:23:020
121650380irq/29-eth0_g0_121ksoftirqd/110:33:030
121650380irq/29-eth0_g0_121ksoftirqd/107:17:480
121650380irq/29-eth0_g0_121ksoftirqd/107:17:480
121380ksoftirqd/1121750irq/30-eth0_g0_07:27:440
1370799372cyclictest29855-21df_inode08:13:011
1370799372cyclictest25539-21vmstat07:53:111
1370799372cyclictest11372-21sed09:08:091
1370799371cyclictest8993-21unixbench_singl08:58:091
1370799371cyclictest28811-21netstat08:08:031
1370799371cyclictest187582sleep107:27:591
121650370irq/29-eth0_g0_32510-21netstat08:23:030
121650370irq/29-eth0_g0_24941-21df_abs07:53:000
121650370irq/29-eth0_g0_22825-21proc_pri07:43:070
121650370irq/29-eth0_g0_22825-21proc_pri07:43:070
121650370irq/29-eth0_g0_1964-21runrttasks08:50:090
121650370irq/29-eth0_g0_1964-21runrttasks08:02:361
121650370irq/29-eth0_g0_17381-21latency_hist07:22:470
121650370irq/29-eth0_g0_16523-21latency11:43:010
121650370irq/29-eth0_g0_14169-21awk07:08:030
121650370irq/29-eth0_g0_14169-21awk07:08:030
121650370irq/29-eth0_g0_13-21kworker/0:112:20:340
1370799362cyclictest307-21tail08:23:081
1370799361cyclictest6352-21processes08:48:091
1370799361cyclictest4100-21grep08:38:101
1370799361cyclictest23053-21grep07:43:101
1370799361cyclictest23053-21grep07:43:101
121750360irq/30-eth0_g0_24156-21swap07:48:101
121750360irq/30-eth0_g0_24156-21swap07:48:101
121750360irq/30-eth0_g0_121ksoftirqd/111:59:301
121650360irq/29-eth0_g0_1964-21runrttasks09:03:320
121650360irq/29-eth0_g0_1964-21runrttasks08:41:030
121650360irq/29-eth0_g0_1964-21runrttasks08:13:540
121650360irq/29-eth0_g0_1964-21runrttasks07:37:220
121650360irq/29-eth0_g0_13-21kworker/0:109:16:220
1370799352cyclictest3334-21latency_hist08:37:471
121750350irq/30-eth0_g0_1370799cyclictest08:03:131
121650350irq/29-eth0_g0_8872-21cat08:58:080
121650350irq/29-eth0_g0_23886-21missed_timers07:48:040
121650350irq/29-eth0_g0_23886-21missed_timers07:48:040
121650350irq/29-eth0_g0_1964-21runrttasks08:11:110
121650350irq/29-eth0_g0_19548-21taskset07:29:330
121650350irq/29-eth0_g0_1314-21ntpdc08:28:060
121350ksoftirqd/1121650irq/29-eth0_g0_09:03:031
13707993419cyclictest18635-21grep07:27:471
1370799341cyclictest319822sleep108:22:031
1370799341cyclictest0-21swapper/107:40:311
121650340irq/29-eth0_g0_27906-21sed08:03:120
121650340irq/29-eth0_g0_26492-21proc_pri07:58:080
121750330irq/30-eth0_g0_15020-21/usr/sbin/munin07:13:081
121750330irq/30-eth0_g0_15020-21/usr/sbin/munin07:13:081
121750330irq/30-eth0_g0_0-21swapper/108:43:041
121650330irq/29-eth0_g0_31549-21unixbench_multi08:18:080
121650320irq/29-eth0_g0_0-21swapper/008:33:080
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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