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2026-03-31 - 22:05

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 Mar 31, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
603699303456303434cyclictest2472-21latency_hist11:19:450
121870ksoftirqd/1121750irq/30-eth0_g0_11:03:551
121850ksoftirqd/1121750irq/30-eth0_g0_11:45:421
121760ksoftirqd/1121750irq/30-eth0_g0_10:37:120
121700ksoftirqd/1188792sleep010:13:590
121700ksoftirqd/1188792sleep010:13:590
275292690sleep1121750irq/30-eth0_g0_10:49:451
223162670sleep1121650irq/29-eth0_g0_10:26:141
22102490sleep1121650irq/29-eth0_g0_11:17:081
222802480sleep0121650irq/29-eth0_g0_10:25:490
121480ksoftirqd/1121750irq/30-eth0_g0_12:07:571
121480ksoftirqd/1121650irq/29-eth0_g0_09:35:531
121470ksoftirqd/1121650irq/29-eth0_g0_09:16:151
121460ksoftirqd/1121750irq/30-eth0_g0_12:16:251
121460ksoftirqd/1121750irq/30-eth0_g0_10:35:141
121460ksoftirqd/1121750irq/30-eth0_g0_10:10:181
121460ksoftirqd/1121750irq/30-eth0_g0_10:10:181
121460ksoftirqd/1121750irq/30-eth0_g0_09:59:271
121460ksoftirqd/1121750irq/30-eth0_g0_09:43:281
121460ksoftirqd/1121650irq/29-eth0_g0_12:14:191
121650450irq/29-eth0_g0_31ksoftirqd/012:11:480
41492440sleep0121650irq/29-eth0_g0_09:13:390
121750440irq/30-eth0_g0_121ksoftirqd/110:05:151
121650440irq/29-eth0_g0_1875-21runrttasks11:43:010
121440ksoftirqd/1121650irq/29-eth0_g0_11:55:311
121650430irq/29-eth0_g0_13-21kworker/0:110:04:410
121650430irq/29-eth0_g0_0-21swapper/009:55:070
121430ksoftirqd/1121750irq/30-eth0_g0_12:31:401
121430ksoftirqd/1121750irq/30-eth0_g0_12:31:401
121430ksoftirqd/1121750irq/30-eth0_g0_12:21:501
121430ksoftirqd/1121750irq/30-eth0_g0_10:43:311
121750420irq/30-eth0_g0_1219-21kworker/1:211:52:321
121650420irq/29-eth0_g0_13-21kworker/0:111:20:060
121650420irq/29-eth0_g0_13-21kworker/0:111:14:220
121650420irq/29-eth0_g0_13-21kworker/0:110:57:280
121650420irq/29-eth0_g0_13-21kworker/0:110:57:280
121650420irq/29-eth0_g0_13-21kworker/0:109:44:510
121420ksoftirqd/1121750irq/30-eth0_g0_09:54:351
121420ksoftirqd/1121650irq/29-eth0_g0_11:36:490
121420ksoftirqd/1121650irq/29-eth0_g0_09:30:221
603799411cyclictest21228-21grep08:10:021
121750410irq/30-eth0_g0_1219-21kworker/1:210:01:081
121750410irq/30-eth0_g0_12067-21ntpdc09:45:011
121650410irq/29-eth0_g0_1875-21runrttasks12:37:510
121650410irq/29-eth0_g0_16826-21irqstats10:05:000
121650410irq/29-eth0_g0_13-21kworker/0:112:23:590
121650410irq/29-eth0_g0_13-21kworker/0:109:54:320
121650410irq/29-eth0_g0_121ksoftirqd/110:15:240
121410ksoftirqd/1121750irq/30-eth0_g0_08:20:020
121410ksoftirqd/1121750irq/30-eth0_g0_08:20:020
603799401cyclictest25067-21awk08:25:071
603799401cyclictest25067-21awk08:25:071
603799401cyclictest18833-21/usr/sbin/munin12:25:011
603799401cyclictest18758-21awk08:00:001
121750400irq/30-eth0_g0_27731-21df_abs10:49:561
121750400irq/30-eth0_g0_1219-21kworker/1:212:00:271
121750400irq/30-eth0_g0_1219-21kworker/1:210:14:581
121750400irq/30-eth0_g0_121ksoftirqd/109:12:431
121650400irq/29-eth0_g0_31ksoftirqd/011:25:060
121650400irq/29-eth0_g0_1875-21runrttasks07:27:480
121650400irq/29-eth0_g0_15997-21df_abs07:49:570
121650400irq/29-eth0_g0_13-21kworker/0:110:33:590
121650400irq/29-eth0_g0_13-21kworker/0:109:32:300
121650400irq/29-eth0_g0_121ksoftirqd/109:35:240
121650400irq/29-eth0_g0_0-21swapper/007:05:000
121400ksoftirqd/1121750irq/30-eth0_g0_08:13:240
121400ksoftirqd/1121650irq/29-eth0_g0_08:32:171
121400ksoftirqd/1121650irq/29-eth0_g0_07:23:421
603799391cyclictest23839-21awk08:20:061
603799391cyclictest23839-21awk08:20:061
603799391cyclictest10265-21ps07:25:031
121750390irq/30-eth0_g0_1219-21kworker/1:211:04:581
121750390irq/30-eth0_g0_121ksoftirqd/111:38:351
121650390irq/29-eth0_g0_6153-21timerandwakeup09:20:060
121650390irq/29-eth0_g0_31953-21unixbench_singl11:05:070
121650390irq/29-eth0_g0_31ksoftirqd/012:15:590
121650390irq/29-eth0_g0_29479-21df_abs08:44:580
121650390irq/29-eth0_g0_29345-21latency_hist08:44:450
121650390irq/29-eth0_g0_1875-21runrttasks11:51:300
121650390irq/29-eth0_g0_13-21kworker/0:112:27:550
121650390irq/29-eth0_g0_13-21kworker/0:109:27:440
121650390irq/29-eth0_g0_11336-21irqstats11:54:580
121390ksoftirqd/1121750irq/30-eth0_g0_12:32:530
121390ksoftirqd/1121750irq/30-eth0_g0_12:32:530
121390ksoftirqd/1121750irq/30-eth0_g0_11:48:130
121390ksoftirqd/1121750irq/30-eth0_g0_11:32:570
121390ksoftirqd/1121750irq/30-eth0_g0_10:42:550
121390ksoftirqd/1121750irq/30-eth0_g0_10:22:150
121390ksoftirqd/1121750irq/30-eth0_g0_09:40:160
121390ksoftirqd/1121750irq/30-eth0_g0_07:23:350
121390ksoftirqd/1121650irq/29-eth0_g0_12:38:511
121390ksoftirqd/1121650irq/29-eth0_g0_10:32:551
121390ksoftirqd/1121650irq/29-eth0_g0_08:46:591
121390ksoftirqd/1121650irq/29-eth0_g0_07:11:301
121390ksoftirqd/1121650irq/29-eth0_g0_07:11:301
603799382cyclictest20308-21unixbench_singl08:05:061
603799381cyclictest3017-21diskmemload11:11:371
121750380irq/30-eth0_g0_1219-21kworker/1:211:33:331
121750380irq/30-eth0_g0_121ksoftirqd/111:28:511
121650380irq/29-eth0_g0_31ksoftirqd/008:50:050
121650380irq/29-eth0_g0_1875-21runrttasks07:12:520
121650380irq/29-eth0_g0_1875-21runrttasks07:12:520
121650380irq/29-eth0_g0_17699-21sendmail_mailst07:55:041
121650380irq/29-eth0_g0_13-21kworker/0:112:07:490
121650380irq/29-eth0_g0_13-21kworker/0:112:03:470
121650380irq/29-eth0_g0_13-21kworker/0:111:00:030
121650380irq/29-eth0_g0_13-21kworker/0:110:48:230
121650380irq/29-eth0_g0_11269-21uname07:30:000
121380ksoftirqd/1121650irq/29-eth0_g0_10:23:281
121380ksoftirqd/1121650irq/29-eth0_g0_09:01:321
121380ksoftirqd/1121650irq/29-eth0_g0_09:01:321
121380ksoftirqd/1121650irq/29-eth0_g0_08:55:001
121380ksoftirqd/1121650irq/29-eth0_g0_07:42:241
121380ksoftirqd/1121650irq/29-eth0_g0_07:16:221
121380ksoftirqd/1121650irq/29-eth0_g0_07:16:221
603799371cyclictest8020-21timerandwakeup11:40:051
603799371cyclictest12169-21cat07:34:451
121750370irq/30-eth0_g0_5355-21proc_pri07:05:031
121750370irq/30-eth0_g0_0-21swapper/110:55:021
121750370irq/30-eth0_g0_0-21swapper/110:55:021
121650370irq/29-eth0_g0_4338-21/usr/sbin/munin09:14:550
121650370irq/29-eth0_g0_1875-21runrttasks08:57:340
121650370irq/29-eth0_g0_1875-21runrttasks07:45:550
121650370irq/29-eth0_g0_13-21kworker/0:110:50:260
603799361cyclictest28828-21tail08:40:061
603799361cyclictest28052sleep111:19:591
603799361cyclictest17120-21cat07:54:461
121750360irq/30-eth0_g0_1219-21kworker/1:209:26:121
121750360irq/30-eth0_g0_1219-21kworker/1:209:23:471
121650360irq/29-eth0_g0_603699cyclictest07:40:020
121650360irq/29-eth0_g0_3055-21taskset09:09:450
121650360irq/29-eth0_g0_31ksoftirqd/007:15:030
121650360irq/29-eth0_g0_31ksoftirqd/007:15:030
121650360irq/29-eth0_g0_27589-21unixbench_multi08:35:060
121650360irq/29-eth0_g0_25702-21sort08:29:450
121650360irq/29-eth0_g0_25702-21sort08:29:450
121650360irq/29-eth0_g0_1875-21runrttasks07:57:580
121650360irq/29-eth0_g0_1875-21runrttasks07:38:310
121360ksoftirqd/1121650irq/29-eth0_g0_08:15:011
603799352cyclictest12317-21df07:34:581
603799351cyclictest2338-21proc_pri09:05:041
121650350irq/29-eth0_g0_19610-21egrep08:04:560
121650350irq/29-eth0_g0_1875-21runrttasks08:15:420
121650350irq/29-eth0_g0_1213-21timerandwakeup09:00:030
121650350irq/29-eth0_g0_1213-21timerandwakeup09:00:030
603799342cyclictest14999-21memory07:45:001
603799341cyclictest30628-21/usr/sbin/munin08:49:551
603799341cyclictest0-21swapper/108:39:311
121650340irq/29-eth0_g0_1875-21runrttasks08:00:490
121650330irq/29-eth0_g0_26388-21unixbench_multi08:30:090
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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