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2026-03-29 - 10:56

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 792 highest latencies:
System rack3slot5s.osadl.org (updated Sun Mar 29, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
276152970sleep0121650irq/29-eth0_g0_20:45:070
121780ksoftirqd/1121750irq/30-eth0_g0_19:34:330
259432750sleep1121750irq/30-eth0_g0_20:39:511
191272730sleep1121750irq/30-eth0_g0_22:23:181
137142720sleep1121750irq/30-eth0_g0_00:13:281
227052690sleep0121750irq/30-eth0_g0_20:25:060
121690ksoftirqd/1121750irq/30-eth0_g0_00:09:451
237092650sleep0121650irq/29-eth0_g0_20:30:020
49172580sleep0121750irq/30-eth0_g0_19:13:090
121530ksoftirqd/1121750irq/30-eth0_g0_19:39:531
121520ksoftirqd/1121750irq/30-eth0_g0_20:25:021
121520ksoftirqd/1121750irq/30-eth0_g0_19:10:041
121520ksoftirqd/1121650irq/29-eth0_g0_23:10:081
121520ksoftirqd/1121650irq/29-eth0_g0_21:30:241
121510ksoftirqd/1121750irq/30-eth0_g0_21:47:321
25512500sleep0121750irq/30-eth0_g0_21:15:070
25512500sleep0121750irq/30-eth0_g0_21:15:070
121500ksoftirqd/1121750irq/30-eth0_g0_21:41:201
121500ksoftirqd/1121750irq/30-eth0_g0_21:25:271
121490ksoftirqd/1121750irq/30-eth0_g0_00:36:401
121490ksoftirqd/1121650irq/29-eth0_g0_20:15:140
121490ksoftirqd/1121650irq/29-eth0_g0_00:17:430
121480ksoftirqd/1121750irq/30-eth0_g0_20:55:511
3838994620cyclictest20701-21df_abs22:30:011
121650460irq/29-eth0_g0_31ksoftirqd/022:28:210
121460ksoftirqd/1121750irq/30-eth0_g0_21:59:021
121460ksoftirqd/1121750irq/30-eth0_g0_19:50:121
121460ksoftirqd/1121750irq/30-eth0_g0_00:02:010
121460ksoftirqd/1121650irq/29-eth0_g0_22:36:461
383899451cyclictest29422-21seq20:52:501
121650450irq/29-eth0_g0_121ksoftirqd/123:52:240
121450ksoftirqd/1121750irq/30-eth0_g0_00:23:231
121450ksoftirqd/1121750irq/30-eth0_g0_00:03:511
121650440irq/29-eth0_g0_0-21swapper/019:07:590
121440ksoftirqd/1121650irq/29-eth0_g0_22:50:511
3838994327cyclictest1875-21runrttasks20:01:351
121750430irq/30-eth0_g0_26709-21/usr/sbin/munin22:55:121
121750430irq/30-eth0_g0_121ksoftirqd/123:07:021
121430ksoftirqd/1121750irq/30-eth0_g0_22:42:520
121430ksoftirqd/1121650irq/29-eth0_g0_23:46:271
121430ksoftirqd/1121650irq/29-eth0_g0_20:15:071
121750420irq/30-eth0_g0_1219-21kworker/1:223:51:501
121750420irq/30-eth0_g0_1219-21kworker/1:221:36:041
121650420irq/29-eth0_g0_8390-21df_abs21:40:010
121650420irq/29-eth0_g0_31ksoftirqd/023:09:500
121650420irq/29-eth0_g0_31ksoftirqd/000:12:510
121420ksoftirqd/1121750irq/30-eth0_g0_22:15:390
121420ksoftirqd/1121650irq/29-eth0_g0_23:20:101
383899412cyclictest16313-21tail22:10:111
121650410irq/29-eth0_g0_31ksoftirqd/021:09:550
121650410irq/29-eth0_g0_1875-21runrttasks21:44:580
121650410irq/29-eth0_g0_1875-21runrttasks21:28:040
121650410irq/29-eth0_g0_18226-21unixbench_multi00:30:130
121650410irq/29-eth0_g0_18226-21unixbench_multi00:30:130
121650410irq/29-eth0_g0_13-21kworker/0:123:30:070
121650410irq/29-eth0_g0_0-21swapper/023:20:120
121410ksoftirqd/1121750irq/30-eth0_g0_22:50:030
121750400irq/30-eth0_g0_13-21kworker/0:122:55:100
121750400irq/30-eth0_g0_1219-21kworker/1:223:25:391
121750400irq/30-eth0_g0_1219-21kworker/1:222:41:371
121750400irq/30-eth0_g0_0-21swapper/123:59:051
121650400irq/29-eth0_g0_19228-21runrttasks00:35:090
121650400irq/29-eth0_g0_13-21kworker/0:122:45:570
121650400irq/29-eth0_g0_13-21kworker/0:122:00:190
121650400irq/29-eth0_g0_13-21kworker/0:121:50:200
121650400irq/29-eth0_g0_13-21kworker/0:100:24:300
121650400irq/29-eth0_g0_10599-21find19:35:100
383899391cyclictest6025-21head23:40:111
121750390irq/30-eth0_g0_24655-21taskset22:45:071
121750390irq/30-eth0_g0_1219-21kworker/1:223:15:351
121750390irq/30-eth0_g0_121ksoftirqd/122:19:371
121750390irq/30-eth0_g0_121ksoftirqd/100:33:511
121750390irq/30-eth0_g0_121ksoftirqd/100:33:511
121650390irq/29-eth0_g0_8241-21grep19:25:120
121650390irq/29-eth0_g0_6260-21ntp_states21:30:080
121650390irq/29-eth0_g0_4688-21timerandwakeup23:35:110
121650390irq/29-eth0_g0_1875-21runrttasks23:11:190
121650390irq/29-eth0_g0_13-21kworker/0:123:26:490
121650390irq/29-eth0_g0_13-21kworker/0:123:01:560
121650390irq/29-eth0_g0_13-21kworker/0:123:01:560
121650390irq/29-eth0_g0_13-21kworker/0:122:35:510
121650390irq/29-eth0_g0_13-21kworker/0:122:22:490
121650390irq/29-eth0_g0_13-21kworker/0:122:11:120
121650390irq/29-eth0_g0_13-21kworker/0:121:55:460
121650390irq/29-eth0_g0_13-21kworker/0:121:20:160
121650390irq/29-eth0_g0_13-21kworker/0:100:07:100
121390ksoftirqd/1121650irq/29-eth0_g0_23:36:491
121390ksoftirqd/1121650irq/29-eth0_g0_19:24:511
383899382cyclictest14985-21wc22:05:101
383899382cyclictest14985-21wc22:05:101
383899381cyclictest1875-21runrttasks20:45:091
383899381cyclictest14156-21/usr/sbin/munin00:15:041
383899381cyclictest10660-21cat19:35:111
121750380irq/30-eth0_g0_1219-21kworker/1:221:20:451
121750380irq/30-eth0_g0_0-21swapper/121:13:291
121650380irq/29-eth0_g0_3526-21runrttasks19:06:221
121650380irq/29-eth0_g0_31ksoftirqd/023:15:120
121650380irq/29-eth0_g0_21771-21unixbench_singl20:20:110
121650380irq/29-eth0_g0_20809-21iostat22:30:040
121650380irq/29-eth0_g0_1875-21runrttasks21:00:270
121650380irq/29-eth0_g0_13-21kworker/0:122:09:410
121650380irq/29-eth0_g0_13-21kworker/0:122:09:410
121650380irq/29-eth0_g0_13-21kworker/0:100:24:580
383899372cyclictest23955-21ntp_states20:30:071
383899372cyclictest18777-21df_abs20:10:041
383899372cyclictest18777-21df_abs20:10:041
383899371cyclictest28577-21sed23:00:121
383899371cyclictest28577-21sed23:00:121
383899371cyclictest19646-21taskset22:25:061
121750370irq/30-eth0_g0_1219-21kworker/1:223:30:221
121750370irq/30-eth0_g0_1219-21kworker/1:221:50:091
121750370irq/30-eth0_g0_1219-21kworker/1:200:25:071
121750370irq/30-eth0_g0_121ksoftirqd/122:01:461
121750370irq/30-eth0_g0_0-21swapper/121:16:231
121750370irq/30-eth0_g0_0-21swapper/121:16:231
121650370irq/29-eth0_g0_830-21latency_hist21:09:510
121650370irq/29-eth0_g0_16588-21taskset20:00:080
121650370irq/29-eth0_g0_13-21kworker/0:123:55:040
121650370irq/29-eth0_g0_13-21kworker/0:123:46:110
121650370irq/29-eth0_g0_13-21kworker/0:123:40:360
121650370irq/29-eth0_g0_13-21kworker/0:121:37:590
383899362cyclictest8800-21latency_hist19:29:511
383899361cyclictest15504-21chrt19:55:121
121750360irq/30-eth0_g0_0-21swapper/119:47:041
121650360irq/29-eth0_g0_29688-21runrttasks20:55:010
121650360irq/29-eth0_g0_13036-21processes19:45:090
383899351cyclictest26378-21netstat20:40:071
121750350irq/30-eth0_g0_383899cyclictest21:05:101
121750350irq/30-eth0_g0_17854-21open_inodes20:05:081
121650350irq/29-eth0_g0_5434-21latency19:15:060
121650350irq/29-eth0_g0_28994-21sendmail_mailqu20:50:100
121650350irq/29-eth0_g0_15631-21grep19:55:130
121650350irq/29-eth0_g0_14148-21taskset19:50:080
121650350irq/29-eth0_g0_0-21swapper/119:19:291
121650350irq/29-eth0_g0_0-21swapper/020:10:120
121650350irq/29-eth0_g0_0-21swapper/020:10:120
383899342cyclictest21311-21if_eth020:20:031
383899341cyclictest0-21swapper/119:30:041
121650340irq/29-eth0_g0_6920-21fgrep19:20:100
121650340irq/29-eth0_g0_26637-21unixbench_multi20:40:120
121650340irq/29-eth0_g0_25727-21runrttasks20:37:380
121650340irq/29-eth0_g0_18082-21unixbench_multi20:05:110
121650340irq/29-eth0_g0_11351-21df19:40:020
121320ksoftirqd/1121650irq/29-eth0_g0_21:00:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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