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2026-03-28 - 21:00

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 Mar 28, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211030ksoftirqd/1121750irq/30-eth0_g0_12:16:521
121950ksoftirqd/1121750irq/30-eth0_g0_07:05:010
121850ksoftirqd/1121750irq/30-eth0_g0_11:33:121
121830ksoftirqd/1121750irq/30-eth0_g0_12:17:350
121810ksoftirqd/1121650irq/29-eth0_g0_07:26:510
259722780sleep1121650irq/29-eth0_g0_07:10:131
246182780sleep1121650irq/29-eth0_g0_09:19:521
121680ksoftirqd/1121750irq/30-eth0_g0_07:08:181
301262650sleep1121750irq/30-eth0_g0_11:54:521
121620ksoftirqd/1121750irq/30-eth0_g0_11:01:071
121600ksoftirqd/1121750irq/30-eth0_g0_10:28:301
138912560sleep1121650irq/29-eth0_g0_10:46:261
138912560sleep1121650irq/29-eth0_g0_10:46:261
66902540chrt121650irq/29-eth0_g0_10:17:541
121510ksoftirqd/1121750irq/30-eth0_g0_11:26:511
121510ksoftirqd/1121750irq/30-eth0_g0_07:29:241
249962490sleep0121750irq/30-eth0_g0_11:32:320
121490ksoftirqd/1121750irq/30-eth0_g0_10:08:091
121650480irq/29-eth0_g0_31ksoftirqd/011:45:090
121480ksoftirqd/1121750irq/30-eth0_g0_10:44:361
121480ksoftirqd/1121750irq/30-eth0_g0_10:44:361
121480ksoftirqd/1121750irq/30-eth0_g0_10:13:221
59652470chrt121650irq/29-eth0_g0_12:27:040
59652470chrt121650irq/29-eth0_g0_12:27:040
121470ksoftirqd/1121750irq/30-eth0_g0_11:17:441
121470ksoftirqd/1121750irq/30-eth0_g0_11:06:211
121470ksoftirqd/1121750irq/30-eth0_g0_11:06:211
121450ksoftirqd/1121650irq/29-eth0_g0_12:24:211
121650430irq/29-eth0_g0_1875-21runrttasks09:14:190
121650430irq/29-eth0_g0_1875-21runrttasks08:50:120
121430ksoftirqd/1121750irq/30-eth0_g0_09:46:040
121430ksoftirqd/1121650irq/29-eth0_g0_10:04:271
121750420irq/30-eth0_g0_1219-21kworker/1:212:10:181
121750420irq/30-eth0_g0_1219-21kworker/1:211:47:541
121420ksoftirqd/1121750irq/30-eth0_g0_12:20:290
116752420sleep0121650irq/29-eth0_g0_10:39:090
2525799411cyclictest18724-21sed08:55:041
121650410irq/29-eth0_g0_861-21df09:55:000
121650410irq/29-eth0_g0_861-21df09:55:000
121650410irq/29-eth0_g0_548-21ntp_offset12:05:080
121650410irq/29-eth0_g0_31ksoftirqd/011:16:130
121650410irq/29-eth0_g0_1875-21runrttasks11:51:050
121650410irq/29-eth0_g0_1875-21runrttasks08:30:320
121650410irq/29-eth0_g0_13-21kworker/0:111:10:220
121650410irq/29-eth0_g0_121ksoftirqd/110:30:071
121410ksoftirqd/1121750irq/30-eth0_g0_11:59:381
121410ksoftirqd/1121750irq/30-eth0_g0_11:59:381
121410ksoftirqd/1121650irq/29-eth0_g0_12:08:371
121410ksoftirqd/1121650irq/29-eth0_g0_11:38:381
121410ksoftirqd/1121650irq/29-eth0_g0_11:38:381
2525799402cyclictest26908-21seq11:40:081
2525799401cyclictest8233-21unixbench_multi08:10:151
121750400irq/30-eth0_g0_121ksoftirqd/111:21:050
121750400irq/30-eth0_g0_121ksoftirqd/110:52:191
121650400irq/29-eth0_g0_23233-21ntp_offset11:25:090
121650400irq/29-eth0_g0_13-21kworker/0:111:57:210
121650400irq/29-eth0_g0_13-21kworker/0:111:57:210
121650400irq/29-eth0_g0_13-21kworker/0:110:45:210
121650400irq/29-eth0_g0_13-21kworker/0:110:45:210
121650400irq/29-eth0_g0_13-21kworker/0:110:41:140
121650400irq/29-eth0_g0_13-21kworker/0:110:41:140
121650400irq/29-eth0_g0_13-21kworker/0:109:30:390
121650400irq/29-eth0_g0_0-21swapper/012:30:110
2525799391cyclictest7571-21unixbench_multi10:20:151
2525799391cyclictest129002sleep108:30:111
121750390irq/30-eth0_g0_32396-21taskset12:03:241
121750390irq/30-eth0_g0_121ksoftirqd/109:55:051
121750390irq/30-eth0_g0_121ksoftirqd/109:55:051
121650390irq/29-eth0_g0_31ksoftirqd/010:29:030
121650390irq/29-eth0_g0_31ksoftirqd/009:49:580
121650390irq/29-eth0_g0_2525799cyclictest07:20:121
121650390irq/29-eth0_g0_2525799cyclictest07:20:121
121650390irq/29-eth0_g0_121ksoftirqd/111:39:060
121650390irq/29-eth0_g0_121ksoftirqd/111:39:060
121650390irq/29-eth0_g0_121ksoftirqd/110:20:010
121650390irq/29-eth0_g0_121ksoftirqd/110:11:530
121390ksoftirqd/1121750irq/30-eth0_g0_11:09:450
121390ksoftirqd/1121750irq/30-eth0_g0_11:09:450
99432380sleep0121650irq/29-eth0_g0_10:30:120
2525799382cyclictest1522-21df07:45:011
2525799382cyclictest1522-21df07:45:011
2525799381cyclictest5060-21seq07:59:521
186562380sleep031ksoftirqd/008:55:040
121750380irq/30-eth0_g0_1219-21kworker/1:209:52:121
121750380irq/30-eth0_g0_1219-21kworker/1:209:41:291
121750380irq/30-eth0_g0_0-21swapper/112:25:431
121750380irq/30-eth0_g0_0-21swapper/112:25:431
121750380irq/30-eth0_g0_0-21swapper/109:27:331
121650380irq/29-eth0_g0_29972-21awk09:40:080
121650380irq/29-eth0_g0_1875-21runrttasks09:16:170
121650380irq/29-eth0_g0_13-21kworker/0:112:12:380
121650380irq/29-eth0_g0_13-21kworker/0:110:59:070
121650380irq/29-eth0_g0_13-21kworker/0:110:52:300
121650380irq/29-eth0_g0_13-21kworker/0:109:25:480
2525799371cyclictest5398-21wc08:00:071
2525799371cyclictest3174-21ps07:50:111
2525799371cyclictest202162sleep109:00:101
2525799371cyclictest18001-21unixbench_multi08:50:141
2525799371cyclictest11246-21grep10:35:121
121750370irq/30-eth0_g0_6899-21zcat08:05:131
121750370irq/30-eth0_g0_22169-21diskmemload12:38:231
121750370irq/30-eth0_g0_1219-21kworker/1:212:30:511
121750370irq/30-eth0_g0_1219-21kworker/1:211:11:481
121750370irq/30-eth0_g0_1219-21kworker/1:209:23:391
121650370irq/29-eth0_g0_4614-21unixbench_singl07:55:150
121650370irq/29-eth0_g0_31ksoftirqd/010:01:150
121650370irq/29-eth0_g0_26925-21sshd11:40:090
121650370irq/29-eth0_g0_2525699cyclictest12:00:270
121650370irq/29-eth0_g0_22972-21head09:10:131
121650370irq/29-eth0_g0_1875-21runrttasks12:36:420
121650370irq/29-eth0_g0_1875-21runrttasks11:01:330
121650370irq/29-eth0_g0_1875-21runrttasks09:00:130
121650370irq/29-eth0_g0_1875-21runrttasks08:49:250
121650370irq/29-eth0_g0_1875-21runrttasks08:35:500
121650370irq/29-eth0_g0_13-21kworker/0:109:20:130
121650370irq/29-eth0_g0_121ksoftirqd/110:59:201
121650370irq/29-eth0_g0_0-21swapper/010:07:210
121650370irq/29-eth0_g0_0-21swapper/009:37:210
2525799361cyclictest31411-21cat07:34:521
2525799361cyclictest28338-21cat09:34:521
2525799361cyclictest27255-21sed07:15:131
2525799361cyclictest15574-21grep08:40:121
2525799361cyclictest14246-21awk08:35:111
121750360irq/30-eth0_g0_31ksoftirqd/010:16:540
121750360irq/30-eth0_g0_1894-21/usr/sbin/munin11:20:031
121750360irq/30-eth0_g0_1219-21kworker/1:209:45:241
121750360irq/30-eth0_g0_1219-21kworker/1:209:37:261
121650360irq/29-eth0_g0_8811-21/usr/sbin/munin08:15:130
121650360irq/29-eth0_g0_32644-21ls07:39:520
121650360irq/29-eth0_g0_26512-21sort07:14:520
121650360irq/29-eth0_g0_1875-21runrttasks09:05:360
121650360irq/29-eth0_g0_1875-21runrttasks08:42:290
121650360irq/29-eth0_g0_1875-21runrttasks08:26:150
121650360irq/29-eth0_g0_1875-21runrttasks08:03:460
121650360irq/29-eth0_g0_1875-21runrttasks07:47:420
121650360irq/29-eth0_g0_1875-21runrttasks07:47:420
121360ksoftirqd/1121650irq/29-eth0_g0_07:35:061
2525799352cyclictest21094-21df09:05:031
2525799351cyclictest9977-21latency_hist08:19:521
2525799351cyclictest0-21swapper/108:20:301
121650350irq/29-eth0_g0_8152-21sendmail_mailtr08:10:140
121650350irq/29-eth0_g0_756-21wc07:40:110
121650350irq/29-eth0_g0_26934-21netstat07:15:070
121650350irq/29-eth0_g0_1875-21runrttasks08:21:180
121650350irq/29-eth0_g0_1875-21runrttasks08:07:420
2525799341cyclictest0-21swapper/108:26:041
121650340irq/29-eth0_g0_28250-21chrt07:20:110
121650340irq/29-eth0_g0_28250-21chrt07:20:110
121650340irq/29-eth0_g0_1875-21runrttasks07:52:350
121650340irq/29-eth0_g0_1875-21runrttasks07:31:260
2525799331cyclictest16543-21ntpq08:45:091
121750330irq/30-eth0_g0_846-21unixbench_multi07:40:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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