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2026-11-15 - 06:41

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 Nov 13, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
786621550chrt121450irq/29-eth0_g0_11:42:181
156421540sleep1121450irq/29-eth0_g0_11:15:301
67082800sleep1121450irq/29-eth0_g0_11:38:041
128952710sleep0121550irq/30-eth0_g0_09:50:090
121620ksoftirqd/1121550irq/30-eth0_g0_07:05:041
68312590sleep0121550irq/30-eth0_g0_11:39:300
185322590sleep1121550irq/30-eth0_g0_08:00:131
317852580sleep1121450irq/29-eth0_g0_11:08:121
70652550sleep1121550irq/30-eth0_g0_09:25:331
121520ksoftirqd/1121550irq/30-eth0_g0_08:10:061
121500ksoftirqd/1121550irq/30-eth0_g0_11:46:461
121500ksoftirqd/1121550irq/30-eth0_g0_11:46:461
121500ksoftirqd/1121550irq/30-eth0_g0_10:38:341
121450470irq/29-eth0_g0_5560-21cyclictest07:09:510
121470ksoftirqd/1121550irq/30-eth0_g0_12:18:501
121450460irq/29-eth0_g0_31ksoftirqd/011:40:000
121460ksoftirqd/1121550irq/30-eth0_g0_11:32:421
121450ksoftirqd/1121550irq/30-eth0_g0_10:49:021
121450ksoftirqd/1121450irq/29-eth0_g0_12:33:371
121450ksoftirqd/1121450irq/29-eth0_g0_09:18:581
121450ksoftirqd/1121450irq/29-eth0_g0_09:08:541
121450ksoftirqd/1121450irq/29-eth0_g0_08:58:351
121450ksoftirqd/1121450irq/29-eth0_g0_08:25:591
121450ksoftirqd/1121450irq/29-eth0_g0_08:25:591
121550430irq/30-eth0_g0_9866-21ps11:50:111
121550430irq/30-eth0_g0_121ksoftirqd/107:30:051
121550430irq/30-eth0_g0_0-21swapper/110:13:301
121450430irq/29-eth0_g0_1941-21runrttasks11:23:410
121450430irq/29-eth0_g0_1941-21runrttasks11:23:410
121430ksoftirqd/1121450irq/29-eth0_g0_12:04:091
121430ksoftirqd/1121450irq/29-eth0_g0_10:59:371
121430ksoftirqd/1121450irq/29-eth0_g0_10:59:371
121430ksoftirqd/1121450irq/29-eth0_g0_10:29:441
121550420irq/30-eth0_g0_1221-21kworker/1:209:45:051
121450420irq/29-eth0_g0_31ksoftirqd/010:18:490
121450420irq/29-eth0_g0_1941-21runrttasks11:25:280
121450420irq/29-eth0_g0_1941-21runrttasks11:25:280
121450420irq/29-eth0_g0_13-21kworker/0:110:51:320
121550410irq/30-eth0_g0_1221-21kworker/1:209:32:431
121550410irq/30-eth0_g0_121ksoftirqd/110:30:591
121450410irq/29-eth0_g0_31ksoftirqd/012:17:280
121450410irq/29-eth0_g0_31ksoftirqd/009:00:080
121450410irq/29-eth0_g0_31ksoftirqd/009:00:080
121450410irq/29-eth0_g0_13-21kworker/0:109:58:220
121450410irq/29-eth0_g0_121ksoftirqd/109:31:390
121410ksoftirqd/1121450irq/29-eth0_g0_12:08:351
121410ksoftirqd/1121450irq/29-eth0_g0_07:49:371
121550400irq/30-eth0_g0_1221-21kworker/1:210:02:241
121550400irq/30-eth0_g0_1221-21kworker/1:210:02:241
121550400irq/30-eth0_g0_121ksoftirqd/111:57:521
121450400irq/29-eth0_g0_31ksoftirqd/010:55:020
121450400irq/29-eth0_g0_31ksoftirqd/010:55:020
121450400irq/29-eth0_g0_31ksoftirqd/010:06:090
121450400irq/29-eth0_g0_13-21kworker/0:112:12:160
121450400irq/29-eth0_g0_13-21kworker/0:112:08:510
121450400irq/29-eth0_g0_13-21kworker/0:111:52:380
121450400irq/29-eth0_g0_13-21kworker/0:111:32:430
121450400irq/29-eth0_g0_13-21kworker/0:110:22:000
121450400irq/29-eth0_g0_13-21kworker/0:110:03:080
121450400irq/29-eth0_g0_13-21kworker/0:110:03:080
121450400irq/29-eth0_g0_13-21kworker/0:109:40:290
121450400irq/29-eth0_g0_121ksoftirqd/111:47:410
121450400irq/29-eth0_g0_121ksoftirqd/111:47:410
121450400irq/29-eth0_g0_10949-21missed_timers11:55:060
121400ksoftirqd/1121550irq/30-eth0_g0_09:18:560
121400ksoftirqd/1121550irq/30-eth0_g0_07:38:080
121400ksoftirqd/1121550irq/30-eth0_g0_07:38:080
121400ksoftirqd/1121550irq/30-eth0_g0_07:22:500
121400ksoftirqd/1121450irq/29-eth0_g0_11:20:581
121400ksoftirqd/1121450irq/29-eth0_g0_11:20:581
121400ksoftirqd/1121450irq/29-eth0_g0_09:02:061
121400ksoftirqd/1121450irq/29-eth0_g0_09:02:061
121550390irq/30-eth0_g0_1221-21kworker/1:209:21:041
121550390irq/30-eth0_g0_121ksoftirqd/112:35:121
121550390irq/30-eth0_g0_121ksoftirqd/110:24:171
121550390irq/30-eth0_g0_0-21swapper/110:54:321
121550390irq/30-eth0_g0_0-21swapper/109:40:071
121450390irq/29-eth0_g0_31ksoftirqd/009:45:100
121450390irq/29-eth0_g0_17787-21proc_pri10:10:110
121450390irq/29-eth0_g0_13-21kworker/0:112:32:170
121450390irq/29-eth0_g0_13-21kworker/0:112:01:420
121450390irq/29-eth0_g0_13-21kworker/0:110:36:540
121450390irq/29-eth0_g0_13-21kworker/0:109:39:240
121390ksoftirqd/1121550irq/30-eth0_g0_11:17:380
121390ksoftirqd/1121550irq/30-eth0_g0_11:12:230
121390ksoftirqd/1121550irq/30-eth0_g0_11:00:120
121390ksoftirqd/1121550irq/30-eth0_g0_10:44:580
121390ksoftirqd/1121550irq/30-eth0_g0_10:43:450
121390ksoftirqd/1121550irq/30-eth0_g0_10:31:060
121390ksoftirqd/1121550irq/30-eth0_g0_10:25:570
121390ksoftirqd/1121550irq/30-eth0_g0_09:21:150
121390ksoftirqd/1121550irq/30-eth0_g0_09:10:140
121390ksoftirqd/1121550irq/30-eth0_g0_08:57:410
121390ksoftirqd/1121550irq/30-eth0_g0_07:54:380
121390ksoftirqd/1121450irq/29-eth0_g0_09:55:101
121390ksoftirqd/1121450irq/29-eth0_g0_09:35:291
121390ksoftirqd/1121450irq/29-eth0_g0_08:48:331
121390ksoftirqd/1121450irq/29-eth0_g0_07:38:181
121390ksoftirqd/1121450irq/29-eth0_g0_07:38:181
556299381cyclictest8800-21sed07:20:121
121550380irq/30-eth0_g0_29990-21open_files11:00:081
121550380irq/30-eth0_g0_1221-21kworker/1:210:44:331
121550380irq/30-eth0_g0_121ksoftirqd/111:14:511
121550380irq/30-eth0_g0_121ksoftirqd/107:15:111
121550380irq/30-eth0_g0_0-21swapper/112:25:131
121450380irq/29-eth0_g0_6283-21unixbench_multi07:10:110
121450380irq/29-eth0_g0_556199cyclictest11:05:290
121450380irq/29-eth0_g0_1941-21runrttasks09:26:360
121450380irq/29-eth0_g0_1941-21runrttasks08:52:460
121450380irq/29-eth0_g0_1941-21runrttasks08:33:020
121450380irq/29-eth0_g0_15369-21latency_hist07:49:510
121450380irq/29-eth0_g0_14168-21latency_hist07:44:520
121450380irq/29-eth0_g0_13-21kworker/0:112:36:460
121380ksoftirqd/1121550irq/30-eth0_g0_12:25:180
121380ksoftirqd/1121550irq/30-eth0_g0_12:20:270
121380ksoftirqd/1121550irq/30-eth0_g0_09:09:070
121380ksoftirqd/1121550irq/30-eth0_g0_08:08:230
121380ksoftirqd/1121450irq/29-eth0_g0_11:26:451
121380ksoftirqd/1121450irq/29-eth0_g0_11:26:451
556299371cyclictest19407-21runrttasks10:16:421
121550370irq/30-eth0_g0_1221-21kworker/1:212:11:521
121550370irq/30-eth0_g0_1221-21kworker/1:210:05:051
121450370irq/29-eth0_g0_1941-21runrttasks08:01:230
556299361cyclictest9788-21proc_pri07:25:081
556299361cyclictest6355-21unixbench_singl07:10:111
556299361cyclictest2533-21diskmemload09:10:011
556299361cyclictest23478-21unixbench_singl08:20:121
556299361cyclictest16944-21cat07:55:061
121550360irq/30-eth0_g0_1221-21kworker/1:212:21:091
121450360irq/29-eth0_g0_7517-21tail07:15:120
121450360irq/29-eth0_g0_1941-21runrttasks08:49:440
121450360irq/29-eth0_g0_1941-21runrttasks08:42:450
121450360irq/29-eth0_g0_1941-21runrttasks08:34:570
121450360irq/29-eth0_g0_1941-21runrttasks08:26:450
121450360irq/29-eth0_g0_1941-21runrttasks08:26:450
121450360irq/29-eth0_g0_1941-21runrttasks08:10:370
121450360irq/29-eth0_g0_17305-21sed07:55:120
121450360irq/29-eth0_g0_121ksoftirqd/109:51:131
556299351cyclictest25774-21find08:30:091
556299351cyclictest155182sleep107:50:041
121450350irq/29-eth0_g0_27109-21unixbench_multi08:35:121
121450350irq/29-eth0_g0_23067-21latency08:20:050
121450350irq/29-eth0_g0_1941-21runrttasks07:27:180
121450350irq/29-eth0_g0_121ksoftirqd/108:05:131
121350ksoftirqd/1121550irq/30-eth0_g0_08:14:570
121350ksoftirqd/1121550irq/30-eth0_g0_07:29:590
556299342cyclictest27923-21iostat08:40:041
556299341cyclictest0-21swapper/107:44:381
556299331cyclictest0-21swapper/108:50:081
121450320irq/29-eth0_g0_556299cyclictest08:15:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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