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2026-06-18 - 20:27

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 Thu Jun 18, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121930ksoftirqd/1121750irq/30-eth0_g0_09:14:091
121890ksoftirqd/1121750irq/30-eth0_g0_09:55:041
121880ksoftirqd/1121750irq/30-eth0_g0_10:49:271
121850ksoftirqd/1121750irq/30-eth0_g0_07:55:281
61382790sleep1121650irq/29-eth0_g0_10:32:421
312292740sleep0121750irq/30-eth0_g0_10:02:520
187302720sleep1121750irq/30-eth0_g0_09:09:531
121660ksoftirqd/1121750irq/30-eth0_g0_12:10:040
160262580sleep0121750irq/30-eth0_g0_11:13:450
124492580chrt121750irq/30-eth0_g0_10:58:590
74142550sleep1121750irq/30-eth0_g0_10:38:191
29462550sleep1121650irq/29-eth0_g0_12:30:541
121530ksoftirqd/1121750irq/30-eth0_g0_10:27:101
193362510chrt121750irq/30-eth0_g0_11:24:280
193362510chrt121750irq/30-eth0_g0_11:24:280
121480ksoftirqd/1121750irq/30-eth0_g0_12:10:291
121480ksoftirqd/1121750irq/30-eth0_g0_09:49:531
121470ksoftirqd/1121750irq/30-eth0_g0_09:39:121
121470ksoftirqd/1121650irq/29-eth0_g0_10:41:370
121470ksoftirqd/1121650irq/29-eth0_g0_10:41:370
121460ksoftirqd/1121750irq/30-eth0_g0_11:26:031
121460ksoftirqd/1121750irq/30-eth0_g0_11:26:031
121460ksoftirqd/1121650irq/29-eth0_g0_07:53:581
121650450irq/29-eth0_g0_1964-21runrttasks07:05:300
121450ksoftirqd/1121650irq/29-eth0_g0_11:49:331
121450ksoftirqd/1121650irq/29-eth0_g0_11:33:421
121650440irq/29-eth0_g0_31ksoftirqd/008:49:180
121440ksoftirqd/1121750irq/30-eth0_g0_12:06:021
11072440sleep0121650irq/29-eth0_g0_10:11:250
121750430irq/30-eth0_g0_1367-21zcat12:24:181
121750430irq/30-eth0_g0_1219-21kworker/1:211:59:191
121750430irq/30-eth0_g0_1219-21kworker/1:210:22:331
121430ksoftirqd/1121750irq/30-eth0_g0_08:13:400
121750420irq/30-eth0_g0_12226-21runrttasks08:44:140
121750420irq/30-eth0_g0_121ksoftirqd/110:54:201
121750420irq/30-eth0_g0_121ksoftirqd/110:04:131
121750420irq/30-eth0_g0_121ksoftirqd/110:04:131
121750420irq/30-eth0_g0_121ksoftirqd/109:37:231
121420ksoftirqd/1121750irq/30-eth0_g0_12:03:530
121420ksoftirqd/1121650irq/29-eth0_g0_12:15:251
42402410sleep1121750irq/30-eth0_g0_12:36:461
2089999411cyclictest24981-21missed_timers07:24:151
121750410irq/30-eth0_g0_1219-21kworker/1:211:01:591
121650410irq/29-eth0_g0_31ksoftirqd/011:43:390
121650410irq/29-eth0_g0_13-21kworker/0:110:21:560
121750400irq/30-eth0_g0_31ksoftirqd/012:08:490
121750400irq/30-eth0_g0_1219-21kworker/1:211:04:511
121750400irq/30-eth0_g0_1219-21kworker/1:210:44:371
121750400irq/30-eth0_g0_121ksoftirqd/109:33:391
121650400irq/29-eth0_g0_31ksoftirqd/011:53:510
121650400irq/29-eth0_g0_31ksoftirqd/011:14:180
121650400irq/29-eth0_g0_31ksoftirqd/010:24:100
121650400irq/29-eth0_g0_1964-21runrttasks12:17:100
121650400irq/29-eth0_g0_13-21kworker/0:110:49:440
121650400irq/29-eth0_g0_121ksoftirqd/110:30:110
2089999391cyclictest21760-21df_abs09:24:091
121750390irq/30-eth0_g0_23698-21interrupts11:44:111
121750390irq/30-eth0_g0_2363-21seq10:16:261
121750390irq/30-eth0_g0_0-21swapper/110:03:181
121650390irq/29-eth0_g0_31ksoftirqd/011:36:140
121650390irq/29-eth0_g0_2089899cyclictest09:29:210
121650390irq/29-eth0_g0_13-21kworker/0:110:15:320
121650390irq/29-eth0_g0_13-21kworker/0:110:05:130
121650390irq/29-eth0_g0_13-21kworker/0:110:05:130
121650390irq/29-eth0_g0_13-21kworker/0:109:50:310
121390ksoftirqd/120789-21runrttasks07:07:511
121390ksoftirqd/1121750irq/30-eth0_g0_12:35:370
121390ksoftirqd/1121750irq/30-eth0_g0_12:26:000
121390ksoftirqd/1121750irq/30-eth0_g0_11:44:440
121390ksoftirqd/1121750irq/30-eth0_g0_11:30:030
121390ksoftirqd/1121750irq/30-eth0_g0_11:07:280
121390ksoftirqd/1121750irq/30-eth0_g0_10:57:230
121390ksoftirqd/1121750irq/30-eth0_g0_10:48:270
121390ksoftirqd/1121750irq/30-eth0_g0_09:54:350
121390ksoftirqd/1121750irq/30-eth0_g0_09:24:220
121390ksoftirqd/1121750irq/30-eth0_g0_09:19:470
121390ksoftirqd/1121750irq/30-eth0_g0_09:18:050
121390ksoftirqd/1121750irq/30-eth0_g0_09:11:520
121390ksoftirqd/1121750irq/30-eth0_g0_09:08:250
121390ksoftirqd/1121750irq/30-eth0_g0_08:41:290
121390ksoftirqd/1121750irq/30-eth0_g0_08:33:220
121390ksoftirqd/1121750irq/30-eth0_g0_08:25:550
121390ksoftirqd/1121750irq/30-eth0_g0_08:20:100
121390ksoftirqd/1121750irq/30-eth0_g0_08:15:140
121390ksoftirqd/1121750irq/30-eth0_g0_08:15:140
121390ksoftirqd/1121750irq/30-eth0_g0_08:04:490
121390ksoftirqd/1121750irq/30-eth0_g0_07:46:310
121390ksoftirqd/1121650irq/29-eth0_g0_08:49:091
2089999381cyclictest881-21sed10:09:191
2089999381cyclictest298462sleep107:44:131
2089999381cyclictest21652-21/usr/sbin/munin07:09:191
121750380irq/30-eth0_g0_1219-21kworker/1:211:56:471
121750380irq/30-eth0_g0_121ksoftirqd/111:35:451
121750380irq/30-eth0_g0_121ksoftirqd/111:09:181
121750380irq/30-eth0_g0_121ksoftirqd/110:40:091
121750380irq/30-eth0_g0_121ksoftirqd/110:40:091
121650380irq/29-eth0_g0_31ksoftirqd/010:37:220
121650380irq/29-eth0_g0_1964-21runrttasks09:40:070
121650380irq/29-eth0_g0_13-21kworker/0:112:19:080
121650380irq/29-eth0_g0_13-21kworker/0:111:23:460
121650380irq/29-eth0_g0_13-21kworker/0:109:46:040
121650380irq/29-eth0_g0_13-21kworker/0:109:38:360
121650380irq/29-eth0_g0_121ksoftirqd/111:55:290
121380ksoftirqd/1121750irq/30-eth0_g0_08:00:530
2089999373cyclictest1983-21/usr/sbin/munin07:22:441
2089999372cyclictest14671-21ntpq08:54:151
2089999372cyclictest14671-21ntpq08:54:151
2089999372cyclictest0-21swapper/107:14:171
2089999371cyclictest32368-21cat12:19:111
121750370irq/30-eth0_g0_1219-21kworker/1:211:40:561
121750370irq/30-eth0_g0_1219-21kworker/1:211:19:091
121750370irq/30-eth0_g0_1219-21kworker/1:208:44:191
121650370irq/29-eth0_g0_31302-21processes07:49:190
121650370irq/29-eth0_g0_29469-21latency_hist07:43:580
121650370irq/29-eth0_g0_1964-21runrttasks12:29:230
117450370irq/72-mmc0121ksoftirqd/107:35:011
2089999362cyclictest8226-21grep08:29:081
2089999362cyclictest3721-21proc_pri08:09:171
2089999361cyclictest26928-21/usr/sbin/munin09:44:131
121750360irq/30-eth0_g0_1355-21/usr/sbin/munin07:59:171
121750360irq/30-eth0_g0_1219-21kworker/1:211:14:261
121650360irq/29-eth0_g0_9978-21timerandwakeup08:34:180
121360ksoftirqd/1121750irq/30-eth0_g0_07:56:050
121360ksoftirqd/1121750irq/30-eth0_g0_07:22:200
2089999352cyclictest5763-21df08:19:091
2089999351cyclictest6956-21cpu08:24:091
2089999351cyclictest17855-21diskmemload09:19:201
2089999351cyclictest10979-21netstat08:39:131
121650350irq/29-eth0_g0_27514-21ntpq07:34:160
121650350irq/29-eth0_g0_26147-21taskset07:29:120
121650350irq/29-eth0_g0_21628-21unixbench_multi07:09:190
121650350irq/29-eth0_g0_1964-21runrttasks07:26:580
121650350irq/29-eth0_g0_1964-21runrttasks07:17:340
121650350irq/29-eth0_g0_0-21swapper/008:54:120
121650350irq/29-eth0_g0_0-21swapper/008:54:120
121350ksoftirqd/1121750irq/30-eth0_g0_09:03:260
2089999341cyclictest1964-21runrttasks07:33:321
121750340irq/30-eth0_g0_16851-21df_abs09:04:091
121650340irq/29-eth0_g0_3162-21munin-run08:08:581
2089999331cyclictest5153-21unixbench_singl08:14:191
2089999331cyclictest5153-21unixbench_singl08:14:191
2089999331cyclictest28858-21zcat07:39:181
121750330irq/30-eth0_g0_15733-21taskset08:59:101
2089999321cyclictest0-21swapper/108:34:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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