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2026-04-13 - 18:59

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 Mon Apr 13, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3010721640chrt3129650irq/29-eth0_g0_09:17:071
230192940sleep13129650irq/29-eth0_g0_10:59:341
27892790sleep13129750irq/30-eth0_g0_09:39:161
121790ksoftirqd/13129750irq/30-eth0_g0_09:19:360
121740ksoftirqd/13129750irq/30-eth0_g0_08:09:260
121640ksoftirqd/13129750irq/30-eth0_g0_07:04:261
141302620sleep03129650irq/29-eth0_g0_12:34:540
21782600sleep03129750irq/30-eth0_g0_11:48:270
24212590sleep03129750irq/30-eth0_g0_09:35:020
174102570sleep03129650irq/29-eth0_g0_10:38:160
121510ksoftirqd/13129750irq/30-eth0_g0_11:23:391
98882500sleep03129650irq/29-eth0_g0_12:19:290
143682500sleep13129750irq/30-eth0_g0_12:37:411
121490ksoftirqd/13129750irq/30-eth0_g0_10:47:451
121470ksoftirqd/13129750irq/30-eth0_g0_09:13:541
3129650460irq/29-eth0_g0_15537-21ntp_offset10:29:350
121460ksoftirqd/13129650irq/29-eth0_g0_12:26:291
121460ksoftirqd/13129650irq/29-eth0_g0_12:26:291
121460ksoftirqd/13129650irq/29-eth0_g0_12:21:351
323892450sleep03129650irq/29-eth0_g0_09:25:020
174792450sleep13129750irq/30-eth0_g0_10:39:051
121450ksoftirqd/13129650irq/29-eth0_g0_07:34:121
3129750440irq/30-eth0_g0_31295-21kworker/1:111:42:051
3129650440irq/29-eth0_g0_6249-21ntp_offset07:39:320
3129650440irq/29-eth0_g0_30340-21unixbench_multi07:04:350
121440ksoftirqd/13129750irq/30-eth0_g0_12:33:111
3129750430irq/30-eth0_g0_31295-21kworker/1:109:50:421
3129750430irq/30-eth0_g0_31295-21kworker/1:109:26:171
3083299431cyclictest27841-21diskmemload10:54:311
121430ksoftirqd/13129750irq/30-eth0_g0_10:03:441
121430ksoftirqd/13129650irq/29-eth0_g0_10:59:410
3129750420irq/30-eth0_g0_31295-21kworker/1:111:56:451
3129650420irq/29-eth0_g0_121ksoftirqd/111:14:340
129362420sleep03129650irq/29-eth0_g0_12:30:150
121420ksoftirqd/13129650irq/29-eth0_g0_11:44:301
121420ksoftirqd/13129650irq/29-eth0_g0_10:54:310
3129750410irq/30-eth0_g0_121ksoftirqd/110:09:301
3129650410irq/29-eth0_g0_31ksoftirqd/011:58:450
3129650410irq/29-eth0_g0_13-21kworker/0:111:36:510
3129650410irq/29-eth0_g0_13-21kworker/0:110:43:080
3129650410irq/29-eth0_g0_13-21kworker/0:110:13:220
3129650410irq/29-eth0_g0_13-21kworker/0:110:02:460
3129650410irq/29-eth0_g0_13-21kworker/0:109:29:200
27162410chrt3129650irq/29-eth0_g0_11:49:320
3129750400irq/30-eth0_g0_121ksoftirqd/112:15:161
3129750400irq/30-eth0_g0_121ksoftirqd/111:17:531
3129750400irq/30-eth0_g0_121ksoftirqd/111:04:431
3129750400irq/30-eth0_g0_121ksoftirqd/109:24:021
3129750400irq/30-eth0_g0_10373-21seq07:55:501
3129650400irq/29-eth0_g0_5392-21df09:49:270
3129650400irq/29-eth0_g0_31ksoftirqd/009:48:160
3129650400irq/29-eth0_g0_31ksoftirqd/009:48:160
3129650400irq/29-eth0_g0_31ksoftirqd/009:41:540
3129650400irq/29-eth0_g0_23957-21irqstats11:04:300
3129650400irq/29-eth0_g0_13-21kworker/0:111:39:500
3129650400irq/29-eth0_g0_13-21kworker/0:111:32:280
3129650400irq/29-eth0_g0_13-21kworker/0:110:46:370
3129650400irq/29-eth0_g0_13-21kworker/0:109:58:060
3129650400irq/29-eth0_g0_13-21kworker/0:109:14:210
3129650400irq/29-eth0_g0_121ksoftirqd/111:50:531
121400ksoftirqd/13129650irq/29-eth0_g0_09:57:081
121400ksoftirqd/13129650irq/29-eth0_g0_07:09:361
3129750390irq/30-eth0_g0_31295-21kworker/1:110:40:191
3129750390irq/30-eth0_g0_31295-21kworker/1:110:23:421
3129750390irq/30-eth0_g0_31295-21kworker/1:109:29:271
3129750390irq/30-eth0_g0_121ksoftirqd/111:59:331
3129650390irq/29-eth0_g0_6304-21load12:04:280
3129650390irq/29-eth0_g0_31295-21kworker/1:110:15:161
3129650390irq/29-eth0_g0_31ksoftirqd/009:10:180
3129650390irq/29-eth0_g0_31ksoftirqd/007:34:260
3129650390irq/29-eth0_g0_1875-21runrttasks08:55:000
3129650390irq/29-eth0_g0_1875-21runrttasks08:55:000
3129650390irq/29-eth0_g0_13-21kworker/0:112:16:020
3129650390irq/29-eth0_g0_13-21kworker/0:111:25:500
3129650390irq/29-eth0_g0_13-21kworker/0:111:25:500
3129650390irq/29-eth0_g0_13-21kworker/0:110:17:180
3129650390irq/29-eth0_g0_121ksoftirqd/108:39:061
3083299392cyclictest8964-21unixbench_multi07:49:371
3083299391cyclictest30434-21grep11:29:361
3083299391cyclictest29009-21awk11:24:321
3083299391cyclictest29009-21awk11:24:321
121390ksoftirqd/13129750irq/30-eth0_g0_12:04:060
121390ksoftirqd/13129650irq/29-eth0_g0_11:11:151
121390ksoftirqd/13129650irq/29-eth0_g0_10:08:251
121390ksoftirqd/13129650irq/29-eth0_g0_08:59:301
121390ksoftirqd/13129650irq/29-eth0_g0_08:59:301
121390ksoftirqd/13129650irq/29-eth0_g0_08:53:141
121390ksoftirqd/13129650irq/29-eth0_g0_08:10:331
3129750380irq/30-eth0_g0_17433-21sendmail_mailqu08:24:341
3129750380irq/30-eth0_g0_14453-21wc10:24:351
3129750380irq/30-eth0_g0_121ksoftirqd/110:51:501
3129750380irq/30-eth0_g0_0-21swapper/112:04:311
3129650380irq/29-eth0_g0_31ksoftirqd/012:24:270
3129650380irq/29-eth0_g0_31ksoftirqd/012:24:270
3129650380irq/29-eth0_g0_13-21kworker/0:110:21:300
3129650380irq/29-eth0_g0_13-21kworker/0:110:04:460
3083299382cyclictest15538-21ntp_offset10:29:351
3083299381cyclictest217962sleep108:44:241
121380ksoftirqd/13129650irq/29-eth0_g0_11:36:421
121380ksoftirqd/13129650irq/29-eth0_g0_07:15:251
3129750370irq/30-eth0_g0_0-21swapper/112:10:121
3129650370irq/29-eth0_g0_7775-21sendmail_mailqu12:09:350
3129650370irq/29-eth0_g0_7456-21netstat07:44:310
3129650370irq/29-eth0_g0_3476-21df07:29:260
3129650370irq/29-eth0_g0_28169-21runrttasks11:20:030
3129650370irq/29-eth0_g0_13-21kworker/0:110:49:320
3083299372cyclictest3120-21/usr/sbin/munin09:39:301
3083299371cyclictest2846-21sed07:24:371
3129750360irq/30-eth0_g0_31295-21kworker/1:109:44:281
3129750360irq/30-eth0_g0_31295-21kworker/1:109:44:281
3129650360irq/29-eth0_g0_31ksoftirqd/008:50:170
3129650360irq/29-eth0_g0_25795-21cat08:59:300
3129650360irq/29-eth0_g0_25795-21cat08:59:300
3129650360irq/29-eth0_g0_20960-21ntp_offset08:39:320
3129650360irq/29-eth0_g0_1875-21runrttasks07:11:550
3129650360irq/29-eth0_g0_0-21swapper/011:09:470
3083299362cyclictest11418-21unixbench_multi07:59:371
3083299361cyclictest20823-21sort08:39:291
3083299361cyclictest151772sleep108:14:381
121360ksoftirqd/13129650irq/29-eth0_g0_07:38:291
3129750350irq/30-eth0_g0_13183-21latency_hist08:09:161
3129650350irq/29-eth0_g0_894-21latency_hist07:19:160
3129650350irq/29-eth0_g0_1875-21runrttasks08:38:000
3129650350irq/29-eth0_g0_1875-21runrttasks08:20:040
3129650350irq/29-eth0_g0_1875-21runrttasks07:27:360
3129650350irq/29-eth0_g0_14978-21sendmail_mailqu08:14:360
3129650350irq/29-eth0_g0_1469-21rt-features07:19:350
3129650350irq/29-eth0_g0_13-21kworker/0:110:24:490
30832993520cyclictest6153-21memory07:39:311
3083299351cyclictest1580-21grep07:19:371
3129650340irq/29-eth0_g0_9918-21ntpdc07:54:320
3129650340irq/29-eth0_g0_9045-21awk07:49:380
3129650340irq/29-eth0_g0_3083299cyclictest08:20:431
3129650340irq/29-eth0_g0_27080-21ntp_kernel_err09:04:320
3129650340irq/29-eth0_g0_22097-21runrttasks08:44:290
3129650340irq/29-eth0_g0_12400-21open_files08:04:330
3083299341cyclictest27374-21grep09:04:371
3083299341cyclictest24718-21proc_pri08:54:351
3083299341cyclictest24718-21proc_pri08:54:351
3083299341cyclictest18192-21df08:29:291
3083299341cyclictest0-21swapper/107:44:371
3129650330irq/29-eth0_g0_16963-21df08:24:260
3129650320irq/29-eth0_g0_1875-21runrttasks08:02:380
3129650320irq/29-eth0_g0_18499-21/usr/sbin/munin08:29:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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