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2026-06-29 - 22:08

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 Jun 29, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1265221360sleep1121750irq/30-eth0_g0_10:38:511
1211320ksoftirqd/1121750irq/30-eth0_g0_10:03:591
3112121190sleep0121750irq/30-eth0_g0_09:43:270
121970ksoftirqd/1121750irq/30-eth0_g0_11:30:471
121730ksoftirqd/1121750irq/30-eth0_g0_10:23:111
121710ksoftirqd/1121750irq/30-eth0_g0_11:58:111
251012690sleep0121750irq/30-eth0_g0_09:18:400
38952560sleep0121650irq/29-eth0_g0_12:14:480
121520ksoftirqd/1121650irq/29-eth0_g0_09:16:551
121510ksoftirqd/1121750irq/30-eth0_g0_09:24:351
121460ksoftirqd/1121750irq/30-eth0_g0_12:32:211
121460ksoftirqd/1121750irq/30-eth0_g0_11:42:011
121460ksoftirqd/1121750irq/30-eth0_g0_10:49:091
121460ksoftirqd/1121750irq/30-eth0_g0_09:49:071
121460ksoftirqd/1121650irq/29-eth0_g0_11:52:141
121650450irq/29-eth0_g0_0-21swapper/007:08:300
121450ksoftirqd/1121750irq/30-eth0_g0_11:09:251
121450ksoftirqd/1121750irq/30-eth0_g0_10:12:011
121450ksoftirqd/1121750irq/30-eth0_g0_09:56:541
121450ksoftirqd/1121750irq/30-eth0_g0_09:21:491
121450ksoftirqd/1121650irq/29-eth0_g0_12:38:180
2568099441cyclictest168672sleep108:43:461
121440ksoftirqd/1121650irq/29-eth0_g0_12:36:511
121440ksoftirqd/1121650irq/29-eth0_g0_12:15:551
121440ksoftirqd/1121650irq/29-eth0_g0_10:16:391
121440ksoftirqd/1121650irq/29-eth0_g0_10:02:211
257132430sleep0121750irq/30-eth0_g0_11:33:340
2568099432cyclictest11695-21egrep08:23:411
121750430irq/30-eth0_g0_5917-21/usr/sbin/munin12:23:471
121650430irq/29-eth0_g0_31ksoftirqd/007:08:490
121430ksoftirqd/1121650irq/29-eth0_g0_11:03:461
121430ksoftirqd/1121650irq/29-eth0_g0_09:02:321
121750420irq/30-eth0_g0_1219-21kworker/1:212:06:091
121650420irq/29-eth0_g0_31ksoftirqd/011:22:430
121750410irq/30-eth0_g0_121ksoftirqd/112:18:461
121650410irq/29-eth0_g0_29103-21runrttasks11:46:140
121410ksoftirqd/1121750irq/30-eth0_g0_11:14:531
121410ksoftirqd/1121650irq/29-eth0_g0_12:13:271
121750400irq/30-eth0_g0_1219-21kworker/1:209:47:271
121750400irq/30-eth0_g0_0-21swapper/110:28:421
121650400irq/29-eth0_g0_31ksoftirqd/010:08:510
121650400irq/29-eth0_g0_31ksoftirqd/009:34:070
121650400irq/29-eth0_g0_13-21kworker/0:111:55:330
121650400irq/29-eth0_g0_13-21kworker/0:111:31:060
121650400irq/29-eth0_g0_13-21kworker/0:110:46:080
121650400irq/29-eth0_g0_13-21kworker/0:110:31:160
121650400irq/29-eth0_g0_13-21kworker/0:110:27:000
121650400irq/29-eth0_g0_13-21kworker/0:110:27:000
121650400irq/29-eth0_g0_13-21kworker/0:110:17:090
121650400irq/29-eth0_g0_13-21kworker/0:109:54:530
121650400irq/29-eth0_g0_121ksoftirqd/110:58:170
121650400irq/29-eth0_g0_121ksoftirqd/109:09:340
121750390irq/30-eth0_g0_0-21swapper/111:21:191
121650390irq/29-eth0_g0_31ksoftirqd/011:52:440
121650390irq/29-eth0_g0_31ksoftirqd/010:39:210
121650390irq/29-eth0_g0_13-21kworker/0:112:04:010
121650390irq/29-eth0_g0_13-21kworker/0:111:41:550
121650390irq/29-eth0_g0_13-21kworker/0:110:03:450
121390ksoftirqd/1121750irq/30-eth0_g0_12:20:240
121390ksoftirqd/1121750irq/30-eth0_g0_12:01:480
121390ksoftirqd/1121750irq/30-eth0_g0_08:07:540
121390ksoftirqd/1121650irq/29-eth0_g0_11:00:191
121390ksoftirqd/1121650irq/29-eth0_g0_08:18:311
2568099381cyclictest5032-21unixbench_singl07:53:531
2568099381cyclictest29912-21latency_hist09:38:311
2568099381cyclictest27674-21unixbench_singl07:13:531
121750380irq/30-eth0_g0_121ksoftirqd/109:32:041
121750380irq/30-eth0_g0_0-21swapper/107:58:441
121750380irq/30-eth0_g0_0-21swapper/107:58:441
121650380irq/29-eth0_g0_1964-21runrttasks07:37:110
121650380irq/29-eth0_g0_182882sleep011:03:300
121650380irq/29-eth0_g0_13-21kworker/0:112:23:470
121650380irq/29-eth0_g0_13-21kworker/0:111:09:290
121650380irq/29-eth0_g0_13-21kworker/0:111:04:370
121650380irq/29-eth0_g0_11992sleep007:38:520
121380ksoftirqd/1121750irq/30-eth0_g0_09:52:270
121380ksoftirqd/1121750irq/30-eth0_g0_09:46:150
121380ksoftirqd/1121750irq/30-eth0_g0_07:53:070
121380ksoftirqd/1121650irq/29-eth0_g0_10:33:431
121380ksoftirqd/1121650irq/29-eth0_g0_07:38:461
2568099372cyclictest2109-21lldpd11:23:431
2568099372cyclictest163382sleep110:53:491
2568099371cyclictest9279-21sed10:23:531
2568099371cyclictest9279-21sed10:23:531
2568099371cyclictest28851-21grep11:43:541
2568099371cyclictest26420-21tail07:08:531
121750370irq/30-eth0_g0_2568099cyclictest09:38:451
121650370irq/29-eth0_g0_31ksoftirqd/012:12:140
121650370irq/29-eth0_g0_28849-21unixbench_multi07:18:540
121650370irq/29-eth0_g0_28849-21unixbench_multi07:18:540
121650370irq/29-eth0_g0_28688-21cat09:33:320
121650370irq/29-eth0_g0_20876-21grep08:58:510
121650370irq/29-eth0_g0_19695-21unixbench_singl08:53:540
121650370irq/29-eth0_g0_14776-21sed08:33:540
121650370irq/29-eth0_g0_13-21kworker/0:110:36:350
121650370irq/29-eth0_g0_13-21kworker/0:110:22:260
121650370irq/29-eth0_g0_13-21kworker/0:109:24:270
121650370irq/29-eth0_g0_13-21kworker/0:109:15:210
121650370irq/29-eth0_g0_12405-21uptime08:23:520
2568099362cyclictest28903-21unixbench_singl07:18:541
2568099362cyclictest28903-21unixbench_singl07:18:541
2568099361cyclictest8246-21taskset08:08:461
2568099361cyclictest32528-21unixbench_singl11:58:561
2568099361cyclictest25712-21cat07:08:311
121750360irq/30-eth0_g0_1219-21kworker/1:211:37:251
121650360irq/29-eth0_g0_9702-21proc_pri08:13:500
121650360irq/29-eth0_g0_31ksoftirqd/011:25:340
121650360irq/29-eth0_g0_27374-21ntpdc07:13:480
121650360irq/29-eth0_g0_2606-21seq09:58:430
121650360irq/29-eth0_g0_22287-21sshd09:05:100
121650360irq/29-eth0_g0_16045-21unixbench_singl08:38:490
121650360irq/29-eth0_g0_13557-21unixbench_multi08:28:500
121650360irq/29-eth0_g0_13-21kworker/0:112:29:410
121650360irq/29-eth0_g0_13-21kworker/0:111:16:500
2568099356cyclictest121750irq/30-eth0_g0_09:08:461
2568099351cyclictest7480-21head08:03:531
2568099351cyclictest4265-21cat07:53:311
2568099351cyclictest31033-21/usr/sbin/munin07:28:481
2568099351cyclictest137232sleep110:43:461
2568099351cyclictest132882sleep108:28:451
2568099351cyclictest11090-21grep08:18:511
2568099351cyclictest0-21swapper/108:52:491
2568099351cyclictest0-21swapper/108:52:491
2568099351cyclictest0-21swapper/107:46:001
121650350irq/29-eth0_g0_1964-21runrttasks08:45:260
121650350irq/29-eth0_g0_1964-21runrttasks08:18:470
121650350irq/29-eth0_g0_18637-21sshd08:50:110
121650350irq/29-eth0_g0_18637-21sshd08:50:110
121350ksoftirqd/1121750irq/30-eth0_g0_07:54:570
2568099341cyclictest32567-21grep07:33:531
2568099341cyclictest22040-21sed09:03:531
2568099341cyclictest0-21swapper/107:23:391
121650340irq/29-eth0_g0_31203-21sendmail_mailst07:28:520
121650340irq/29-eth0_g0_2179-21sort07:43:430
121650340irq/29-eth0_g0_1964-21runrttasks10:48:590
121650340irq/29-eth0_g0_1964-21runrttasks08:01:350
121650340irq/29-eth0_g0_1964-21runrttasks08:01:350
121650340irq/29-eth0_g0_1964-21runrttasks07:26:110
121340ksoftirqd/1121750irq/30-eth0_g0_08:53:481
121650330irq/29-eth0_g0_8410-21runrttasks08:08:490
121650330irq/29-eth0_g0_16031-21unixbench_singl08:38:491
2568099321cyclictest0-21swapper/108:35:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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