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2026-03-23 - 15:29

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 Mar 23, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1718821720sleep1121650irq/29-eth0_g0_23:11:181
276982760sleep1121650irq/29-eth0_g0_21:42:201
28372710sleep1121750irq/30-eth0_g0_19:59:511
24642700chrt121750irq/30-eth0_g0_19:59:430
121690ksoftirqd/131242sleep000:26:180
121660ksoftirqd/1121650irq/29-eth0_g0_20:29:501
294902640sleep1121750irq/30-eth0_g0_21:49:471
183322620sleep1121650irq/29-eth0_g0_23:15:241
222372590sleep0121650irq/29-eth0_g0_23:33:050
296452520sleep1121650irq/29-eth0_g0_00:03:501
121500ksoftirqd/1121750irq/30-eth0_g0_00:25:021
121650470irq/29-eth0_g0_3526-21unixbench_multi22:14:520
121650470irq/29-eth0_g0_3526-21unixbench_multi22:14:520
121470ksoftirqd/1121750irq/30-eth0_g0_21:13:011
121750450irq/30-eth0_g0_121ksoftirqd/121:04:481
121450ksoftirqd/1121650irq/29-eth0_g0_22:28:151
121450ksoftirqd/1121650irq/29-eth0_g0_00:20:201
121450ksoftirqd/1121650irq/29-eth0_g0_00:20:201
74942440sleep0121750irq/30-eth0_g0_22:32:160
121650440irq/29-eth0_g0_13-21kworker/0:123:37:450
121440ksoftirqd/1121650irq/29-eth0_g0_21:37:351
121430ksoftirqd/1121750irq/30-eth0_g0_21:19:561
121430ksoftirqd/1121750irq/30-eth0_g0_21:09:350
88422420sleep0121750irq/30-eth0_g0_22:38:450
2241099421cyclictest23814-21df_abs23:39:421
121750420irq/30-eth0_g0_20999-21/usr/sbin/munin21:14:451
121650420irq/29-eth0_g0_31ksoftirqd/023:54:060
121420ksoftirqd/1121750irq/30-eth0_g0_22:00:080
121420ksoftirqd/1121750irq/30-eth0_g0_21:44:320
121650410irq/29-eth0_g0_13-21kworker/0:123:47:520
121650410irq/29-eth0_g0_13-21kworker/0:123:22:100
121650410irq/29-eth0_g0_13-21kworker/0:100:18:100
121650410irq/29-eth0_g0_0-21swapper/022:39:480
121410ksoftirqd/1121750irq/30-eth0_g0_21:26:590
121410ksoftirqd/1121650irq/29-eth0_g0_21:55:561
2241099401cyclictest28074-21head19:29:521
121750400irq/30-eth0_g0_470-21kworker/1:123:51:581
121750400irq/30-eth0_g0_470-21kworker/1:122:30:581
121750400irq/30-eth0_g0_470-21kworker/1:100:10:201
121750400irq/30-eth0_g0_21924-21unixbench_multi19:04:511
121750400irq/30-eth0_g0_18414-21iostat21:04:460
121750400irq/30-eth0_g0_121ksoftirqd/120:39:451
121650400irq/29-eth0_g0_31ksoftirqd/022:45:050
121650400irq/29-eth0_g0_2029-21runrttasks21:04:210
121650400irq/29-eth0_g0_13-21kworker/0:123:26:180
121650400irq/29-eth0_g0_13-21kworker/0:123:17:440
121650400irq/29-eth0_g0_13-21kworker/0:122:54:160
121650400irq/29-eth0_g0_13-21kworker/0:121:39:440
121650400irq/29-eth0_g0_13-21kworker/0:121:23:370
121650400irq/29-eth0_g0_13-21kworker/0:100:34:110
121650400irq/29-eth0_g0_121ksoftirqd/120:25:361
121650400irq/29-eth0_g0_0-21swapper/019:08:560
121400ksoftirqd/1121750irq/30-eth0_g0_23:58:550
121400ksoftirqd/1121750irq/30-eth0_g0_23:05:170
121400ksoftirqd/1121750irq/30-eth0_g0_22:56:060
121400ksoftirqd/1121750irq/30-eth0_g0_22:56:060
121400ksoftirqd/1121750irq/30-eth0_g0_00:34:530
121400ksoftirqd/1121650irq/29-eth0_g0_23:49:171
121400ksoftirqd/1121650irq/29-eth0_g0_23:30:031
121400ksoftirqd/1121650irq/29-eth0_g0_22:40:031
2241099391cyclictest14093-21ethtool22:59:431
121750390irq/30-eth0_g0_470-21kworker/1:121:59:521
121750390irq/30-eth0_g0_121ksoftirqd/123:21:371
121750390irq/30-eth0_g0_121ksoftirqd/122:10:241
121750390irq/30-eth0_g0_121ksoftirqd/122:08:181
121650390irq/29-eth0_g0_32350-21df_abs19:49:420
121650390irq/29-eth0_g0_30645-21iostat21:54:450
121650390irq/29-eth0_g0_30362-21find19:39:520
121650390irq/29-eth0_g0_2029-21runrttasks00:13:370
121650390irq/29-eth0_g0_13-21kworker/0:123:40:390
121650390irq/29-eth0_g0_13-21kworker/0:121:53:550
121650390irq/29-eth0_g0_13-21kworker/0:121:15:220
121390ksoftirqd/1121750irq/30-eth0_g0_23:09:360
121390ksoftirqd/1121750irq/30-eth0_g0_23:00:440
121390ksoftirqd/1121750irq/30-eth0_g0_22:29:180
121390ksoftirqd/1121750irq/30-eth0_g0_22:12:590
121390ksoftirqd/1121750irq/30-eth0_g0_21:35:280
121390ksoftirqd/1121750irq/30-eth0_g0_20:52:160
121390ksoftirqd/1121750irq/30-eth0_g0_20:52:160
121390ksoftirqd/1121750irq/30-eth0_g0_19:58:260
121390ksoftirqd/1121750irq/30-eth0_g0_19:45:310
121390ksoftirqd/1121750irq/30-eth0_g0_19:18:260
121390ksoftirqd/1121750irq/30-eth0_g0_00:22:370
121390ksoftirqd/1121750irq/30-eth0_g0_00:22:370
121390ksoftirqd/1121750irq/30-eth0_g0_00:06:070
121390ksoftirqd/1121650irq/29-eth0_g0_22:58:421
121390ksoftirqd/1121650irq/29-eth0_g0_22:58:421
121390ksoftirqd/1121650irq/29-eth0_g0_22:50:261
121390ksoftirqd/1121650irq/29-eth0_g0_22:48:121
121390ksoftirqd/1121650irq/29-eth0_g0_21:47:321
121390ksoftirqd/1121650irq/29-eth0_g0_20:21:211
121390ksoftirqd/1121650irq/29-eth0_g0_19:17:161
2241099382cyclictest310-21find00:14:491
2241099382cyclictest25592-21unixbench_multi19:19:531
2241099381cyclictest31575-21seq19:44:511
2241099381cyclictest242162sleep121:29:301
2241099381cyclictest1598-21find19:54:501
121750380irq/30-eth0_g0_484-21sed19:49:521
121750380irq/30-eth0_g0_470-21kworker/1:121:30:541
121750380irq/30-eth0_g0_121ksoftirqd/123:06:281
121750380irq/30-eth0_g0_121ksoftirqd/122:15:291
121750380irq/30-eth0_g0_121ksoftirqd/122:15:291
121650380irq/29-eth0_g0_9645-21/usr/sbin/munin20:29:420
121650380irq/29-eth0_g0_5374-21grep20:09:510
121650380irq/29-eth0_g0_5374-21grep20:09:510
121650380irq/29-eth0_g0_28091-21sed19:29:520
121650380irq/29-eth0_g0_25155-21sshd21:31:130
121650380irq/29-eth0_g0_2029-21runrttasks19:27:260
121650380irq/29-eth0_g0_13-21kworker/0:122:07:320
121650380irq/29-eth0_g0_13-21kworker/0:100:00:250
121380ksoftirqd/1121750irq/30-eth0_g0_20:41:260
121380ksoftirqd/1121650irq/29-eth0_g0_20:54:211
121380ksoftirqd/1121650irq/29-eth0_g0_20:54:211
121380ksoftirqd/1121650irq/29-eth0_g0_19:42:221
2241099371cyclictest7116-21latency_hist20:19:301
2241099371cyclictest4770-21unixbench_multi22:19:521
2241099371cyclictest173452sleep120:59:491
121750370irq/30-eth0_g0_470-21kworker/1:123:24:391
121750370irq/30-eth0_g0_470-21kworker/1:100:37:371
121750370irq/30-eth0_g0_30385-21timerandwakeup00:04:491
121650370irq/29-eth0_g0_13-21kworker/0:122:19:430
121650370irq/29-eth0_g0_121ksoftirqd/123:36:271
121370ksoftirqd/1121650irq/29-eth0_g0_20:54:471
2241099361cyclictest5456-21unixbench_singl20:09:511
2241099361cyclictest5456-21unixbench_singl20:09:511
2241099361cyclictest4167-21grep00:29:531
2241099361cyclictest0-21swapper/122:36:431
121750360irq/30-eth0_g0_23043-21sendmail_mailqu19:09:531
121650360irq/29-eth0_g0_7567-21netstat20:19:460
121650360irq/29-eth0_g0_121ksoftirqd/123:57:261
2241099351cyclictest29241-21grep19:34:511
2241099351cyclictest27298-21cat19:29:311
121750350irq/30-eth0_g0_4721-21ls20:09:311
121650350irq/29-eth0_g0_0-21swapper/020:54:460
121650350irq/29-eth0_g0_0-21swapper/019:09:570
2241099342cyclictest2029-21runrttasks20:44:441
2241099341cyclictest112612sleep120:34:471
121650340irq/29-eth0_g0_8826-21ntp_states20:24:490
121650340irq/29-eth0_g0_3705-21/usr/sbin/munin20:04:440
121650340irq/29-eth0_g0_11411-21mailstats20:34:510
121650330irq/29-eth0_g0_28899-21chrt19:34:460
121650330irq/29-eth0_g0_0-21swapper/020:14:470
121650330irq/29-eth0_g0_0-21swapper/019:24:310
121650320irq/29-eth0_g0_0-21swapper/020:44:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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