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2026-07-12 - 08:22

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 376 highest latencies:
System rack3slot5s.osadl.org (updated Sun Jul 12, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
215532520sleep0121650irq/29-eth0_g0_23:19:170
121520ksoftirqd/1121750irq/30-eth0_g0_21:23:101
194212500sleep0121650irq/29-eth0_g0_23:13:000
121490ksoftirqd/1121750irq/30-eth0_g0_22:15:341
121490ksoftirqd/1121750irq/30-eth0_g0_22:15:341
46872480chrt121750irq/30-eth0_g0_00:23:191
121650480irq/29-eth0_g0_121ksoftirqd/100:12:120
121650460irq/29-eth0_g0_23088-21df_abs19:03:140
121650460irq/29-eth0_g0_13-21kworker/0:123:52:110
121650450irq/29-eth0_g0_31ksoftirqd/000:30:170
121650450irq/29-eth0_g0_0-21swapper/022:23:160
121650430irq/29-eth0_g0_31ksoftirqd/022:28:160
121650430irq/29-eth0_g0_31ksoftirqd/000:27:100
121430ksoftirqd/1121750irq/30-eth0_g0_21:53:170
121430ksoftirqd/1121750irq/30-eth0_g0_00:22:200
235862420sleep1121650irq/29-eth0_g0_21:17:481
235862420sleep1121650irq/29-eth0_g0_21:17:481
121750420irq/30-eth0_g0_8706-21irqstats22:28:141
121750420irq/30-eth0_g0_1219-21kworker/1:221:51:331
121750420irq/30-eth0_g0_1219-21kworker/1:200:33:141
121650420irq/29-eth0_g0_1964-21runrttasks00:04:100
121650420irq/29-eth0_g0_1964-21runrttasks00:04:100
121650420irq/29-eth0_g0_13-21kworker/0:123:16:590
121420ksoftirqd/1121750irq/30-eth0_g0_00:01:201
272842410sleep1121650irq/29-eth0_g0_23:43:181
178432410sleep02093-21snmpd20:53:170
121750410irq/30-eth0_g0_27789-21munin-run19:23:011
121750410irq/30-eth0_g0_1219-21kworker/1:223:38:181
121750410irq/30-eth0_g0_1219-21kworker/1:223:12:031
121650410irq/29-eth0_g0_30491-21awk21:43:230
121650410irq/29-eth0_g0_31ksoftirqd/023:45:230
121650410irq/29-eth0_g0_31ksoftirqd/022:20:440
121650410irq/29-eth0_g0_13446-21df_abs22:48:120
121650410irq/29-eth0_g0_13-21kworker/0:123:27:440
121650410irq/29-eth0_g0_13-21kworker/0:121:28:070
121650410irq/29-eth0_g0_13-21kworker/0:121:25:020
121650410irq/29-eth0_g0_13-21kworker/0:121:13:570
121650410irq/29-eth0_g0_13-21kworker/0:121:13:570
121750400irq/30-eth0_g0_1964-21runrttasks19:04:081
121750400irq/30-eth0_g0_17849-21taskset23:04:021
121750400irq/30-eth0_g0_17849-21taskset23:04:021
121750400irq/30-eth0_g0_1219-21kworker/1:222:24:011
121750400irq/30-eth0_g0_121ksoftirqd/123:13:341
121650400irq/29-eth0_g0_1964-21runrttasks23:29:380
121650400irq/29-eth0_g0_13-21kworker/0:123:01:180
121650400irq/29-eth0_g0_13-21kworker/0:122:01:060
121650400irq/29-eth0_g0_13-21kworker/0:100:36:260
121650400irq/29-eth0_g0_121ksoftirqd/120:13:221
121750390irq/30-eth0_g0_1219-21kworker/1:222:48:391
121750390irq/30-eth0_g0_1219-21kworker/1:222:38:181
121650390irq/29-eth0_g0_31ksoftirqd/021:38:170
121650390irq/29-eth0_g0_25070-21grep23:33:230
121650390irq/29-eth0_g0_13-21kworker/0:123:54:100
121650390irq/29-eth0_g0_13-21kworker/0:123:05:010
121650390irq/29-eth0_g0_13-21kworker/0:123:05:010
121650390irq/29-eth0_g0_13-21kworker/0:122:45:120
121650390irq/29-eth0_g0_13-21kworker/0:122:36:350
121650390irq/29-eth0_g0_13-21kworker/0:122:16:560
121650390irq/29-eth0_g0_13-21kworker/0:122:16:560
121650390irq/29-eth0_g0_13-21kworker/0:122:09:250
121650390irq/29-eth0_g0_13-21kworker/0:121:49:110
121390ksoftirqd/1121650irq/29-eth0_g0_23:23:121
121390ksoftirqd/1121650irq/29-eth0_g0_20:57:251
121390ksoftirqd/1121650irq/29-eth0_g0_20:22:081
121750380irq/30-eth0_g0_1219-21kworker/1:223:56:221
121750380irq/30-eth0_g0_1219-21kworker/1:222:45:181
121750380irq/30-eth0_g0_1219-21kworker/1:200:28:191
121750380irq/30-eth0_g0_1219-21kworker/1:200:09:551
121650380irq/29-eth0_g0_6903-21grep20:08:150
121650380irq/29-eth0_g0_29495-21ntpdc19:28:200
121650380irq/29-eth0_g0_27388-21/usr/sbin/munin21:33:180
121650380irq/29-eth0_g0_21629-21ntp_kernel_pll_21:08:180
121650380irq/29-eth0_g0_1964-21runrttasks20:52:520
121650380irq/29-eth0_g0_1964-21runrttasks20:29:500
121650380irq/29-eth0_g0_1964-21runrttasks20:19:530
121650380irq/29-eth0_g0_1964-21runrttasks19:43:550
121650380irq/29-eth0_g0_1964-21runrttasks19:43:550
121650380irq/29-eth0_g0_1907-21sed00:13:110
121650380irq/29-eth0_g0_15632-21grep20:43:200
121650380irq/29-eth0_g0_13-21kworker/0:123:59:090
121650380irq/29-eth0_g0_13-21kworker/0:123:40:150
121650380irq/29-eth0_g0_13-21kworker/0:122:05:190
121650380irq/29-eth0_g0_13-21kworker/0:121:22:240
121650380irq/29-eth0_g0_11310-21ntpdc22:38:180
121380ksoftirqd/1121650irq/29-eth0_g0_23:19:061
121750370irq/30-eth0_g0_1219-21kworker/1:222:58:161
121750370irq/30-eth0_g0_1219-21kworker/1:221:44:321
121650370irq/29-eth0_g0_1964-21runrttasks19:55:440
121650370irq/29-eth0_g0_1964-21runrttasks19:55:440
121650370irq/29-eth0_g0_1964-21runrttasks19:48:220
121650370irq/29-eth0_g0_1964-21runrttasks19:48:220
121650370irq/29-eth0_g0_1964-21runrttasks19:14:290
121650370irq/29-eth0_g0_13-21kworker/0:122:57:510
121650370irq/29-eth0_g0_0-21swapper/020:58:120
121370ksoftirqd/1121650irq/29-eth0_g0_19:40:481
121750360irq/30-eth0_g0_1219-21kworker/1:222:33:161
121750360irq/30-eth0_g0_1219-21kworker/1:222:18:561
121750360irq/30-eth0_g0_1219-21kworker/1:200:19:221
121750360irq/30-eth0_g0_1219-21kworker/1:200:05:391
121750360irq/30-eth0_g0_1219-21kworker/1:200:05:391
121750360irq/30-eth0_g0_0-21swapper/123:33:561
121650360irq/29-eth0_g0_4056-21/usr/sbin/munin19:58:200
121650360irq/29-eth0_g0_1964-21runrttasks20:42:120
121650360irq/29-eth0_g0_1964-21runrttasks20:15:510
121650360irq/29-eth0_g0_1964-21runrttasks20:06:120
121650360irq/29-eth0_g0_1964-21runrttasks19:40:210
121650360irq/29-eth0_g0_1964-21runrttasks19:34:210
121650360irq/29-eth0_g0_1964-21runrttasks19:23:410
121650360irq/29-eth0_g0_1964-21runrttasks19:20:010
121650360irq/29-eth0_g0_13027-21ntpdc20:33:170
121360ksoftirqd/123463-21ls23:28:141
220802350sleep122081-21sshd21:09:351
121750350irq/30-eth0_g0_1219-21kworker/1:222:08:141
121750350irq/30-eth0_g0_1219-21kworker/1:222:03:361
121750350irq/30-eth0_g0_1219-21kworker/1:221:58:381
121750350irq/30-eth0_g0_1219-21kworker/1:221:53:241
121750350irq/30-eth0_g0_1219-21kworker/1:221:19:371
121750350irq/30-eth0_g0_0-21swapper/100:13:061
121650350irq/29-eth0_g0_20551-21sendmail_mailqu21:03:230
121650350irq/29-eth0_g0_10868-21grep20:23:230
2410099342cyclictest2745-21latency_hist19:53:001
2410099342cyclictest2745-21latency_hist19:53:001
121750340irq/30-eth0_g0_5681-21ntp_states20:03:181
121750340irq/30-eth0_g0_29109-21/usr/sbin/munin19:28:161
121750340irq/30-eth0_g0_29020-21open_files21:38:181
121750340irq/30-eth0_g0_28581-21unixbench_singl19:23:251
121750340irq/30-eth0_g0_28424-21chrt21:36:521
121750340irq/30-eth0_g0_1219-21kworker/1:223:50:021
121750340irq/30-eth0_g0_1219-21kworker/1:222:53:261
121750340irq/30-eth0_g0_0-21swapper/120:28:231
113322340sleep111338-21latency_hist20:28:011
2410099332cyclictest26850-21unixbench_singl21:28:221
2410099331cyclictest6507-21/usr/sbin/munin20:08:141
2410099331cyclictest25668-21latency19:13:161
121750330irq/30-eth0_g0_1983-21/usr/sbin/munin20:48:121
121750330irq/30-eth0_g0_18848-21df20:58:121
121650330irq/29-eth0_g0_1964-21runrttasks19:11:400
2410099322cyclictest4293-21irqstats19:58:161
2410099322cyclictest24895-21unixbench_singl19:08:231
2410099322cyclictest12942-21memory20:33:161
2410099321cyclictest30991-21unixbench_multi19:33:231
2410099321cyclictest14501-21grep20:38:221
121750320irq/30-eth0_g0_320-21chrt19:43:111
121750320irq/30-eth0_g0_320-21chrt19:43:111
121750320irq/30-eth0_g0_2889-21df19:53:121
121750320irq/30-eth0_g0_2889-21df19:53:121
121750320irq/30-eth0_g0_20279-21latency21:03:181
121750320irq/30-eth0_g0_15777-21sed20:43:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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