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2026-01-10 - 10:47

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 Sat Jan 10, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
312140ksoftirqd/080692chrt19:06:000
121800ksoftirqd/1121750irq/30-eth0_g0_00:16:201
121800ksoftirqd/1121750irq/30-eth0_g0_00:16:201
193482670sleep0121750irq/30-eth0_g0_22:05:130
154852670sleep1121750irq/30-eth0_g0_00:01:511
135852570sleep1121750irq/30-eth0_g0_21:41:121
110652570sleep0121650irq/29-eth0_g0_21:30:230
218962560sleep0121750irq/30-eth0_g0_00:29:550
8417995037cyclictest19727-21if_eth000:20:081
33812500sleep1121750irq/30-eth0_g0_23:13:261
121650460irq/29-eth0_g0_17036-21latency_hist00:09:560
121650460irq/29-eth0_g0_11799-21latency21:35:090
121460ksoftirqd/1121750irq/30-eth0_g0_21:08:311
121460ksoftirqd/1121750irq/30-eth0_g0_21:08:311
121750450irq/30-eth0_g0_121ksoftirqd/123:35:131
121650440irq/29-eth0_g0_558-21df_abs20:50:060
121650440irq/29-eth0_g0_31ksoftirqd/023:15:070
121750430irq/30-eth0_g0_470-21kworker/1:122:51:121
121650430irq/29-eth0_g0_121ksoftirqd/120:15:111
121750420irq/30-eth0_g0_470-21kworker/1:123:29:451
121750420irq/30-eth0_g0_470-21kworker/1:122:25:131
121750420irq/30-eth0_g0_12507-21/usr/sbin/munin23:50:091
121750420irq/30-eth0_g0_121ksoftirqd/121:37:121
121650420irq/29-eth0_g0_31ksoftirqd/023:58:540
178422410sleep1121750irq/30-eth0_g0_00:10:451
121750410irq/30-eth0_g0_470-21kworker/1:121:48:211
121750410irq/30-eth0_g0_470-21kworker/1:121:14:191
121750410irq/30-eth0_g0_121ksoftirqd/122:35:141
121750410irq/30-eth0_g0_121ksoftirqd/121:15:161
121750410irq/30-eth0_g0_121ksoftirqd/119:25:111
121750410irq/30-eth0_g0_121ksoftirqd/119:25:111
121750410irq/30-eth0_g0_0-21swapper/122:10:051
121650410irq/29-eth0_g0_31ksoftirqd/022:22:240
121650410irq/29-eth0_g0_31ksoftirqd/022:15:160
121650410irq/29-eth0_g0_26851-21unixbench_multi22:35:160
121650410irq/29-eth0_g0_20161-21unixbench_multi19:55:170
121650410irq/29-eth0_g0_1988-21runrttasks00:19:160
121650410irq/29-eth0_g0_1988-21runrttasks00:19:160
121650410irq/29-eth0_g0_1988-21runrttasks00:10:130
121650410irq/29-eth0_g0_13-21kworker/0:122:58:510
121650410irq/29-eth0_g0_13-21kworker/0:121:41:120
121650410irq/29-eth0_g0_0-21swapper/021:00:110
121650410irq/29-eth0_g0_0-21swapper/021:00:110
8417994035cyclictest13695-21missed_timers23:55:091
8417994034cyclictest11606-21unixbench_multi23:45:161
121750400irq/30-eth0_g0_470-21kworker/1:121:58:451
121750400irq/30-eth0_g0_121ksoftirqd/121:53:001
121750400irq/30-eth0_g0_121ksoftirqd/100:35:051
121750400irq/30-eth0_g0_0-21swapper/123:24:191
121650400irq/29-eth0_g0_9789-21df_abs23:40:060
121650400irq/29-eth0_g0_3001-21/usr/sbin/munin23:10:160
121650400irq/29-eth0_g0_31ksoftirqd/019:14:560
121650400irq/29-eth0_g0_22211-21/usr/sbin/munin00:30:090
121650400irq/29-eth0_g0_13-21kworker/0:122:00:550
121650400irq/29-eth0_g0_13-21kworker/0:121:52:090
121650400irq/29-eth0_g0_13-21kworker/0:121:13:530
121650400irq/29-eth0_g0_13-21kworker/0:100:39:450
8417993934cyclictest400-21latency_hist20:49:551
8417993934cyclictest27543-21unixbench_singl20:25:161
8417993933cyclictest27749-21missed_timers22:40:101
8417993933cyclictest11216-21latency19:20:081
121750390irq/30-eth0_g0_951-21proc_pri20:50:131
121750390irq/30-eth0_g0_8736-21irqstats23:35:080
121750390irq/30-eth0_g0_470-21kworker/1:123:17:231
121750390irq/30-eth0_g0_470-21kworker/1:121:29:221
121750390irq/30-eth0_g0_121ksoftirqd/119:57:551
121650390irq/29-eth0_g0_4394-21runrttasks21:05:070
121650390irq/29-eth0_g0_4394-21runrttasks21:05:070
121650390irq/29-eth0_g0_1988-21runrttasks20:04:410
121650390irq/29-eth0_g0_13-21kworker/0:123:45:160
121650390irq/29-eth0_g0_13-21kworker/0:123:34:000
121650390irq/29-eth0_g0_13-21kworker/0:122:59:570
121650390irq/29-eth0_g0_13-21kworker/0:122:40:470
121650390irq/29-eth0_g0_13-21kworker/0:122:31:060
121650390irq/29-eth0_g0_13-21kworker/0:121:48:320
121650390irq/29-eth0_g0_13-21kworker/0:121:23:140
121650390irq/29-eth0_g0_11417-21proc_pri19:20:120
121650390irq/29-eth0_g0_0-21swapper/023:26:350
121390ksoftirqd/1121650irq/29-eth0_g0_23:01:531
8417993833cyclictest9181-21unixbench_singl19:10:161
8417993833cyclictest5342-21diskmemload22:45:131
8417993833cyclictest22610-21unixbench_multi00:30:161
8417993833cyclictest21956-21taskset20:05:061
8417993832cyclictest8513-21grep21:20:151
8417993832cyclictest16105-21latency19:40:081
8417993832cyclictest1428-21memory23:05:101
121750380irq/30-eth0_g0_25662-21unixbench_multi22:30:161
121750380irq/30-eth0_g0_0-21swapper/122:20:091
121650380irq/29-eth0_g0_57522sleep023:22:300
121650380irq/29-eth0_g0_30735-21iostat20:40:070
121650380irq/29-eth0_g0_30576-21unixbench_singl22:50:170
121650380irq/29-eth0_g0_31ksoftirqd/021:25:160
121650380irq/29-eth0_g0_31ksoftirqd/000:24:100
121650380irq/29-eth0_g0_29552-21ls20:35:090
121650380irq/29-eth0_g0_1988-21runrttasks20:34:000
121650380irq/29-eth0_g0_1988-21runrttasks19:52:060
121650380irq/29-eth0_g0_13340-21latency_hist19:29:550
121650380irq/29-eth0_g0_13340-21latency_hist19:29:550
121650380irq/29-eth0_g0_13-21kworker/0:122:45:030
121650380irq/29-eth0_g0_13-21kworker/0:122:27:150
121650380irq/29-eth0_g0_13-21kworker/0:100:02:080
121650380irq/29-eth0_g0_121ksoftirqd/122:01:161
121650380irq/29-eth0_g0_10375-21unixbench_multi19:15:160
8417993732cyclictest14029-21unixbench_multi19:30:161
841799371cyclictest19577-21grep22:05:161
121750370irq/30-eth0_g0_3362-21ntp_kernel_err21:00:111
121750370irq/30-eth0_g0_3362-21ntp_kernel_err21:00:111
121650370irq/29-eth0_g0_27257-21/usr/sbin/munin20:25:120
121650370irq/29-eth0_g0_25937-21missed_timers20:20:090
121650370irq/29-eth0_g0_25937-21missed_timers20:20:090
121650370irq/29-eth0_g0_24632-21irqstats20:15:090
121650370irq/29-eth0_g0_1988-21runrttasks23:06:370
121650370irq/29-eth0_g0_1988-21runrttasks19:39:520
121650370irq/29-eth0_g0_16975-21sendmail_mailqu21:55:140
121650370irq/29-eth0_g0_16881-21sshd19:43:510
121650370irq/29-eth0_g0_13-21kworker/0:122:11:130
121650370irq/29-eth0_g0_12240-21grep23:50:050
121650370irq/29-eth0_g0_121ksoftirqd/122:15:011
121650370irq/29-eth0_g0_121ksoftirqd/100:06:271
121370ksoftirqd/18160-21runrttasks19:07:041
121370ksoftirqd/1121650irq/29-eth0_g0_19:18:041
8417993630cyclictest21335-21timerandwakeup00:25:141
121750360irq/30-eth0_g0_470-21kworker/1:121:34:561
121750360irq/30-eth0_g0_10148-21open_inodes23:40:121
121650360irq/29-eth0_g0_23708-21sendmail_mailqu20:10:140
121650360irq/29-eth0_g0_1988-21runrttasks20:45:320
121650360irq/29-eth0_g0_13-21kworker/0:121:16:060
121650360irq/29-eth0_g0_0-21swapper/020:55:130
121360ksoftirqd/1121650irq/29-eth0_g0_20:20:541
121360ksoftirqd/1121650irq/29-eth0_g0_20:20:541
841799351cyclictest2444-21unixbench_singl20:55:161
121750350irq/30-eth0_g0_470-21kworker/1:123:30:031
121750350irq/30-eth0_g0_28442-21awk20:30:131
121650350irq/29-eth0_g0_22577-21unixbench_multi20:05:180
121650350irq/29-eth0_g0_1988-21runrttasks19:49:070
121650350irq/29-eth0_g0_13771-21netstat19:30:110
121650350irq/29-eth0_g0_121ksoftirqd/120:40:101
121750340irq/30-eth0_g0_470-21kworker/1:122:54:571
121750340irq/30-eth0_g0_15526-21taskset19:37:191
8417993327cyclictest19404-21runrttasks19:54:461
841799331cyclictest23752-21cat20:10:151
841799331cyclictest18100-21chrt19:48:511
121750330irq/30-eth0_g0_20966-21iostat20:00:101
841799322cyclictest29909-21taskset20:35:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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