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2026-06-03 - 11:11

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 Wed Jun 03, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2300921190sleep0121650irq/29-eth0_g0_21:36:560
88252850sleep0121650irq/29-eth0_g0_22:49:570
140442760sleep1121750irq/30-eth0_g0_23:13:341
121740ksoftirqd/1121750irq/30-eth0_g0_22:14:140
52922710sleep0121650irq/29-eth0_g0_22:36:400
121670ksoftirqd/1121750irq/30-eth0_g0_21:02:470
121630ksoftirqd/1121750irq/30-eth0_g0_23:44:541
121620ksoftirqd/1121750irq/30-eth0_g0_22:35:401
25132600sleep1121750irq/30-eth0_g0_22:24:541
121600ksoftirqd/1121750irq/30-eth0_g0_23:26:311
121590ksoftirqd/1121750irq/30-eth0_g0_19:17:370
121570ksoftirqd/1121650irq/29-eth0_g0_19:59:551
121560ksoftirqd/1121750irq/30-eth0_g0_23:19:271
121560ksoftirqd/1121750irq/30-eth0_g0_23:04:571
121550ksoftirqd/1121750irq/30-eth0_g0_21:09:571
121540ksoftirqd/1121750irq/30-eth0_g0_21:23:131
121540ksoftirqd/1121750irq/30-eth0_g0_19:29:511
121540ksoftirqd/1121650irq/29-eth0_g0_21:30:021
121750520irq/30-eth0_g0_2098599cyclictest00:10:451
121750520irq/30-eth0_g0_2098599cyclictest00:10:451
144502510sleep0121750irq/30-eth0_g0_23:14:460
121650510irq/29-eth0_g0_13677-21unixbench_singl23:09:550
121510ksoftirqd/1121750irq/30-eth0_g0_21:35:131
2098599501cyclictest69882sleep120:31:121
121500ksoftirqd/1121750irq/30-eth0_g0_22:24:261
250762490sleep1121750irq/30-eth0_g0_21:44:531
2098599498cyclictest0-21swapper/122:14:451
121490ksoftirqd/1121750irq/30-eth0_g0_22:54:511
121490ksoftirqd/1121750irq/30-eth0_g0_22:40:530
121750470irq/30-eth0_g0_2098599cyclictest22:08:001
121750470irq/30-eth0_g0_2098599cyclictest00:02:581
121470ksoftirqd/1121750irq/30-eth0_g0_20:24:540
121470ksoftirqd/1121650irq/29-eth0_g0_00:28:141
241292460sleep1121750irq/30-eth0_g0_21:40:411
121750460irq/30-eth0_g0_2098599cyclictest23:30:001
121650460irq/29-eth0_g0_26648-21df_abs00:04:500
121460ksoftirqd/1121750irq/30-eth0_g0_21:24:340
121460ksoftirqd/1121650irq/29-eth0_g0_00:29:501
20985994521cyclictest0-21swapper/119:16:501
2098599451cyclictest1964-21runrttasks19:25:001
121450ksoftirqd/1121750irq/30-eth0_g0_21:54:481
121450ksoftirqd/1121750irq/30-eth0_g0_21:54:481
121450ksoftirqd/1121650irq/29-eth0_g0_22:57:340
121450ksoftirqd/1121650irq/29-eth0_g0_00:34:511
2098599449cyclictest9269-21grep20:39:561
20985994410cyclictest121750irq/30-eth0_g0_19:09:481
2098599441cyclictest114262sleep123:01:401
155862440sleep1121750irq/30-eth0_g0_23:19:471
155862440sleep1121750irq/30-eth0_g0_23:19:471
121750440irq/30-eth0_g0_2098599cyclictest22:09:421
121750440irq/30-eth0_g0_121ksoftirqd/121:14:581
121750440irq/30-eth0_g0_121ksoftirqd/100:15:151
121650440irq/29-eth0_g0_1964-21runrttasks00:18:050
121440ksoftirqd/12098599cyclictest22:44:451
121440ksoftirqd/1121750irq/30-eth0_g0_23:39:481
121440ksoftirqd/1121750irq/30-eth0_g0_23:35:460
121440ksoftirqd/1121750irq/30-eth0_g0_22:50:061
121440ksoftirqd/1121750irq/30-eth0_g0_00:20:451
20985994322cyclictest0-21swapper/120:04:581
2098599432cyclictest28740-21/usr/sbin/munin19:49:511
2098599432cyclictest20268-21unixbench_multi21:24:561
20985994311cyclictest121750irq/30-eth0_g0_21:04:461
20985994311cyclictest121750irq/30-eth0_g0_21:04:461
2098599431cyclictest1964-21runrttasks19:24:051
121750430irq/30-eth0_g0_2098599cyclictest22:44:151
121650430irq/29-eth0_g0_1964-21runrttasks23:48:190
121650430irq/29-eth0_g0_0-21swapper/021:16:410
121430ksoftirqd/12098599cyclictest19:54:521
121430ksoftirqd/1121750irq/30-eth0_g0_22:32:071
121430ksoftirqd/1121750irq/30-eth0_g0_22:01:151
121430ksoftirqd/1121650irq/29-eth0_g0_23:50:121
2098599422cyclictest3105-21grep20:14:561
2098599421cyclictest26505-21/usr/sbin/munin00:04:491
2098599421cyclictest1964-21runrttasks20:37:421
121650420irq/29-eth0_g0_1964-21runrttasks23:53:460
121420ksoftirqd/1121750irq/30-eth0_g0_21:53:171
20985994121cyclictest26359-21df_abs19:39:421
2098599411cyclictest258572sleep119:35:411
2098599411cyclictest258572sleep119:35:411
2098599411cyclictest1983-21/usr/sbin/munin19:44:451
121650410irq/29-eth0_g0_2098599cyclictest23:55:131
121650410irq/29-eth0_g0_1964-21runrttasks00:11:310
121650410irq/29-eth0_g0_1964-21runrttasks00:11:310
121650410irq/29-eth0_g0_13-21kworker/0:122:27:270
121650410irq/29-eth0_g0_13-21kworker/0:121:54:180
121410ksoftirqd/1121750irq/30-eth0_g0_23:35:191
2098599408cyclictest121750irq/30-eth0_g0_20:49:451
2098599402cyclictest9890-21df20:44:471
20985994010cyclictest121650irq/29-eth0_g0_20:09:461
121750400irq/30-eth0_g0_25097-21sendmail_mailtr19:29:510
121650400irq/29-eth0_g0_27010-21/usr/sbin/munin21:54:540
121650400irq/29-eth0_g0_27010-21/usr/sbin/munin21:54:540
121650400irq/29-eth0_g0_1964-21runrttasks19:09:190
121650400irq/29-eth0_g0_13-21kworker/0:123:55:360
121650400irq/29-eth0_g0_13-21kworker/0:123:26:290
121650400irq/29-eth0_g0_13-21kworker/0:123:08:010
121650400irq/29-eth0_g0_13-21kworker/0:100:03:100
121400ksoftirqd/12098599cyclictest20:24:471
121400ksoftirqd/1121750irq/30-eth0_g0_20:15:410
2098599397cyclictest121750irq/30-eth0_g0_21:04:341
20985993922cyclictest12652-21nfs_client20:54:481
2098599391cyclictest40652sleep120:19:501
121750390irq/30-eth0_g0_32233-21/usr/sbin/munin22:14:490
121750390irq/30-eth0_g0_26651-21netstat19:39:460
121750390irq/30-eth0_g0_20981-21munin-run19:09:341
121750390irq/30-eth0_g0_1964-21runrttasks23:42:330
121650390irq/29-eth0_g0_3623-21proc_pri22:29:530
121650390irq/29-eth0_g0_30840-21unixbench_multi00:19:570
121650390irq/29-eth0_g0_29706-21latency22:04:490
121650390irq/29-eth0_g0_13-21kworker/0:122:47:530
121650390irq/29-eth0_g0_13-21kworker/0:121:10:270
121650390irq/29-eth0_g0_13-21kworker/0:100:27:490
121650390irq/29-eth0_g0_0-21swapper/000:35:300
121750380irq/30-eth0_g0_1964-21runrttasks23:20:170
121750380irq/30-eth0_g0_1964-21runrttasks23:20:170
121750380irq/30-eth0_g0_12507-21iostat20:54:460
121750380irq/30-eth0_g0_11262-21if_eth020:49:480
121650380irq/29-eth0_g0_30607-21grep19:54:570
121650380irq/29-eth0_g0_29385-21unixbench_multi19:49:540
121650380irq/29-eth0_g0_25277-21vmstat21:44:560
121650380irq/29-eth0_g0_23016-21if_eth019:19:430
121650380irq/29-eth0_g0_1674-21proc_pri20:09:520
121650380irq/29-eth0_g0_13-21kworker/0:123:32:520
121650380irq/29-eth0_g0_13-21kworker/0:121:59:490
121650380irq/29-eth0_g0_11200-21unixbench_multi22:59:550
121380ksoftirqd/1121750irq/30-eth0_g0_00:31:080
121750370irq/30-eth0_g0_9272-21sed20:39:560
121750370irq/30-eth0_g0_0-21swapper/020:38:070
121750370irq/30-eth0_g0_0-21swapper/020:03:140
121650370irq/29-eth0_g0_13-21kworker/0:121:39:390
121650370irq/29-eth0_g0_13-21kworker/0:121:33:170
121650370irq/29-eth0_g0_0-21swapper/021:24:450
121650370irq/29-eth0_g0_0-21swapper/021:04:510
121650370irq/29-eth0_g0_0-21swapper/021:04:510
121750360irq/30-eth0_g0_0-21swapper/019:13:470
121650360irq/29-eth0_g0_6417-21sort20:29:500
121650360irq/29-eth0_g0_32699-21sort20:04:520
121650360irq/29-eth0_g0_0-21swapper/022:21:150
121750350irq/30-eth0_g0_10231-21chrt20:44:530
121650350irq/29-eth0_g0_4541-21runrttasks20:21:170
121650330irq/29-eth0_g0_27760-21latency19:44:480
121650320irq/29-eth0_g0_26206-21latency_hist19:39:350
121650320irq/29-eth0_g0_26206-21latency_hist19:39:350
121650320irq/29-eth0_g0_24380-21runrttasks19:28:420
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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