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2026-08-16 - 03:20

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 792 highest latencies:
System rack3slot5s.osadl.org (updated Sun Aug 16, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211070ksoftirqd/1121750irq/30-eth0_g0_23:19:151
1211010ksoftirqd/1236632sleep022:26:370
63112940sleep0121750irq/30-eth0_g0_21:15:090
120982740sleep1121750irq/30-eth0_g0_23:51:371
211172720sleep1121750irq/30-eth0_g0_20:01:571
71862620sleep0121650irq/29-eth0_g0_21:16:590
222532610sleep1121750irq/30-eth0_g0_22:20:061
217592610sleep0121650irq/29-eth0_g0_00:30:280
138952550sleep0121750irq/30-eth0_g0_23:56:580
138952550sleep0121750irq/30-eth0_g0_23:56:580
173422530sleep0121750irq/30-eth0_g0_22:00:000
121520ksoftirqd/1121650irq/29-eth0_g0_21:42:000
121520ksoftirqd/1121650irq/29-eth0_g0_00:02:390
224132510sleep0121650irq/29-eth0_g0_20:06:580
121750510irq/30-eth0_g0_121ksoftirqd/119:51:581
121750510irq/30-eth0_g0_121ksoftirqd/119:51:581
121510ksoftirqd/1121650irq/29-eth0_g0_21:49:540
121500ksoftirqd/1121750irq/30-eth0_g0_22:33:381
102092480sleep0121650irq/29-eth0_g0_21:31:420
121470ksoftirqd/1121750irq/30-eth0_g0_22:09:561
121470ksoftirqd/1121750irq/30-eth0_g0_00:27:421
121470ksoftirqd/1121650irq/29-eth0_g0_23:31:250
121470ksoftirqd/1121650irq/29-eth0_g0_00:25:290
121460ksoftirqd/1121750irq/30-eth0_g0_22:16:351
121750450irq/30-eth0_g0_1219-21kworker/1:223:01:591
121450ksoftirqd/1121650irq/29-eth0_g0_23:42:311
121450ksoftirqd/1121650irq/29-eth0_g0_22:57:301
121650440irq/29-eth0_g0_2093-21snmpd21:36:470
121750430irq/30-eth0_g0_1219-21kworker/1:223:29:481
121430ksoftirqd/1121750irq/30-eth0_g0_21:55:570
121430ksoftirqd/1121750irq/30-eth0_g0_00:22:061
121430ksoftirqd/1121650irq/29-eth0_g0_20:06:511
121750420irq/30-eth0_g0_1219-21kworker/1:223:57:571
121750420irq/30-eth0_g0_1219-21kworker/1:223:57:571
121750420irq/30-eth0_g0_1219-21kworker/1:221:07:361
121650420irq/29-eth0_g0_6471-21unixbench_multi19:01:560
121650420irq/29-eth0_g0_121ksoftirqd/100:15:170
121750410irq/30-eth0_g0_31ksoftirqd/022:51:250
121750410irq/30-eth0_g0_1219-21kworker/1:200:32:101
121650410irq/29-eth0_g0_8435-21latency_hist23:36:360
121650410irq/29-eth0_g0_31ksoftirqd/022:39:010
121650410irq/29-eth0_g0_1964-21runrttasks23:10:560
121650410irq/29-eth0_g0_1964-21runrttasks23:05:590
121410ksoftirqd/1121750irq/30-eth0_g0_19:17:020
121750400irq/30-eth0_g0_18794-21processes00:16:571
121750400irq/30-eth0_g0_1219-21kworker/1:223:26:101
121750400irq/30-eth0_g0_1219-21kworker/1:223:26:101
121650400irq/29-eth0_g0_13-21kworker/0:123:55:150
121650400irq/29-eth0_g0_13-21kworker/0:122:55:240
121400ksoftirqd/1121750irq/30-eth0_g0_22:11:100
121400ksoftirqd/1121750irq/30-eth0_g0_21:24:470
121400ksoftirqd/1121750irq/30-eth0_g0_20:57:120
121400ksoftirqd/1121750irq/30-eth0_g0_20:53:340
121400ksoftirqd/1121750irq/30-eth0_g0_20:41:480
121400ksoftirqd/1121750irq/30-eth0_g0_20:35:520
121400ksoftirqd/1121750irq/30-eth0_g0_20:30:310
121400ksoftirqd/1121750irq/30-eth0_g0_20:12:130
121400ksoftirqd/1121750irq/30-eth0_g0_20:12:130
121400ksoftirqd/1121750irq/30-eth0_g0_19:53:500
121400ksoftirqd/1121750irq/30-eth0_g0_19:53:500
121400ksoftirqd/1121750irq/30-eth0_g0_19:21:490
121400ksoftirqd/1121750irq/30-eth0_g0_19:15:400
121400ksoftirqd/1121650irq/29-eth0_g0_00:11:170
696199391cyclictest3986-21diskmemload21:51:361
696199391cyclictest3986-21diskmemload00:06:371
121750390irq/30-eth0_g0_1219-21kworker/1:222:55:221
121750390irq/30-eth0_g0_1219-21kworker/1:221:43:361
121750390irq/30-eth0_g0_1219-21kworker/1:221:32:091
121650390irq/29-eth0_g0_31ksoftirqd/022:26:560
121650390irq/29-eth0_g0_13-21kworker/0:123:11:520
121650390irq/29-eth0_g0_13-21kworker/0:122:31:490
121650390irq/29-eth0_g0_12469-21missed_timers23:51:521
121650390irq/29-eth0_g0_121ksoftirqd/123:31:581
121390ksoftirqd/16474-21latency_hist21:16:371
121390ksoftirqd/1121750irq/30-eth0_g0_23:49:250
121390ksoftirqd/1121750irq/30-eth0_g0_23:00:480
121390ksoftirqd/1121750irq/30-eth0_g0_21:29:250
121390ksoftirqd/1121750irq/30-eth0_g0_21:29:250
121390ksoftirqd/1121750irq/30-eth0_g0_21:10:510
121390ksoftirqd/1121750irq/30-eth0_g0_20:47:160
121390ksoftirqd/1121750irq/30-eth0_g0_19:57:120
121390ksoftirqd/1121750irq/30-eth0_g0_19:50:360
121390ksoftirqd/1121750irq/30-eth0_g0_19:39:280
121390ksoftirqd/1121750irq/30-eth0_g0_19:09:120
121390ksoftirqd/1121750irq/30-eth0_g0_19:09:120
121390ksoftirqd/1121750irq/30-eth0_g0_00:31:380
121390ksoftirqd/1121750irq/30-eth0_g0_00:17:060
121390ksoftirqd/1121650irq/29-eth0_g0_22:06:290
696199382cyclictest2109-21lldpd21:00:521
696199381cyclictest9629-21tail21:26:581
696199381cyclictest9629-21tail21:26:581
696199381cyclictest273102sleep122:41:361
696199381cyclictest24769-21awk20:16:551
696199381cyclictest16306-21latency_hist21:56:371
121750380irq/30-eth0_g0_6449-21grep19:01:561
121750380irq/30-eth0_g0_1964-21runrttasks20:35:141
121750380irq/30-eth0_g0_1219-21kworker/1:222:51:291
121750380irq/30-eth0_g0_1219-21kworker/1:222:45:231
121750380irq/30-eth0_g0_1219-21kworker/1:222:05:241
121750380irq/30-eth0_g0_1219-21kworker/1:221:38:451
121750380irq/30-eth0_g0_1219-21kworker/1:200:02:391
121750380irq/30-eth0_g0_0-21swapper/123:14:451
121650380irq/29-eth0_g0_13-21kworker/0:123:42:310
121650380irq/29-eth0_g0_13-21kworker/0:123:41:160
121650380irq/29-eth0_g0_13-21kworker/0:123:17:210
121380ksoftirqd/1121750irq/30-eth0_g0_22:18:590
121380ksoftirqd/1121750irq/30-eth0_g0_19:46:330
121380ksoftirqd/1121650irq/29-eth0_g0_21:25:291
696199372cyclictest12593-21unixbench_multi19:26:591
696199371cyclictest32235-21unixbench_multi20:46:561
696199371cyclictest16278-21grep19:41:591
696199371cyclictest10045-21wc19:16:561
696199371cyclictest0-21swapper/119:10:311
696199371cyclictest0-21swapper/119:10:311
121750370irq/30-eth0_g0_1964-21runrttasks21:04:511
121750370irq/30-eth0_g0_0-21swapper/119:36:551
121650370irq/29-eth0_g0_31ksoftirqd/023:25:260
121650370irq/29-eth0_g0_31ksoftirqd/023:25:260
121650370irq/29-eth0_g0_31ksoftirqd/022:44:310
121650370irq/29-eth0_g0_24873-21sed20:16:560
121650370irq/29-eth0_g0_20431-21runrttasks22:11:540
696199362cyclictest1964-21runrttasks20:38:131
696199361cyclictest8677-21grep19:11:551
696199361cyclictest24027-21missed_timers22:26:511
696199361cyclictest19944-21grep19:56:591
121750360irq/30-eth0_g0_1554-21processes23:06:561
121750360irq/30-eth0_g0_1219-21kworker/1:223:38:261
121750360irq/30-eth0_g0_1219-21kworker/1:200:14:091
121750360irq/30-eth0_g0_121ksoftirqd/121:18:361
121650360irq/29-eth0_g0_26109-21unixbench_multi20:22:010
121650360irq/29-eth0_g0_1964-21runrttasks20:02:080
121360ksoftirqd/1121650irq/29-eth0_g0_19:46:521
696199352cyclictest0-21swapper/120:22:011
696199351cyclictest11166-21/usr/sbin/munin19:21:541
696199351cyclictest0-21swapper/120:11:541
696199351cyclictest0-21swapper/120:11:541
121750350irq/30-eth0_g0_1219-21kworker/1:221:58:341
121650350irq/29-eth0_g0_4043-21taskset21:06:370
121650350irq/29-eth0_g0_13883-21unixbench_singl19:31:590
121650350irq/29-eth0_g0_12586-21unixbench_multi19:26:590
121650350irq/29-eth0_g0_121ksoftirqd/122:23:281
696199342cyclictest1964-21runrttasks20:52:051
696199341cyclictest269752sleep120:26:521
696199341cyclictest14332-21sort19:36:371
696199331cyclictest0-21swapper/120:45:351
121650330irq/29-eth0_g0_29905-21sshd20:37:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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