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2026-03-22 - 02:10

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 Sun Mar 22, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1379121630sleep0121750irq/30-eth0_g0_23:04:330
121970ksoftirqd/1121750irq/30-eth0_g0_21:09:531
37482700sleep1121750irq/30-eth0_g0_22:22:301
121700ksoftirqd/1121750irq/30-eth0_g0_23:59:181
121600ksoftirqd/1121750irq/30-eth0_g0_00:30:471
121600ksoftirqd/1121650irq/29-eth0_g0_22:05:331
121590ksoftirqd/1121750irq/30-eth0_g0_23:40:061
58322580sleep1121750irq/30-eth0_g0_20:19:421
121560ksoftirqd/1121750irq/30-eth0_g0_21:40:391
121540ksoftirqd/1121750irq/30-eth0_g0_00:09:551
121540ksoftirqd/1121750irq/30-eth0_g0_00:09:551
121500ksoftirqd/1121750irq/30-eth0_g0_23:23:171
121500ksoftirqd/1121750irq/30-eth0_g0_22:25:061
121750490irq/30-eth0_g0_32164-21/usr/sbin/munin00:19:501
121490ksoftirqd/1121750irq/30-eth0_g0_21:25:491
121480ksoftirqd/1121750irq/30-eth0_g0_22:32:111
121480ksoftirqd/1121750irq/30-eth0_g0_22:32:111
121480ksoftirqd/1121750irq/30-eth0_g0_21:59:111
121480ksoftirqd/1121750irq/30-eth0_g0_21:59:111
255772470sleep1121750irq/30-eth0_g0_23:50:071
121460ksoftirqd/1121650irq/29-eth0_g0_21:44:330
121450ksoftirqd/1121750irq/30-eth0_g0_21:04:500
121450ksoftirqd/1121650irq/29-eth0_g0_22:09:551
302122440sleep0121750irq/30-eth0_g0_21:59:270
302122440sleep0121750irq/30-eth0_g0_21:59:270
121750440irq/30-eth0_g0_470-21kworker/1:123:19:051
121440ksoftirqd/1121650irq/29-eth0_g0_23:15:520
121650430irq/29-eth0_g0_31ksoftirqd/023:41:040
121650430irq/29-eth0_g0_2029-21runrttasks19:09:210
121650430irq/29-eth0_g0_13-21kworker/0:123:24:420
121430ksoftirqd/1121750irq/30-eth0_g0_20:59:510
121430ksoftirqd/1121650irq/29-eth0_g0_22:48:560
121430ksoftirqd/1121650irq/29-eth0_g0_22:37:311
87942420sleep1121750irq/30-eth0_g0_22:44:181
121750420irq/30-eth0_g0_470-21kworker/1:123:06:571
121650420irq/29-eth0_g0_30846-21crond00:14:320
121650420irq/29-eth0_g0_30846-21crond00:14:320
121650420irq/29-eth0_g0_31ksoftirqd/021:54:180
121650420irq/29-eth0_g0_13-21kworker/0:122:13:040
121420ksoftirqd/1121650irq/29-eth0_g0_00:25:450
2102999412cyclictest21763-21grep19:09:541
121650410irq/29-eth0_g0_26634-21taskset21:44:350
121650410irq/29-eth0_g0_2029-21runrttasks23:31:030
121650410irq/29-eth0_g0_2029-21runrttasks23:31:030
121410ksoftirqd/1121750irq/30-eth0_g0_19:59:530
121410ksoftirqd/1121650irq/29-eth0_g0_21:37:361
121750400irq/30-eth0_g0_470-21kworker/1:123:36:431
121750400irq/30-eth0_g0_470-21kworker/1:122:01:491
121750400irq/30-eth0_g0_470-21kworker/1:100:36:141
121750400irq/30-eth0_g0_31ksoftirqd/000:14:530
121750400irq/30-eth0_g0_29445-21seq00:07:281
121650400irq/29-eth0_g0_31ksoftirqd/021:29:540
121650400irq/29-eth0_g0_2102899cyclictest00:08:450
121650400irq/29-eth0_g0_13-21kworker/0:121:37:170
121650400irq/29-eth0_g0_13-21kworker/0:100:24:300
121400ksoftirqd/1121650irq/29-eth0_g0_20:31:291
121400ksoftirqd/1121650irq/29-eth0_g0_00:00:011
2102999391cyclictest19680-21awk21:14:481
2102999391cyclictest14940-21fgrep20:54:531
2102999391cyclictest119302sleep122:54:541
2102999391cyclictest119302sleep122:54:541
121750390irq/30-eth0_g0_31ksoftirqd/023:20:410
121750390irq/30-eth0_g0_121ksoftirqd/123:04:011
121750390irq/30-eth0_g0_0-21swapper/100:28:481
121650390irq/29-eth0_g0_31ksoftirqd/022:34:570
121650390irq/29-eth0_g0_21381-21interrupts23:34:460
121650390irq/29-eth0_g0_2029-21runrttasks23:00:260
121650390irq/29-eth0_g0_13-21kworker/0:122:04:050
283502380sleep0121750irq/30-eth0_g0_00:03:560
2102999382cyclictest24734-21latency_hist23:49:331
2102999381cyclictest5741-21munin-run20:19:321
2102999381cyclictest104292sleep122:49:481
121750380irq/30-eth0_g0_470-21kworker/1:123:29:511
121750380irq/30-eth0_g0_470-21kworker/1:123:29:511
121750380irq/30-eth0_g0_27308-21sed21:44:551
121650380irq/29-eth0_g0_31ksoftirqd/023:12:010
121650380irq/29-eth0_g0_31ksoftirqd/022:54:060
121650380irq/29-eth0_g0_2536-21netstat20:04:500
121650380irq/29-eth0_g0_2029-21runrttasks21:21:180
121650380irq/29-eth0_g0_13-21kworker/0:122:41:430
121650380irq/29-eth0_g0_13-21kworker/0:122:30:120
121650380irq/29-eth0_g0_13-21kworker/0:122:30:120
121650380irq/29-eth0_g0_13-21kworker/0:122:26:510
121650380irq/29-eth0_g0_13-21kworker/0:122:20:260
121650380irq/29-eth0_g0_13-21kworker/0:121:18:260
121380ksoftirqd/1121750irq/30-eth0_g0_00:30:360
121380ksoftirqd/1121650irq/29-eth0_g0_21:29:521
121380ksoftirqd/1121650irq/29-eth0_g0_20:00:401
121380ksoftirqd/1121650irq/29-eth0_g0_19:26:421
2102999371cyclictest3688-21/usr/sbin/munin20:09:501
2102999371cyclictest325362sleep119:54:501
2102999371cyclictest22635-21chrt19:14:471
2102999371cyclictest2034-21/usr/sbin/munin22:14:521
157822370sleep10-21swapper/120:59:441
121750370irq/30-eth0_g0_470-21kworker/1:123:10:241
121750370irq/30-eth0_g0_121ksoftirqd/100:14:571
121650370irq/29-eth0_g0_4082-21unixbench_singl20:09:560
121650370irq/29-eth0_g0_31ksoftirqd/023:44:580
121650370irq/29-eth0_g0_13-21kworker/0:123:56:350
121650370irq/29-eth0_g0_13-21kworker/0:122:57:070
121650370irq/29-eth0_g0_13-21kworker/0:122:57:070
121650370irq/29-eth0_g0_13-21kworker/0:122:06:140
121650370irq/29-eth0_g0_13-21kworker/0:121:28:320
121650370irq/29-eth0_g0_13-21kworker/0:100:36:400
2102999361cyclictest28549-21unixbench_singl21:49:541
2102999361cyclictest21128-21cat21:19:531
2102999361cyclictest0-21swapper/121:04:541
121750360irq/30-eth0_g0_470-21kworker/1:123:28:221
121750360irq/30-eth0_g0_470-21kworker/1:122:44:471
121750360irq/30-eth0_g0_2102899cyclictest19:54:510
121750360irq/30-eth0_g0_20507-21grep19:04:541
121650360irq/29-eth0_g0_2187-21lldpd21:09:420
121650360irq/29-eth0_g0_2102899cyclictest19:24:490
121650360irq/29-eth0_g0_2029-21runrttasks20:55:280
121650360irq/29-eth0_g0_2029-21runrttasks20:19:440
121650360irq/29-eth0_g0_13-21kworker/0:120:34:470
121650360irq/29-eth0_g0_12592-21unixbench_multi20:44:520
121650360irq/29-eth0_g0_0-21swapper/119:19:521
121650360irq/29-eth0_g0_0-21swapper/019:39:490
2102999351cyclictest7323-21seq20:24:471
2102999351cyclictest29598-21chrt19:44:321
2102999351cyclictest2696-21awk20:04:531
2102999351cyclictest0-21swapper/120:44:481
121750350irq/30-eth0_g0_29862-21forks19:44:451
121750350irq/30-eth0_g0_10127-21grep20:34:551
121650350irq/29-eth0_g0_5210-21cat20:14:540
121650350irq/29-eth0_g0_31ksoftirqd/022:14:540
121650350irq/29-eth0_g0_22419-21chrt19:14:440
121650350irq/29-eth0_g0_21586-21proc_pri19:09:510
121650350irq/29-eth0_g0_2029-21runrttasks20:31:570
121650350irq/29-eth0_g0_2029-21runrttasks19:35:300
121650350irq/29-eth0_g0_2029-21runrttasks19:32:330
121650350irq/29-eth0_g0_13-21kworker/0:123:54:160
2102999341cyclictest27639-21taskset19:34:511
2102999341cyclictest11180-21proc_pri20:39:481
2102999341cyclictest0-21swapper/119:51:051
121650340irq/29-eth0_g0_24701-21munin-run19:24:320
121650340irq/29-eth0_g0_2029-21runrttasks20:44:230
121650340irq/29-eth0_g0_2029-21runrttasks19:53:540
121650340irq/29-eth0_g0_13407-21iostat20:49:450
121650340irq/29-eth0_g0_0-21swapper/019:44:460
121340ksoftirqd/1121650irq/29-eth0_g0_19:29:451
121750330irq/30-eth0_g0_13457-21load20:49:461
121650330irq/29-eth0_g0_2029-21runrttasks20:27:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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