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2026-03-14 - 05:24

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 Sat Mar 14, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
670421270sleep1121650irq/29-eth0_g0_21:22:051
121870ksoftirqd/1121650irq/29-eth0_g0_20:05:090
121790ksoftirqd/1638399cyclictest22:03:101
121740ksoftirqd/1121750irq/30-eth0_g0_21:49:371
121740ksoftirqd/1121750irq/30-eth0_g0_21:49:371
121690ksoftirqd/1121750irq/30-eth0_g0_22:45:140
121690ksoftirqd/1121750irq/30-eth0_g0_22:45:140
121640ksoftirqd/1121750irq/30-eth0_g0_23:00:301
121630ksoftirqd/1121650irq/29-eth0_g0_21:55:031
134862530sleep1121750irq/30-eth0_g0_00:03:041
121490ksoftirqd/1121750irq/30-eth0_g0_22:21:391
121490ksoftirqd/1121750irq/30-eth0_g0_00:11:511
71542480sleep1121650irq/29-eth0_g0_23:35:341
121470ksoftirqd/1121750irq/30-eth0_g0_22:51:221
207322460sleep0121650irq/29-eth0_g0_00:31:550
191262460chrt121650irq/29-eth0_g0_22:14:400
121460ksoftirqd/1121750irq/30-eth0_g0_22:31:341
121460ksoftirqd/1121750irq/30-eth0_g0_22:10:471
121460ksoftirqd/1121650irq/29-eth0_g0_00:12:290
121650450irq/29-eth0_g0_29710-21unixbench_singl22:55:120
121450ksoftirqd/1121750irq/30-eth0_g0_21:52:191
121450ksoftirqd/1121750irq/30-eth0_g0_21:31:141
121450ksoftirqd/1121650irq/29-eth0_g0_19:45:041
121650440irq/29-eth0_g0_6795-21missed_timers19:10:060
121650440irq/29-eth0_g0_6795-21missed_timers19:10:060
121440ksoftirqd/1121750irq/30-eth0_g0_23:22:201
121440ksoftirqd/1121750irq/30-eth0_g0_00:07:131
121650430irq/29-eth0_g0_5919-21unixbench_singl19:05:100
121430ksoftirqd/1121650irq/29-eth0_g0_23:09:311
638399421cyclictest24213-21grep20:20:111
121750420irq/30-eth0_g0_470-21kworker/1:100:17:021
121750420irq/30-eth0_g0_121ksoftirqd/123:47:521
121650420irq/29-eth0_g0_31ksoftirqd/022:28:430
121650420irq/29-eth0_g0_31ksoftirqd/019:20:100
121650420irq/29-eth0_g0_10759-21chrt21:40:011
121420ksoftirqd/1121650irq/29-eth0_g0_22:06:481
638399411cyclictest20985-21taskset00:34:501
638399411cyclictest10691-21tail23:50:111
59822410sleep0121750irq/30-eth0_g0_23:31:140
59822410sleep0121750irq/30-eth0_g0_23:31:140
121750410irq/30-eth0_g0_4619-21cpu21:15:001
121650410irq/29-eth0_g0_13-21kworker/0:123:54:450
121650410irq/29-eth0_g0_13-21kworker/0:123:19:160
121650410irq/29-eth0_g0_13-21kworker/0:122:05:280
121410ksoftirqd/1121750irq/30-eth0_g0_23:46:540
638399401cyclictest18142-21grep19:55:141
121750400irq/30-eth0_g0_470-21kworker/1:100:20:081
121750400irq/30-eth0_g0_470-21kworker/1:100:20:081
121750400irq/30-eth0_g0_31ksoftirqd/000:18:510
121750400irq/30-eth0_g0_121ksoftirqd/120:45:081
121650400irq/29-eth0_g0_31ksoftirqd/022:18:540
121650400irq/29-eth0_g0_31ksoftirqd/021:40:130
121650400irq/29-eth0_g0_2029-21runrttasks19:57:550
121650400irq/29-eth0_g0_13-21kworker/0:121:25:290
121650400irq/29-eth0_g0_13-21kworker/0:121:20:220
121650400irq/29-eth0_g0_13-21kworker/0:100:21:290
121650400irq/29-eth0_g0_13-21kworker/0:100:21:290
121650400irq/29-eth0_g0_121ksoftirqd/123:44:270
121400ksoftirqd/1121750irq/30-eth0_g0_23:01:180
121400ksoftirqd/1121750irq/30-eth0_g0_21:18:580
121400ksoftirqd/1121650irq/29-eth0_g0_22:24:551
121400ksoftirqd/1121650irq/29-eth0_g0_21:33:000
121400ksoftirqd/1121650irq/29-eth0_g0_20:05:081
638399392cyclictest25579-21irqstats22:40:041
638399391cyclictest2772-21tail21:05:091
121750390irq/30-eth0_g0_5701-21which23:30:091
121750390irq/30-eth0_g0_5701-21which23:30:091
121750390irq/30-eth0_g0_121ksoftirqd/123:14:481
121750390irq/30-eth0_g0_121ksoftirqd/121:25:101
121650390irq/29-eth0_g0_638299cyclictest22:03:510
121650390irq/29-eth0_g0_31ksoftirqd/021:10:460
121650390irq/29-eth0_g0_13701-21latency_hist19:39:500
121650390irq/29-eth0_g0_13-21kworker/0:123:37:360
121650390irq/29-eth0_g0_13-21kworker/0:123:10:220
121650390irq/29-eth0_g0_13-21kworker/0:122:42:440
121650390irq/29-eth0_g0_13-21kworker/0:122:37:210
121650390irq/29-eth0_g0_13-21kworker/0:121:36:050
121650390irq/29-eth0_g0_0-21swapper/020:10:020
121390ksoftirqd/1121750irq/30-eth0_g0_22:52:070
121390ksoftirqd/1121750irq/30-eth0_g0_21:55:300
121390ksoftirqd/1121750irq/30-eth0_g0_00:38:380
121390ksoftirqd/1121650irq/29-eth0_g0_20:39:371
121390ksoftirqd/1121650irq/29-eth0_g0_19:43:401
121390ksoftirqd/1121650irq/29-eth0_g0_19:32:461
121390ksoftirqd/1121650irq/29-eth0_g0_19:32:461
638399381cyclictest83642sleep119:15:121
121750380irq/30-eth0_g0_470-21kworker/1:123:55:501
121750380irq/30-eth0_g0_470-21kworker/1:121:34:571
121750380irq/30-eth0_g0_470-21kworker/1:100:35:321
121750380irq/30-eth0_g0_26635-21seq22:45:041
121750380irq/30-eth0_g0_26635-21seq22:45:041
121750380irq/30-eth0_g0_121ksoftirqd/122:39:071
121750380irq/30-eth0_g0_0-21swapper/100:27:241
121650380irq/29-eth0_g0_8385-21grep19:15:120
121650380irq/29-eth0_g0_30957-21df_abs20:50:020
121650380irq/29-eth0_g0_31ksoftirqd/021:52:170
121650380irq/29-eth0_g0_16967-21awk19:50:150
121650380irq/29-eth0_g0_13-21kworker/0:123:56:150
121650380irq/29-eth0_g0_13-21kworker/0:123:26:320
121650380irq/29-eth0_g0_13-21kworker/0:123:05:080
121650380irq/29-eth0_g0_13-21kworker/0:122:20:140
121650380irq/29-eth0_g0_13-21kworker/0:100:24:560
121650380irq/29-eth0_g0_121ksoftirqd/121:13:211
121380ksoftirqd/1121750irq/30-eth0_g0_20:03:230
121380ksoftirqd/1121750irq/30-eth0_g0_19:49:080
121380ksoftirqd/1121750irq/30-eth0_g0_00:06:590
638399372cyclictest2048-21/usr/sbin/munin19:22:481
638399371cyclictest22397-21/usr/sbin/munin20:15:011
638399371cyclictest1817-21netstat23:15:041
638399371cyclictest12635-21taskset19:35:021
638399371cyclictest10355-21/usr/sbin/munin19:25:041
638399371cyclictest10355-21/usr/sbin/munin19:25:041
638399371cyclictest0-21swapper/122:18:251
121750370irq/30-eth0_g0_121ksoftirqd/123:42:091
121750370irq/30-eth0_g0_121ksoftirqd/123:27:071
121650370irq/29-eth0_g0_638299cyclictest20:42:070
121650370irq/29-eth0_g0_2811-21unixbench_singl21:05:090
121650370irq/29-eth0_g0_2029-21runrttasks20:58:200
121650370irq/29-eth0_g0_13-21kworker/0:122:30:000
121650370irq/29-eth0_g0_12807-21missed_timers00:00:050
121650370irq/29-eth0_g0_11914-21taskset19:30:100
121650370irq/29-eth0_g0_11914-21taskset19:30:100
121370ksoftirqd/1121650irq/29-eth0_g0_22:55:041
121370ksoftirqd/1121650irq/29-eth0_g0_20:27:321
638399361cyclictest31429-21find20:50:101
638399361cyclictest22276-21cat20:14:511
638399361cyclictest1074-21/usr/sbin/munin21:00:031
121750360irq/30-eth0_g0_5527-21memory19:05:041
121650360irq/29-eth0_g0_31ksoftirqd/021:45:000
121650360irq/29-eth0_g0_31ksoftirqd/021:45:000
121650360irq/29-eth0_g0_27802-21timerandwakeup20:35:110
121650360irq/29-eth0_g0_25149-21seq20:25:060
121650360irq/29-eth0_g0_2029-21runrttasks20:23:070
121650360irq/29-eth0_g0_14516-21vmstat19:40:120
121650360irq/29-eth0_g0_13-21kworker/0:123:21:460
121650360irq/29-eth0_g0_10721-21timerandwakeup19:25:110
121650360irq/29-eth0_g0_10721-21timerandwakeup19:25:110
121360ksoftirqd/1121650irq/29-eth0_g0_20:30:051
121750350irq/30-eth0_g0_121ksoftirqd/120:55:101
121650350irq/29-eth0_g0_30858-21grep20:49:510
121650350irq/29-eth0_g0_2029-21runrttasks20:18:160
121650350irq/29-eth0_g0_2029-21runrttasks19:12:031
121650350irq/29-eth0_g0_2029-21runrttasks19:12:031
121650350irq/29-eth0_g0_0-21swapper/021:00:000
638399341cyclictest19136-21wc20:00:091
121650340irq/29-eth0_g0_0-21swapper/020:30:100
638399331cyclictest16610-21taskset19:50:091
121750320irq/30-eth0_g0_29515-21runrttasks20:44:081
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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