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2026-09-24 - 00:36

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 Wed Sep 23, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211090ksoftirqd/1121750irq/30-eth0_g0_09:20:201
56962810sleep1121750irq/30-eth0_g0_08:25:231
56962810sleep1121750irq/30-eth0_g0_08:25:231
227812720sleep1121750irq/30-eth0_g0_09:35:191
212662710sleep0121750irq/30-eth0_g0_09:30:030
218142680sleep1121750irq/30-eth0_g0_11:43:021
121620ksoftirqd/1121750irq/30-eth0_g0_12:33:111
121590ksoftirqd/1121650irq/29-eth0_g0_11:20:271
77652550sleep1121650irq/29-eth0_g0_10:45:271
267232550sleep1121750irq/30-eth0_g0_12:02:571
26472540sleep0121750irq/30-eth0_g0_10:25:240
121520ksoftirqd/1121750irq/30-eth0_g0_10:54:571
121520ksoftirqd/1121750irq/30-eth0_g0_10:54:571
121520ksoftirqd/1121650irq/29-eth0_g0_11:35:281
121490ksoftirqd/17442sleep110:16:051
121750480irq/30-eth0_g0_1808099cyclictest10:21:431
121650480irq/29-eth0_g0_1808099cyclictest10:56:031
121480ksoftirqd/1121750irq/30-eth0_g0_12:15:170
121480ksoftirqd/1121750irq/30-eth0_g0_07:31:471
121750470irq/30-eth0_g0_1808099cyclictest12:13:341
121750470irq/30-eth0_g0_1808099cyclictest11:56:271
121750470irq/30-eth0_g0_1808099cyclictest10:05:201
121650470irq/29-eth0_g0_1808099cyclictest11:28:141
121470ksoftirqd/11808099cyclictest11:15:271
121470ksoftirqd/1121750irq/30-eth0_g0_10:12:491
1808099467cyclictest121750irq/30-eth0_g0_08:22:001
18080994615cyclictest14822-21runrttasks09:01:341
18080994613cyclictest23820-21runrttasks07:25:321
121750460irq/30-eth0_g0_1808099cyclictest11:10:331
121650460irq/29-eth0_g0_23281-21grep11:50:060
121650460irq/29-eth0_g0_23281-21grep11:50:060
121460ksoftirqd/1121750irq/30-eth0_g0_11:32:331
121460ksoftirqd/1121650irq/29-eth0_g0_09:32:281
18080994532cyclictest29253-21processes10:00:241
18080994532cyclictest29253-21processes10:00:241
18080994532cyclictest27297-21rt-features07:40:261
18080994519cyclictest22628-21runrttasks07:20:571
121750450irq/30-eth0_g0_20542-21latency_hist07:15:071
121750450irq/30-eth0_g0_121ksoftirqd/109:55:271
121650450irq/29-eth0_g0_13-21kworker/0:112:12:030
121450ksoftirqd/1121750irq/30-eth0_g0_11:00:101
121450ksoftirqd/1121750irq/30-eth0_g0_09:27:041
46102440sleep0121650irq/29-eth0_g0_10:32:480
18080994416cyclictest8738-21runrttasks08:37:111
121750440irq/30-eth0_g0_30912-21iostat12:20:201
121750440irq/30-eth0_g0_1808099cyclictest11:48:361
121750440irq/30-eth0_g0_1808099cyclictest11:48:361
121750440irq/30-eth0_g0_121ksoftirqd/110:37:511
121750440irq/30-eth0_g0_121ksoftirqd/110:26:591
121650440irq/29-eth0_g0_21754-21taskset11:42:200
121650440irq/29-eth0_g0_1808099cyclictest08:00:251
121650440irq/29-eth0_g0_13-21kworker/0:111:20:530
121650440irq/29-eth0_g0_13-21kworker/0:111:10:290
121650440irq/29-eth0_g0_0-21swapper/009:00:220
121440ksoftirqd/11808099cyclictest08:30:211
121440ksoftirqd/11808099cyclictest07:45:161
121440ksoftirqd/1121750irq/30-eth0_g0_10:40:111
121440ksoftirqd/1121650irq/29-eth0_g0_08:41:491
18080994329cyclictest0-21swapper/109:05:181
18080994318cyclictest3584-21sed08:15:261
18080994311cyclictest32683-21runrttasks12:25:551
121750430irq/30-eth0_g0_121ksoftirqd/109:40:451
121650430irq/29-eth0_g0_680-21/usr/sbin/munin12:30:180
121650430irq/29-eth0_g0_13-21kworker/0:111:29:230
121650430irq/29-eth0_g0_13-21kworker/0:111:00:000
121650430irq/29-eth0_g0_13-21kworker/0:110:38:250
121650430irq/29-eth0_g0_13-21kworker/0:110:04:210
121650430irq/29-eth0_g0_13-21kworker/0:110:04:210
121430ksoftirqd/11808099cyclictest08:55:171
121430ksoftirqd/1121750irq/30-eth0_g0_11:53:121
1808099429cyclictest29767-21sendmail_mailst07:50:261
18080994219cyclictest26902-21grep09:50:281
18080994219cyclictest19181-21runrttasks07:08:411
18080994216cyclictest12619-21runrttasks08:54:291
121750420irq/30-eth0_g0_21283-21grep07:15:270
121750420irq/30-eth0_g0_1964-21runrttasks08:41:010
121750420irq/30-eth0_g0_15133-21diskmemload09:46:481
121750420irq/30-eth0_g0_1219-21kworker/1:212:05:141
121750420irq/30-eth0_g0_0-21swapper/111:05:281
121650420irq/29-eth0_g0_22178-21runrttasks09:31:250
121650420irq/29-eth0_g0_1964-21runrttasks12:05:320
121650420irq/29-eth0_g0_1964-21runrttasks07:03:480
121650420irq/29-eth0_g0_18078-21cyclictest12:27:560
121650420irq/29-eth0_g0_13-21kworker/0:111:58:590
121650420irq/29-eth0_g0_13-21kworker/0:111:02:150
121650420irq/29-eth0_g0_13-21kworker/0:110:48:570
121650420irq/29-eth0_g0_13-21kworker/0:109:22:330
121650420irq/29-eth0_g0_0-21swapper/012:00:240
121420ksoftirqd/1121750irq/30-eth0_g0_10:53:170
121420ksoftirqd/1121750irq/30-eth0_g0_10:53:170
1808099415cyclictest11214-21runrttasks08:47:261
18080994123cyclictest2256-21sendmail_mailqu08:10:261
1808099412cyclictest3996-21cat10:30:221
1808099412cyclictest21408-21runrttasks07:16:021
18080994115cyclictest31339-21runrttasks07:57:161
18080994114cyclictest1364-21runrttasks08:07:191
1808099411cyclictest17250-21runrttasks09:11:131
1808099411cyclictest17250-21runrttasks09:11:131
1808099411cyclictest0-21swapper/107:36:401
1808099411cyclictest0-21swapper/107:36:401
121750410irq/30-eth0_g0_0-21swapper/008:45:290
121650410irq/29-eth0_g0_13-21kworker/0:111:32:200
121650410irq/29-eth0_g0_13-21kworker/0:111:18:370
121650410irq/29-eth0_g0_13-21kworker/0:111:05:460
121650410irq/29-eth0_g0_13-21kworker/0:110:23:000
121650410irq/29-eth0_g0_13-21kworker/0:110:12:160
121650410irq/29-eth0_g0_13-21kworker/0:109:40:530
121650410irq/29-eth0_g0_13-21kworker/0:109:11:020
121650410irq/29-eth0_g0_13-21kworker/0:109:11:020
121410ksoftirqd/11808099cyclictest09:15:271
121410ksoftirqd/1121750irq/30-eth0_g0_12:16:011
121410ksoftirqd/1121750irq/30-eth0_g0_09:36:200
121750400irq/30-eth0_g0_1964-21runrttasks08:11:380
121650400irq/29-eth0_g0_1964-21runrttasks07:50:590
121650400irq/29-eth0_g0_13-21kworker/0:112:20:450
121650400irq/29-eth0_g0_13-21kworker/0:111:35:220
121650400irq/29-eth0_g0_13-21kworker/0:109:51:240
121650400irq/29-eth0_g0_13-21kworker/0:109:45:230
121750390irq/30-eth0_g0_25703-21/usr/sbin/munin07:35:180
121750390irq/30-eth0_g0_25703-21/usr/sbin/munin07:35:180
121750390irq/30-eth0_g0_1964-21runrttasks11:53:450
121650390irq/29-eth0_g0_1964-21runrttasks10:07:180
121650390irq/29-eth0_g0_1964-21runrttasks08:36:200
121650390irq/29-eth0_g0_1964-21runrttasks07:45:120
121650390irq/29-eth0_g0_13-21kworker/0:110:43:580
121650390irq/29-eth0_g0_13-21kworker/0:109:19:570
121650390irq/29-eth0_g0_13-21kworker/0:109:07:470
121390ksoftirqd/1121750irq/30-eth0_g0_10:18:550
121750380irq/30-eth0_g0_27312-21sendmail_mailst07:40:260
121750380irq/30-eth0_g0_1964-21runrttasks07:13:390
121380ksoftirqd/117061-21/usr/sbin/munin07:00:181
121750370irq/30-eth0_g0_24223-21latency_hist07:30:070
121650370irq/29-eth0_g0_31988-21missed_timers08:00:240
121650370irq/29-eth0_g0_1964-21runrttasks08:31:510
121650360irq/29-eth0_g0_1964-21runrttasks08:27:310
121650360irq/29-eth0_g0_1964-21runrttasks08:27:310
121650360irq/29-eth0_g0_1964-21runrttasks08:15:200
121650360irq/29-eth0_g0_0-21swapper/009:57:500
121650360irq/29-eth0_g0_0-21swapper/008:55:210
121650360irq/29-eth0_g0_0-21swapper/008:21:450
121750350irq/30-eth0_g0_30717-21ls07:55:190
121650350irq/29-eth0_g0_698-21cat08:05:210
121650350irq/29-eth0_g0_24948-21unixbench_multi07:30:280
121650350irq/29-eth0_g0_22233-21/usr/sbin/munin07:20:220
121650350irq/29-eth0_g0_19314-21latency_hist07:10:070
121650350irq/29-eth0_g0_11544-21/usr/sbin/munin08:50:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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