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2026-08-14 - 02:50

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 Fri Aug 14, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2223521340chrt121650irq/29-eth0_g0_22:40:441
1211160ksoftirqd/1121750irq/30-eth0_g0_20:17:311
121980ksoftirqd/1121750irq/30-eth0_g0_22:10:191
79872740sleep0121650irq/29-eth0_g0_23:53:220
233222730sleep1121750irq/30-eth0_g0_22:44:071
121620ksoftirqd/1242092sleep020:36:420
121520ksoftirqd/1121750irq/30-eth0_g0_21:22:551
121520ksoftirqd/1121750irq/30-eth0_g0_21:12:321
24212510sleep1121650irq/29-eth0_g0_21:18:051
121510ksoftirqd/1121750irq/30-eth0_g0_22:06:411
121510ksoftirqd/1121750irq/30-eth0_g0_21:59:261
121510ksoftirqd/1121750irq/30-eth0_g0_21:59:261
121490ksoftirqd/1121750irq/30-eth0_g0_21:52:361
121460ksoftirqd/1121750irq/30-eth0_g0_23:20:041
121460ksoftirqd/1121750irq/30-eth0_g0_20:56:561
161192450sleep0121650irq/29-eth0_g0_22:15:430
153062450chrt121750irq/30-eth0_g0_00:23:100
121650440irq/29-eth0_g0_132kworker/0:121:47:300
121440ksoftirqd/1121650irq/29-eth0_g0_21:42:421
121750430irq/30-eth0_g0_1219-21kworker/1:223:13:291
121750430irq/30-eth0_g0_1219-21kworker/1:222:47:181
121650430irq/29-eth0_g0_13-21kworker/0:122:57:020
121650430irq/29-eth0_g0_1044-21df19:01:520
121650430irq/29-eth0_g0_0-21swapper/022:37:010
121430ksoftirqd/1121750irq/30-eth0_g0_23:01:470
121430ksoftirqd/1121750irq/30-eth0_g0_20:37:300
121430ksoftirqd/1121650irq/29-eth0_g0_23:50:441
121430ksoftirqd/1121650irq/29-eth0_g0_21:46:591
34662420sleep0121750irq/30-eth0_g0_23:36:510
121750420irq/30-eth0_g0_1219-21kworker/1:223:11:141
121750420irq/30-eth0_g0_1219-21kworker/1:200:18:421
121750420irq/30-eth0_g0_1219-21kworker/1:200:04:471
121420ksoftirqd/1121650irq/29-eth0_g0_23:01:291
103422420sleep0121650irq/29-eth0_g0_00:02:200
121750410irq/30-eth0_g0_1219-21kworker/1:223:24:141
121750410irq/30-eth0_g0_1219-21kworker/1:221:35:411
121650410irq/29-eth0_g0_5333-21unixbench_multi19:17:040
121650410irq/29-eth0_g0_5333-21unixbench_multi19:17:040
121650410irq/29-eth0_g0_13-21kworker/0:100:30:050
121410ksoftirqd/1121650irq/29-eth0_g0_23:36:021
121410ksoftirqd/1121650irq/29-eth0_g0_23:36:021
121410ksoftirqd/1121650irq/29-eth0_g0_00:29:361
216199402cyclictest4919-21taskset23:41:551
121750400irq/30-eth0_g0_1219-21kworker/1:222:54:191
121650400irq/29-eth0_g0_28992-21proc_pri23:07:000
121650400irq/29-eth0_g0_216099cyclictest22:20:560
121650400irq/29-eth0_g0_13-21kworker/0:123:16:260
121650400irq/29-eth0_g0_13-21kworker/0:121:17:370
121650400irq/29-eth0_g0_13-21kworker/0:121:12:110
121650400irq/29-eth0_g0_13-21kworker/0:100:20:360
121650400irq/29-eth0_g0_121ksoftirqd/121:22:020
121400ksoftirqd/1121750irq/30-eth0_g0_22:26:360
121400ksoftirqd/1121650irq/29-eth0_g0_22:11:591
121400ksoftirqd/1121650irq/29-eth0_g0_21:37:011
134372390sleep0121650irq/29-eth0_g0_22:03:000
121750390irq/30-eth0_g0_14878-21/usr/sbin/munin00:22:001
121750390irq/30-eth0_g0_1219-21kworker/1:223:04:411
121650390irq/29-eth0_g0_7157-21unixbench_multi21:37:050
121650390irq/29-eth0_g0_31214-21irqstats23:16:550
121650390irq/29-eth0_g0_31ksoftirqd/022:32:010
121650390irq/29-eth0_g0_1543-21sendmail_mailst23:27:030
121650390irq/29-eth0_g0_15100-21tail19:57:030
121650390irq/29-eth0_g0_146742sleep022:08:080
121650390irq/29-eth0_g0_13-21kworker/0:123:57:000
121650390irq/29-eth0_g0_13-21kworker/0:123:24:470
121650390irq/29-eth0_g0_13-21kworker/0:122:27:130
121390ksoftirqd/1121750irq/30-eth0_g0_21:42:260
121390ksoftirqd/1121750irq/30-eth0_g0_21:35:390
121390ksoftirqd/1121750irq/30-eth0_g0_20:51:150
121390ksoftirqd/1121750irq/30-eth0_g0_20:18:260
121390ksoftirqd/1121750irq/30-eth0_g0_19:13:450
121390ksoftirqd/1121750irq/30-eth0_g0_00:08:080
216199381cyclictest230702sleep120:31:531
216199381cyclictest14926-21ps19:57:011
121750380irq/30-eth0_g0_31ksoftirqd/021:58:230
121750380irq/30-eth0_g0_31ksoftirqd/021:58:230
121750380irq/30-eth0_g0_1514-21/usr/sbin/munin19:01:591
121750380irq/30-eth0_g0_1219-21kworker/1:221:08:481
121750380irq/30-eth0_g0_121ksoftirqd/122:31:371
121750380irq/30-eth0_g0_10980-21seq00:06:531
121650380irq/29-eth0_g0_2851-21timerandwakeup19:07:030
121650380irq/29-eth0_g0_26034-21date22:56:420
121650380irq/29-eth0_g0_13515-21latency19:51:550
121650380irq/29-eth0_g0_13-21kworker/0:123:41:500
121650380irq/29-eth0_g0_13-21kworker/0:123:34:310
121650380irq/29-eth0_g0_13-21kworker/0:123:34:310
121650380irq/29-eth0_g0_13-21kworker/0:122:47:290
121650380irq/29-eth0_g0_13-21kworker/0:122:46:280
121650380irq/29-eth0_g0_13-21kworker/0:121:09:110
121650380irq/29-eth0_g0_13-21kworker/0:100:15:290
121380ksoftirqd/1121750irq/30-eth0_g0_19:39:020
121380ksoftirqd/1121650irq/29-eth0_g0_22:21:581
2161993723cyclictest1964-21runrttasks20:07:091
216199372cyclictest16596-21cat22:16:571
216199371cyclictest6052-21df19:21:541
216199371cyclictest31533-21sort21:06:421
216199371cyclictest31470-21diskmemload22:32:011
121750370irq/30-eth0_g0_1219-21kworker/1:223:57:591
121750370irq/30-eth0_g0_1219-21kworker/1:223:52:581
121750370irq/30-eth0_g0_121ksoftirqd/123:40:481
121650370irq/29-eth0_g0_25762-21sort20:41:580
121650370irq/29-eth0_g0_18336-21if_eth020:11:560
121650370irq/29-eth0_g0_17528-21grep20:07:030
121650370irq/29-eth0_g0_13-21kworker/0:123:47:340
121650370irq/29-eth0_g0_13-21kworker/0:121:53:560
121650370irq/29-eth0_g0_13-21kworker/0:100:36:160
121650370irq/29-eth0_g0_121ksoftirqd/123:27:501
216199361cyclictest7354-21awk19:26:551
216199361cyclictest4830-21df_abs19:16:541
216199361cyclictest4830-21df_abs19:16:541
216199361cyclictest27199-21taskset20:47:001
216199361cyclictest1964-21runrttasks20:27:021
216199361cyclictest12496-21ps00:12:011
121750360irq/30-eth0_g0_121ksoftirqd/100:33:191
121650360irq/29-eth0_g0_5990-21df_abs19:21:540
121650360irq/29-eth0_g0_1964-21runrttasks21:05:300
121650360irq/29-eth0_g0_13-21kworker/0:121:27:320
216199352cyclictest28528-21sed20:52:021
216199351cyclictest18657-21rt-features20:12:021
216199351cyclictest11408-21cat19:42:031
216199351cyclictest0-21swapper/119:34:301
121750350irq/30-eth0_g0_1219-21kworker/1:221:29:211
121650350irq/29-eth0_g0_20891-21ls20:21:570
121650350irq/29-eth0_g0_1964-21runrttasks20:56:010
121650350irq/29-eth0_g0_1964-21runrttasks20:24:171
121650350irq/29-eth0_g0_11928-21runrttasks19:46:370
216199342cyclictest25690-21iostat20:41:571
216199342cyclictest24374-21taskset20:36:521
216199341cyclictest0-21swapper/120:02:291
216199341cyclictest0-21swapper/119:52:131
216199341cyclictest0-21swapper/119:49:401
121750340irq/30-eth0_g0_9658-21df_abs19:36:531
121750340irq/30-eth0_g0_0-21swapper/119:09:541
121650340irq/29-eth0_g0_21940-21df_inode20:26:540
121650340irq/29-eth0_g0_216099cyclictest19:31:570
121650340irq/29-eth0_g0_1964-21runrttasks19:11:431
121650340irq/29-eth0_g0_12159-21df19:46:540
121650330irq/29-eth0_g0_1964-21runrttasks20:56:460
121650330irq/29-eth0_g0_0-21swapper/020:01:460
121650330irq/29-eth0_g0_0-21swapper/019:27:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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