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2026-06-10 - 01:54

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 Wed Jun 10, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211080ksoftirqd/1121750irq/30-eth0_g0_00:01:581
1211050ksoftirqd/1121750irq/30-eth0_g0_20:52:301
1211050ksoftirqd/1121750irq/30-eth0_g0_00:09:251
1878221010chrt121750irq/30-eth0_g0_21:33:440
1211010ksoftirqd/1121750irq/30-eth0_g0_22:46:480
121930ksoftirqd/1121750irq/30-eth0_g0_21:49:501
121870ksoftirqd/1121750irq/30-eth0_g0_21:59:321
121870ksoftirqd/1121650irq/29-eth0_g0_20:59:320
121870ksoftirqd/1121650irq/29-eth0_g0_20:59:320
121790ksoftirqd/1121750irq/30-eth0_g0_22:19:031
71592600sleep0121750irq/30-eth0_g0_22:58:130
71592600sleep0121750irq/30-eth0_g0_22:58:130
121590ksoftirqd/1121750irq/30-eth0_g0_22:54:551
121590ksoftirqd/1121750irq/30-eth0_g0_22:54:551
121510ksoftirqd/1121750irq/30-eth0_g0_23:44:531
121510ksoftirqd/1121750irq/30-eth0_g0_23:35:051
121510ksoftirqd/1121750irq/30-eth0_g0_00:14:300
121500ksoftirqd/1121650irq/29-eth0_g0_23:09:170
121490ksoftirqd/1121750irq/30-eth0_g0_21:41:091
121480ksoftirqd/1121750irq/30-eth0_g0_23:58:321
203792460sleep0121750irq/30-eth0_g0_23:50:070
121650460irq/29-eth0_g0_13-21kworker/0:100:04:390
121650450irq/29-eth0_g0_1964-21runrttasks19:04:310
121450ksoftirqd/1121750irq/30-eth0_g0_00:36:331
121750440irq/30-eth0_g0_1219-21kworker/1:223:05:331
121440ksoftirqd/1121650irq/29-eth0_g0_21:20:051
121750430irq/30-eth0_g0_1219-21kworker/1:223:50:041
121750430irq/30-eth0_g0_1219-21kworker/1:221:25:251
121650430irq/29-eth0_g0_31ksoftirqd/021:52:450
121430ksoftirqd/1121750irq/30-eth0_g0_23:39:281
121430ksoftirqd/1121750irq/30-eth0_g0_21:38:521
121750420irq/30-eth0_g0_1219-21kworker/1:200:21:421
121650420irq/29-eth0_g0_1964-21runrttasks23:55:130
121650420irq/29-eth0_g0_1568799cyclictest23:09:200
121420ksoftirqd/1121650irq/29-eth0_g0_00:33:071
1568899419cyclictest23262-21/usr/sbin/munin19:39:301
121750410irq/30-eth0_g0_1219-21kworker/1:222:12:561
121650410irq/29-eth0_g0_31ksoftirqd/023:34:050
121650410irq/29-eth0_g0_31ksoftirqd/000:35:250
121650410irq/29-eth0_g0_13-21kworker/0:122:17:570
1568899407cyclictest0-21swapper/121:09:321
121750400irq/30-eth0_g0_1219-21kworker/1:223:14:371
121750400irq/30-eth0_g0_1219-21kworker/1:223:12:511
121750400irq/30-eth0_g0_1219-21kworker/1:222:53:541
121750400irq/30-eth0_g0_1219-21kworker/1:222:39:421
121650400irq/29-eth0_g0_31ksoftirqd/020:24:330
121650400irq/29-eth0_g0_2601-21df_inode22:39:300
121650400irq/29-eth0_g0_1964-21runrttasks00:10:570
121650400irq/29-eth0_g0_16908-21chrt23:37:300
121650400irq/29-eth0_g0_13-21kworker/0:121:58:460
121650400irq/29-eth0_g0_13-21kworker/0:121:58:460
121650400irq/29-eth0_g0_13-21kworker/0:100:30:220
121650400irq/29-eth0_g0_13-21kworker/0:100:22:230
121650400irq/29-eth0_g0_121ksoftirqd/121:44:301
121400ksoftirqd/1121650irq/29-eth0_g0_21:30:421
209322390sleep0121750irq/30-eth0_g0_21:40:130
1568899391cyclictest1901-21/usr/sbin/munin20:24:311
121750390irq/30-eth0_g0_866-21seq20:19:341
121750390irq/30-eth0_g0_1219-21kworker/1:222:48:201
121750390irq/30-eth0_g0_1219-21kworker/1:222:31:001
121750390irq/30-eth0_g0_1219-21kworker/1:222:08:511
121750390irq/30-eth0_g0_1219-21kworker/1:221:14:221
121750390irq/30-eth0_g0_1219-21kworker/1:200:08:501
121650390irq/29-eth0_g0_31ksoftirqd/021:20:040
121650390irq/29-eth0_g0_13-21kworker/0:123:26:480
121650390irq/29-eth0_g0_13-21kworker/0:122:06:070
121650390irq/29-eth0_g0_11706-21df_abs21:04:310
121390ksoftirqd/1121650irq/29-eth0_g0_21:54:481
121390ksoftirqd/1121650irq/29-eth0_g0_21:54:481
121390ksoftirqd/1121650irq/29-eth0_g0_20:14:061
121390ksoftirqd/1121650irq/29-eth0_g0_00:28:051
1568899385cyclictest26280-21grep19:49:391
1568899381cyclictest9740-21grep20:54:391
1568899381cyclictest27491-21sed19:54:391
1568899381cyclictest27491-21sed19:54:391
121750380irq/30-eth0_g0_31ksoftirqd/000:02:480
121750380irq/30-eth0_g0_15738-21taskset23:33:081
121750380irq/30-eth0_g0_121ksoftirqd/123:22:471
121750380irq/30-eth0_g0_0-21swapper/123:27:071
121750380irq/30-eth0_g0_0-21swapper/100:19:181
121650380irq/29-eth0_g0_7644-21grep22:59:321
121650380irq/29-eth0_g0_31ksoftirqd/023:39:400
121650380irq/29-eth0_g0_31ksoftirqd/021:48:300
121650380irq/29-eth0_g0_1964-21runrttasks20:45:340
121650380irq/29-eth0_g0_13-21kworker/0:122:26:070
121650380irq/29-eth0_g0_13-21kworker/0:121:59:590
121650380irq/29-eth0_g0_13-21kworker/0:121:13:240
121650380irq/29-eth0_g0_13-21kworker/0:100:25:470
121650380irq/29-eth0_g0_121ksoftirqd/123:22:510
121650380irq/29-eth0_g0_121ksoftirqd/122:36:010
1568899372cyclictest19984-21zcat19:24:361
1568899371cyclictest1665-21wc22:34:361
121750370irq/30-eth0_g0_30625-21unixbench_singl22:19:411
121650370irq/29-eth0_g0_83562sleep023:02:500
121650370irq/29-eth0_g0_5582-21unixbench_singl22:49:390
121650370irq/29-eth0_g0_3370-21ntpdc20:29:350
121650370irq/29-eth0_g0_32126-21open_files20:14:330
121650370irq/29-eth0_g0_31ksoftirqd/021:37:060
121650370irq/29-eth0_g0_16159-21awk19:09:330
121650370irq/29-eth0_g0_13-21kworker/0:122:21:550
121650370irq/29-eth0_g0_13-21kworker/0:121:16:270
1568899361cyclictest7350-21grep20:44:391
1568899361cyclictest25527-21grep19:49:191
121750360irq/30-eth0_g0_15776-21/usr/sbin/munin19:09:321
121650360irq/29-eth0_g0_7891-21/usr/sbin/munin20:49:290
121650360irq/29-eth0_g0_5706-21sort20:39:320
121650360irq/29-eth0_g0_31ksoftirqd/022:32:140
121650360irq/29-eth0_g0_29977-21head20:04:380
121650360irq/29-eth0_g0_20989-21ls19:29:340
121650360irq/29-eth0_g0_1964-21runrttasks20:58:500
121650360irq/29-eth0_g0_1964-21runrttasks20:19:250
121650360irq/29-eth0_g0_1964-21runrttasks20:02:260
121650360irq/29-eth0_g0_1964-21runrttasks19:56:470
121650360irq/29-eth0_g0_1964-21runrttasks19:56:470
121650360irq/29-eth0_g0_1964-21runrttasks19:24:330
121650360irq/29-eth0_g0_1964-21runrttasks19:20:070
121650360irq/29-eth0_g0_13-21kworker/0:123:47:050
121650360irq/29-eth0_g0_13-21kworker/0:123:17:490
121650360irq/29-eth0_g0_13-21kworker/0:122:10:040
121650360irq/29-eth0_g0_13-21kworker/0:121:27:540
15688993520cyclictest22457-21sendmail_mailst19:34:401
1568899351cyclictest57282sleep120:39:331
1568899351cyclictest5407-21sort20:39:181
1568899351cyclictest3220-21chrt20:29:331
1568899351cyclictest29667-21grep20:04:341
1568899351cyclictest20690-21egrep19:29:291
1568899351cyclictest18478-21latency19:19:331
1568899351cyclictest17561-21swap19:14:381
121650350irq/29-eth0_g0_31124-21unixbench_multi20:09:390
121650350irq/29-eth0_g0_1964-21runrttasks20:36:420
121650350irq/29-eth0_g0_1964-21runrttasks19:38:050
117450350irq/72-mmc00-21swapper/121:07:011
1568899341cyclictest31868-21head22:24:401
1568899341cyclictest31786-21/usr/sbin/munin20:14:271
1568899341cyclictest28508-21ps19:59:371
1568899341cyclictest10868-21/usr/sbin/munin20:59:371
1568899341cyclictest10868-21/usr/sbin/munin20:59:371
121750340irq/30-eth0_g0_14864-21seq19:04:331
121650340irq/29-eth0_g0_1964-21runrttasks19:50:540
121650340irq/29-eth0_g0_1964-21runrttasks19:16:170
121650330irq/29-eth0_g0_23599-21proc_pri19:39:370
121650320irq/29-eth0_g0_1964-21runrttasks19:45:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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