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2026-08-13 - 15:53

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 Thu Aug 13, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2482121010sleep0121650irq/29-eth0_g0_09:40:140
121820ksoftirqd/1121750irq/30-eth0_g0_09:21:210
244572740sleep1121650irq/29-eth0_g0_11:51:441
194262740sleep0121750irq/30-eth0_g0_11:31:030
121670ksoftirqd/1121750irq/30-eth0_g0_08:17:030
282732660sleep0121650irq/29-eth0_g0_09:52:350
309532570sleep1121750irq/30-eth0_g0_10:05:171
14952540sleep1121750irq/30-eth0_g0_12:28:461
267752530sleep1121650irq/29-eth0_g0_12:01:041
121530ksoftirqd/1121750irq/30-eth0_g0_08:22:031
205842520sleep0121750irq/30-eth0_g0_11:35:160
107702500sleep0121650irq/29-eth0_g0_10:55:080
121490ksoftirqd/1121750irq/30-eth0_g0_12:32:461
121490ksoftirqd/1121750irq/30-eth0_g0_11:40:351
121490ksoftirqd/1121750irq/30-eth0_g0_11:40:351
121480ksoftirqd/1121750irq/30-eth0_g0_09:28:201
121650470irq/29-eth0_g0_210782sleep009:24:240
121470ksoftirqd/1121650irq/29-eth0_g0_08:57:351
284972450sleep1121750irq/30-eth0_g0_09:55:141
121650450irq/29-eth0_g0_13-21kworker/0:109:59:050
121650450irq/29-eth0_g0_11636-21unixbench_multi10:57:040
121450ksoftirqd/1121650irq/29-eth0_g0_08:01:051
121750440irq/30-eth0_g0_1219-21kworker/1:210:48:281
121650440irq/29-eth0_g0_20001-21sendmail_mailqu07:07:020
121650440irq/29-eth0_g0_20001-21sendmail_mailqu07:07:020
121650440irq/29-eth0_g0_13-21kworker/0:110:39:070
121650440irq/29-eth0_g0_13-21kworker/0:110:39:070
121440ksoftirqd/1121650irq/29-eth0_g0_08:34:041
121440ksoftirqd/1121650irq/29-eth0_g0_07:08:501
121440ksoftirqd/1121650irq/29-eth0_g0_07:08:501
166532430sleep1121650irq/29-eth0_g0_11:17:191
121650430irq/29-eth0_g0_2556-21df_abs10:21:540
121650430irq/29-eth0_g0_18361-21df_abs07:01:550
121430ksoftirqd/1121650irq/29-eth0_g0_12:17:061
121430ksoftirqd/1121650irq/29-eth0_g0_12:12:061
121430ksoftirqd/1121650irq/29-eth0_g0_12:12:061
121430ksoftirqd/1121650irq/29-eth0_g0_09:31:220
121430ksoftirqd/1121650irq/29-eth0_g0_07:52:061
121750420irq/30-eth0_g0_1219-21kworker/1:212:24:071
121750420irq/30-eth0_g0_1219-21kworker/1:209:16:111
121650420irq/29-eth0_g0_31ksoftirqd/011:21:420
121650420irq/29-eth0_g0_2325-21proc_pri12:32:020
121650420irq/29-eth0_g0_1964-21runrttasks07:51:160
121650420irq/29-eth0_g0_13-21kworker/0:111:59:350
121650420irq/29-eth0_g0_13-21kworker/0:111:12:260
121650420irq/29-eth0_g0_13-21kworker/0:110:46:460
121420ksoftirqd/1121650irq/29-eth0_g0_09:43:251
1937299411cyclictest22603-21timerandwakeup11:42:011
121750410irq/30-eth0_g0_1219-21kworker/1:209:41:411
121750410irq/30-eth0_g0_121ksoftirqd/111:28:321
121650410irq/29-eth0_g0_13451-21/usr/sbin/munin11:06:590
121650410irq/29-eth0_g0_13-21kworker/0:111:53:240
121650410irq/29-eth0_g0_13-21kworker/0:111:02:320
121650410irq/29-eth0_g0_121ksoftirqd/110:11:431
121750400irq/30-eth0_g0_6655-21/usr/sbin/munin08:27:001
121650400irq/29-eth0_g0_31ksoftirqd/011:51:240
121650400irq/29-eth0_g0_31ksoftirqd/010:17:020
121650400irq/29-eth0_g0_13-21kworker/0:112:20:210
121650400irq/29-eth0_g0_13-21kworker/0:112:15:480
121650400irq/29-eth0_g0_13-21kworker/0:112:15:480
121650400irq/29-eth0_g0_13-21kworker/0:111:23:150
121650400irq/29-eth0_g0_13-21kworker/0:110:42:570
121650400irq/29-eth0_g0_13-21kworker/0:110:36:430
121650400irq/29-eth0_g0_13-21kworker/0:110:13:440
121650400irq/29-eth0_g0_121ksoftirqd/109:48:140
121400ksoftirqd/1121650irq/29-eth0_g0_09:02:231
19372993910cyclictest0-21swapper/111:51:141
1937299391cyclictest66762sleep110:37:051
1937299391cyclictest66762sleep110:37:051
121750390irq/30-eth0_g0_1219-21kworker/1:211:32:181
121750390irq/30-eth0_g0_1219-21kworker/1:211:02:161
121750390irq/30-eth0_g0_1219-21kworker/1:210:24:531
121650390irq/29-eth0_g0_26784-21latency_hist07:36:440
121650390irq/29-eth0_g0_22091-21sed11:41:510
121650390irq/29-eth0_g0_2126-21lldpd09:00:510
121650390irq/29-eth0_g0_13-21kworker/0:112:22:040
121650390irq/29-eth0_g0_13-21kworker/0:112:04:150
121650390irq/29-eth0_g0_13-21kworker/0:111:37:370
121650390irq/29-eth0_g0_13-21kworker/0:111:37:370
121650390irq/29-eth0_g0_13-21kworker/0:110:07:140
121650390irq/29-eth0_g0_0-21swapper/009:16:420
121390ksoftirqd/1121650irq/29-eth0_g0_12:07:421
121390ksoftirqd/1121650irq/29-eth0_g0_08:55:491
121390ksoftirqd/1121650irq/29-eth0_g0_07:39:231
121390ksoftirqd/1121650irq/29-eth0_g0_07:27:081
121390ksoftirqd/1121650irq/29-eth0_g0_07:12:481
1937299387cyclictest121750irq/30-eth0_g0_10:21:111
121750380irq/30-eth0_g0_1219-21kworker/1:212:04:441
121750380irq/30-eth0_g0_1219-21kworker/1:210:26:491
121750380irq/30-eth0_g0_121ksoftirqd/111:12:041
121750380irq/30-eth0_g0_121ksoftirqd/110:55:151
121750380irq/30-eth0_g0_0-21swapper/107:23:041
121650380irq/29-eth0_g0_25727-21sed09:42:050
121650380irq/29-eth0_g0_22303-21ntp_offset07:17:000
121650380irq/29-eth0_g0_16378-21diskmemload10:01:570
121650380irq/29-eth0_g0_13-21kworker/0:112:27:330
121650380irq/29-eth0_g0_13-21kworker/0:112:08:520
121650380irq/29-eth0_g0_13-21kworker/0:109:32:140
121650380irq/29-eth0_g0_121ksoftirqd/109:35:101
121650380irq/29-eth0_g0_0-21swapper/008:31:430
121380ksoftirqd/1121650irq/29-eth0_g0_10:59:511
121380ksoftirqd/1121650irq/29-eth0_g0_09:07:221
121380ksoftirqd/1121650irq/29-eth0_g0_08:10:581
121380ksoftirqd/1121650irq/29-eth0_g0_07:17:301
1937299372cyclictest9730-21unixbench_multi08:37:031
1937299372cyclictest10492-21entropy08:41:531
1937299372cyclictest10492-21entropy08:41:531
1937299371cyclictest20200-21cpu09:21:531
1937299371cyclictest0-21swapper/109:51:301
1937299370cyclictest0-21swapper/108:18:111
121750370irq/30-eth0_g0_1219-21kworker/1:211:23:121
121750370irq/30-eth0_g0_1219-21kworker/1:210:35:301
121750370irq/30-eth0_g0_1219-21kworker/1:210:15:581
121750370irq/30-eth0_g0_0-21swapper/109:58:311
121750370irq/30-eth0_g0_0-21swapper/107:31:541
121650370irq/29-eth0_g0_8566-21unixbench_singl08:32:030
121650370irq/29-eth0_g0_2126-21lldpd08:54:510
121650370irq/29-eth0_g0_1964-21runrttasks07:30:230
121650370irq/29-eth0_g0_15793-21mailstats09:02:020
121650370irq/29-eth0_g0_121ksoftirqd/110:44:081
121650370irq/29-eth0_g0_0-21swapper/010:28:370
1937299361cyclictest28594-21sendmail_mailtr07:42:021
1937299361cyclictest19593-21unixbench_singl09:17:051
1937299361cyclictest14111-21unixbench_multi11:07:031
1937299361cyclictest0-21swapper/108:13:341
1937299361cyclictest0-21swapper/108:13:341
121750360irq/30-eth0_g0_18226-21/usr/sbin/munin07:02:061
121650360irq/29-eth0_g0_549-21df_abs08:01:520
121650360irq/29-eth0_g0_31968-21sort07:56:580
121650360irq/29-eth0_g0_31066-21timerandwakeup07:52:020
121650360irq/29-eth0_g0_1964-21runrttasks08:51:090
121650360irq/29-eth0_g0_1964-21runrttasks08:07:170
121650360irq/29-eth0_g0_13-21kworker/0:109:06:590
1937299351cyclictest11622-21df_abs08:46:521
121750350irq/30-eth0_g0_5722-21memory08:21:570
121650350irq/29-eth0_g0_1964-21runrttasks08:14:280
121650350irq/29-eth0_g0_1964-21runrttasks08:14:280
121650350irq/29-eth0_g0_1964-21runrttasks07:22:500
1937299341cyclictest1152-21grep08:02:021
121650340irq/29-eth0_g0_27112-21memory07:36:590
121650340irq/29-eth0_g0_20900-21/usr/sbin/munin07:11:560
1937299332cyclictest0-21swapper/107:46:581
121650330irq/29-eth0_g0_9321-21cat08:36:550
121650330irq/29-eth0_g0_28363-21sort07:41:570
121650330irq/29-eth0_g0_11528-21latency_hist08:46:440
121650330irq/29-eth0_g0_11528-21latency_hist08:46:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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