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2026-07-24 - 05:15

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 all highest latencies:
System rack3slot5s.osadl.org (updated Fri Jul 24, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2292721240chrt121650irq/29-eth0_g0_00:29:120
16722960sleep1121750irq/30-eth0_g0_23:02:511
236952910sleep0121650irq/29-eth0_g0_22:22:020
121840ksoftirqd/1121750irq/30-eth0_g0_20:34:471
121830ksoftirqd/1121750irq/30-eth0_g0_20:02:321
121810ksoftirqd/1121750irq/30-eth0_g0_20:42:511
121810ksoftirqd/1121650irq/29-eth0_g0_21:07:550
305212750sleep0121750irq/30-eth0_g0_22:47:540
206862740sleep1121650irq/29-eth0_g0_00:21:371
121740ksoftirqd/1121750irq/30-eth0_g0_19:12:541
121720ksoftirqd/1121750irq/30-eth0_g0_20:32:321
319802700sleep1121750irq/30-eth0_g0_22:53:331
121700ksoftirqd/1121750irq/30-eth0_g0_20:22:531
32232680sleep1121750irq/30-eth0_g0_23:08:171
320002670sleep0121750irq/30-eth0_g0_22:53:470
121510ksoftirqd/1121650irq/29-eth0_g0_19:37:510
124542490chrt121650irq/29-eth0_g0_21:34:431
121490ksoftirqd/1121650irq/29-eth0_g0_23:59:290
247732480sleep0121750irq/30-eth0_g0_22:25:200
121470ksoftirqd/1121750irq/30-eth0_g0_23:59:451
121470ksoftirqd/1121750irq/30-eth0_g0_22:12:181
121460ksoftirqd/1121750irq/30-eth0_g0_23:37:440
121460ksoftirqd/1121750irq/30-eth0_g0_23:34:371
121750450irq/30-eth0_g0_24908-21seq22:26:541
121750450irq/30-eth0_g0_1219-21kworker/1:222:20:011
121450ksoftirqd/1121750irq/30-eth0_g0_20:36:310
121450ksoftirqd/1121650irq/29-eth0_g0_23:40:021
121440ksoftirqd/1121750irq/30-eth0_g0_23:03:580
121440ksoftirqd/1121750irq/30-eth0_g0_22:59:200
121750430irq/30-eth0_g0_121ksoftirqd/123:16:331
121650430irq/29-eth0_g0_1964-21runrttasks23:53:080
121430ksoftirqd/1117450irq/72-mmc022:51:401
197432420sleep15329-21diskmemload22:03:531
121750420irq/30-eth0_g0_1219-21kworker/1:223:26:571
121750420irq/30-eth0_g0_1219-21kworker/1:222:37:101
121750420irq/30-eth0_g0_1219-21kworker/1:221:48:171
121750420irq/30-eth0_g0_1219-21kworker/1:221:45:311
121750420irq/30-eth0_g0_1219-21kworker/1:200:22:531
121750420irq/30-eth0_g0_1219-21kworker/1:200:22:531
121750420irq/30-eth0_g0_121ksoftirqd/123:27:441
121750420irq/30-eth0_g0_121ksoftirqd/123:19:521
121420ksoftirqd/1121750irq/30-eth0_g0_22:44:031
121420ksoftirqd/1121750irq/30-eth0_g0_22:39:240
121750410irq/30-eth0_g0_121ksoftirqd/100:30:501
121410ksoftirqd/1121750irq/30-eth0_g0_23:37:230
121750400irq/30-eth0_g0_1219-21kworker/1:222:00:461
121750400irq/30-eth0_g0_1219-21kworker/1:222:00:461
121750400irq/30-eth0_g0_1219-21kworker/1:200:36:591
121650400irq/29-eth0_g0_13-21kworker/0:122:14:210
121650400irq/29-eth0_g0_13-21kworker/0:121:37:520
121650400irq/29-eth0_g0_13-21kworker/0:100:20:210
121650400irq/29-eth0_g0_13-21kworker/0:100:14:240
121650400irq/29-eth0_g0_11762-21/usr/sbin/munin23:42:530
121400ksoftirqd/1121750irq/30-eth0_g0_23:12:330
121400ksoftirqd/1121750irq/30-eth0_g0_21:44:430
121400ksoftirqd/1121650irq/29-eth0_g0_20:11:590
121400ksoftirqd/1121650irq/29-eth0_g0_20:11:590
121400ksoftirqd/1121650irq/29-eth0_g0_19:42:441
121750390irq/30-eth0_g0_1219-21kworker/1:222:30:411
121750390irq/30-eth0_g0_1219-21kworker/1:221:57:271
121750390irq/30-eth0_g0_121ksoftirqd/123:52:041
121750390irq/30-eth0_g0_0-21swapper/122:39:071
121650390irq/29-eth0_g0_31ksoftirqd/022:10:370
121650390irq/29-eth0_g0_24974-21unixbench_multi20:12:530
121650390irq/29-eth0_g0_1964-21runrttasks19:06:030
121650390irq/29-eth0_g0_17358-21ntp_offset19:42:490
121650390irq/29-eth0_g0_13-21kworker/0:123:10:090
121650390irq/29-eth0_g0_13-21kworker/0:122:44:400
121650390irq/29-eth0_g0_13-21kworker/0:121:54:060
121650390irq/29-eth0_g0_13-21kworker/0:121:34:070
121650390irq/29-eth0_g0_13-21kworker/0:121:13:130
121650390irq/29-eth0_g0_121ksoftirqd/123:25:320
121390ksoftirqd/186752sleep021:18:340
121390ksoftirqd/1121650irq/29-eth0_g0_20:48:431
828399388cyclictest0-21swapper/119:27:461
121750380irq/30-eth0_g0_1219-21kworker/1:222:57:441
121750380irq/30-eth0_g0_1219-21kworker/1:222:12:361
121750380irq/30-eth0_g0_1219-21kworker/1:221:07:321
121750380irq/30-eth0_g0_1219-21kworker/1:200:16:171
121750380irq/30-eth0_g0_1219-21kworker/1:200:11:501
121750380irq/30-eth0_g0_1219-21kworker/1:200:04:521
121750380irq/30-eth0_g0_11177-21df_abs23:42:431
121750380irq/30-eth0_g0_0-21swapper/121:40:501
121650380irq/29-eth0_g0_7837-21/usr/sbin/munin23:27:500
121650380irq/29-eth0_g0_31ksoftirqd/019:27:490
121650380irq/29-eth0_g0_18073-21sshd21:57:480
121650380irq/29-eth0_g0_18073-21sshd21:57:480
121650380irq/29-eth0_g0_13-21kworker/0:123:49:410
121650380irq/29-eth0_g0_13-21kworker/0:121:27:360
121650380irq/29-eth0_g0_121ksoftirqd/122:30:470
121650380irq/29-eth0_g0_121ksoftirqd/121:22:481
121750370irq/30-eth0_g0_1219-21kworker/1:223:55:561
121750370irq/30-eth0_g0_1219-21kworker/1:221:16:071
121750370irq/30-eth0_g0_121ksoftirqd/121:21:401
121650370irq/29-eth0_g0_31ksoftirqd/022:32:560
121650370irq/29-eth0_g0_27090-21missed_timers20:22:470
121650370irq/29-eth0_g0_25969-21open_files20:17:480
121650370irq/29-eth0_g0_16110-21df_inode00:02:460
121650370irq/29-eth0_g0_15398-21df_inode21:47:450
121650370irq/29-eth0_g0_13-21kworker/0:100:24:200
121650370irq/29-eth0_g0_13-21kworker/0:100:24:200
121370ksoftirqd/1121650irq/29-eth0_g0_19:52:321
121750360irq/30-eth0_g0_1219-21kworker/1:221:28:531
121650360irq/29-eth0_g0_24002-21unixbench_singl00:32:540
121650360irq/29-eth0_g0_1964-21runrttasks19:07:530
121650360irq/29-eth0_g0_19592-21forks19:52:460
121650360irq/29-eth0_g0_17865-21unixbench_singl00:07:550
121650360irq/29-eth0_g0_13-21kworker/0:122:03:070
121650350irq/29-eth0_g0_9924-21cat19:12:480
121650350irq/29-eth0_g0_7978-21runrttasks19:04:061
121650350irq/29-eth0_g0_763-21memory20:47:470
121650350irq/29-eth0_g0_4326-21sed21:02:450
121650350irq/29-eth0_g0_3568-21timerandwakeup20:57:530
121650350irq/29-eth0_g0_32023-21missed_timers20:42:500
121650350irq/29-eth0_g0_22341-21proc_pri20:02:510
121650350irq/29-eth0_g0_2093-21snmpd19:22:530
121650350irq/29-eth0_g0_1964-21runrttasks23:21:200
121650350irq/29-eth0_g0_1964-21runrttasks20:53:260
121650350irq/29-eth0_g0_1964-21runrttasks20:30:420
121650350irq/29-eth0_g0_1964-21runrttasks19:18:301
121650350irq/29-eth0_g0_18468-21latency19:47:480
121350ksoftirqd/1121750irq/30-eth0_g0_21:23:040
121350ksoftirqd/1121750irq/30-eth0_g0_19:54:201
32712340sleep13279-21sed20:57:481
121750340irq/30-eth0_g0_12190-21df_abs19:22:451
121650340irq/29-eth0_g0_31159-21sed20:37:540
121650340irq/29-eth0_g0_1964-21runrttasks19:58:420
121650340irq/29-eth0_g0_14832-21missed_timers19:32:480
828399331cyclictest310882sleep120:37:531
121650330irq/29-eth0_g0_10896-21df_abs19:17:460
121750320irq/30-eth0_g0_1964-21runrttasks19:32:521
121750320irq/30-eth0_g0_0-21swapper/120:02:551
121650320irq/29-eth0_g0_2274-21fgrep20:52:521
242382310sleep124237-21munin-run20:12:321
242382310sleep124237-21munin-run20:12:321
121650310irq/29-eth0_g0_9297-21runrttasks19:10:041
121310ksoftirqd/125361-21taskset20:16:211
121310ksoftirqd/1121650irq/29-eth0_g0_20:21:391
121750300irq/30-eth0_g0_0-21swapper/121:04:091
121290ksoftirqd/1121750irq/30-eth0_g0_19:37:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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