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2026-08-21 - 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 100 highest latencies:
System rack3slot5s.osadl.org (updated Fri Aug 21, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2142821260sleep0121650irq/29-eth0_g0_11:44:230
2213721000sleep0121650irq/29-eth0_g0_09:36:010
232642900sleep1121650irq/29-eth0_g0_09:39:551
318292670sleep1121650irq/29-eth0_g0_10:14:431
65592600sleep0121650irq/29-eth0_g0_10:42:270
233902580sleep0121650irq/29-eth0_g0_11:51:460
121550ksoftirqd/1121750irq/30-eth0_g0_10:21:340
206232510sleep1121750irq/30-eth0_g0_09:27:401
121510ksoftirqd/1121750irq/30-eth0_g0_11:58:561
121500ksoftirqd/1121650irq/29-eth0_g0_10:10:040
121490ksoftirqd/1121650irq/29-eth0_g0_10:28:440
121490ksoftirqd/1121650irq/29-eth0_g0_10:28:440
121650480irq/29-eth0_g0_11546-21missed_timers08:51:390
121650480irq/29-eth0_g0_11546-21missed_timers08:51:390
121750470irq/30-eth0_g0_1219-21kworker/1:211:47:061
121750470irq/30-eth0_g0_1219-21kworker/1:211:47:061
121470ksoftirqd/1121750irq/30-eth0_g0_12:08:401
121460ksoftirqd/1121750irq/30-eth0_g0_11:14:251
121460ksoftirqd/1121750irq/30-eth0_g0_11:14:251
121450ksoftirqd/1121750irq/30-eth0_g0_09:25:091
121450ksoftirqd/1121750irq/30-eth0_g0_07:26:431
121450ksoftirqd/1121650irq/29-eth0_g0_11:37:211
121750440irq/30-eth0_g0_1219-21kworker/1:209:31:401
121650440irq/29-eth0_g0_776-21latency_hist10:21:240
121650440irq/29-eth0_g0_7052-21df10:46:330
121440ksoftirqd/1121650irq/29-eth0_g0_12:17:290
121440ksoftirqd/1121650irq/29-eth0_g0_10:36:091
287202430chrt121750irq/30-eth0_g0_12:13:360
256172430sleep0121750irq/30-eth0_g0_09:48:470
121750430irq/30-eth0_g0_1219-21kworker/1:210:54:381
121650430irq/29-eth0_g0_30902-21unixbench_multi12:21:420
121650430irq/29-eth0_g0_31ksoftirqd/011:34:370
20072420sleep1121750irq/30-eth0_g0_08:11:431
121750420irq/30-eth0_g0_1219-21kworker/1:209:16:241
121650420irq/29-eth0_g0_13-21kworker/0:110:15:130
121650420irq/29-eth0_g0_13-21kworker/0:109:29:030
121650420irq/29-eth0_g0_13-21kworker/0:109:08:360
121420ksoftirqd/1121650irq/29-eth0_g0_10:41:391
195322410chrt121650irq/29-eth0_g0_09:24:120
121750410irq/30-eth0_g0_1219-21kworker/1:210:58:541
121750410irq/30-eth0_g0_1219-21kworker/1:209:52:451
121650410irq/29-eth0_g0_1964-21runrttasks07:03:200
121650410irq/29-eth0_g0_13-21kworker/0:111:20:170
121650410irq/29-eth0_g0_13-21kworker/0:111:05:220
121650410irq/29-eth0_g0_13-21kworker/0:109:51:550
121650410irq/29-eth0_g0_13-21kworker/0:109:39:210
43802400sleep0121650irq/29-eth0_g0_10:35:330
1785999402cyclictest10399-21/usr/sbin/munin08:46:401
1785999402cyclictest10399-21/usr/sbin/munin08:46:401
121750400irq/30-eth0_g0_1219-21kworker/1:210:50:311
121750400irq/30-eth0_g0_1219-21kworker/1:210:01:351
121750400irq/30-eth0_g0_1219-21kworker/1:209:48:191
121750400irq/30-eth0_g0_0-21swapper/112:05:411
121650400irq/29-eth0_g0_31ksoftirqd/011:24:290
121650400irq/29-eth0_g0_31ksoftirqd/010:01:450
121650400irq/29-eth0_g0_13-21kworker/0:112:27:130
121650400irq/29-eth0_g0_13-21kworker/0:111:10:490
121650400irq/29-eth0_g0_13-21kworker/0:109:20:140
121650400irq/29-eth0_g0_13-21kworker/0:109:12:060
121750390irq/30-eth0_g0_1219-21kworker/1:211:21:391
121750390irq/30-eth0_g0_1219-21kworker/1:211:06:441
121750390irq/30-eth0_g0_121ksoftirqd/112:12:251
121750390irq/30-eth0_g0_121ksoftirqd/111:44:341
121650390irq/29-eth0_g0_31ksoftirqd/011:58:040
121650390irq/29-eth0_g0_31ksoftirqd/011:27:590
121650390irq/29-eth0_g0_31ksoftirqd/010:00:370
121650390irq/29-eth0_g0_31ksoftirqd/008:21:380
121650390irq/29-eth0_g0_13-21kworker/0:112:35:300
121650390irq/29-eth0_g0_13-21kworker/0:111:50:200
121650390irq/29-eth0_g0_13-21kworker/0:111:50:200
121650390irq/29-eth0_g0_13-21kworker/0:111:12:370
121650390irq/29-eth0_g0_13-21kworker/0:111:12:370
121650390irq/29-eth0_g0_13-21kworker/0:110:52:470
121650390irq/29-eth0_g0_13-21kworker/0:110:36:280
121650390irq/29-eth0_g0_13-21kworker/0:109:42:360
121390ksoftirqd/1121650irq/29-eth0_g0_12:22:131
121390ksoftirqd/1121650irq/29-eth0_g0_11:16:381
121390ksoftirqd/1121650irq/29-eth0_g0_09:43:451
1785999383cyclictest1983-21/usr/sbin/munin07:57:371
1785999381cyclictest7038-21unixbench_singl08:31:461
1785999381cyclictest326142sleep108:06:241
1785999381cyclictest253592sleep107:36:341
1785999381cyclictest152912sleep109:06:381
121750380irq/30-eth0_g0_4007-21seq08:21:341
121750380irq/30-eth0_g0_1219-21kworker/1:212:32:371
121750380irq/30-eth0_g0_1219-21kworker/1:212:28:301
121750380irq/30-eth0_g0_121ksoftirqd/112:17:231
121750380irq/30-eth0_g0_121ksoftirqd/111:56:171
121750380irq/30-eth0_g0_121ksoftirqd/111:32:021
121750380irq/30-eth0_g0_0-21swapper/110:06:241
121650380irq/29-eth0_g0_27752-21/usr/sbin/munin07:46:380
121650380irq/29-eth0_g0_27716-21latency_hist07:46:240
121650380irq/29-eth0_g0_13-21kworker/0:111:37:500
121650380irq/29-eth0_g0_10109-21unixbench_multi10:56:440
1785999372cyclictest12764-21memory08:56:381
1785999371cyclictest32647-21cat10:16:441
1785999371cyclictest20069-21sshd07:13:381
1785999371cyclictest1927-21taskset10:25:401
1785999371cyclictest14824-21diskmemload09:06:231
1785999371cyclictest14824-21diskmemload09:06:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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