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2026-06-13 - 11:01

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 Sat Jun 13, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1733521230sleep1121650irq/29-eth0_g0_22:36:261
121850ksoftirqd/1121750irq/30-eth0_g0_00:11:521
121810ksoftirqd/1121750irq/30-eth0_g0_21:37:450
121660ksoftirqd/1121750irq/30-eth0_g0_21:18:101
121590ksoftirqd/13103799cyclictest23:43:081
121590ksoftirqd/1121750irq/30-eth0_g0_23:50:231
121520ksoftirqd/1121750irq/30-eth0_g0_00:31:321
121510ksoftirqd/1121750irq/30-eth0_g0_23:34:210
114582510sleep1121750irq/30-eth0_g0_22:14:111
121500ksoftirqd/1121750irq/30-eth0_g0_23:33:521
121500ksoftirqd/1121750irq/30-eth0_g0_23:18:221
121650490irq/29-eth0_g0_31ksoftirqd/022:19:350
121650490irq/29-eth0_g0_31ksoftirqd/022:19:350
121480ksoftirqd/1121750irq/30-eth0_g0_00:06:291
121470ksoftirqd/1121750irq/30-eth0_g0_21:59:310
121470ksoftirqd/1121650irq/29-eth0_g0_22:15:040
125192460sleep1121750irq/30-eth0_g0_20:04:271
121450ksoftirqd/1121750irq/30-eth0_g0_22:22:421
121450ksoftirqd/1121750irq/30-eth0_g0_22:22:421
121650440irq/29-eth0_g0_30461-21chrt19:04:300
121650440irq/29-eth0_g0_30461-21chrt19:04:300
121440ksoftirqd/1121750irq/30-eth0_g0_22:00:291
121440ksoftirqd/1121750irq/30-eth0_g0_21:09:561
21632430sleep0121650irq/29-eth0_g0_23:47:370
121750430irq/30-eth0_g0_9903-21taskset22:05:201
121750430irq/30-eth0_g0_1219-21kworker/1:223:46:021
121650430irq/29-eth0_g0_24507-21df_abs20:54:230
121650430irq/29-eth0_g0_121ksoftirqd/100:19:310
121430ksoftirqd/1121650irq/29-eth0_g0_20:44:311
121430ksoftirqd/1121650irq/29-eth0_g0_20:44:311
121430ksoftirqd/1121650irq/29-eth0_g0_20:29:151
31037994214cyclictest1219-21kworker/1:222:33:301
121750420irq/30-eth0_g0_31ksoftirqd/021:54:240
121650420irq/29-eth0_g0_6626-21awk00:04:350
121650420irq/29-eth0_g0_31ksoftirqd/022:51:230
121650420irq/29-eth0_g0_31ksoftirqd/021:24:260
121650420irq/29-eth0_g0_13-21kworker/0:121:21:150
121420ksoftirqd/1121750irq/30-eth0_g0_21:27:031
121750410irq/30-eth0_g0_20775-21taskset22:49:321
121750410irq/30-eth0_g0_121ksoftirqd/121:50:121
121750410irq/30-eth0_g0_121ksoftirqd/121:24:031
121650410irq/29-eth0_g0_31ksoftirqd/022:48:210
121650410irq/29-eth0_g0_13-21kworker/0:123:00:010
121650410irq/29-eth0_g0_13-21kworker/0:122:24:580
121650410irq/29-eth0_g0_13-21kworker/0:122:24:580
121650410irq/29-eth0_g0_13-21kworker/0:100:01:280
121410ksoftirqd/1121750irq/30-eth0_g0_23:42:300
121410ksoftirqd/1121650irq/29-eth0_g0_23:37:281
3103799407cyclictest0-21swapper/100:34:291
3103799407cyclictest0-21swapper/100:34:291
3103799401cyclictest6106-21sed19:39:211
121750400irq/30-eth0_g0_4593-21ntpq21:44:281
121750400irq/30-eth0_g0_1219-21kworker/1:222:42:311
121750400irq/30-eth0_g0_1219-21kworker/1:200:21:251
121750400irq/30-eth0_g0_121ksoftirqd/122:25:531
121750400irq/30-eth0_g0_121ksoftirqd/122:25:531
121650400irq/29-eth0_g0_3103699cyclictest21:54:020
121650400irq/29-eth0_g0_1964-21runrttasks23:26:000
121650400irq/29-eth0_g0_17817-21df_inode22:39:220
121650400irq/29-eth0_g0_13-21kworker/0:123:50:110
121650400irq/29-eth0_g0_13-21kworker/0:123:20:450
121650400irq/29-eth0_g0_13-21kworker/0:123:07:300
121650400irq/29-eth0_g0_13-21kworker/0:122:05:160
121650400irq/29-eth0_g0_121ksoftirqd/122:47:251
121650400irq/29-eth0_g0_121ksoftirqd/121:47:240
121400ksoftirqd/1121650irq/29-eth0_g0_21:43:001
3103799391cyclictest13993-21tail20:09:321
121750390irq/30-eth0_g0_1219-21kworker/1:222:58:391
121750390irq/30-eth0_g0_1219-21kworker/1:200:02:441
121750390irq/30-eth0_g0_121ksoftirqd/121:35:101
121650390irq/29-eth0_g0_31ksoftirqd/021:40:110
121650390irq/29-eth0_g0_1964-21runrttasks21:33:140
121650390irq/29-eth0_g0_1964-21runrttasks21:33:140
121650390irq/29-eth0_g0_13-21kworker/0:123:29:230
121650390irq/29-eth0_g0_13-21kworker/0:123:15:370
121650390irq/29-eth0_g0_13-21kworker/0:123:09:300
121650390irq/29-eth0_g0_13-21kworker/0:122:32:120
121650390irq/29-eth0_g0_121ksoftirqd/122:56:160
121390ksoftirqd/1121750irq/30-eth0_g0_21:13:360
121390ksoftirqd/1121750irq/30-eth0_g0_00:14:430
121390ksoftirqd/1121650irq/29-eth0_g0_19:09:311
3103799382cyclictest9204-21unixbench_singl00:14:331
3103799381cyclictest27953-21diskmemload23:19:321
3103799381cyclictest160702sleep120:19:231
121750380irq/30-eth0_g0_31ksoftirqd/022:36:310
121750380irq/30-eth0_g0_0-21swapper/121:04:341
121650380irq/29-eth0_g0_1964-21runrttasks19:56:010
121650380irq/29-eth0_g0_1964-21runrttasks00:37:370
121650380irq/29-eth0_g0_1964-21runrttasks00:37:370
121650380irq/29-eth0_g0_13056-21taskset00:31:080
121650380irq/29-eth0_g0_13-21kworker/0:123:55:480
121650380irq/29-eth0_g0_13-21kworker/0:121:18:190
121650380irq/29-eth0_g0_11669-21unixbench_singl00:24:320
121380ksoftirqd/1121650irq/29-eth0_g0_00:26:461
3103799371cyclictest23573-21taskset20:49:271
3103799371cyclictest15053-21grep20:14:291
3103799371cyclictest15053-21grep20:14:291
121750370irq/30-eth0_g0_9200-21/usr/sbin/munin19:49:321
121750370irq/30-eth0_g0_7780-21sh21:59:111
121750370irq/30-eth0_g0_1219-21kworker/1:223:25:351
121750370irq/30-eth0_g0_1219-21kworker/1:223:04:341
121750370irq/30-eth0_g0_1219-21kworker/1:221:31:181
121750370irq/30-eth0_g0_1219-21kworker/1:221:31:181
121750370irq/30-eth0_g0_121ksoftirqd/123:12:521
121750370irq/30-eth0_g0_121ksoftirqd/123:02:321
121650370irq/29-eth0_g0_7893-21ls00:09:310
121650370irq/29-eth0_g0_32346-21/usr/sbin/munin19:14:230
121650370irq/29-eth0_g0_3103799cyclictest19:14:301
121650370irq/29-eth0_g0_30735-21runrttasks19:05:481
121650370irq/29-eth0_g0_30735-21runrttasks19:05:481
121650370irq/29-eth0_g0_1964-21runrttasks20:30:260
121650370irq/29-eth0_g0_121ksoftirqd/122:17:141
121650370irq/29-eth0_g0_0-21swapper/022:10:500
3103799362cyclictest7990-21vmstat19:44:331
3103799361cyclictest247692sleep120:54:291
3103799361cyclictest10367-21unixbench_multi19:54:331
121650360irq/29-eth0_g0_5180-21netstat19:34:270
121650360irq/29-eth0_g0_23572-21/usr/sbin/munin20:49:270
121650360irq/29-eth0_g0_22449-21taskset20:44:290
121650360irq/29-eth0_g0_22449-21taskset20:44:290
121650360irq/29-eth0_g0_20836-21df_abs20:39:220
121650360irq/29-eth0_g0_1964-21runrttasks20:26:400
121650360irq/29-eth0_g0_1964-21runrttasks20:23:530
121650360irq/29-eth0_g0_1964-21runrttasks20:18:540
121650360irq/29-eth0_g0_1964-21runrttasks20:18:540
121650360irq/29-eth0_g0_1964-21runrttasks20:09:110
121650360irq/29-eth0_g0_1964-21runrttasks19:39:150
121650360irq/29-eth0_g0_1449-21missed_timers19:19:250
121360ksoftirqd/1121750irq/30-eth0_g0_23:56:471
3103799351cyclictest4287-21grep19:29:331
3103799351cyclictest25918-21cat20:59:261
3103799351cyclictest209382sleep120:39:251
3103799351cyclictest17355-21missed_timers20:24:241
121750350irq/30-eth0_g0_5464-21unixbench_multi19:34:321
121750350irq/30-eth0_g0_19549-21df_abs20:34:211
121650350irq/29-eth0_g0_9034-21sendmail_mailtr19:49:310
121650350irq/29-eth0_g0_32266-21latency_hist19:14:110
121650350irq/29-eth0_g0_31ksoftirqd/020:59:260
121650350irq/29-eth0_g0_1964-21runrttasks19:48:520
121650350irq/29-eth0_g0_13712-21runrttasks20:09:260
3103799341cyclictest1949-21taskset19:20:271
121650340irq/29-eth0_g0_3969-21ntp_kernel_err19:29:270
121650340irq/29-eth0_g0_26890-21df_abs21:04:230
121650340irq/29-eth0_g0_2650-21/usr/sbin/munin19:24:260
3103799332cyclictest2631-21cat19:24:251
3103799331cyclictest11602-21unixbench_singl19:59:331
121750330irq/30-eth0_g0_1964-21runrttasks19:59:360
121650320irq/29-eth0_g0_20073-21timerandwakeup20:34:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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