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2026-04-05 - 16:59

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 376 highest latencies:
System rack3slot5s.osadl.org (updated Sun Apr 05, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121950ksoftirqd/1121750irq/30-eth0_g0_09:17:241
121790ksoftirqd/1121750irq/30-eth0_g0_10:59:521
121670ksoftirqd/1562399cyclictest12:30:101
121650ksoftirqd/1121650irq/29-eth0_g0_08:24:341
317692590sleep1121650irq/29-eth0_g0_11:05:351
121570ksoftirqd/1121750irq/30-eth0_g0_09:34:481
121570ksoftirqd/1121750irq/30-eth0_g0_09:34:481
121550ksoftirqd/1121750irq/30-eth0_g0_08:24:451
121540ksoftirqd/1121750irq/30-eth0_g0_09:11:041
121530ksoftirqd/1121750irq/30-eth0_g0_11:30:261
121530ksoftirqd/1121650irq/29-eth0_g0_07:04:481
121520ksoftirqd/1121750irq/30-eth0_g0_09:58:021
121650500irq/29-eth0_g0_562399cyclictest07:14:561
121650500irq/29-eth0_g0_562399cyclictest07:14:561
244452490sleep1121650irq/29-eth0_g0_10:35:591
121490ksoftirqd/1121650irq/29-eth0_g0_09:47:240
5623994812cyclictest2130-21sort09:04:551
562399481cyclictest13713-21unixbench_multi07:39:551
121650480irq/29-eth0_g0_7577-21latency_hist09:29:340
121650480irq/29-eth0_g0_562399cyclictest10:04:361
121480ksoftirqd/1121750irq/30-eth0_g0_12:19:511
121480ksoftirqd/1121750irq/30-eth0_g0_11:59:551
121480ksoftirqd/1121750irq/30-eth0_g0_11:34:521
121480ksoftirqd/1121650irq/29-eth0_g0_10:24:521
121480ksoftirqd/1121650irq/29-eth0_g0_09:34:220
121750470irq/30-eth0_g0_121ksoftirqd/110:10:101
121470ksoftirqd/1121750irq/30-eth0_g0_10:54:451
91682460sleep0121650irq/29-eth0_g0_11:45:300
5623994629cyclictest26971-21ntpq08:34:511
5623994613cyclictest18303-21taskset07:59:491
121750460irq/30-eth0_g0_562399cyclictest11:41:401
121750460irq/30-eth0_g0_562399cyclictest11:17:581
121460ksoftirqd/1562399cyclictest09:34:321
121460ksoftirqd/1121750irq/30-eth0_g0_09:20:221
121460ksoftirqd/1121650irq/29-eth0_g0_08:49:540
5623994532cyclictest4001-21sendmail_mailqu11:24:511
5623994529cyclictest16428-21grep12:14:531
562399451cyclictest13953-21unixbench_multi12:04:561
121750450irq/30-eth0_g0_562399cyclictest09:59:481
121750450irq/30-eth0_g0_121ksoftirqd/110:33:551
121650450irq/29-eth0_g0_2704-21proc_pri11:19:510
121650450irq/29-eth0_g0_13-21kworker/0:111:01:190
121650450irq/29-eth0_g0_11972-21crond11:59:330
121450ksoftirqd/1121750irq/30-eth0_g0_10:33:160
562399442cyclictest17387-21unixbench_multi07:54:561
562399441cyclictest5716-21/usr/sbin/munin07:09:511
121750440irq/30-eth0_g0_562399cyclictest09:25:001
121750440irq/30-eth0_g0_121ksoftirqd/111:54:511
121750440irq/30-eth0_g0_121ksoftirqd/110:14:401
121440ksoftirqd/1121750irq/30-eth0_g0_11:46:261
5623994314cyclictest0-21swapper/107:24:371
5623994313cyclictest29337-21grep08:44:491
5623994313cyclictest28747-21runrttasks08:42:191
121750430irq/30-eth0_g0_562399cyclictest10:45:481
121750430irq/30-eth0_g0_562399cyclictest09:45:181
121750430irq/30-eth0_g0_121ksoftirqd/111:24:121
121650430irq/29-eth0_g0_5011-21fgrep07:04:530
121650430irq/29-eth0_g0_16553-21/usr/sbin/munin10:04:490
121650430irq/29-eth0_g0_13-21kworker/0:111:51:420
121650430irq/29-eth0_g0_13-21kworker/0:111:19:340
121650430irq/29-eth0_g0_13-21kworker/0:110:14:470
121650430irq/29-eth0_g0_13-21kworker/0:109:44:030
121650430irq/29-eth0_g0_0-21swapper/012:34:530
121430ksoftirqd/1562399cyclictest10:49:471
121430ksoftirqd/1121750irq/30-eth0_g0_09:56:230
121430ksoftirqd/1121650irq/29-eth0_g0_10:54:270
5623994213cyclictest8870-21sed07:19:551
5623994211cyclictest21788-21munin-run12:39:331
121750420irq/30-eth0_g0_562399cyclictest12:10:271
121750420irq/30-eth0_g0_121ksoftirqd/111:50:371
121750420irq/30-eth0_g0_121ksoftirqd/109:50:341
121750420irq/30-eth0_g0_0-21swapper/112:26:231
121750420irq/30-eth0_g0_0-21swapper/112:26:231
121650420irq/29-eth0_g0_13-21kworker/0:112:12:350
121650420irq/29-eth0_g0_13-21kworker/0:112:04:380
121650420irq/29-eth0_g0_13-21kworker/0:111:04:400
121650420irq/29-eth0_g0_13-21kworker/0:109:24:310
121650420irq/29-eth0_g0_13-21kworker/0:109:13:160
121420ksoftirqd/1562399cyclictest11:09:521
121420ksoftirqd/1121750irq/30-eth0_g0_10:42:001
562399417cyclictest0-21swapper/107:44:471
562399417cyclictest0-21swapper/107:44:471
562399412cyclictest1048-21runrttasks09:00:311
5623994116cyclictest2665-21diskmemload10:19:451
5623994115cyclictest20149-21runrttasks08:07:151
5623994115cyclictest11853-21/usr/sbin/munin07:34:511
5623994115cyclictest11169-21sendmail_mailst07:29:541
5623994113cyclictest26056-21unixbench_singl08:29:541
5623994113cyclictest21671-21/usr/sbin/munin08:14:461
5623994113cyclictest10764-21unixbench_multi09:39:561
5623994112cyclictest32358-21runrttasks08:56:301
5623994111cyclictest30725-21ps08:49:521
562399411cyclictest15969-21taskset07:49:521
179712410sleep0121650irq/29-eth0_g0_12:22:590
121750410irq/30-eth0_g0_1875-21runrttasks10:09:590
121750410irq/30-eth0_g0_18672-21grep07:59:550
121650410irq/29-eth0_g0_562399cyclictest08:09:361
121650410irq/29-eth0_g0_2665-21diskmemload10:43:490
121650410irq/29-eth0_g0_13-21kworker/0:112:33:470
121650410irq/29-eth0_g0_13-21kworker/0:112:27:030
121650410irq/29-eth0_g0_13-21kworker/0:112:27:030
121650410irq/29-eth0_g0_13-21kworker/0:111:41:510
121650410irq/29-eth0_g0_13-21kworker/0:111:34:430
121650410irq/29-eth0_g0_13-21kworker/0:110:58:440
121650410irq/29-eth0_g0_13-21kworker/0:110:48:530
121650410irq/29-eth0_g0_13-21kworker/0:110:26:550
121650410irq/29-eth0_g0_13-21kworker/0:110:24:200
121650410irq/29-eth0_g0_13-21kworker/0:109:50:540
121650410irq/29-eth0_g0_13-21kworker/0:109:36:000
121650410irq/29-eth0_g0_13-21kworker/0:109:36:000
121750400irq/30-eth0_g0_28477-21unixbench_singl08:39:550
121750400irq/30-eth0_g0_1875-21runrttasks07:37:050
121650400irq/29-eth0_g0_16496-21chrt12:15:060
121650400irq/29-eth0_g0_13-21kworker/0:112:01:200
121650400irq/29-eth0_g0_13-21kworker/0:111:31:170
121650400irq/29-eth0_g0_13-21kworker/0:111:28:090
121650400irq/29-eth0_g0_13-21kworker/0:110:36:220
121650400irq/29-eth0_g0_13-21kworker/0:110:00:280
121650400irq/29-eth0_g0_13-21kworker/0:109:18:170
121650390irq/29-eth0_g0_1875-21runrttasks08:09:000
121750380irq/30-eth0_g0_15765-21chrt07:49:470
121750380irq/30-eth0_g0_0-21swapper/007:14:450
121750380irq/30-eth0_g0_0-21swapper/007:14:450
121380ksoftirqd/1121750irq/30-eth0_g0_11:10:500
121650370irq/29-eth0_g0_31881-21ntp_offset08:54:510
121650370irq/29-eth0_g0_1875-21runrttasks07:34:170
121650370irq/29-eth0_g0_14222-21latency_hist07:44:340
121750360irq/30-eth0_g0_22067-21ntp_states08:14:490
121650360irq/29-eth0_g0_2217-21grep09:04:550
121650360irq/29-eth0_g0_1875-21runrttasks08:38:350
121650360irq/29-eth0_g0_16819-21/usr/sbin/munin07:54:450
121360ksoftirqd/1121750irq/30-eth0_g0_08:44:450
121750350irq/30-eth0_g0_20559-21df_abs08:09:470
121650350irq/29-eth0_g0_9718-21missed_timers07:24:490
121650350irq/29-eth0_g0_1875-21runrttasks09:01:240
121650350irq/29-eth0_g0_1875-21runrttasks08:21:380
121650350irq/29-eth0_g0_14306-21/usr/sbin/munin07:44:440
121650350irq/29-eth0_g0_14306-21/usr/sbin/munin07:44:440
121750340irq/30-eth0_g0_1875-21runrttasks07:23:570
121650340irq/29-eth0_g0_6403-21unixbench_singl07:09:550
121650340irq/29-eth0_g0_31ksoftirqd/008:31:320
121650330irq/29-eth0_g0_0-21swapper/008:24:540
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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