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2026-03-16 - 20:31

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 Mon Mar 16, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121690ksoftirqd/1121750irq/30-eth0_g0_10:29:221
121640ksoftirqd/1121750irq/30-eth0_g0_10:55:040
134632550sleep1121650irq/29-eth0_g0_10:53:041
121520ksoftirqd/1121750irq/30-eth0_g0_11:50:311
121520ksoftirqd/1121750irq/30-eth0_g0_10:00:221
121510ksoftirqd/1121750irq/30-eth0_g0_09:13:121
3452500chrt121650irq/29-eth0_g0_12:10:161
121500ksoftirqd/1121750irq/30-eth0_g0_10:23:231
121500ksoftirqd/1121750irq/30-eth0_g0_10:23:231
294322490sleep0121750irq/30-eth0_g0_11:58:380
121490ksoftirqd/1121750irq/30-eth0_g0_09:50:381
121490ksoftirqd/1121750irq/30-eth0_g0_09:28:491
205962470sleep0121750irq/30-eth0_g0_09:09:570
121470ksoftirqd/1121650irq/29-eth0_g0_09:35:040
121460ksoftirqd/1121750irq/30-eth0_g0_11:47:361
121460ksoftirqd/1121750irq/30-eth0_g0_10:17:541
121450ksoftirqd/1121650irq/29-eth0_g0_12:19:541
121450ksoftirqd/1121650irq/29-eth0_g0_08:33:441
121750440irq/30-eth0_g0_470-21kworker/1:112:38:381
121440ksoftirqd/1121750irq/30-eth0_g0_12:15:461
121440ksoftirqd/1121650irq/29-eth0_g0_10:05:510
121440ksoftirqd/1121650irq/29-eth0_g0_09:07:201
121440ksoftirqd/1121650irq/29-eth0_g0_08:19:191
121440ksoftirqd/1121650irq/29-eth0_g0_07:49:461
121750430irq/30-eth0_g0_121ksoftirqd/111:36:381
121650430irq/29-eth0_g0_13-21kworker/0:110:59:590
121430ksoftirqd/1121750irq/30-eth0_g0_11:01:491
121750420irq/30-eth0_g0_470-21kworker/1:111:08:281
121750420irq/30-eth0_g0_470-21kworker/1:109:48:041
121750420irq/30-eth0_g0_121ksoftirqd/111:25:031
121650420irq/29-eth0_g0_13-21kworker/0:112:12:060
121650420irq/29-eth0_g0_13-21kworker/0:109:32:480
121650420irq/29-eth0_g0_0-21swapper/012:20:070
121420ksoftirqd/1121750irq/30-eth0_g0_11:34:060
267112410sleep0121650irq/29-eth0_g0_11:45:240
121750410irq/30-eth0_g0_470-21kworker/1:110:38:081
121750410irq/30-eth0_g0_470-21kworker/1:109:23:281
121750410irq/30-eth0_g0_470-21kworker/1:109:15:421
121650410irq/29-eth0_g0_31ksoftirqd/011:28:160
121650410irq/29-eth0_g0_22667-21/usr/sbin/munin07:05:020
121650410irq/29-eth0_g0_13-21kworker/0:111:19:470
121410ksoftirqd/1121750irq/30-eth0_g0_09:55:200
121410ksoftirqd/1121650irq/29-eth0_g0_11:59:211
121410ksoftirqd/1121650irq/29-eth0_g0_09:00:011
2342499401cyclictest23441-21latency_hist11:34:451
121750400irq/30-eth0_g0_121ksoftirqd/112:30:021
121650400irq/29-eth0_g0_31ksoftirqd/011:53:350
121650400irq/29-eth0_g0_29629-21grep09:45:060
121650400irq/29-eth0_g0_2029-21runrttasks07:26:250
121650400irq/29-eth0_g0_2029-21runrttasks07:26:250
121650400irq/29-eth0_g0_121ksoftirqd/112:35:090
121400ksoftirqd/1121750irq/30-eth0_g0_11:40:290
121400ksoftirqd/1121750irq/30-eth0_g0_11:14:410
121400ksoftirqd/1121750irq/30-eth0_g0_10:47:380
121400ksoftirqd/1121650irq/29-eth0_g0_10:15:520
2342499397cyclictest188322sleep111:14:561
23424993934cyclictest1445-21/usr/sbin/munin10:05:041
2342499391cyclictest30232-21taskset07:35:071
2342499391cyclictest114082sleep110:44:561
121750390irq/30-eth0_g0_470-21kworker/1:112:29:261
121750390irq/30-eth0_g0_470-21kworker/1:111:40:321
121750390irq/30-eth0_g0_22411-21sed07:04:571
121650390irq/29-eth0_g0_9880-21proc_pri08:25:040
121650390irq/29-eth0_g0_13-21kworker/0:111:16:180
121650390irq/29-eth0_g0_13-21kworker/0:110:21:520
121650390irq/29-eth0_g0_13-21kworker/0:110:21:520
121650390irq/29-eth0_g0_13-21kworker/0:109:40:420
121650390irq/29-eth0_g0_0-21swapper/007:35:020
121390ksoftirqd/1121750irq/30-eth0_g0_12:32:020
121390ksoftirqd/1121750irq/30-eth0_g0_12:16:090
121390ksoftirqd/1121750irq/30-eth0_g0_11:36:350
121390ksoftirqd/1121750irq/30-eth0_g0_10:43:080
121390ksoftirqd/1121750irq/30-eth0_g0_10:43:080
121390ksoftirqd/1121750irq/30-eth0_g0_10:35:380
121390ksoftirqd/1121750irq/30-eth0_g0_10:32:310
121390ksoftirqd/1121750irq/30-eth0_g0_10:28:090
121390ksoftirqd/1121750irq/30-eth0_g0_10:10:080
121390ksoftirqd/1121750irq/30-eth0_g0_10:02:460
121390ksoftirqd/1121750irq/30-eth0_g0_09:22:440
121390ksoftirqd/1121750irq/30-eth0_g0_09:18:220
121390ksoftirqd/1121750irq/30-eth0_g0_08:55:470
121390ksoftirqd/1121750irq/30-eth0_g0_08:55:470
121390ksoftirqd/1121750irq/30-eth0_g0_08:52:570
121390ksoftirqd/1121750irq/30-eth0_g0_08:35:390
121390ksoftirqd/1121750irq/30-eth0_g0_08:31:520
121390ksoftirqd/1121750irq/30-eth0_g0_08:09:440
121390ksoftirqd/1121750irq/30-eth0_g0_07:47:060
2342499381cyclictest48182sleep108:04:591
2342499381cyclictest4018-21grep08:00:071
2342499381cyclictest198822sleep111:19:551
121750380irq/30-eth0_g0_470-21kworker/1:111:11:361
121750380irq/30-eth0_g0_470-21kworker/1:110:32:231
121750380irq/30-eth0_g0_470-21kworker/1:109:57:071
121750380irq/30-eth0_g0_470-21kworker/1:109:31:411
121750380irq/30-eth0_g0_10449-21seq10:40:031
121750380irq/30-eth0_g0_10449-21seq10:40:031
121650380irq/29-eth0_g0_31368-21gzip07:40:060
121650380irq/29-eth0_g0_31ksoftirqd/009:25:050
121650380irq/29-eth0_g0_13-21kworker/0:112:06:500
121650380irq/29-eth0_g0_13-21kworker/0:111:05:370
121650380irq/29-eth0_g0_13-21kworker/0:109:51:010
121380ksoftirqd/1121750irq/30-eth0_g0_12:28:460
121380ksoftirqd/1121750irq/30-eth0_g0_12:01:430
121380ksoftirqd/1121750irq/30-eth0_g0_09:06:070
2342499372cyclictest300-21unixbench_singl07:45:071
2342499372cyclictest29912-21memory12:00:001
2342499371cyclictest8203-21cpu08:19:561
2342499371cyclictest15602-21df08:49:571
2342499371cyclictest13484-21grep08:40:021
121750370irq/30-eth0_g0_470-21kworker/1:109:34:461
121750370irq/30-eth0_g0_121ksoftirqd/110:58:191
121750370irq/30-eth0_g0_0-21swapper/110:10:411
121750370irq/30-eth0_g0_0-21swapper/109:41:251
121750370irq/30-eth0_g0_0-21swapper/107:57:231
121650370irq/29-eth0_g0_24142-21grep07:10:070
121650370irq/29-eth0_g0_2029-21runrttasks10:50:000
121370ksoftirqd/1121650irq/29-eth0_g0_07:10:071
2342499362cyclictest309942sleep107:39:581
2342499361cyclictest28525-21sed07:29:561
2342499361cyclictest27839-21grep07:25:061
2342499361cyclictest27839-21grep07:25:061
121650360irq/29-eth0_g0_28549-21runrttasks07:29:560
121650360irq/29-eth0_g0_2623-21zcat07:55:040
121650360irq/29-eth0_g0_17972-21/usr/sbin/munin08:59:550
2342499351cyclictest25195-21ps07:15:031
121750350irq/30-eth0_g0_0-21swapper/112:06:551
121650350irq/29-eth0_g0_3588-21cat08:00:000
121650350irq/29-eth0_g0_25289-21sendmail_mailtr07:15:050
121650350irq/29-eth0_g0_2029-21runrttasks08:41:160
121650350irq/29-eth0_g0_2029-21runrttasks08:10:570
121650350irq/29-eth0_g0_2029-21runrttasks08:10:570
121650350irq/29-eth0_g0_1510-21unixbench_multi07:50:060
2342499342cyclictest170422sleep108:54:591
2342499342cyclictest170422sleep108:54:591
2342499341cyclictest63302sleep108:10:081
2342499341cyclictest63302sleep108:10:081
121650340irq/29-eth0_g0_8587-21/usr/sbin/munin08:20:020
121650340irq/29-eth0_g0_7296-21missed_timers08:14:590
2342499332cyclictest26424-21proc_pri07:20:041
121750330irq/30-eth0_g0_9656-21irqstats08:25:001
121650330irq/29-eth0_g0_14775-21ps08:45:040
2342499325cyclictest12318-21proc_pri08:35:021
2342499321cyclictest14841-21chrt08:45:041
121650320irq/29-eth0_g0_26418-21runrttasks07:20:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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