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2026-06-05 - 23:51

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 Fri Jun 05, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
627921020sleep1121650irq/29-eth0_g0_12:06:121
923321010sleep0121650irq/29-eth0_g0_10:05:410
283022870sleep1121650irq/29-eth0_g0_09:12:191
121860ksoftirqd/1121750irq/30-eth0_g0_09:53:571
121860ksoftirqd/1121650irq/29-eth0_g0_11:54:470
121820ksoftirqd/1121750irq/30-eth0_g0_11:33:381
253382710sleep0121650irq/29-eth0_g0_11:12:460
121710ksoftirqd/1121750irq/30-eth0_g0_12:13:361
154192700sleep0121750irq/30-eth0_g0_10:31:230
212692680chrt121750irq/30-eth0_g0_10:54:501
238962550sleep1121650irq/29-eth0_g0_11:05:141
238962550sleep1121650irq/29-eth0_g0_11:05:141
22822540sleep1121750irq/30-eth0_g0_07:24:511
121750510irq/30-eth0_g0_1219-21kworker/1:211:34:441
121510ksoftirqd/1121750irq/30-eth0_g0_11:15:131
121490ksoftirqd/1121650irq/29-eth0_g0_09:27:190
121750470irq/30-eth0_g0_22279-21ntpdc10:59:450
121470ksoftirqd/1121750irq/30-eth0_g0_12:31:271
121470ksoftirqd/1121650irq/29-eth0_g0_11:02:541
121750460irq/30-eth0_g0_13529-21runrttasks12:35:041
121460ksoftirqd/1121650irq/29-eth0_g0_11:41:351
326282450sleep0121750irq/30-eth0_g0_11:41:560
121650450irq/29-eth0_g0_1964-21runrttasks07:05:301
121750440irq/30-eth0_g0_1219-21kworker/1:210:53:431
121750440irq/30-eth0_g0_1219-21kworker/1:209:43:301
121750440irq/30-eth0_g0_121ksoftirqd/109:35:071
121650440irq/29-eth0_g0_11572-21df_inode08:04:410
129592430sleep1121650irq/29-eth0_g0_10:21:151
121750430irq/30-eth0_g0_1219-21kworker/1:211:20:071
121650430irq/29-eth0_g0_49392sleep011:59:550
121650430irq/29-eth0_g0_121ksoftirqd/111:16:380
121430ksoftirqd/1121750irq/30-eth0_g0_11:48:471
121430ksoftirqd/1121750irq/30-eth0_g0_09:30:131
121430ksoftirqd/1121650irq/29-eth0_g0_10:29:431
121430ksoftirqd/1121650irq/29-eth0_g0_10:12:590
121430ksoftirqd/1121650irq/29-eth0_g0_10:12:590
119952430sleep0121650irq/29-eth0_g0_10:19:180
30270994227cyclictest1964-21runrttasks12:14:471
3027099422cyclictest19445-21awk08:34:511
3027099422cyclictest19445-21awk08:34:511
125802420sleep0121750irq/30-eth0_g0_12:33:170
121750420irq/30-eth0_g0_1219-21kworker/1:209:54:461
121750420irq/30-eth0_g0_1219-21kworker/1:209:45:361
121650420irq/29-eth0_g0_31ksoftirqd/011:48:250
121650420irq/29-eth0_g0_31ksoftirqd/011:27:090
121650420irq/29-eth0_g0_31ksoftirqd/009:47:570
121650420irq/29-eth0_g0_121ksoftirqd/112:15:570
121750410irq/30-eth0_g0_1219-21kworker/1:209:19:091
121650410irq/29-eth0_g0_31ksoftirqd/009:14:420
121650410irq/29-eth0_g0_19744-21memory10:49:430
121650410irq/29-eth0_g0_0-21swapper/009:59:290
121750400irq/30-eth0_g0_1219-21kworker/1:212:24:381
121750400irq/30-eth0_g0_1219-21kworker/1:211:13:461
121750400irq/30-eth0_g0_121ksoftirqd/109:24:291
121650400irq/29-eth0_g0_3026999cyclictest10:19:420
121650400irq/29-eth0_g0_31ksoftirqd/010:54:440
121650400irq/29-eth0_g0_1964-21runrttasks12:36:260
121650400irq/29-eth0_g0_13-21kworker/0:112:10:370
121650400irq/29-eth0_g0_13-21kworker/0:112:09:140
121650400irq/29-eth0_g0_13-21kworker/0:111:37:020
121650400irq/29-eth0_g0_13-21kworker/0:110:49:290
121650400irq/29-eth0_g0_13-21kworker/0:110:26:000
121650400irq/29-eth0_g0_13-21kworker/0:109:36:390
121650400irq/29-eth0_g0_13-21kworker/0:109:11:140
121650400irq/29-eth0_g0_0-21swapper/007:06:440
121400ksoftirqd/1121750irq/30-eth0_g0_10:34:490
121400ksoftirqd/1121750irq/30-eth0_g0_09:40:520
3027099391cyclictest265862sleep109:04:471
3027099391cyclictest15038-21taskset08:19:291
3027099391cyclictest128742sleep108:09:411
121750390irq/30-eth0_g0_21843-21tail08:44:501
121750390irq/30-eth0_g0_1219-21kworker/1:212:00:011
121750390irq/30-eth0_g0_1219-21kworker/1:210:26:031
121750390irq/30-eth0_g0_121ksoftirqd/109:26:131
121650390irq/29-eth0_g0_13-21kworker/0:109:49:380
121650390irq/29-eth0_g0_13-21kworker/0:109:31:500
121650390irq/29-eth0_g0_13-21kworker/0:109:20:330
121390ksoftirqd/1121750irq/30-eth0_g0_12:26:240
121390ksoftirqd/1121750irq/30-eth0_g0_12:20:500
121390ksoftirqd/1121750irq/30-eth0_g0_11:07:300
121390ksoftirqd/1121750irq/30-eth0_g0_11:07:300
121390ksoftirqd/1121750irq/30-eth0_g0_10:41:470
121390ksoftirqd/1121750irq/30-eth0_g0_10:00:320
121390ksoftirqd/1121750irq/30-eth0_g0_08:52:300
121390ksoftirqd/1121750irq/30-eth0_g0_07:15:560
121390ksoftirqd/1121750irq/30-eth0_g0_07:15:560
121390ksoftirqd/1121650irq/29-eth0_g0_11:53:381
121390ksoftirqd/1121650irq/29-eth0_g0_10:13:201
121390ksoftirqd/1121650irq/29-eth0_g0_10:13:201
121390ksoftirqd/1121650irq/29-eth0_g0_10:06:451
121390ksoftirqd/1121650irq/29-eth0_g0_08:54:051
121390ksoftirqd/1121650irq/29-eth0_g0_08:04:001
121390ksoftirqd/1121650irq/29-eth0_g0_08:04:001
3027099381cyclictest186952sleep110:44:461
121750380irq/30-eth0_g0_121ksoftirqd/111:58:141
121750380irq/30-eth0_g0_121ksoftirqd/110:40:281
121750380irq/30-eth0_g0_121ksoftirqd/110:38:111
121750380irq/30-eth0_g0_0-21swapper/112:21:051
121650380irq/29-eth0_g0_31ksoftirqd/011:21:530
121650380irq/29-eth0_g0_13-21kworker/0:111:51:220
121380ksoftirqd/1121750irq/30-eth0_g0_09:59:421
121380ksoftirqd/1121650irq/29-eth0_g0_10:15:301
3027099371cyclictest92082sleep107:54:421
3027099371cyclictest8379-21grep07:49:511
3027099371cyclictest27264-21diskmemload11:24:421
3027099371cyclictest20158-21/usr/sbin/munin08:39:411
3027099371cyclictest0-21swapper/107:14:011
121650370irq/29-eth0_g0_21801-21sort08:44:490
121650370irq/29-eth0_g0_1964-21runrttasks08:35:060
121650370irq/29-eth0_g0_1964-21runrttasks08:35:060
121650370irq/29-eth0_g0_13108-21chrt08:09:470
121650370irq/29-eth0_g0_13-21kworker/0:111:30:120
3027099362cyclictest5594-21wc07:39:441
3027099361cyclictest6839-21taskset07:44:451
3027099361cyclictest3217-21/usr/sbin/munin07:29:441
3027099361cyclictest16561-21cat08:24:431
3027099361cyclictest115462sleep108:04:411
3027099361cyclictest0-21swapper/108:29:481
121650360irq/29-eth0_g0_6460-21latency_hist07:44:290
121650360irq/29-eth0_g0_4796-21vmstat07:34:530
121650360irq/29-eth0_g0_30743-21ntpdc07:09:450
121650360irq/29-eth0_g0_3027099cyclictest08:59:281
121650360irq/29-eth0_g0_24373-21grep08:54:480
121650360irq/29-eth0_g0_2327-21unixbench_singl07:24:520
121650360irq/29-eth0_g0_1964-21runrttasks09:05:020
121650360irq/29-eth0_g0_1964-21runrttasks08:44:180
121650360irq/29-eth0_g0_15795-21unixbench_singl08:19:510
121650360irq/29-eth0_g0_14249-21awk08:14:450
121650360irq/29-eth0_g0_10471-21latency07:59:420
121650360irq/29-eth0_g0_10471-21latency07:59:420
121360ksoftirqd/1121750irq/30-eth0_g0_07:52:440
121360ksoftirqd/1121750irq/30-eth0_g0_07:21:440
3027099352cyclictest4460-21/usr/sbin/munin07:34:471
3027099351cyclictest31656-21df_abs07:14:401
3027099351cyclictest31656-21df_abs07:14:401
121650350irq/29-eth0_g0_3021-21if_err_eth007:29:410
121650350irq/29-eth0_g0_1964-21runrttasks09:03:250
121650350irq/29-eth0_g0_17805-21cat08:29:420
121350ksoftirqd/1121650irq/29-eth0_g0_08:24:231
121650340irq/29-eth0_g0_6844-21missed_timers07:44:450
121650340irq/29-eth0_g0_0-21swapper/007:54:500
3027099331cyclictest25568-21unixbench_singl08:59:481
121650330irq/29-eth0_g0_1964-21runrttasks07:21:551
121650330irq/29-eth0_g0_16776-21proc_pri08:24:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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