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2026-06-21 - 18:45

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 Jun 21, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
968921440sleep1121750irq/30-eth0_g0_10:13:001
2319821250sleep0121650irq/29-eth0_g0_11:08:420
1062921140sleep0121750irq/30-eth0_g0_10:14:390
121660ksoftirqd/12934899cyclictest08:00:081
121650ksoftirqd/12934899cyclictest07:27:461
258172610sleep0121750irq/30-eth0_g0_09:04:130
90142580sleep1121750irq/30-eth0_g0_12:22:061
121560ksoftirqd/1121650irq/29-eth0_g0_11:54:081
82132510chrt121650irq/29-eth0_g0_10:04:590
121510ksoftirqd/1121750irq/30-eth0_g0_09:50:541
121500ksoftirqd/1121750irq/30-eth0_g0_09:16:161
121490ksoftirqd/1121750irq/30-eth0_g0_12:10:381
121490ksoftirqd/1121750irq/30-eth0_g0_09:56:511
284932480sleep0121750irq/30-eth0_g0_09:16:050
121480ksoftirqd/1121750irq/30-eth0_g0_10:56:121
121480ksoftirqd/1121750irq/30-eth0_g0_09:13:421
121470ksoftirqd/1121750irq/30-eth0_g0_11:39:030
121470ksoftirqd/1121750irq/30-eth0_g0_10:53:101
121750460irq/30-eth0_g0_14352-21chrt10:30:171
121750460irq/30-eth0_g0_1219-21kworker/1:212:24:041
310592450sleep0121650irq/29-eth0_g0_09:27:260
121450ksoftirqd/1121750irq/30-eth0_g0_12:31:121
121450ksoftirqd/1121750irq/30-eth0_g0_12:31:121
121450ksoftirqd/1121650irq/29-eth0_g0_11:45:271
121450ksoftirqd/1121650irq/29-eth0_g0_10:43:011
121450ksoftirqd/1121650irq/29-eth0_g0_10:15:271
121750440irq/30-eth0_g0_1219-21kworker/1:211:18:401
121750440irq/30-eth0_g0_1219-21kworker/1:211:18:401
121650440irq/29-eth0_g0_13-21kworker/0:111:17:480
121650440irq/29-eth0_g0_13-21kworker/0:111:17:480
267522430sleep1121750irq/30-eth0_g0_11:22:141
204372430sleep0121750irq/30-eth0_g0_10:54:570
121750430irq/30-eth0_g0_1219-21kworker/1:210:05:491
121650430irq/29-eth0_g0_31ksoftirqd/010:49:070
121650430irq/29-eth0_g0_13-21kworker/0:111:02:100
121650430irq/29-eth0_g0_121ksoftirqd/107:34:081
121650430irq/29-eth0_g0_121ksoftirqd/107:34:081
121430ksoftirqd/1121750irq/30-eth0_g0_08:24:060
60032420sleep0121650irq/29-eth0_g0_09:57:460
121750420irq/30-eth0_g0_1219-21kworker/1:212:05:441
121750420irq/30-eth0_g0_1219-21kworker/1:211:39:371
121750420irq/30-eth0_g0_1219-21kworker/1:211:34:501
121750420irq/30-eth0_g0_1219-21kworker/1:210:45:041
121750420irq/30-eth0_g0_1219-21kworker/1:210:26:121
121650420irq/29-eth0_g0_6183-21chrt09:58:561
121650420irq/29-eth0_g0_28877-21unixbench_singl07:04:110
2934899411cyclictest24606-21unixbench_singl08:59:141
121650410irq/29-eth0_g0_31ksoftirqd/010:22:450
121650410irq/29-eth0_g0_31ksoftirqd/009:34:110
121650410irq/29-eth0_g0_31ksoftirqd/007:24:110
121650410irq/29-eth0_g0_121ksoftirqd/110:47:190
121410ksoftirqd/1121750irq/30-eth0_g0_10:38:501
121410ksoftirqd/1121650irq/29-eth0_g0_09:27:261
299692400sleep029970-21sendmail_mailqu11:34:110
2934899402cyclictest21763-21memory08:49:061
2934899402cyclictest21763-21memory08:49:061
121750400irq/30-eth0_g0_121ksoftirqd/109:23:401
121650400irq/29-eth0_g0_9259-21/usr/sbin/munin12:24:100
121650400irq/29-eth0_g0_31ksoftirqd/012:34:070
121650400irq/29-eth0_g0_31ksoftirqd/007:34:080
121650400irq/29-eth0_g0_31ksoftirqd/007:34:080
121650400irq/29-eth0_g0_13-21kworker/0:111:44:560
121650400irq/29-eth0_g0_13-21kworker/0:109:58:540
121650400irq/29-eth0_g0_121ksoftirqd/110:10:490
121650400irq/29-eth0_g0_121ksoftirqd/109:49:090
121400ksoftirqd/1121650irq/29-eth0_g0_11:04:131
2934899392cyclictest11907-21taskset08:09:041
146152390sleep0121750irq/30-eth0_g0_10:33:210
121750390irq/30-eth0_g0_1219-21kworker/1:211:09:571
121750390irq/30-eth0_g0_1219-21kworker/1:211:09:571
121750390irq/30-eth0_g0_1219-21kworker/1:209:40:361
121750390irq/30-eth0_g0_121ksoftirqd/111:28:591
121650390irq/29-eth0_g0_2758-21iostat09:44:060
121650390irq/29-eth0_g0_13-21kworker/0:112:02:520
121650390irq/29-eth0_g0_13-21kworker/0:111:24:520
121650390irq/29-eth0_g0_13-21kworker/0:110:24:080
121390ksoftirqd/1121750irq/30-eth0_g0_12:22:260
121390ksoftirqd/1121750irq/30-eth0_g0_12:15:280
121390ksoftirqd/1121750irq/30-eth0_g0_12:12:160
121390ksoftirqd/1121750irq/30-eth0_g0_11:30:050
121390ksoftirqd/1121750irq/30-eth0_g0_11:09:420
121390ksoftirqd/1121750irq/30-eth0_g0_11:09:420
121390ksoftirqd/1121750irq/30-eth0_g0_10:38:140
121390ksoftirqd/1121750irq/30-eth0_g0_09:31:560
121390ksoftirqd/1121750irq/30-eth0_g0_09:22:220
121390ksoftirqd/1121750irq/30-eth0_g0_09:11:420
121390ksoftirqd/1121750irq/30-eth0_g0_08:57:440
121390ksoftirqd/1121750irq/30-eth0_g0_08:57:440
121390ksoftirqd/1121750irq/30-eth0_g0_08:52:000
121390ksoftirqd/1121750irq/30-eth0_g0_08:52:000
121390ksoftirqd/1121750irq/30-eth0_g0_08:41:120
121390ksoftirqd/1121750irq/30-eth0_g0_08:23:070
121390ksoftirqd/1121750irq/30-eth0_g0_08:08:570
121390ksoftirqd/1121750irq/30-eth0_g0_07:59:460
121390ksoftirqd/1121750irq/30-eth0_g0_07:52:330
121390ksoftirqd/1121750irq/30-eth0_g0_07:20:400
121390ksoftirqd/1121750irq/30-eth0_g0_07:18:020
121390ksoftirqd/1121750irq/30-eth0_g0_07:13:170
2934899381cyclictest568-21grep09:34:091
121750380irq/30-eth0_g0_1219-21kworker/1:211:26:431
121650380irq/29-eth0_g0_16983-21ntpq08:29:090
121650380irq/29-eth0_g0_0-21swapper/008:59:100
121380ksoftirqd/1121750irq/30-eth0_g0_12:06:020
121380ksoftirqd/1121750irq/30-eth0_g0_09:42:580
29348993722cyclictest1964-21runrttasks09:44:541
2934899371cyclictest20189-21cat08:43:511
2934899371cyclictest18500-21unixbench_singl08:34:141
2934899371cyclictest16729-21taskset08:29:031
2934899371cyclictest15825-21ps08:24:091
121750370irq/30-eth0_g0_28872-21unixbench_singl07:04:111
121750370irq/30-eth0_g0_1219-21kworker/1:212:02:031
121750370irq/30-eth0_g0_1219-21kworker/1:210:20:021
121750370irq/30-eth0_g0_1219-21kworker/1:209:33:171
121650370irq/29-eth0_g0_4886-21find07:39:100
121650370irq/29-eth0_g0_13-21kworker/0:110:42:050
121650370irq/29-eth0_g0_121ksoftirqd/112:34:011
121650370irq/29-eth0_g0_10866-21ntp_kernel_pll_12:29:070
121650370irq/29-eth0_g0_10866-21ntp_kernel_pll_12:29:070
121650370irq/29-eth0_g0_0-21swapper/011:57:330
121370ksoftirqd/1121650irq/29-eth0_g0_12:17:561
2934899362cyclictest2279-21seq07:29:081
2934899361cyclictest46462sleep107:39:061
2934899361cyclictest29826-21ntpdc07:09:091
2934899361cyclictest23292-21cat08:54:111
2934899361cyclictest23292-21cat08:54:111
2934899361cyclictest2109-21lldpd07:54:091
2934899361cyclictest20936-21grep08:44:131
2934899361cyclictest10705-21taskset08:04:051
121750360irq/30-eth0_g0_0-21swapper/011:49:020
2934899351cyclictest7261-21proc_pri07:49:111
2934899351cyclictest5644-21sed07:44:011
2934899351cyclictest31198-21runrttasks07:14:121
2934899351cyclictest20992-21df10:59:021
2934899351cyclictest1436-21chrt11:49:301
2934899351cyclictest13073-21seq08:14:041
121650350irq/29-eth0_g0_6763-21latency_hist07:48:510
121650350irq/29-eth0_g0_13-21kworker/0:111:19:070
121350ksoftirqd/1121650irq/29-eth0_g0_08:22:011
2934899341cyclictest252082sleep109:04:031
121650340irq/29-eth0_g0_8262-21irqstats07:54:040
121650340irq/29-eth0_g0_2934799cyclictest08:38:520
121650340irq/29-eth0_g0_1964-21runrttasks08:45:250
121650340irq/29-eth0_g0_1964-21runrttasks08:04:110
2934899331cyclictest32303-21taskset07:19:091
121650330irq/29-eth0_g0_0-21swapper/008:14:100
121650320irq/29-eth0_g0_1967-21runrttasks07:29:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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