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2026-09-03 - 07:52

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 Thu Sep 03, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2874421660sleep1121650irq/29-eth0_g0_21:55:461
2372699153145cyclictest0-21swapper/121:13:371
1211310ksoftirqd/1121750irq/30-eth0_g0_19:26:331
121860ksoftirqd/1121650irq/29-eth0_g0_21:46:150
121790ksoftirqd/1121750irq/30-eth0_g0_23:11:100
121750ksoftirqd/1121650irq/29-eth0_g0_20:55:551
121690ksoftirqd/1121750irq/30-eth0_g0_00:10:391
253262640sleep1121650irq/29-eth0_g0_23:53:381
193842590sleep0121750irq/30-eth0_g0_23:30:410
311302580sleep1121650irq/29-eth0_g0_22:05:111
121580ksoftirqd/1121650irq/29-eth0_g0_00:30:450
121570ksoftirqd/1121750irq/30-eth0_g0_22:39:281
121570ksoftirqd/1121750irq/30-eth0_g0_22:39:281
121560ksoftirqd/1121750irq/30-eth0_g0_21:01:091
121560ksoftirqd/1121750irq/30-eth0_g0_19:51:161
314412540sleep0121650irq/29-eth0_g0_00:18:400
121540ksoftirqd/1121750irq/30-eth0_g0_23:57:161
121540ksoftirqd/1121750irq/30-eth0_g0_22:24:451
121540ksoftirqd/1121750irq/30-eth0_g0_19:50:151
121540ksoftirqd/1121750irq/30-eth0_g0_00:02:101
121540ksoftirqd/1121750irq/30-eth0_g0_00:02:101
229742530sleep0121750irq/30-eth0_g0_19:01:110
121750530irq/30-eth0_g0_2372699cyclictest21:40:571
121530ksoftirqd/1121650irq/29-eth0_g0_00:01:230
121530ksoftirqd/1121650irq/29-eth0_g0_00:01:230
121520ksoftirqd/1121750irq/30-eth0_g0_23:41:530
121520ksoftirqd/1121750irq/30-eth0_g0_00:16:041
121510ksoftirqd/1121750irq/30-eth0_g0_23:54:480
121510ksoftirqd/1121750irq/30-eth0_g0_00:22:421
121510ksoftirqd/1121650irq/29-eth0_g0_23:01:081
93732500sleep1121750irq/30-eth0_g0_22:47:521
157872500sleep1121750irq/30-eth0_g0_23:15:541
121500ksoftirqd/1121750irq/30-eth0_g0_23:50:501
121500ksoftirqd/1121750irq/30-eth0_g0_23:27:171
121500ksoftirqd/1121750irq/30-eth0_g0_23:17:081
121500ksoftirqd/1121750irq/30-eth0_g0_21:32:081
121500ksoftirqd/1121650irq/29-eth0_g0_23:57:510
121490ksoftirqd/1121750irq/30-eth0_g0_23:35:461
121490ksoftirqd/1121750irq/30-eth0_g0_22:58:380
121490ksoftirqd/1121750irq/30-eth0_g0_22:41:051
121490ksoftirqd/1121750irq/30-eth0_g0_22:32:101
121490ksoftirqd/1121750irq/30-eth0_g0_22:19:101
121490ksoftirqd/1121750irq/30-eth0_g0_21:56:321
121490ksoftirqd/1121750irq/30-eth0_g0_20:46:120
121490ksoftirqd/1121650irq/29-eth0_g0_23:36:091
121490ksoftirqd/1121650irq/29-eth0_g0_22:55:541
121480ksoftirqd/1121750irq/30-eth0_g0_22:30:500
121480ksoftirqd/1121750irq/30-eth0_g0_22:29:291
121480ksoftirqd/1121750irq/30-eth0_g0_20:46:501
121480ksoftirqd/1121650irq/29-eth0_g0_22:57:531
121750470irq/30-eth0_g0_2372699cyclictest21:48:121
121650470irq/29-eth0_g0_32518-21latency_hist22:11:350
121650470irq/29-eth0_g0_2372699cyclictest21:36:061
121470ksoftirqd/1121750irq/30-eth0_g0_19:44:451
81222460sleep0121750irq/30-eth0_g0_22:42:340
121750460irq/30-eth0_g0_2372699cyclictest23:43:591
121750460irq/30-eth0_g0_2372699cyclictest00:14:461
121450ksoftirqd/1121750irq/30-eth0_g0_23:07:381
121450ksoftirqd/1121750irq/30-eth0_g0_20:38:181
121450ksoftirqd/1121750irq/30-eth0_g0_19:36:151
121450ksoftirqd/1121750irq/30-eth0_g0_00:31:081
121450ksoftirqd/1121650irq/29-eth0_g0_22:00:020
121750440irq/30-eth0_g0_2372699cyclictest23:22:261
121750440irq/30-eth0_g0_2372699cyclictest23:22:261
121440ksoftirqd/1121750irq/30-eth0_g0_21:00:151
121440ksoftirqd/1121750irq/30-eth0_g0_21:00:151
121440ksoftirqd/1121750irq/30-eth0_g0_20:23:541
121440ksoftirqd/1121750irq/30-eth0_g0_20:06:081
121440ksoftirqd/1121650irq/29-eth0_g0_22:14:061
121440ksoftirqd/1121650irq/29-eth0_g0_21:08:401
121650430irq/29-eth0_g0_0-21swapper/020:16:150
121430ksoftirqd/1121750irq/30-eth0_g0_19:16:091
121430ksoftirqd/1121750irq/30-eth0_g0_00:28:571
121430ksoftirqd/1121750irq/30-eth0_g0_00:22:240
59152420sleep0121750irq/30-eth0_g0_22:35:270
166902420chrt121750irq/30-eth0_g0_23:17:540
121420ksoftirqd/1121650irq/29-eth0_g0_22:13:250
121420ksoftirqd/1121650irq/29-eth0_g0_21:06:160
121420ksoftirqd/1121650irq/29-eth0_g0_19:06:091
121650410irq/29-eth0_g0_31ksoftirqd/023:05:220
121650410irq/29-eth0_g0_2372599cyclictest22:04:560
121650410irq/29-eth0_g0_121ksoftirqd/100:31:000
121650410irq/29-eth0_g0_0-21swapper/020:11:050
121410ksoftirqd/1121750irq/30-eth0_g0_23:34:260
121410ksoftirqd/1121750irq/30-eth0_g0_23:06:410
23726994028cyclictest8884-21/usr/sbin/munin20:16:111
23726994027cyclictest25022-21/usr/sbin/munin19:11:041
121650400irq/29-eth0_g0_13-21kworker/0:100:06:450
121650390irq/29-eth0_g0_31ksoftirqd/022:53:280
121650390irq/29-eth0_g0_24208-21df_abs21:36:060
121650390irq/29-eth0_g0_13-21kworker/0:121:32:350
121390ksoftirqd/1121750irq/30-eth0_g0_23:25:430
121390ksoftirqd/1121750irq/30-eth0_g0_23:25:430
2372699382cyclictest30106-21irqstats19:31:081
2372699381cyclictest31714-21seq22:06:171
2372699381cyclictest31714-21seq22:06:171
2372699381cyclictest27739-21missed_timers19:21:091
121650380irq/29-eth0_g0_2372599cyclictest00:11:170
121650380irq/29-eth0_g0_1964-21runrttasks19:39:260
121650380irq/29-eth0_g0_13-21kworker/0:123:46:060
121650380irq/29-eth0_g0_13-21kworker/0:122:06:290
121380ksoftirqd/1121750irq/30-eth0_g0_21:28:530
2372699372cyclictest5238-21ps20:01:171
2372699371cyclictest4710-21taskset20:00:541
2372699371cyclictest2109-21lldpd20:44:351
121650370irq/29-eth0_g0_6428-21awk22:36:120
121650370irq/29-eth0_g0_6428-21awk22:36:120
121650370irq/29-eth0_g0_3480-21runrttasks22:25:380
121650370irq/29-eth0_g0_30246-21/usr/sbin/munin19:31:100
121650370irq/29-eth0_g0_23324-21runrttasks19:01:221
121650370irq/29-eth0_g0_1964-21runrttasks19:58:050
121650370irq/29-eth0_g0_1964-21runrttasks19:45:530
121650370irq/29-eth0_g0_13-21kworker/0:122:19:140
121650370irq/29-eth0_g0_13-21kworker/0:121:51:100
2372699362cyclictest10948-21df20:26:051
2372699361cyclictest12187-21df_abs20:31:061
121650360irq/29-eth0_g0_1964-21runrttasks20:24:520
121650360irq/29-eth0_g0_13-21kworker/0:122:49:450
121650360irq/29-eth0_g0_13-21kworker/0:121:45:300
121650360irq/29-eth0_g0_12407-21chrt20:31:090
121650350irq/29-eth0_g0_6643-21unixbench_multi20:06:130
121650350irq/29-eth0_g0_24992-21sort19:10:540
121650350irq/29-eth0_g0_1964-21runrttasks23:38:440
121650350irq/29-eth0_g0_1964-21runrttasks19:55:240
121650350irq/29-eth0_g0_0-21swapper/020:01:160
2372699341cyclictest0-21swapper/120:11:081
121650340irq/29-eth0_g0_29043-21ntp_states19:26:110
121650340irq/29-eth0_g0_28080-21unixbench_multi19:21:150
121650340irq/29-eth0_g0_26485-21memory19:16:090
121650340irq/29-eth0_g0_19819-21/usr/sbin/munin21:01:100
121650340irq/29-eth0_g0_15175-21grep20:41:140
121650340irq/29-eth0_g0_13706-21ntp_kernel_err20:36:100
121650340irq/29-eth0_g0_11538-21unixbench_multi20:26:140
121650340irq/29-eth0_g0_0-21swapper/019:11:120
121650330irq/29-eth0_g0_18369-21df_inode20:56:060
121650330irq/29-eth0_g0_18369-21df_inode20:56:060
121650330irq/29-eth0_g0_0-21swapper/020:51:040
121650330irq/29-eth0_g0_0-21swapper/019:46:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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