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2026-03-30 - 01:54

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 30, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1985021620sleep1121650irq/29-eth0_g0_23:26:001
1985021620sleep1121650irq/29-eth0_g0_23:26:001
2037021310sleep0121650irq/29-eth0_g0_21:16:050
2728521260sleep1121650irq/29-eth0_g0_23:56:491
1940521120sleep1121650irq/29-eth0_g0_21:14:071
121970ksoftirqd/1121750irq/30-eth0_g0_00:08:411
121790ksoftirqd/1121750irq/30-eth0_g0_22:43:570
121790ksoftirqd/1121750irq/30-eth0_g0_22:43:570
255122770sleep0121750irq/30-eth0_g0_21:38:440
99972710sleep0121750irq/30-eth0_g0_22:45:350
8452670sleep0121650irq/29-eth0_g0_00:20:240
121640ksoftirqd/1121750irq/30-eth0_g0_21:58:041
121620ksoftirqd/1121750irq/30-eth0_g0_00:21:031
121610ksoftirqd/1121750irq/30-eth0_g0_21:32:560
121570ksoftirqd/1121750irq/30-eth0_g0_21:53:510
121570ksoftirqd/1121750irq/30-eth0_g0_20:50:041
121560ksoftirqd/1121750irq/30-eth0_g0_19:07:251
121560ksoftirqd/1121650irq/29-eth0_g0_21:51:121
121550ksoftirqd/1121750irq/30-eth0_g0_23:00:461
121540ksoftirqd/1121750irq/30-eth0_g0_22:59:471
121520ksoftirqd/1121750irq/30-eth0_g0_23:50:511
121520ksoftirqd/1121750irq/30-eth0_g0_21:08:500
121510ksoftirqd/1121750irq/30-eth0_g0_20:15:061
121510ksoftirqd/1121650irq/29-eth0_g0_22:30:061
121500ksoftirqd/1121650irq/29-eth0_g0_22:29:290
121750490irq/30-eth0_g0_2119799cyclictest22:07:181
121750480irq/30-eth0_g0_2119799cyclictest21:30:461
121480ksoftirqd/1121750irq/30-eth0_g0_23:20:091
121480ksoftirqd/1121650irq/29-eth0_g0_21:45:041
121650470irq/29-eth0_g0_1875-21runrttasks19:05:310
121470ksoftirqd/1121750irq/30-eth0_g0_23:35:331
121470ksoftirqd/1121750irq/30-eth0_g0_21:19:261
121470ksoftirqd/1121750irq/30-eth0_g0_00:39:111
2119799468cyclictest0-21swapper/120:25:361
121750460irq/30-eth0_g0_2119799cyclictest22:01:101
121750460irq/30-eth0_g0_2119799cyclictest00:16:361
121750460irq/30-eth0_g0_2119799cyclictest00:16:361
121460ksoftirqd/1121750irq/30-eth0_g0_23:11:411
121750450irq/30-eth0_g0_2119799cyclictest22:50:051
121750450irq/30-eth0_g0_2119799cyclictest22:46:101
121750450irq/30-eth0_g0_2119799cyclictest22:25:491
121450ksoftirqd/1121750irq/30-eth0_g0_21:39:001
121450ksoftirqd/1121750irq/30-eth0_g0_21:10:060
121450ksoftirqd/1121650irq/29-eth0_g0_23:15:031
21197994430cyclictest32298-21latency_hist19:54:491
21197994427cyclictest14771-21unixbench_multi23:05:091
2119799442cyclictest6601-21sendmail_mailst20:20:081
2119799441cyclictest212192sleep123:32:341
121750440irq/30-eth0_g0_2119799cyclictest22:11:031
121750440irq/30-eth0_g0_2119799cyclictest00:32:151
121750440irq/30-eth0_g0_2119799cyclictest00:28:161
121650440irq/29-eth0_g0_29417-21/usr/sbin/munin00:05:090
121440ksoftirqd/1121750irq/30-eth0_g0_22:36:241
2119799439cyclictest23166-21grep19:15:101
2119799431cyclictest565-21unixbench_singl19:55:081
2119799431cyclictest25653-21head19:25:111
121750430irq/30-eth0_g0_2119799cyclictest23:39:581
121430ksoftirqd/1121650irq/29-eth0_g0_00:10:001
2119799422cyclictest1875-21runrttasks20:29:571
21197994211cyclictest28013-21/usr/sbin/munin00:00:031
2119799421cyclictest28907-21latency19:40:041
121750420irq/30-eth0_g0_2119799cyclictest21:40:181
121750420irq/30-eth0_g0_2119799cyclictest21:28:051
121750420irq/30-eth0_g0_1875-21runrttasks23:44:300
121650420irq/29-eth0_g0_2119799cyclictest22:39:551
121650420irq/29-eth0_g0_2119799cyclictest22:39:551
121420ksoftirqd/12119799cyclictest19:20:071
121420ksoftirqd/1121750irq/30-eth0_g0_23:49:141
121420ksoftirqd/1121750irq/30-eth0_g0_22:16:571
121420ksoftirqd/1121750irq/30-eth0_g0_21:20:021
121420ksoftirqd/1121750irq/30-eth0_g0_20:05:031
2119799419cyclictest121750irq/30-eth0_g0_20:45:081
2119799419cyclictest121750irq/30-eth0_g0_20:35:051
21197994136cyclictest29944-21df_abs19:45:011
21197994126cyclictest15167-21processes20:55:061
21197994126cyclictest15167-21processes20:55:061
21197994112cyclictest17269-21/usr/sbin/munin21:05:011
2119799411cyclictest3990-21ntpq20:10:061
2119799411cyclictest1219-21kworker/1:222:21:431
121650410irq/29-eth0_g0_1875-21runrttasks23:25:550
121650410irq/29-eth0_g0_1875-21runrttasks23:25:550
121650410irq/29-eth0_g0_13-21kworker/0:123:47:020
121650410irq/29-eth0_g0_13-21kworker/0:123:18:240
121650410irq/29-eth0_g0_13-21kworker/0:122:17:420
121650410irq/29-eth0_g0_13-21kworker/0:100:30:090
121410ksoftirqd/12119799cyclictest19:33:241
121410ksoftirqd/1121750irq/30-eth0_g0_20:30:110
121410ksoftirqd/1121750irq/30-eth0_g0_19:56:480
121410ksoftirqd/1121650irq/29-eth0_g0_22:06:550
2119799409cyclictest121750irq/30-eth0_g0_19:10:101
21197994016cyclictest1769-21unixbench_multi20:00:101
21197994013cyclictest16135-21/usr/sbin/munin21:00:041
2119799401cyclictest28094-21unixbench_singl19:35:101
2119799401cyclictest28094-21unixbench_singl19:35:101
121750400irq/30-eth0_g0_27725-21missed_timers19:35:030
121750400irq/30-eth0_g0_27725-21missed_timers19:35:030
121750400irq/30-eth0_g0_1875-21runrttasks23:02:270
121750400irq/30-eth0_g0_1875-21runrttasks21:00:330
121650400irq/29-eth0_g0_6248-21unixbench_singl22:30:110
121650400irq/29-eth0_g0_29770-21ntp_offset21:55:060
121650400irq/29-eth0_g0_13-21kworker/0:123:56:460
121650400irq/29-eth0_g0_13-21kworker/0:123:54:470
121650400irq/29-eth0_g0_13-21kworker/0:122:10:570
121650400irq/29-eth0_g0_13-21kworker/0:122:02:580
121750390irq/30-eth0_g0_15653-21memory23:10:020
121650390irq/29-eth0_g0_8365-21runrttasks20:29:140
121650390irq/29-eth0_g0_25125-21df_inode19:25:020
121650390irq/29-eth0_g0_2119599cyclictest23:35:050
121650390irq/29-eth0_g0_1768-21unixbench_multi20:00:100
121650390irq/29-eth0_g0_13-21kworker/0:122:52:350
121650390irq/29-eth0_g0_0-21swapper/022:21:090
2119799381cyclictest11696-21vmstat20:40:091
121750380irq/30-eth0_g0_25766-21grep21:39:590
121750380irq/30-eth0_g0_2035-21grep00:25:090
121650380irq/29-eth0_g0_30538-21grep19:45:100
121650380irq/29-eth0_g0_29280-21unixbench_multi19:40:110
121650380irq/29-eth0_g0_1875-21runrttasks21:20:340
121650380irq/29-eth0_g0_13-21kworker/0:123:29:570
121650380irq/29-eth0_g0_13-21kworker/0:100:18:160
121650380irq/29-eth0_g0_13-21kworker/0:100:18:160
121650380irq/29-eth0_g0_12330-21unixbench_multi22:55:080
121750370irq/30-eth0_g0_9805-21sed20:34:590
121750370irq/30-eth0_g0_2175-21lldpd20:49:480
121650370irq/29-eth0_g0_3883-21load20:10:040
121650370irq/29-eth0_g0_30493-21ntp_states00:10:060
121650370irq/29-eth0_g0_2588-21interrupts20:05:010
121650370irq/29-eth0_g0_24390-21unixbench_multi19:20:090
121650370irq/29-eth0_g0_2119599cyclictest00:00:540
121650370irq/29-eth0_g0_14133-21/usr/sbin/munin23:04:580
121650370irq/29-eth0_g0_13-21kworker/0:121:29:190
121650370irq/29-eth0_g0_0-21swapper/022:35:530
121650370irq/29-eth0_g0_0-21swapper/021:46:100
121750360irq/30-eth0_g0_4959-21df20:15:010
121750360irq/30-eth0_g0_0-21swapper/019:50:040
121650360irq/29-eth0_g0_6060-21taskset20:19:590
121650360irq/29-eth0_g0_23139-21grep19:15:100
121650360irq/29-eth0_g0_15163-21taskset20:55:060
121650360irq/29-eth0_g0_15163-21taskset20:55:060
121650360irq/29-eth0_g0_13884-21ps20:50:060
121650360irq/29-eth0_g0_0-21swapper/023:21:330
121650360irq/29-eth0_g0_0-21swapper/019:10:080
121650350irq/29-eth0_g0_11507-21sendmail_mailst20:40:070
121350ksoftirqd/1121650irq/29-eth0_g0_00:35:080
121650320irq/29-eth0_g0_26443-21taskset19:30:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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