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2026-09-08 - 01:57

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 Tue Sep 08, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2831921360sleep0121750irq/30-eth0_g0_23:12:180
1224921050sleep0121650irq/29-eth0_g0_22:06:060
121880ksoftirqd/1121750irq/30-eth0_g0_23:32:261
121880ksoftirqd/1121750irq/30-eth0_g0_23:32:261
121790ksoftirqd/1121750irq/30-eth0_g0_22:57:421
77362630sleep0121750irq/30-eth0_g0_21:48:150
121620ksoftirqd/1121650irq/29-eth0_g0_23:59:491
172962560sleep0121750irq/30-eth0_g0_22:26:230
317362530chrt121750irq/30-eth0_g0_23:26:031
121530ksoftirqd/1121750irq/30-eth0_g0_21:16:521
115812530sleep0121750irq/30-eth0_g0_22:05:300
121510ksoftirqd/1121650irq/29-eth0_g0_00:18:131
249312480sleep0121650irq/29-eth0_g0_23:00:290
121460ksoftirqd/1121750irq/30-eth0_g0_22:47:431
121460ksoftirqd/1121750irq/30-eth0_g0_21:36:391
121450ksoftirqd/1121750irq/30-eth0_g0_23:11:071
121450ksoftirqd/1121750irq/30-eth0_g0_22:19:101
121450ksoftirqd/1121750irq/30-eth0_g0_21:54:051
121750440irq/30-eth0_g0_1219-21kworker/1:222:33:361
121440ksoftirqd/1121750irq/30-eth0_g0_21:12:401
121440ksoftirqd/1121750irq/30-eth0_g0_21:12:401
121750430irq/30-eth0_g0_42112sleep121:34:431
121430ksoftirqd/1121750irq/30-eth0_g0_22:27:021
121750420irq/30-eth0_g0_121ksoftirqd/100:07:351
121650420irq/29-eth0_g0_86642sleep021:51:040
121650420irq/29-eth0_g0_21752-21vmstat20:31:060
121420ksoftirqd/1121650irq/29-eth0_g0_23:37:001
121420ksoftirqd/1121650irq/29-eth0_g0_21:49:371
121750410irq/30-eth0_g0_121ksoftirqd/100:26:021
121650410irq/29-eth0_g0_31895-21latency19:00:560
121650410irq/29-eth0_g0_30242-21vmstat21:06:060
121650410irq/29-eth0_g0_20862-21head22:41:050
121650410irq/29-eth0_g0_20862-21head22:41:050
121650410irq/29-eth0_g0_13-21kworker/0:123:55:540
121650410irq/29-eth0_g0_13-21kworker/0:123:30:030
121650410irq/29-eth0_g0_13-21kworker/0:122:51:120
121650410irq/29-eth0_g0_13-21kworker/0:122:13:330
121650410irq/29-eth0_g0_10043-21ntp_offset00:11:000
30899401cyclictest859-21taskset21:20:541
30899401cyclictest10041-21awk00:11:001
121650400irq/29-eth0_g0_31ksoftirqd/022:21:330
121650400irq/29-eth0_g0_31ksoftirqd/021:15:570
121650400irq/29-eth0_g0_2612-21latency23:40:570
121650400irq/29-eth0_g0_185552sleep022:31:570
121650400irq/29-eth0_g0_15072sleep021:21:400
121650400irq/29-eth0_g0_13-21kworker/0:122:47:520
121650400irq/29-eth0_g0_13-21kworker/0:100:30:530
30899391cyclictest6732-21chrt21:45:421
121750390irq/30-eth0_g0_1219-21kworker/1:223:53:151
121750390irq/30-eth0_g0_1219-21kworker/1:223:44:511
121750390irq/30-eth0_g0_1219-21kworker/1:222:45:221
121750390irq/30-eth0_g0_1219-21kworker/1:222:45:221
121750390irq/30-eth0_g0_1219-21kworker/1:222:01:251
121750390irq/30-eth0_g0_121ksoftirqd/122:21:161
121650390irq/29-eth0_g0_7504-21memory00:00:560
121650390irq/29-eth0_g0_31ksoftirqd/021:30:420
121650390irq/29-eth0_g0_31ksoftirqd/000:15:580
121650390irq/29-eth0_g0_13-21kworker/0:122:36:510
121650390irq/29-eth0_g0_121ksoftirqd/123:06:031
30899381cyclictest19973-21forks20:25:551
121750380irq/30-eth0_g0_23444-21/usr/sbin/munin20:40:591
121750380irq/30-eth0_g0_1219-21kworker/1:223:15:591
121750380irq/30-eth0_g0_1219-21kworker/1:223:03:071
121750380irq/30-eth0_g0_1219-21kworker/1:222:15:331
121750380irq/30-eth0_g0_1219-21kworker/1:222:07:271
121750380irq/30-eth0_g0_1219-21kworker/1:221:27:261
121750380irq/30-eth0_g0_121ksoftirqd/121:10:271
121750380irq/30-eth0_g0_0-21swapper/123:46:111
121650380irq/29-eth0_g0_30089-21forks23:20:560
121650380irq/29-eth0_g0_31ksoftirqd/022:18:310
121650380irq/29-eth0_g0_13-21kworker/0:123:33:440
121650380irq/29-eth0_g0_13-21kworker/0:123:33:440
121650380irq/29-eth0_g0_13-21kworker/0:123:20:170
121650380irq/29-eth0_g0_13-21kworker/0:123:07:200
121650380irq/29-eth0_g0_13-21kworker/0:121:38:230
121650380irq/29-eth0_g0_13-21kworker/0:121:32:320
121650380irq/29-eth0_g0_13-21kworker/0:100:06:170
121650380irq/29-eth0_g0_12759-21unixbench_singl00:21:040
30899372cyclictest7174-21grep19:31:051
30899372cyclictest10022-21munin-run19:45:421
30899372cyclictest10022-21munin-run19:45:421
30899371cyclictest22900-21memory22:50:581
30899371cyclictest2249-21cat19:11:031
30899371cyclictest0-21swapper/119:47:371
121750370irq/30-eth0_g0_13-21kworker/0:123:46:110
121750370irq/30-eth0_g0_1219-21kworker/1:221:59:401
121750370irq/30-eth0_g0_1219-21kworker/1:200:23:211
121650370irq/29-eth0_g0_9871-21cat21:56:020
121650370irq/29-eth0_g0_6393-21chrt21:41:430
121650370irq/29-eth0_g0_4784-21unixbench_singl19:21:060
121650370irq/29-eth0_g0_4784-21unixbench_singl19:21:060
121650370irq/29-eth0_g0_24788-21df20:45:530
121650370irq/29-eth0_g0_24788-21df20:45:530
121650370irq/29-eth0_g0_20197-21taskset20:26:010
121650370irq/29-eth0_g0_1964-21runrttasks23:51:050
121650370irq/29-eth0_g0_13-21kworker/0:123:36:400
121650370irq/29-eth0_g0_13-21kworker/0:123:04:330
121650370irq/29-eth0_g0_13-21kworker/0:121:11:350
121650370irq/29-eth0_g0_13-21kworker/0:121:11:350
121650370irq/29-eth0_g0_0-21swapper/020:05:590
308993630cyclictest1964-21runrttasks20:22:541
30899362cyclictest5450-21df_inode19:25:561
30899362cyclictest22825-21cat20:36:041
30899362cyclictest1964-21runrttasks20:11:571
30899362cyclictest1964-21runrttasks19:40:331
30899361cyclictest26515-21grep20:51:031
30899361cyclictest14520-21/usr/sbin/munin00:31:081
30899361cyclictest140402sleep120:00:591
30899361cyclictest12819-21/usr/sbin/munin19:55:571
30899361cyclictest11727-21seq19:51:021
121750360irq/30-eth0_g0_305-21munin-plugin-st19:05:421
121750360irq/30-eth0_g0_3043-21chrt19:15:531
121750360irq/30-eth0_g0_3043-21chrt19:15:531
121750360irq/30-eth0_g0_29208-21chrt21:03:051
121650360irq/29-eth0_g0_6872-21ntpdc19:31:000
121650360irq/29-eth0_g0_660-21latency19:05:580
121650360irq/29-eth0_g0_27729-21tail20:56:050
121650360irq/29-eth0_g0_1964-21runrttasks20:50:580
121650360irq/29-eth0_g0_19258-21/usr/sbin/munin20:21:040
121650360irq/29-eth0_g0_16853-21unixbench_singl20:11:060
121650360irq/29-eth0_g0_13-21kworker/0:100:26:090
121650360irq/29-eth0_g0_10452-21sshd19:45:590
121360ksoftirqd/1121650irq/29-eth0_g0_20:57:231
30899352cyclictest1964-21runrttasks20:16:511
30899352cyclictest1964-21runrttasks20:16:511
30899352cyclictest0-21swapper/100:03:581
30899351cyclictest43282sleep119:20:561
30899351cyclictest43282sleep119:20:561
30899351cyclictest30315-21grep23:21:011
30899351cyclictest0-21swapper/120:31:281
121750350irq/30-eth0_g0_1219-21kworker/1:222:36:461
121650350irq/29-eth0_g0_8086-21ntp_offset19:35:580
121650350irq/29-eth0_g0_24103-21unixbench_multi20:41:040
121650350irq/29-eth0_g0_17706-21missed_timers20:15:570
121650350irq/29-eth0_g0_17706-21missed_timers20:15:570
121650350irq/29-eth0_g0_14385-21grep20:01:050
121650350irq/29-eth0_g0_11711-21/usr/sbin/munin19:51:010
121750340irq/30-eth0_g0_15597-21unixbench_multi20:06:051
121650340irq/29-eth0_g0_3416-21grep19:16:010
121650340irq/29-eth0_g0_3416-21grep19:16:010
121650340irq/29-eth0_g0_28518-21ethtool21:00:580
121650340irq/29-eth0_g0_2056-21ntpq19:10:590
121650340irq/29-eth0_g0_1964-21runrttasks19:58:200
121650340irq/29-eth0_g0_1964-21runrttasks19:27:150
121650330irq/29-eth0_g0_23353-21munin-run20:40:420
121650330irq/29-eth0_g0_0-21swapper/019:40:560
121650330irq/29-eth0_g0_0-21swapper/019:40:560
30899320cyclictest0-21swapper/120:46:001
30899320cyclictest0-21swapper/120:46:001
121750320irq/30-eth0_g0_542-21df_abs19:05:551
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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