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2026-07-09 - 12:05

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 Thu Jul 09, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1502521330sleep1121650irq/29-eth0_g0_23:05:401
2711821300sleep0121650irq/29-eth0_g0_23:53:300
342521120sleep1121650irq/29-eth0_g0_00:30:041
121950ksoftirqd/1121750irq/30-eth0_g0_19:03:241
121850ksoftirqd/1121750irq/30-eth0_g0_00:28:420
121830ksoftirqd/1121750irq/30-eth0_g0_21:08:181
279692620sleep0121650irq/29-eth0_g0_21:47:300
121580ksoftirqd/1121750irq/30-eth0_g0_22:00:550
312452520sleep0121750irq/30-eth0_g0_00:13:080
161702500sleep0121750irq/30-eth0_g0_23:09:430
121470ksoftirqd/1121650irq/29-eth0_g0_22:53:291
121470ksoftirqd/1121650irq/29-eth0_g0_00:25:291
121650460irq/29-eth0_g0_899watchdog/000:23:080
121460ksoftirqd/1121650irq/29-eth0_g0_21:21:441
15612450sleep1121750irq/30-eth0_g0_22:11:181
121650450irq/29-eth0_g0_121ksoftirqd/121:58:311
121450ksoftirqd/1121650irq/29-eth0_g0_21:17:571
322642440sleep1121650irq/29-eth0_g0_00:16:171
322642440sleep1121650irq/29-eth0_g0_00:16:171
121750440irq/30-eth0_g0_1219-21kworker/1:223:33:391
121750440irq/30-eth0_g0_1219-21kworker/1:222:47:471
212202420sleep1121750irq/30-eth0_g0_23:31:191
121750420irq/30-eth0_g0_1219-21kworker/1:223:45:001
121650420irq/29-eth0_g0_1964-21runrttasks19:05:130
121420ksoftirqd/1121750irq/30-eth0_g0_22:44:420
121420ksoftirqd/1121750irq/30-eth0_g0_22:14:531
121420ksoftirqd/1121650irq/29-eth0_g0_23:52:160
121750410irq/30-eth0_g0_279912sleep121:47:461
121750410irq/30-eth0_g0_1219-21kworker/1:222:27:411
121750410irq/30-eth0_g0_121ksoftirqd/122:58:501
121750410irq/30-eth0_g0_121ksoftirqd/119:28:271
121650410irq/29-eth0_g0_13-21kworker/0:121:54:430
121650400irq/29-eth0_g0_7933-21unixbench_singl20:23:290
121650400irq/29-eth0_g0_7933-21unixbench_singl20:23:290
121650400irq/29-eth0_g0_285712sleep000:01:090
121650400irq/29-eth0_g0_20146-21grep21:13:300
121650400irq/29-eth0_g0_13-21kworker/0:122:12:370
121400ksoftirqd/1121750irq/30-eth0_g0_21:22:590
121400ksoftirqd/1121750irq/30-eth0_g0_19:38:261
121400ksoftirqd/1121750irq/30-eth0_g0_00:21:311
121400ksoftirqd/1121650irq/29-eth0_g0_22:17:180
121750390irq/30-eth0_g0_1219-21kworker/1:222:33:521
121750390irq/30-eth0_g0_1219-21kworker/1:222:31:041
121750390irq/30-eth0_g0_1219-21kworker/1:221:57:171
121750390irq/30-eth0_g0_121ksoftirqd/123:08:341
121750390irq/30-eth0_g0_121ksoftirqd/121:23:431
121750390irq/30-eth0_g0_121ksoftirqd/100:05:281
121650390irq/29-eth0_g0_87702sleep022:39:190
121650390irq/29-eth0_g0_87702sleep022:39:190
121650390irq/29-eth0_g0_31ksoftirqd/023:34:490
121650390irq/29-eth0_g0_24293-21netstat23:43:240
121650390irq/29-eth0_g0_13-21kworker/0:122:58:290
121650390irq/29-eth0_g0_13-21kworker/0:121:30:380
121650390irq/29-eth0_g0_121ksoftirqd/123:51:241
121390ksoftirqd/1121750irq/30-eth0_g0_21:38:580
121750380irq/30-eth0_g0_1964-21runrttasks20:44:361
121750380irq/30-eth0_g0_1219-21kworker/1:223:56:281
121750380irq/30-eth0_g0_1219-21kworker/1:222:39:581
121750380irq/30-eth0_g0_1219-21kworker/1:222:39:581
121750380irq/30-eth0_g0_1219-21kworker/1:222:19:431
121750380irq/30-eth0_g0_1219-21kworker/1:221:38:491
121750380irq/30-eth0_g0_121ksoftirqd/123:25:341
121750380irq/30-eth0_g0_121ksoftirqd/123:25:341
121650380irq/29-eth0_g0_40842sleep022:21:520
121650380irq/29-eth0_g0_334-21load00:18:220
121650380irq/29-eth0_g0_29897-21df_abs19:43:170
121650380irq/29-eth0_g0_21892-21unixbench_multi19:08:300
121650380irq/29-eth0_g0_1964-21runrttasks21:36:030
121650380irq/29-eth0_g0_19245-21irqstats23:23:190
121650380irq/29-eth0_g0_19245-21irqstats23:23:190
121650380irq/29-eth0_g0_13-21kworker/0:123:18:220
121650380irq/29-eth0_g0_13-21kworker/0:123:18:220
121650380irq/29-eth0_g0_13-21kworker/0:122:31:310
121650380irq/29-eth0_g0_13-21kworker/0:121:24:400
121650380irq/29-eth0_g0_13-21kworker/0:121:09:000
121650380irq/29-eth0_g0_13-21kworker/0:100:34:060
121650380irq/29-eth0_g0_12111-21proc_pri22:53:270
121650380irq/29-eth0_g0_0-21swapper/000:07:040
121380ksoftirqd/130753-21unixbench_singl00:08:281
121750370irq/30-eth0_g0_1219-21kworker/1:223:39:291
121750370irq/30-eth0_g0_1219-21kworker/1:223:13:291
121750370irq/30-eth0_g0_1219-21kworker/1:222:49:171
121750370irq/30-eth0_g0_1219-21kworker/1:222:03:561
121750370irq/30-eth0_g0_121ksoftirqd/100:34:271
121750370irq/30-eth0_g0_0-21swapper/121:48:331
121750370irq/30-eth0_g0_0-21swapper/121:48:331
121650370irq/29-eth0_g0_6745-21vmstat20:18:291
121650370irq/29-eth0_g0_6745-21vmstat20:18:291
121650370irq/29-eth0_g0_1964-21runrttasks21:04:280
121650370irq/29-eth0_g0_13-21kworker/0:123:08:080
121650370irq/29-eth0_g0_13-21kworker/0:122:50:110
121650370irq/29-eth0_g0_13-21kworker/0:122:34:540
121650370irq/29-eth0_g0_13-21kworker/0:122:26:120
121650370irq/29-eth0_g0_13-21kworker/0:121:49:480
121650370irq/29-eth0_g0_13-21kworker/0:121:49:480
121650370irq/29-eth0_g0_13-21kworker/0:100:14:570
121650370irq/29-eth0_g0_13-21kworker/0:100:14:570
121650370irq/29-eth0_g0_1219-21kworker/1:221:33:591
121650370irq/29-eth0_g0_121ksoftirqd/121:31:011
121750360irq/30-eth0_g0_31ksoftirqd/022:03:550
121750360irq/30-eth0_g0_1964-21runrttasks20:26:151
121750360irq/30-eth0_g0_1964-21runrttasks20:26:151
121750360irq/30-eth0_g0_1219-21kworker/1:223:59:261
121650360irq/29-eth0_g0_5928-21latency_hist20:18:080
121650360irq/29-eth0_g0_5928-21latency_hist20:18:080
121650360irq/29-eth0_g0_26341-21if_err_eth019:28:210
121650360irq/29-eth0_g0_1964-21runrttasks21:01:400
121650360irq/29-eth0_g0_14733-21df_abs20:53:190
121650360irq/29-eth0_g0_14018-21grep20:48:280
121650360irq/29-eth0_g0_13-21kworker/0:123:38:520
121650360irq/29-eth0_g0_13-21kworker/0:123:30:160
121360ksoftirqd/1121750irq/30-eth0_g0_23:13:190
21149993520cyclictest17617-21mailstats21:03:261
121750350irq/30-eth0_g0_2390-21/usr/sbin/munin20:03:191
121750350irq/30-eth0_g0_21372-21df_abs19:08:191
121750350irq/30-eth0_g0_1219-21kworker/1:223:18:151
121750350irq/30-eth0_g0_1219-21kworker/1:223:18:151
121750350irq/30-eth0_g0_121ksoftirqd/120:00:221
121650350irq/29-eth0_g0_9181-21unixbench_singl20:28:300
121650350irq/29-eth0_g0_6970-21runrttasks20:21:040
121650350irq/29-eth0_g0_6970-21runrttasks20:21:040
121650350irq/29-eth0_g0_23028-21/usr/sbin/munin19:13:290
121650350irq/29-eth0_g0_11556-21grep20:38:270
121650350irq/29-eth0_g0_0-21swapper/020:13:080
121650350irq/29-eth0_g0_0-21swapper/020:03:080
121750340irq/30-eth0_g0_0-21swapper/119:48:231
121650340irq/29-eth0_g0_9696-21/usr/sbin/munin20:33:190
121650340irq/29-eth0_g0_498-21sed19:53:280
121650340irq/29-eth0_g0_32199-21/usr/sbin/munin19:53:080
121650340irq/29-eth0_g0_28845-21irqstats19:38:220
121650340irq/29-eth0_g0_25382-21proc_pri19:23:250
121650340irq/29-eth0_g0_24096-21ntp_states19:18:240
121650340irq/29-eth0_g0_24096-21ntp_states19:18:240
121650340irq/29-eth0_g0_12693-21sendmail_mailqu20:43:270
121650340irq/29-eth0_g0_0-21swapper/020:07:050
121650330irq/29-eth0_g0_27379-21/usr/sbin/munin19:33:200
121650330irq/29-eth0_g0_1964-21runrttasks19:27:191
309732320sleep130982-21latency_hist19:48:081
121750320irq/30-eth0_g0_2114999cyclictest20:53:181
121750320irq/30-eth0_g0_1964-21runrttasks20:15:101
121750320irq/30-eth0_g0_1964-21runrttasks20:15:101
121750310irq/30-eth0_g0_23176-21unixbench_singl19:13:301
121750310irq/30-eth0_g0_1964-21runrttasks20:09:071
121750310irq/30-eth0_g0_1964-21runrttasks19:36:301
121750310irq/30-eth0_g0_13782-21ntp_states20:48:251
121750310irq/30-eth0_g0_0-21swapper/120:59:421
121750310irq/30-eth0_g0_0-21swapper/120:30:211
121310ksoftirqd/11023-21date19:58:081
121750300irq/30-eth0_g0_1964-21runrttasks20:37:061
2114999291cyclictest24836-21latency_hist19:23:081
2114999291cyclictest24836-21latency_hist19:23:081
21149992722cyclictest11385-21proc_pri20:38:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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