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2026-08-05 - 10:53

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 Wed Aug 05, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
71072760sleep0121750irq/30-eth0_g0_23:28:020
12812690sleep1121750irq/30-eth0_g0_23:06:481
231452650sleep0121750irq/30-eth0_g0_00:34:110
121630ksoftirqd/1121750irq/30-eth0_g0_00:07:190
121630ksoftirqd/1121750irq/30-eth0_g0_00:07:190
55842570sleep1121750irq/30-eth0_g0_21:12:041
121560ksoftirqd/1121750irq/30-eth0_g0_22:42:550
728999531cyclictest15303-21/usr/sbin/munin19:37:261
728999521cyclictest24174-21seq22:27:151
121520ksoftirqd/1121750irq/30-eth0_g0_21:38:581
728999502cyclictest8840-21iostat19:12:181
728999501cyclictest6034-21/usr/sbin/munin21:12:221
7289994931cyclictest1600-21if_eth023:07:171
728999491cyclictest8269-21unixbench_singl23:32:291
728999491cyclictest1964-21runrttasks20:22:181
121490ksoftirqd/1121650irq/29-eth0_g0_21:57:460
121490ksoftirqd/1121650irq/29-eth0_g0_21:57:460
121490ksoftirqd/1121650irq/29-eth0_g0_00:22:050
728999471cyclictest30120-21grep22:52:041
121750470irq/30-eth0_g0_121ksoftirqd/123:54:131
121750470irq/30-eth0_g0_121ksoftirqd/122:54:051
121750470irq/30-eth0_g0_121ksoftirqd/122:54:051
121750470irq/30-eth0_g0_121ksoftirqd/122:23:141
121750470irq/30-eth0_g0_121ksoftirqd/121:20:521
121650470irq/29-eth0_g0_728999cyclictest19:27:221
121470ksoftirqd/1121650irq/29-eth0_g0_21:45:331
728999461cyclictest9570-21latency21:27:181
728999461cyclictest4306-21diskmemload00:20:321
728999461cyclictest2386-21proc_pri20:57:231
121750460irq/30-eth0_g0_121ksoftirqd/123:37:201
121650460irq/29-eth0_g0_728999cyclictest22:00:091
121650460irq/29-eth0_g0_728999cyclictest22:00:091
728999451cyclictest4306-21diskmemload23:42:161
121750450irq/30-eth0_g0_30745-21df20:42:131
121750450irq/30-eth0_g0_1499watchdog/121:25:311
121750450irq/30-eth0_g0_121ksoftirqd/123:01:061
728999442cyclictest181542sleep100:13:081
121750440irq/30-eth0_g0_121ksoftirqd/123:25:171
121750440irq/30-eth0_g0_121ksoftirqd/122:39:391
121750440irq/30-eth0_g0_121ksoftirqd/121:32:221
121440ksoftirqd/1121650irq/29-eth0_g0_00:10:161
121440ksoftirqd/1121650irq/29-eth0_g0_00:10:161
121750430irq/30-eth0_g0_121ksoftirqd/122:02:161
121650430irq/29-eth0_g0_728999cyclictest23:57:251
121430ksoftirqd/1121750irq/30-eth0_g0_21:38:260
121750420irq/30-eth0_g0_121ksoftirqd/122:14:201
121750420irq/30-eth0_g0_121ksoftirqd/119:57:231
121750420irq/30-eth0_g0_121ksoftirqd/119:52:201
121750420irq/30-eth0_g0_121ksoftirqd/119:10:001
121750420irq/30-eth0_g0_121ksoftirqd/100:04:001
121650420irq/29-eth0_g0_1964-21runrttasks19:03:261
121420ksoftirqd/1121750irq/30-eth0_g0_23:34:360
121750410irq/30-eth0_g0_728999cyclictest21:52:111
121750410irq/30-eth0_g0_2795-21df_inode23:12:161
121750410irq/30-eth0_g0_1219-21kworker/1:223:19:311
121750410irq/30-eth0_g0_121ksoftirqd/123:47:151
121750410irq/30-eth0_g0_121ksoftirqd/122:33:201
121750410irq/30-eth0_g0_121ksoftirqd/121:50:101
121750410irq/30-eth0_g0_121ksoftirqd/120:12:181
121750410irq/30-eth0_g0_121ksoftirqd/100:30:001
121750410irq/30-eth0_g0_121ksoftirqd/100:26:281
121650410irq/29-eth0_g0_6435-21memory19:02:190
121650410irq/29-eth0_g0_13-21kworker/0:100:28:440
121410ksoftirqd/1121750irq/30-eth0_g0_23:38:420
121410ksoftirqd/1121750irq/30-eth0_g0_22:22:190
121750400irq/30-eth0_g0_121ksoftirqd/123:31:261
121750400irq/30-eth0_g0_121ksoftirqd/122:17:171
121750390irq/30-eth0_g0_121ksoftirqd/122:44:381
121750390irq/30-eth0_g0_121ksoftirqd/100:32:101
121650390irq/29-eth0_g0_31ksoftirqd/000:22:020
121650390irq/29-eth0_g0_13-21kworker/0:123:14:360
121650390irq/29-eth0_g0_13-21kworker/0:123:07:220
121650390irq/29-eth0_g0_13-21kworker/0:122:55:390
121650390irq/29-eth0_g0_13-21kworker/0:122:55:390
121650390irq/29-eth0_g0_13-21kworker/0:122:10:210
121650390irq/29-eth0_g0_13-21kworker/0:100:16:050
121650380irq/29-eth0_g0_13-21kworker/0:122:47:440
121650380irq/29-eth0_g0_13-21kworker/0:122:37:220
121650380irq/29-eth0_g0_13-21kworker/0:122:02:070
121650380irq/29-eth0_g0_13-21kworker/0:121:52:340
121380ksoftirqd/1121650irq/29-eth0_g0_20:02:211
7289993731cyclictest30594-21cat20:42:031
728999371cyclictest27270-21wc20:27:191
121650370irq/29-eth0_g0_31ksoftirqd/023:45:120
121650370irq/29-eth0_g0_26461-21unixbench_singl20:22:250
121650370irq/29-eth0_g0_14778-21swap21:47:220
121370ksoftirqd/1121750irq/30-eth0_g0_22:20:030
121370ksoftirqd/1121750irq/30-eth0_g0_00:03:080
728999362cyclictest11526-21proc_pri19:22:231
728999361cyclictest32303-21ntp_offset20:47:221
273732360sleep027376-21netstat20:27:200
121750360irq/30-eth0_g0_728999cyclictest20:32:241
121750360irq/30-eth0_g0_0-21swapper/119:17:201
121750360irq/30-eth0_g0_0-21swapper/119:17:201
121650360irq/29-eth0_g0_728899cyclictest21:10:580
121650360irq/29-eth0_g0_31ksoftirqd/021:12:470
121650360irq/29-eth0_g0_28891-21sed20:32:250
121650360irq/29-eth0_g0_19117-21unixbench_singl19:52:250
121650360irq/29-eth0_g0_13-21kworker/0:123:59:360
121650360irq/29-eth0_g0_13-21kworker/0:123:47:500
121650360irq/29-eth0_g0_13-21kworker/0:123:02:070
121650360irq/29-eth0_g0_13-21kworker/0:122:57:240
121650360irq/29-eth0_g0_13-21kworker/0:122:29:460
121650360irq/29-eth0_g0_13-21kworker/0:121:45:190
121650360irq/29-eth0_g0_13-21kworker/0:121:34:060
121650360irq/29-eth0_g0_13-21kworker/0:121:18:500
728999351cyclictest22697-21cat20:07:251
121750350irq/30-eth0_g0_754-21df_abs20:52:181
121750350irq/30-eth0_g0_16651-21sed19:42:261
121650350irq/29-eth0_g0_13-21kworker/0:122:12:170
121650350irq/29-eth0_g0_13-21kworker/0:121:23:340
121650350irq/29-eth0_g0_0-21swapper/022:34:130
728999342cyclictest17554-21netstat19:47:201
728999341cyclictest3695-21ps21:02:241
121650340irq/29-eth0_g0_3844-21unixbench_singl21:02:260
121650340irq/29-eth0_g0_15487-21runrttasks19:37:320
121650340irq/29-eth0_g0_0-21swapper/023:22:130
121650340irq/29-eth0_g0_0-21swapper/023:18:110
728999331cyclictest4306-21diskmemload22:11:301
728999331cyclictest14154-21grep19:32:251
121750330irq/30-eth0_g0_1964-21runrttasks19:21:530
121750330irq/30-eth0_g0_1964-21runrttasks19:21:530
121750330irq/30-eth0_g0_131322sleep019:28:390
121750330irq/30-eth0_g0_12454-21/usr/sbin/munin23:52:170
121650330irq/29-eth0_g0_728899cyclictest21:31:180
121650330irq/29-eth0_g0_728899cyclictest20:21:510
121650330irq/29-eth0_g0_728899cyclictest20:02:150
121650330irq/29-eth0_g0_29927-21proc_pri20:37:240
121650330irq/29-eth0_g0_22468-21netstat20:07:200
121650330irq/29-eth0_g0_20271-21tail19:57:250
121650330irq/29-eth0_g0_14051-21sendmail_mailqu19:32:230
728999322cyclictest24700-21df_inode20:17:131
121750320irq/30-eth0_g0_9165-21sendmail_mailtr19:12:250
121650320irq/29-eth0_g0_30976-21missed_timers20:42:160
121650320irq/29-eth0_g0_2178-21sshd20:57:180
121650320irq/29-eth0_g0_17485-21/usr/sbin/munin19:47:190
121650320irq/29-eth0_g0_1350-21unixbench_multi20:52:270
121650320irq/29-eth0_g0_0-21swapper/020:47:270
121650320irq/29-eth0_g0_0-21swapper/019:42:350
121650310irq/29-eth0_g0_8282-21sshd19:09:190
121650310irq/29-eth0_g0_11277-21/usr/sbin/munin19:22:180
121650310irq/29-eth0_g0_0-21swapper/020:12:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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