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2026-08-13 - 03:28

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 Aug 13, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
981921370sleep1121650irq/29-eth0_g0_23:29:191
121910ksoftirqd/1121750irq/30-eth0_g0_21:03:041
121890ksoftirqd/1121750irq/30-eth0_g0_00:05:470
121860ksoftirqd/1121750irq/30-eth0_g0_22:52:001
172362850sleep1121650irq/29-eth0_g0_00:00:071
121850ksoftirqd/1121750irq/30-eth0_g0_20:02:040
58342720sleep1121750irq/30-eth0_g0_23:12:051
140082700sleep1121750irq/30-eth0_g0_21:33:481
240702680sleep1121750irq/30-eth0_g0_20:02:041
130382610sleep1121750irq/30-eth0_g0_21:31:441
121590ksoftirqd/1121750irq/30-eth0_g0_19:52:131
121530ksoftirqd/1121750irq/30-eth0_g0_21:22:401
294502520sleep1121750irq/30-eth0_g0_22:37:001
121520ksoftirqd/1121750irq/30-eth0_g0_22:03:351
163382510chrt121650irq/29-eth0_g0_21:42:231
163382510chrt121650irq/29-eth0_g0_21:42:231
121500ksoftirqd/1121750irq/30-eth0_g0_22:21:251
178932480sleep1121750irq/30-eth0_g0_21:51:171
121470ksoftirqd/1121750irq/30-eth0_g0_22:07:281
121460ksoftirqd/1121750irq/30-eth0_g0_22:30:200
121460ksoftirqd/1121750irq/30-eth0_g0_22:30:200
121460ksoftirqd/1121650irq/29-eth0_g0_22:28:491
121460ksoftirqd/1121650irq/29-eth0_g0_22:28:491
121460ksoftirqd/1121650irq/29-eth0_g0_22:16:241
121460ksoftirqd/1121650irq/29-eth0_g0_21:16:560
121450ksoftirqd/1121650irq/29-eth0_g0_21:13:051
207792440sleep1121750irq/30-eth0_g0_00:13:401
121750440irq/30-eth0_g0_243972sleep000:28:020
121750440irq/30-eth0_g0_1219-21kworker/1:223:05:551
121440ksoftirqd/1121750irq/30-eth0_g0_23:23:581
121440ksoftirqd/1121650irq/29-eth0_g0_21:56:000
121650430irq/29-eth0_g0_1964-21runrttasks19:50:420
121650430irq/29-eth0_g0_1964-21runrttasks19:04:100
121430ksoftirqd/1121650irq/29-eth0_g0_23:20:020
121430ksoftirqd/1121650irq/29-eth0_g0_23:20:020
121750420irq/30-eth0_g0_25432sleep123:00:121
121750420irq/30-eth0_g0_1219-21kworker/1:221:59:481
121650420irq/29-eth0_g0_121ksoftirqd/123:33:150
121420ksoftirqd/1121750irq/30-eth0_g0_21:34:430
121750410irq/30-eth0_g0_121ksoftirqd/123:36:261
121750410irq/30-eth0_g0_121ksoftirqd/100:07:171
121650410irq/29-eth0_g0_13-21kworker/0:123:37:090
121650410irq/29-eth0_g0_13-21kworker/0:100:33:520
121410ksoftirqd/1121650irq/29-eth0_g0_23:03:390
234342400chrt121750irq/30-eth0_g0_00:26:050
121750400irq/30-eth0_g0_1219-21kworker/1:222:21:581
121750400irq/30-eth0_g0_1219-21kworker/1:221:19:081
121750400irq/30-eth0_g0_121ksoftirqd/123:51:041
121750400irq/30-eth0_g0_121ksoftirqd/121:38:381
121650400irq/29-eth0_g0_4583-21/usr/sbin/munin23:07:040
121650400irq/29-eth0_g0_31ksoftirqd/022:46:190
121650400irq/29-eth0_g0_31ksoftirqd/022:46:190
121650400irq/29-eth0_g0_17189-21ntp_offset21:47:000
121650400irq/29-eth0_g0_13-21kworker/0:123:49:480
121650400irq/29-eth0_g0_13-21kworker/0:123:45:220
121650400irq/29-eth0_g0_13-21kworker/0:123:28:050
121650400irq/29-eth0_g0_13-21kworker/0:123:24:240
121650400irq/29-eth0_g0_13-21kworker/0:122:47:450
121650400irq/29-eth0_g0_13-21kworker/0:122:19:050
121650400irq/29-eth0_g0_13-21kworker/0:122:07:260
121650400irq/29-eth0_g0_13-21kworker/0:121:30:100
121650400irq/29-eth0_g0_13-21kworker/0:121:25:490
121650400irq/29-eth0_g0_13-21kworker/0:100:19:370
121650400irq/29-eth0_g0_13-21kworker/0:100:01:200
121400ksoftirqd/1121750irq/30-eth0_g0_23:37:061
121400ksoftirqd/1121750irq/30-eth0_g0_22:05:080
121400ksoftirqd/1121650irq/29-eth0_g0_21:53:531
121400ksoftirqd/1121650irq/29-eth0_g0_20:37:041
990899391cyclictest6901-21diskmemload00:26:581
990899391cyclictest42272sleep123:06:571
121750390irq/30-eth0_g0_1219-21kworker/1:221:11:241
121650390irq/29-eth0_g0_31ksoftirqd/021:02:000
121650390irq/29-eth0_g0_31ksoftirqd/019:53:280
121650390irq/29-eth0_g0_25378-21/usr/sbin/munin22:21:580
121650390irq/29-eth0_g0_1964-21runrttasks22:39:000
121650390irq/29-eth0_g0_1964-21runrttasks21:01:110
121650390irq/29-eth0_g0_1964-21runrttasks19:12:310
121650390irq/29-eth0_g0_1752-21iostat22:56:570
121650390irq/29-eth0_g0_13-21kworker/0:123:12:020
121390ksoftirqd/1121750irq/30-eth0_g0_22:12:370
121390ksoftirqd/1121750irq/30-eth0_g0_21:42:440
121390ksoftirqd/1121750irq/30-eth0_g0_21:42:440
121390ksoftirqd/1121750irq/30-eth0_g0_21:37:480
121390ksoftirqd/1121750irq/30-eth0_g0_21:10:260
121390ksoftirqd/1121750irq/30-eth0_g0_20:42:310
121390ksoftirqd/1121750irq/30-eth0_g0_19:28:020
121390ksoftirqd/1121750irq/30-eth0_g0_19:07:270
121390ksoftirqd/1121650irq/29-eth0_g0_20:25:351
121390ksoftirqd/1121650irq/29-eth0_g0_00:31:591
121750380irq/30-eth0_g0_1219-21kworker/1:223:17:021
121750380irq/30-eth0_g0_1219-21kworker/1:223:17:021
121750380irq/30-eth0_g0_121ksoftirqd/123:46:421
121750380irq/30-eth0_g0_121ksoftirqd/100:18:431
121650380irq/29-eth0_g0_3318-21chrt20:51:550
121650380irq/29-eth0_g0_1964-21runrttasks20:50:460
121650380irq/29-eth0_g0_1964-21runrttasks20:13:260
121650380irq/29-eth0_g0_1964-21runrttasks20:07:030
121650380irq/29-eth0_g0_19328-21sed00:07:050
121650380irq/29-eth0_g0_13-21kworker/0:122:53:200
121650380irq/29-eth0_g0_13-21kworker/0:121:12:440
121650380irq/29-eth0_g0_13-21kworker/0:100:13:180
121380ksoftirqd/1121750irq/30-eth0_g0_22:31:470
121750370irq/30-eth0_g0_1219-21kworker/1:222:48:011
121750370irq/30-eth0_g0_1219-21kworker/1:222:41:451
121750370irq/30-eth0_g0_1219-21kworker/1:222:41:451
121750370irq/30-eth0_g0_1219-21kworker/1:222:32:381
121750370irq/30-eth0_g0_1219-21kworker/1:200:02:171
121750370irq/30-eth0_g0_0-21swapper/123:51:491
121650370irq/29-eth0_g0_31ksoftirqd/019:21:580
121650370irq/29-eth0_g0_13-21kworker/0:123:53:060
121650370irq/29-eth0_g0_13-21kworker/0:119:17:000
990899361cyclictest19206-21unixbench_multi19:42:071
990899361cyclictest15428-21grep19:27:031
990899361cyclictest127392sleep119:16:571
121750360irq/30-eth0_g0_9451-21unixbench_singl19:02:041
121650360irq/29-eth0_g0_1964-21runrttasks20:39:380
121650360irq/29-eth0_g0_1964-21runrttasks20:17:260
121650360irq/29-eth0_g0_1964-21runrttasks19:32:420
121650360irq/29-eth0_g0_13-21kworker/0:121:57:220
121360ksoftirqd/123055-21awk00:22:061
990899359cyclictest23440-21latency_hist20:01:441
990899352cyclictest3959-21sed20:52:061
990899351cyclictest4600-21df_abs20:56:541
990899351cyclictest19882-21df_abs19:46:551
990899351cyclictest16584-21proc_pri19:32:021
990899351cyclictest0-21swapper/120:44:181
121750350irq/30-eth0_g0_25929-21/usr/sbin/munin20:11:561
121750350irq/30-eth0_g0_18029-21grep19:37:051
121650350irq/29-eth0_g0_31475-21unixbench_multi20:32:060
121650350irq/29-eth0_g0_30285-21sed20:27:080
121650350irq/29-eth0_g0_22832-21timerandwakeup19:57:040
121650350irq/29-eth0_g0_1964-21runrttasks20:22:350
121650350irq/29-eth0_g0_17652-21missed_timers19:36:590
121350ksoftirqd/127566-21chrt20:17:021
301412340sleep130142-21/usr/sbin/munin20:27:061
121750340irq/30-eth0_g0_0-21swapper/120:32:051
121650340irq/29-eth0_g0_1964-21runrttasks19:43:420
9908993326cyclictest10366-21netstat19:06:591
121750330irq/30-eth0_g0_990899cyclictest19:12:061
121750330irq/30-eth0_g0_2479-21awk20:47:001
121750330irq/30-eth0_g0_14144-21proc_pri19:22:031
121650320irq/29-eth0_g0_25364-21unixbench_multi20:07:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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