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2026-09-11 - 11:14

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 Fri Sep 11, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121840ksoftirqd/1121650irq/29-eth0_g0_21:22:160
121820ksoftirqd/1121650irq/29-eth0_g0_22:11:410
121720ksoftirqd/1121750irq/30-eth0_g0_19:51:451
121720ksoftirqd/1121750irq/30-eth0_g0_19:51:451
121610ksoftirqd/1121750irq/30-eth0_g0_21:06:121
121550ksoftirqd/1121650irq/29-eth0_g0_22:46:101
191012540sleep0121750irq/30-eth0_g0_21:12:270
241562520sleep0121650irq/29-eth0_g0_21:34:140
121510ksoftirqd/1121750irq/30-eth0_g0_23:24:451
121500ksoftirqd/11999199cyclictest21:43:111
137622460sleep0121750irq/30-eth0_g0_23:04:140
121460ksoftirqd/11999199cyclictest22:26:431
121460ksoftirqd/1121750irq/30-eth0_g0_23:46:321
121460ksoftirqd/1121750irq/30-eth0_g0_22:25:011
121460ksoftirqd/1121650irq/29-eth0_g0_21:52:191
267122450sleep0121650irq/29-eth0_g0_21:45:280
121650450irq/29-eth0_g0_19108-21irqstats23:25:520
121650450irq/29-eth0_g0_19108-21irqstats23:25:520
121450ksoftirqd/1121650irq/29-eth0_g0_21:26:431
121750440irq/30-eth0_g0_31030-21munin-plugin-st00:15:341
121440ksoftirqd/1121750irq/30-eth0_g0_22:13:231
121440ksoftirqd/1121650irq/29-eth0_g0_22:07:331
121750430irq/30-eth0_g0_1219-21kworker/1:222:38:071
121650430irq/29-eth0_g0_31ksoftirqd/000:20:180
121650430irq/29-eth0_g0_13-21kworker/0:122:19:220
19322420sleep0121650irq/29-eth0_g0_00:26:400
121750420irq/30-eth0_g0_1219-21kworker/1:223:12:271
121750420irq/30-eth0_g0_1219-21kworker/1:221:25:251
121650420irq/29-eth0_g0_31ksoftirqd/023:47:290
121650420irq/29-eth0_g0_13-21kworker/0:122:38:240
121650420irq/29-eth0_g0_121ksoftirqd/119:40:510
121420ksoftirqd/1121650irq/29-eth0_g0_22:56:201
27172410sleep0121650irq/29-eth0_g0_20:05:520
121750410irq/30-eth0_g0_1219-21kworker/1:223:52:351
121750410irq/30-eth0_g0_1219-21kworker/1:221:49:551
121650410irq/29-eth0_g0_30615-21uptime00:10:560
121650410irq/29-eth0_g0_31ksoftirqd/000:04:280
121650410irq/29-eth0_g0_1964-21runrttasks23:50:570
121650410irq/29-eth0_g0_19411-21entropy19:00:450
121650410irq/29-eth0_g0_161522sleep023:13:320
121410ksoftirqd/1121650irq/29-eth0_g0_19:55:501
1999199407cyclictest121750irq/30-eth0_g0_00:16:151
1999199401cyclictest313402sleep122:02:151
121750400irq/30-eth0_g0_1219-21kworker/1:223:38:461
121750400irq/30-eth0_g0_1219-21kworker/1:200:08:111
121750400irq/30-eth0_g0_121ksoftirqd/123:09:071
121650400irq/29-eth0_g0_31ksoftirqd/000:23:000
121650400irq/29-eth0_g0_1964-21runrttasks21:59:470
121650400irq/29-eth0_g0_13-21kworker/0:123:56:030
121650400irq/29-eth0_g0_13-21kworker/0:123:22:160
121650400irq/29-eth0_g0_13-21kworker/0:122:25:070
121650400irq/29-eth0_g0_13-21kworker/0:121:47:340
121650400irq/29-eth0_g0_13-21kworker/0:121:26:530
121650400irq/29-eth0_g0_121ksoftirqd/123:31:111
121650400irq/29-eth0_g0_121ksoftirqd/122:58:530
121650400irq/29-eth0_g0_121ksoftirqd/121:10:010
1999199392cyclictest7230-21/usr/sbin/munin20:25:481
1999199392cyclictest32725-21/usr/sbin/munin00:20:521
1999199392cyclictest16999-21cat23:15:551
1999199391cyclictest9837-21taskset20:35:471
1999199391cyclictest6070-21sed22:30:581
1999199391cyclictest30508-21grep19:45:561
121750390irq/30-eth0_g0_4300-21vmstat20:10:581
121750390irq/30-eth0_g0_29850-21timerandwakeup21:55:581
121750390irq/30-eth0_g0_1219-21kworker/1:223:57:021
121750390irq/30-eth0_g0_1219-21kworker/1:222:45:081
121650390irq/29-eth0_g0_9175-21/usr/sbin/munin20:30:570
121650390irq/29-eth0_g0_31ksoftirqd/023:06:030
121650390irq/29-eth0_g0_31ksoftirqd/022:46:110
121650390irq/29-eth0_g0_13-21kworker/0:123:19:510
121650390irq/29-eth0_g0_13-21kworker/0:122:01:560
121650390irq/29-eth0_g0_13-21kworker/0:100:08:010
121650390irq/29-eth0_g0_121ksoftirqd/122:55:230
121650390irq/29-eth0_g0_121ksoftirqd/100:34:161
121650390irq/29-eth0_g0_121ksoftirqd/100:33:020
1999199382cyclictest26758-21sendmail_mailtr19:30:551
1999199382cyclictest16472-21grep21:00:571
1999199381cyclictest24782-21open_files21:35:541
1999199381cyclictest0-21swapper/119:05:501
1999199381cyclictest0-21swapper/119:05:501
121750380irq/30-eth0_g0_1219-21kworker/1:221:16:551
121750380irq/30-eth0_g0_121ksoftirqd/122:17:351
121750380irq/30-eth0_g0_121ksoftirqd/121:35:151
121750380irq/30-eth0_g0_0-21swapper/120:45:491
121650380irq/29-eth0_g0_532-21grep19:55:580
121650380irq/29-eth0_g0_20468-21ntpdc19:05:530
121650380irq/29-eth0_g0_20468-21ntpdc19:05:530
121650380irq/29-eth0_g0_20224-21df_abs23:30:470
121650380irq/29-eth0_g0_1964-21runrttasks20:40:390
121650380irq/29-eth0_g0_1964-21runrttasks19:17:350
121650380irq/29-eth0_g0_13-21kworker/0:123:44:110
121650380irq/29-eth0_g0_13-21kworker/0:122:45:050
121650380irq/29-eth0_g0_13-21kworker/0:122:30:490
121650380irq/29-eth0_g0_13-21kworker/0:121:17:220
121380ksoftirqd/1121650irq/29-eth0_g0_19:40:551
1999199372cyclictest25631-21unixbench_multi19:25:561
1999199371cyclictest14074-21vmstat20:50:571
1999199371cyclictest131552sleep123:00:541
121750370irq/30-eth0_g0_24144-21ntp_offset19:20:511
121650370irq/29-eth0_g0_31ksoftirqd/021:52:310
121650370irq/29-eth0_g0_1964-21runrttasks20:10:470
121650370irq/29-eth0_g0_1964-21runrttasks19:50:560
121650370irq/29-eth0_g0_1964-21runrttasks19:50:560
121650370irq/29-eth0_g0_1964-21runrttasks19:37:080
121650370irq/29-eth0_g0_1964-21runrttasks19:31:460
121650370irq/29-eth0_g0_13-21kworker/0:123:36:100
121650370irq/29-eth0_g0_13-21kworker/0:122:25:380
121650370irq/29-eth0_g0_13-21kworker/0:122:06:210
121650370irq/29-eth0_g0_13-21kworker/0:121:37:510
121650370irq/29-eth0_g0_1079-21/usr/sbin/munin20:00:480
1999199361cyclictest27668-21wc19:35:491
121750360irq/30-eth0_g0_16924-21diskmemload00:00:551
121750360irq/30-eth0_g0_1219-21kworker/1:223:29:041
121750360irq/30-eth0_g0_1219-21kworker/1:223:29:041
121750360irq/30-eth0_g0_1219-21kworker/1:221:15:311
121750360irq/30-eth0_g0_1219-21kworker/1:200:27:461
121650360irq/29-eth0_g0_6254-21latency20:20:491
121650360irq/29-eth0_g0_21627-21ls19:10:500
121650360irq/29-eth0_g0_1964-21runrttasks21:02:410
121650360irq/29-eth0_g0_1964-21runrttasks20:38:390
121650360irq/29-eth0_g0_1964-21runrttasks20:28:430
121650360irq/29-eth0_g0_12715-21timerandwakeup20:45:580
1999199351cyclictest9094-21unixbench_multi20:30:561
1999199351cyclictest5516-21vmstat20:15:561
1999199351cyclictest0-21swapper/120:43:241
121650350irq/29-eth0_g0_25624-21unixbench_multi19:25:560
121650350irq/29-eth0_g0_2109-21lldpd20:51:050
121650350irq/29-eth0_g0_1964-21runrttasks20:57:140
121350ksoftirqd/1121750irq/30-eth0_g0_22:51:391
1999199341cyclictest2585-21latency20:05:491
121750340irq/30-eth0_g0_14564-21cpu20:55:451
121650340irq/29-eth0_g0_23755-21/usr/sbin/munin19:20:450
121650340irq/29-eth0_g0_1999199cyclictest19:10:561
121650340irq/29-eth0_g0_19988-21munin-run19:05:351
121650340irq/29-eth0_g0_1964-21runrttasks20:19:330
1999199331cyclictest23046-21taskset19:15:531
121750330irq/30-eth0_g0_1219-21kworker/1:223:45:121
121650330irq/29-eth0_g0_6300-21/usr/sbin/munin20:20:500
121750320irq/30-eth0_g0_1651-21awk20:00:561
121650320irq/29-eth0_g0_30162-21missed_timers19:45:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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