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2026-08-08 - 17:46

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 Sat Aug 08, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211110ksoftirqd/1121750irq/30-eth0_g0_11:18:081
1211060ksoftirqd/1121750irq/30-eth0_g0_12:30:431
287882710sleep0121750irq/30-eth0_g0_07:22:130
121710ksoftirqd/1121750irq/30-eth0_g0_10:56:591
235962580sleep1121750irq/30-eth0_g0_09:12:161
121570ksoftirqd/1121750irq/30-eth0_g0_07:22:111
121540ksoftirqd/1121750irq/30-eth0_g0_09:41:110
24552995119cyclictest23232-21runrttasks11:23:121
123092500sleep1121750irq/30-eth0_g0_08:27:131
121650490irq/29-eth0_g0_2968-21grep12:12:190
2455299487cyclictest25682-21missed_timers09:22:081
24552994834cyclictest20635-21unixbench_singl11:12:181
2455299481cyclictest1694-21runrttasks07:44:041
182752480sleep1121750irq/30-eth0_g0_11:02:381
121650480irq/29-eth0_g0_2455299cyclictest10:12:201
121650480irq/29-eth0_g0_2455299cyclictest09:52:151
121650480irq/29-eth0_g0_2455299cyclictest08:16:551
121650480irq/29-eth0_g0_2455299cyclictest08:16:551
121480ksoftirqd/12455299cyclictest10:47:101
121480ksoftirqd/12455299cyclictest10:17:081
24552994722cyclictest2784-21runrttasks10:02:041
149102470sleep0121650irq/29-eth0_g0_10:51:200
121750470irq/30-eth0_g0_2455299cyclictest10:54:581
121750470irq/30-eth0_g0_2455299cyclictest10:45:101
121650470irq/29-eth0_g0_2455299cyclictest11:31:551
121470ksoftirqd/12455299cyclictest09:42:131
121470ksoftirqd/1121750irq/30-eth0_g0_09:31:331
6662460sleep0121650irq/29-eth0_g0_12:03:550
6662460sleep0121650irq/29-eth0_g0_12:03:550
121750460irq/30-eth0_g0_2455299cyclictest11:11:481
121750460irq/30-eth0_g0_1964-21runrttasks08:12:540
121750460irq/30-eth0_g0_1964-21runrttasks08:12:540
121750460irq/30-eth0_g0_121ksoftirqd/111:34:291
121650460irq/29-eth0_g0_2455299cyclictest11:56:031
121650460irq/29-eth0_g0_2455299cyclictest10:35:411
121650460irq/29-eth0_g0_2455299cyclictest10:35:411
121650460irq/29-eth0_g0_2455299cyclictest07:57:161
121650460irq/29-eth0_g0_2455299cyclictest07:32:171
121460ksoftirqd/12455299cyclictest09:32:261
121460ksoftirqd/12455299cyclictest09:32:261
121460ksoftirqd/1121750irq/30-eth0_g0_12:17:571
121460ksoftirqd/1121750irq/30-eth0_g0_10:22:161
121460ksoftirqd/1121750irq/30-eth0_g0_08:07:160
121460ksoftirqd/1121750irq/30-eth0_g0_08:07:160
24552994520cyclictest0-21swapper/108:57:111
2455299451cyclictest32021-21cpu07:37:081
121750450irq/30-eth0_g0_2455299cyclictest12:12:181
121750450irq/30-eth0_g0_21992-21memory09:07:111
121750450irq/30-eth0_g0_121ksoftirqd/110:37:541
121650450irq/29-eth0_g0_2455299cyclictest11:37:131
121650450irq/29-eth0_g0_13-21kworker/0:111:00:350
24552994432cyclictest9701-21load08:17:101
24552994423cyclictest30261-21awk07:27:181
2455299442cyclictest24797-21df_inode07:07:071
24552994417cyclictest7621-21grep08:07:181
24552994417cyclictest7621-21grep08:07:181
24552994417cyclictest13780-21grep08:32:161
2455299441cyclictest26202sleep107:47:141
121750440irq/30-eth0_g0_121ksoftirqd/110:07:431
121750440irq/30-eth0_g0_121ksoftirqd/109:51:121
121750440irq/30-eth0_g0_0-21swapper/108:37:151
121650440irq/29-eth0_g0_23700-21missed_timers07:02:050
121650440irq/29-eth0_g0_21603-21diskmemload09:24:560
121650440irq/29-eth0_g0_1964-21runrttasks09:14:110
121650440irq/29-eth0_g0_13-21kworker/0:112:17:380
121650440irq/29-eth0_g0_0-21swapper/007:17:160
121440ksoftirqd/1121750irq/30-eth0_g0_09:02:101
24552994319cyclictest15880-21missed_timers08:42:111
24552994318cyclictest17474-21sed08:47:161
24552994316cyclictest0-21swapper/112:32:091
24552994310cyclictest18012-21/usr/sbin/munin08:52:071
121750430irq/30-eth0_g0_2455299cyclictest12:11:541
121750430irq/30-eth0_g0_121ksoftirqd/109:57:181
121650430irq/29-eth0_g0_2455299cyclictest11:45:011
121650430irq/29-eth0_g0_1964-21runrttasks11:22:260
121650430irq/29-eth0_g0_1964-21runrttasks10:02:040
121650430irq/29-eth0_g0_13-21kworker/0:110:40:320
121650430irq/29-eth0_g0_13-21kworker/0:110:01:300
121430ksoftirqd/12455299cyclictest12:02:091
121430ksoftirqd/12455299cyclictest12:02:091
121430ksoftirqd/12455299cyclictest11:57:111
121430ksoftirqd/12455299cyclictest09:37:141
2455299422cyclictest6368-21unixbench_multi08:02:171
24552994218cyclictest9574-21unixbench_multi10:27:171
24552994216cyclictest3904-21unixbench_multi07:52:161
24552994212cyclictest121750irq/30-eth0_g0_07:12:171
2455299421cyclictest5265-21grep12:22:151
2455299421cyclictest24157-21cpu09:17:061
121650420irq/29-eth0_g0_13-21kworker/0:112:25:420
121650420irq/29-eth0_g0_13-21kworker/0:111:31:510
121650420irq/29-eth0_g0_13-21kworker/0:109:18:290
121650420irq/29-eth0_g0_13-21kworker/0:109:11:220
121420ksoftirqd/1121750irq/30-eth0_g0_11:52:470
121420ksoftirqd/1121750irq/30-eth0_g0_09:42:150
2455299415cyclictest28014-21runrttasks07:19:211
24552994116cyclictest0-21swapper/111:50:531
2455299411cyclictest115892sleep108:24:431
121650410irq/29-eth0_g0_13-21kworker/0:111:45:580
121650410irq/29-eth0_g0_13-21kworker/0:110:44:200
121650410irq/29-eth0_g0_13-21kworker/0:110:17:390
121650410irq/29-eth0_g0_13-21kworker/0:110:10:460
121650410irq/29-eth0_g0_13-21kworker/0:109:30:450
121410ksoftirqd/1121750irq/30-eth0_g0_08:42:060
121750400irq/30-eth0_g0_9247-21missed_timers10:27:110
121750400irq/30-eth0_g0_15013-21unixbench_singl08:37:150
121650400irq/29-eth0_g0_25279-21unixbench_multi07:07:160
121650400irq/29-eth0_g0_1964-21runrttasks10:15:250
121650400irq/29-eth0_g0_19622-21chrt11:09:030
121650400irq/29-eth0_g0_13-21kworker/0:111:21:380
121650400irq/29-eth0_g0_13-21kworker/0:111:16:380
121650400irq/29-eth0_g0_13-21kworker/0:110:35:460
121650400irq/29-eth0_g0_13-21kworker/0:110:35:460
121400ksoftirqd/1121750irq/30-eth0_g0_12:33:290
121650390irq/29-eth0_g0_21605-21munin-run09:06:540
121650390irq/29-eth0_g0_2047-21/usr/sbin/munin07:47:140
121650390irq/29-eth0_g0_1964-21runrttasks09:00:110
121650390irq/29-eth0_g0_13-21kworker/0:111:57:590
121650390irq/29-eth0_g0_13-21kworker/0:111:03:480
121650390irq/29-eth0_g0_13-21kworker/0:109:49:030
121750380irq/30-eth0_g0_1964-21runrttasks08:28:470
121750380irq/30-eth0_g0_1964-21runrttasks07:52:400
121650380irq/29-eth0_g0_29226-21unixbench_multi11:47:170
121650380irq/29-eth0_g0_15748-21grep10:52:190
121650380irq/29-eth0_g0_1566-21zcat12:07:150
121650380irq/29-eth0_g0_10089-21unixbench_singl08:17:160
121750370irq/30-eth0_g0_26968-21sshd07:16:280
121750370irq/30-eth0_g0_1964-21runrttasks07:03:501
121750370irq/30-eth0_g0_11118-21processes08:22:140
121650370irq/29-eth0_g0_31176-21ntp_offset07:32:120
121650370irq/29-eth0_g0_1964-21runrttasks08:02:330
121650370irq/29-eth0_g0_1964-21runrttasks07:37:250
121750360irq/30-eth0_g0_24963-21sed11:32:070
121650360irq/29-eth0_g0_28514-21unixbench_singl09:32:170
121650360irq/29-eth0_g0_28514-21unixbench_singl09:32:170
121650360irq/29-eth0_g0_1964-21runrttasks08:35:440
121650360irq/29-eth0_g0_17172-21ntp_offset08:47:120
121650360irq/29-eth0_g0_13-21kworker/0:112:27:430
121650360irq/29-eth0_g0_0-21swapper/007:27:180
121750350irq/30-eth0_g0_848-21mailstats09:52:150
121650350irq/29-eth0_g0_7930-21iostat10:22:100
121650350irq/29-eth0_g0_5028-21awk07:57:140
121650350irq/29-eth0_g0_1501-21grep07:42:160
121750340irq/30-eth0_g0_18262-21ls08:52:100
121650340irq/29-eth0_g0_0-21swapper/011:41:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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