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2026-03-15 - 00:31

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 100 highest latencies:
System rack3slot5s.osadl.org (updated Sat Mar 14, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211170ksoftirqd/1121750irq/30-eth0_g0_12:15:461
742421080sleep0121750irq/30-eth0_g0_10:29:430
1211040ksoftirqd/1121750irq/30-eth0_g0_09:11:491
121870ksoftirqd/1121650irq/29-eth0_g0_12:05:070
38022720sleep1121750irq/30-eth0_g0_08:00:081
223422680sleep0121650irq/29-eth0_g0_09:15:180
319772610sleep1121650irq/29-eth0_g0_07:44:501
121590ksoftirqd/1121750irq/30-eth0_g0_07:25:051
121590ksoftirqd/1121750irq/30-eth0_g0_07:25:051
121570ksoftirqd/1121750irq/30-eth0_g0_07:06:091
121570ksoftirqd/1121650irq/29-eth0_g0_09:23:170
121570ksoftirqd/1115852sleep010:45:060
121560ksoftirqd/1121750irq/30-eth0_g0_12:10:281
231212550sleep1121650irq/29-eth0_g0_11:32:111
121510ksoftirqd/1121650irq/29-eth0_g0_09:31:561
321942500sleep1121750irq/30-eth0_g0_09:56:051
121500ksoftirqd/1121750irq/30-eth0_g0_10:55:030
59642490sleep0121650irq/29-eth0_g0_10:21:540
121480ksoftirqd/1121750irq/30-eth0_g0_10:39:441
121470ksoftirqd/1121750irq/30-eth0_g0_11:36:501
121470ksoftirqd/1121750irq/30-eth0_g0_10:47:581
121750460irq/30-eth0_g0_13320-21seq10:52:071
121650460irq/29-eth0_g0_899watchdog/012:20:340
121650450irq/29-eth0_g0_2029-21runrttasks11:47:400
121450ksoftirqd/1121750irq/30-eth0_g0_11:15:101
121450ksoftirqd/1121750irq/30-eth0_g0_10:00:301
121450ksoftirqd/1121650irq/29-eth0_g0_12:37:051
121750440irq/30-eth0_g0_121ksoftirqd/111:44:581
121440ksoftirqd/1121750irq/30-eth0_g0_10:16:051
2336999438cyclictest121750irq/30-eth0_g0_09:28:511
121750430irq/30-eth0_g0_470-21kworker/1:112:28:011
121650430irq/29-eth0_g0_23848-21ntp_offset07:10:060
121430ksoftirqd/1121650irq/29-eth0_g0_11:44:290
121430ksoftirqd/1121650irq/29-eth0_g0_10:29:561
121430ksoftirqd/1121650irq/29-eth0_g0_09:53:071
2336999421cyclictest20361-21/usr/sbin/munin11:20:101
121750420irq/30-eth0_g0_470-21kworker/1:111:08:371
121750420irq/30-eth0_g0_470-21kworker/1:111:01:591
121750420irq/30-eth0_g0_470-21kworker/1:110:55:431
121750420irq/30-eth0_g0_470-21kworker/1:110:24:571
121750420irq/30-eth0_g0_470-21kworker/1:109:38:261
121750420irq/30-eth0_g0_121ksoftirqd/109:53:140
121650420irq/29-eth0_g0_28725-21ntp_offset11:55:050
23369994128cyclictest2029-21runrttasks10:24:431
121750410irq/30-eth0_g0_1797-21ntp_states10:05:061
121750410irq/30-eth0_g0_121ksoftirqd/111:28:230
121650410irq/29-eth0_g0_21070-21grep09:10:110
121650410irq/29-eth0_g0_12422-21/usr/sbin/munin10:50:060
121650410irq/29-eth0_g0_121ksoftirqd/109:55:050
121410ksoftirqd/1121750irq/30-eth0_g0_11:01:060
121750400irq/30-eth0_g0_470-21kworker/1:111:56:291
121750400irq/30-eth0_g0_29398-21proc_pri09:45:071
121650400irq/29-eth0_g0_5226-21vmstat08:05:130
121650400irq/29-eth0_g0_31ksoftirqd/012:17:030
121650400irq/29-eth0_g0_31ksoftirqd/011:12:520
121650400irq/29-eth0_g0_31ksoftirqd/010:42:080
121650400irq/29-eth0_g0_2029-21runrttasks10:03:530
121650400irq/29-eth0_g0_2029-21runrttasks07:07:150
121650400irq/29-eth0_g0_13-21kworker/0:112:10:520
121650400irq/29-eth0_g0_13-21kworker/0:110:33:190
121650400irq/29-eth0_g0_13-21kworker/0:110:11:140
121650400irq/29-eth0_g0_13-21kworker/0:109:34:290
121650400irq/29-eth0_g0_121ksoftirqd/110:39:310
121650400irq/29-eth0_g0_0-21swapper/011:20:080
121400ksoftirqd/1121650irq/29-eth0_g0_09:01:511
47712390sleep0121650irq/29-eth0_g0_10:17:140
23369993911cyclictest24646-21latency_hist07:14:501
2336999391cyclictest2430-21chrt07:55:071
121750390irq/30-eth0_g0_470-21kworker/1:111:10:331
121750390irq/30-eth0_g0_0-21swapper/110:14:081
121750390irq/30-eth0_g0_0-21swapper/109:15:291
121650390irq/29-eth0_g0_31487-21head07:40:120
121650390irq/29-eth0_g0_2029-21runrttasks12:26:330
121650390irq/29-eth0_g0_131kworker/0:111:04:500
121650390irq/29-eth0_g0_13-21kworker/0:110:05:440
121650390irq/29-eth0_g0_13-21kworker/0:109:42:510
121390ksoftirqd/1121650irq/29-eth0_g0_09:08:281
121390ksoftirqd/1121650irq/29-eth0_g0_08:25:261
121390ksoftirqd/1121650irq/29-eth0_g0_08:12:091
121390ksoftirqd/1121650irq/29-eth0_g0_08:05:451
2336999381cyclictest7542-21sort08:15:111
2336999381cyclictest29965-21taskset12:00:091
2336999381cyclictest29490-21latency_hist07:34:491
2336999381cyclictest28033-21cat09:40:041
2336999381cyclictest11792-21sort08:34:501
121650380irq/29-eth0_g0_31ksoftirqd/012:01:330
121650380irq/29-eth0_g0_31ksoftirqd/011:39:000
121650380irq/29-eth0_g0_2336899cyclictest11:54:410
121650380irq/29-eth0_g0_2336899cyclictest11:54:410
121650380irq/29-eth0_g0_2029-21runrttasks12:31:180
121650380irq/29-eth0_g0_13331-21load08:40:040
121650380irq/29-eth0_g0_13-21kworker/0:109:37:290
121650380irq/29-eth0_g0_13-21kworker/0:109:25:140
121380ksoftirqd/1121750irq/30-eth0_g0_12:38:100
121380ksoftirqd/1121650irq/29-eth0_g0_12:05:311
121380ksoftirqd/1121650irq/29-eth0_g0_11:49:511
121380ksoftirqd/1121650irq/29-eth0_g0_11:49:511
121380ksoftirqd/1121650irq/29-eth0_g0_11:27:091
2336999371cyclictest144422sleep108:45:021
121750370irq/30-eth0_g0_470-21kworker/1:111:42:321
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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