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2026-09-12 - 01:19

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 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3078821590sleep0121750irq/30-eth0_g0_09:06:160
1476821170sleep1121650irq/29-eth0_g0_12:29:111
284822980sleep0121750irq/30-eth0_g0_11:10:530
284822980sleep0121750irq/30-eth0_g0_11:10:530
265482840sleep0121750irq/30-eth0_g0_11:04:160
121810ksoftirqd/1121750irq/30-eth0_g0_11:40:531
121690ksoftirqd/1121650irq/29-eth0_g0_10:09:461
301072680sleep0121650irq/29-eth0_g0_11:18:210
135942630sleep1121750irq/30-eth0_g0_07:55:511
242192580sleep0121650irq/29-eth0_g0_10:55:220
121550ksoftirqd/1121750irq/30-eth0_g0_11:34:271
276052540sleep0121750irq/30-eth0_g0_11:07:210
156592520sleep0121750irq/30-eth0_g0_10:19:310
97782510sleep0121750irq/30-eth0_g0_12:07:310
121510ksoftirqd/1121750irq/30-eth0_g0_11:00:121
121490ksoftirqd/1121750irq/30-eth0_g0_09:32:070
121470ksoftirqd/1121750irq/30-eth0_g0_11:52:491
121470ksoftirqd/1121750irq/30-eth0_g0_11:43:500
121470ksoftirqd/1121750irq/30-eth0_g0_10:37:571
121470ksoftirqd/1121650irq/29-eth0_g0_10:24:110
121650460irq/29-eth0_g0_31ksoftirqd/009:35:510
121460ksoftirqd/1121750irq/30-eth0_g0_12:13:511
121650450irq/29-eth0_g0_13-21kworker/0:111:47:190
121450ksoftirqd/1121650irq/29-eth0_g0_10:03:081
121750440irq/30-eth0_g0_1219-21kworker/1:210:11:501
121440ksoftirqd/1121750irq/30-eth0_g0_10:16:461
121750430irq/30-eth0_g0_11814-21seq07:50:091
121650430irq/29-eth0_g0_6428-21sshd07:25:560
121650430irq/29-eth0_g0_13-21kworker/0:111:40:040
121650430irq/29-eth0_g0_13-21kworker/0:109:26:100
121650430irq/29-eth0_g0_1219-21kworker/1:211:36:271
121430ksoftirqd/1121750irq/30-eth0_g0_09:53:121
94282420sleep0121650irq/29-eth0_g0_09:52:370
121750420irq/30-eth0_g0_123642sleep112:19:241
121750420irq/30-eth0_g0_1219-21kworker/1:212:33:001
121650420irq/29-eth0_g0_31ksoftirqd/010:28:360
121650420irq/29-eth0_g0_13-21kworker/0:112:34:300
121650420irq/29-eth0_g0_12478-21latency_hist12:20:330
121650420irq/29-eth0_g0_0-21swapper/008:05:550
121420ksoftirqd/1121650irq/29-eth0_g0_09:33:151
121750410irq/30-eth0_g0_9156-21irqstats12:05:531
121750410irq/30-eth0_g0_1219-21kworker/1:212:02:311
121750410irq/30-eth0_g0_121ksoftirqd/111:20:461
121750410irq/30-eth0_g0_121ksoftirqd/109:17:311
121650410irq/29-eth0_g0_31ksoftirqd/010:06:000
121650410irq/29-eth0_g0_31ksoftirqd/008:40:500
121650410irq/29-eth0_g0_121ksoftirqd/111:59:241
121410ksoftirqd/1121650irq/29-eth0_g0_09:20:470
92699402cyclictest12579-21grep07:50:571
92699401cyclictest4743-21sed11:45:561
324652400sleep1121650irq/29-eth0_g0_11:27:311
121650400irq/29-eth0_g0_31ksoftirqd/008:19:380
121650400irq/29-eth0_g0_13-21kworker/0:112:03:160
121650400irq/29-eth0_g0_13-21kworker/0:111:33:530
121650400irq/29-eth0_g0_13-21kworker/0:109:46:190
121650400irq/29-eth0_g0_0-21swapper/007:00:460
121400ksoftirqd/1121750irq/30-eth0_g0_10:46:360
92699392cyclictest27415-21sed11:05:561
92699391cyclictest29934-21diskmemload09:55:511
92699391cyclictest21387-21grep10:40:561
121750390irq/30-eth0_g0_121ksoftirqd/111:02:041
121750390irq/30-eth0_g0_121ksoftirqd/109:29:581
121650390irq/29-eth0_g0_13-21kworker/0:111:26:160
121650390irq/29-eth0_g0_13-21kworker/0:111:24:350
121650390irq/29-eth0_g0_13-21kworker/0:110:10:550
121650390irq/29-eth0_g0_13-21kworker/0:109:44:360
121650390irq/29-eth0_g0_121ksoftirqd/112:30:310
121650390irq/29-eth0_g0_0-21swapper/011:50:520
92699380cyclictest0-21swapper/108:18:571
121750380irq/30-eth0_g0_1219-21kworker/1:211:15:431
121750380irq/30-eth0_g0_1219-21kworker/1:210:50:461
121750380irq/30-eth0_g0_1219-21kworker/1:210:30:511
121750380irq/30-eth0_g0_1219-21kworker/1:209:06:531
121750380irq/30-eth0_g0_121ksoftirqd/109:50:091
121750380irq/30-eth0_g0_121ksoftirqd/109:42:241
121750380irq/30-eth0_g0_121ksoftirqd/109:37:541
121750380irq/30-eth0_g0_0-21swapper/109:20:501
121650380irq/29-eth0_g0_32452-21/usr/sbin/munin09:15:480
121650380irq/29-eth0_g0_31240-21taskset09:10:441
121650380irq/29-eth0_g0_31240-21taskset09:10:441
121650380irq/29-eth0_g0_31ksoftirqd/012:20:480
121650380irq/29-eth0_g0_31ksoftirqd/009:56:470
121650380irq/29-eth0_g0_31ksoftirqd/008:10:550
121650380irq/29-eth0_g0_13-21kworker/0:110:42:370
121650380irq/29-eth0_g0_13-21kworker/0:110:32:470
121650380irq/29-eth0_g0_13-21kworker/0:110:04:210
121650380irq/29-eth0_g0_13-21kworker/0:109:11:490
121650380irq/29-eth0_g0_13-21kworker/0:109:11:490
92699372cyclictest7234-21taskset07:30:481
92699371cyclictest19496-21sed08:20:501
92699371cyclictest16178-21sort08:05:571
121750370irq/30-eth0_g0_32616-21ntpdc07:00:511
121750370irq/30-eth0_g0_1219-21kworker/1:211:10:411
121750370irq/30-eth0_g0_1219-21kworker/1:211:10:411
121750370irq/30-eth0_g0_121ksoftirqd/110:29:511
121650370irq/29-eth0_g0_8929-21sed07:35:550
121650370irq/29-eth0_g0_24329-21/usr/sbin/munin10:55:520
121650370irq/29-eth0_g0_13-21kworker/0:111:56:050
121650370irq/29-eth0_g0_13-21kworker/0:110:36:290
92699365cyclictest0-21swapper/110:45:511
926993622cyclictest23155-21netstat08:35:511
926993622cyclictest23155-21netstat08:35:511
92699362cyclictest21518-21grep08:30:341
92699362cyclictest1964-21runrttasks10:24:451
92699362cyclictest13114-21awk12:20:541
92699361cyclictest8947-21sed07:35:551
92699361cyclictest28952-21df09:00:461
92699361cyclictest27553-21wc08:55:341
92699361cyclictest0-21swapper/109:00:321
121650360irq/29-eth0_g0_29969-21cat09:05:360
121650360irq/29-eth0_g0_27035-21unixbench_multi08:50:540
121650360irq/29-eth0_g0_1964-21runrttasks08:35:420
121650360irq/29-eth0_g0_1964-21runrttasks08:35:420
121650360irq/29-eth0_g0_1964-21runrttasks07:54:040
92699351cyclictest4672-21/usr/sbin/munin07:20:451
92699351cyclictest4672-21/usr/sbin/munin07:20:451
92699351cyclictest21732sleep107:10:341
92699351cyclictest14694-21wc08:00:511
121750350irq/30-eth0_g0_25321-21df08:45:451
121650350irq/29-eth0_g0_92499cyclictest07:45:540
121650350irq/29-eth0_g0_4102-21sed07:15:550
121650350irq/29-eth0_g0_20904-21chrt08:25:540
121650350irq/29-eth0_g0_19877-21unixbench_singl08:20:570
121650350irq/29-eth0_g0_14762-21ntp_offset08:00:540
121650350irq/29-eth0_g0_0-21swapper/012:14:490
92699341cyclictest21578-21/usr/sbin/munin08:30:471
92699341cyclictest17383-21seq08:10:551
121650340irq/29-eth0_g0_4991-21cat07:20:500
121650340irq/29-eth0_g0_4991-21cat07:20:500
121650340irq/29-eth0_g0_27674-21df08:55:460
121650340irq/29-eth0_g0_25836-21grep08:45:540
121650340irq/29-eth0_g0_13425-21ls07:55:470
92699331cyclictest2822-21awk07:10:531
92699331cyclictest0-21swapper/107:25:561
121650330irq/29-eth0_g0_9806-21cat07:40:480
121650330irq/29-eth0_g0_7552-21proc_pri07:30:550
121650330irq/29-eth0_g0_2663-21ntp_states07:10:500
121650330irq/29-eth0_g0_21810-21iostat08:30:490
121650330irq/29-eth0_g0_1207-21if_err_eth007:05:470
92699322cyclictest0-21swapper/108:40:441
92699311cyclictest0-21swapper/107:18:471
121750300irq/30-eth0_g0_0-21swapper/107:40:461
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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