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2026-06-24 - 11:27

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 792 highest latencies:
System rack3slot5s.osadl.org (updated Wed Jun 24, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
263821410sleep1121650irq/29-eth0_g0_00:02:561
377221360sleep1121650irq/29-eth0_g0_00:06:511
637121240sleep0121650irq/29-eth0_g0_00:18:340
121890ksoftirqd/1121750irq/30-eth0_g0_21:36:581
121850ksoftirqd/1121750irq/30-eth0_g0_22:48:451
25862810sleep0121650irq/29-eth0_g0_00:02:170
299142720sleep1121750irq/30-eth0_g0_21:28:451
121670ksoftirqd/1121750irq/30-eth0_g0_23:53:551
105632630sleep0121750irq/30-eth0_g0_22:23:330
121620ksoftirqd/1121750irq/30-eth0_g0_21:09:121
121620ksoftirqd/1121750irq/30-eth0_g0_19:59:141
38032600sleep0121650irq/29-eth0_g0_00:07:110
121570ksoftirqd/1121750irq/30-eth0_g0_19:42:311
121570ksoftirqd/1121750irq/30-eth0_g0_19:42:311
121560ksoftirqd/1121750irq/30-eth0_g0_23:48:581
121560ksoftirqd/1121750irq/30-eth0_g0_21:16:501
121560ksoftirqd/1121750irq/30-eth0_g0_20:04:501
274892550sleep1121750irq/30-eth0_g0_23:30:351
121510ksoftirqd/1121750irq/30-eth0_g0_22:01:511
121490ksoftirqd/1121750irq/30-eth0_g0_22:13:421
121650480irq/29-eth0_g0_2888-21unixbench_multi19:34:060
121650480irq/29-eth0_g0_2888-21unixbench_multi19:34:060
121470ksoftirqd/1121750irq/30-eth0_g0_23:43:440
28441994634cyclictest19638-21grep20:44:061
28441994533cyclictest13997-21taskset20:23:461
28441994531cyclictest9207-21latency00:29:001
121450ksoftirqd/1121750irq/30-eth0_g0_23:33:450
121450ksoftirqd/1121750irq/30-eth0_g0_23:14:340
121450ksoftirqd/1121750irq/30-eth0_g0_23:02:531
28441994432cyclictest21119-21grep23:04:061
121650440irq/29-eth0_g0_121ksoftirqd/119:04:001
121650440irq/29-eth0_g0_121ksoftirqd/100:21:441
121750430irq/30-eth0_g0_1219-21kworker/1:222:34:261
121750430irq/30-eth0_g0_1219-21kworker/1:222:06:421
121750430irq/30-eth0_g0_1219-21kworker/1:200:09:391
121650430irq/29-eth0_g0_1964-21runrttasks21:58:380
121650430irq/29-eth0_g0_13-21kworker/0:122:06:290
121650430irq/29-eth0_g0_13-21kworker/0:121:46:580
121650430irq/29-eth0_g0_13-21kworker/0:100:23:030
121430ksoftirqd/1121650irq/29-eth0_g0_23:09:471
121430ksoftirqd/1121650irq/29-eth0_g0_21:53:341
28441994230cyclictest0-21swapper/123:38:591
121750420irq/30-eth0_g0_28777-21latency19:08:591
121750420irq/30-eth0_g0_121ksoftirqd/123:14:371
121650420irq/29-eth0_g0_9796-21seq00:30:340
121650420irq/29-eth0_g0_1964-21runrttasks19:07:470
121750410irq/30-eth0_g0_1219-21kworker/1:223:20:461
121750410irq/30-eth0_g0_1219-21kworker/1:222:28:331
121750410irq/30-eth0_g0_121ksoftirqd/122:51:421
121650410irq/29-eth0_g0_31ksoftirqd/021:39:030
121650410irq/29-eth0_g0_13-21kworker/0:123:11:500
121650410irq/29-eth0_g0_13-21kworker/0:100:12:020
121410ksoftirqd/1121650irq/29-eth0_g0_00:24:021
28441994035cyclictest30198-21sshd19:14:031
121750400irq/30-eth0_g0_1219-21kworker/1:223:27:421
121750400irq/30-eth0_g0_1219-21kworker/1:222:29:041
121750400irq/30-eth0_g0_1219-21kworker/1:221:58:451
121750400irq/30-eth0_g0_1219-21kworker/1:200:16:061
121750400irq/30-eth0_g0_121ksoftirqd/122:39:091
121650400irq/29-eth0_g0_30732-21/usr/sbin/munin23:44:040
121650400irq/29-eth0_g0_26110-21uptime23:24:070
121650400irq/29-eth0_g0_13-21kworker/0:123:37:020
121650400irq/29-eth0_g0_13-21kworker/0:121:33:140
121650400irq/29-eth0_g0_13-21kworker/0:100:38:310
121650400irq/29-eth0_g0_121ksoftirqd/121:59:540
121650400irq/29-eth0_g0_0-21swapper/020:33:560
28441993934cyclictest18367-21unixbench_multi20:39:091
28441993934cyclictest1326-21missed_timers19:29:001
28441993933cyclictest1973-21chrt21:44:071
121750390irq/30-eth0_g0_1219-21kworker/1:223:45:461
121750390irq/30-eth0_g0_1219-21kworker/1:200:34:141
121750390irq/30-eth0_g0_121ksoftirqd/121:42:511
121650390irq/29-eth0_g0_8431-21if_eth022:13:580
121650390irq/29-eth0_g0_31ksoftirqd/022:32:590
121650390irq/29-eth0_g0_254882ntpq21:09:040
121650390irq/29-eth0_g0_18352-21missed_timers22:54:000
121650390irq/29-eth0_g0_13-21kworker/0:121:37:540
121390ksoftirqd/1121650irq/29-eth0_g0_22:10:170
121390ksoftirqd/1121650irq/29-eth0_g0_21:25:380
121390ksoftirqd/1121650irq/29-eth0_g0_20:50:461
28441993833cyclictest28554-21unixbench_singl23:34:051
28441993832cyclictest22029-21grep20:54:071
121750380irq/30-eth0_g0_1219-21kworker/1:221:18:551
121750380irq/30-eth0_g0_121ksoftirqd/122:56:451
121650380irq/29-eth0_g0_37132sleep019:38:590
121650380irq/29-eth0_g0_37132sleep019:38:590
121650380irq/29-eth0_g0_19327-21df_abs22:58:550
121650380irq/29-eth0_g0_13-21kworker/0:123:50:210
121650380irq/29-eth0_g0_13-21kworker/0:123:19:370
121650380irq/29-eth0_g0_13-21kworker/0:122:48:570
121650380irq/29-eth0_g0_13-21kworker/0:122:46:070
121650380irq/29-eth0_g0_13-21kworker/0:122:34:070
121650380irq/29-eth0_g0_13-21kworker/0:121:19:140
121650380irq/29-eth0_g0_13-21kworker/0:121:18:240
121650380irq/29-eth0_g0_13-21kworker/0:100:27:420
121650380irq/29-eth0_g0_0-21swapper/021:48:580
28441993732cyclictest9879-21open_inodes22:19:031
28441993732cyclictest8920-21unixbench_singl22:14:141
28441993732cyclictest4955-21chrt19:43:591
28441993732cyclictest4955-21chrt19:43:591
28441993732cyclictest15377-21taskset20:28:581
28441993732cyclictest15377-21taskset20:28:581
121650370irq/29-eth0_g0_1964-21runrttasks21:05:580
121650370irq/29-eth0_g0_1964-21runrttasks20:13:500
121650370irq/29-eth0_g0_13-21kworker/0:123:05:110
121650370irq/29-eth0_g0_13-21kworker/0:122:40:170
121650370irq/29-eth0_g0_11060-21ntpdc22:24:040
121650370irq/29-eth0_g0_0-21swapper/020:39:180
28441993631cyclictest24014-21df_inode21:03:571
28441993631cyclictest17019-21taskset20:34:051
28441993631cyclictest14669-21unixbench_multi20:24:101
28441993630cyclictest2524-21sort19:34:001
28441993630cyclictest2524-21sort19:34:001
121750360irq/30-eth0_g0_1219-21kworker/1:221:28:571
121650360irq/29-eth0_g0_322-21timerandwakeup19:24:070
121650360irq/29-eth0_g0_31246-21latency19:18:590
121650360irq/29-eth0_g0_29248-21uptime19:09:060
121650360irq/29-eth0_g0_23282-21unixbench_multi20:59:050
121650360irq/29-eth0_g0_1964-21runrttasks20:18:490
121650360irq/29-eth0_g0_14702-21unixbench_multi20:24:100
121650360irq/29-eth0_g0_13-21kworker/0:123:56:020
121650360irq/29-eth0_g0_13-21kworker/0:120:04:060
121360ksoftirqd/1121650irq/29-eth0_g0_20:13:231
28441993528cyclictest12695-21unixbench_multi20:14:031
121650350irq/29-eth0_g0_8793-21ntp_offset19:59:090
121650350irq/29-eth0_g0_6163-21iostat19:48:580
121650350irq/29-eth0_g0_30450-21unixbench_singl19:14:060
121650350irq/29-eth0_g0_22040-21unixbench_multi20:54:070
121650350irq/29-eth0_g0_1964-21runrttasks20:53:330
121650350irq/29-eth0_g0_11530-21unixbench_singl20:09:070
28441993430cyclictest6142-21if_eth019:48:571
2844199341cyclictest427-21unixbench_singl19:24:071
121650340irq/29-eth0_g0_7536-21chrt19:54:000
121650340irq/29-eth0_g0_4958-21sort19:43:590
121650340irq/29-eth0_g0_4958-21sort19:43:590
121650340irq/29-eth0_g0_1964-21runrttasks20:47:210
121650340irq/29-eth0_g0_15907-21tail20:29:070
121650340irq/29-eth0_g0_15907-21tail20:29:070
28441993321cyclictest0-21swapper/119:19:011
121650330irq/29-eth0_g0_1379-21awk19:29:000
28441993227cyclictest23330-21unixbench_singl20:59:061
2844199322cyclictest7160-21/usr/sbin/munin19:54:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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