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2026-08-15 - 20:34

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 15, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111921490sleep1121650irq/29-eth0_g0_12:23:281
3247921230sleep1121650irq/29-eth0_g0_12:20:051
1395421200sleep0121650irq/29-eth0_g0_11:03:110
3201121050sleep0121750irq/30-eth0_g0_10:06:380
163242990sleep1121650irq/29-eth0_g0_11:12:181
212812830chrt121650irq/29-eth0_g0_11:33:001
121650ksoftirqd/1121750irq/30-eth0_g0_09:47:080
121520ksoftirqd/1121650irq/29-eth0_g0_10:16:381
121510ksoftirqd/1121750irq/30-eth0_g0_11:42:421
121480ksoftirqd/1121750irq/30-eth0_g0_10:45:481
121650460irq/29-eth0_g0_21666-21latency_hist07:11:390
121450ksoftirqd/1121750irq/30-eth0_g0_07:36:570
121450ksoftirqd/1121650irq/29-eth0_g0_07:51:281
5212440sleep0121750irq/30-eth0_g0_10:08:540
121750440irq/30-eth0_g0_1219-21kworker/1:210:29:431
121750440irq/30-eth0_g0_121ksoftirqd/110:33:531
121650440irq/29-eth0_g0_31ksoftirqd/011:13:050
121650440irq/29-eth0_g0_13-21kworker/0:111:24:110
121440ksoftirqd/1132492sleep008:47:080
121440ksoftirqd/1121750irq/30-eth0_g0_11:49:061
121440ksoftirqd/1121650irq/29-eth0_g0_12:31:261
121440ksoftirqd/1121650irq/29-eth0_g0_09:35:471
121440ksoftirqd/1121650irq/29-eth0_g0_09:35:471
121440ksoftirqd/1121650irq/29-eth0_g0_08:32:151
121440ksoftirqd/1121650irq/29-eth0_g0_07:42:301
121440ksoftirqd/1121650irq/29-eth0_g0_07:42:301
121750430irq/30-eth0_g0_1219-21kworker/1:211:51:531
121430ksoftirqd/1121650irq/29-eth0_g0_09:58:351
121430ksoftirqd/1121650irq/29-eth0_g0_09:39:101
250792420chrt121650irq/29-eth0_g0_11:49:290
121750420irq/30-eth0_g0_1219-21kworker/1:209:10:081
121750420irq/30-eth0_g0_121ksoftirqd/109:56:061
121650420irq/29-eth0_g0_31ksoftirqd/011:08:400
121650420irq/29-eth0_g0_13-21kworker/0:111:56:390
121650420irq/29-eth0_g0_13-21kworker/0:110:40:200
121420ksoftirqd/1121650irq/29-eth0_g0_12:10:421
121420ksoftirqd/1121650irq/29-eth0_g0_08:03:071
2041199411cyclictest31559-21grep10:02:001
121750410irq/30-eth0_g0_121ksoftirqd/109:19:331
121650410irq/29-eth0_g0_31ksoftirqd/009:01:520
121650410irq/29-eth0_g0_13-21kworker/0:111:44:500
121650410irq/29-eth0_g0_13-21kworker/0:110:56:510
121650410irq/29-eth0_g0_13-21kworker/0:109:40:320
121410ksoftirqd/1121650irq/29-eth0_g0_10:49:291
121410ksoftirqd/1121650irq/29-eth0_g0_08:47:001
2041199401cyclictest3986-21grep10:21:591
121750400irq/30-eth0_g0_1219-21kworker/1:212:02:431
121750400irq/30-eth0_g0_1219-21kworker/1:211:20:361
121750400irq/30-eth0_g0_1219-21kworker/1:209:49:491
121750400irq/30-eth0_g0_1219-21kworker/1:209:13:061
121750400irq/30-eth0_g0_121ksoftirqd/111:22:331
121750400irq/30-eth0_g0_121ksoftirqd/111:01:571
121650400irq/29-eth0_g0_32703-21/usr/sbin/munin12:21:480
121650400irq/29-eth0_g0_19390-21df_abs07:01:490
121650400irq/29-eth0_g0_13-21kworker/0:112:06:340
121650400irq/29-eth0_g0_13-21kworker/0:111:30:040
121650400irq/29-eth0_g0_13-21kworker/0:110:46:450
121650400irq/29-eth0_g0_13-21kworker/0:110:33:360
121650400irq/29-eth0_g0_13-21kworker/0:110:23:400
121650400irq/29-eth0_g0_13-21kworker/0:109:44:160
121650400irq/29-eth0_g0_13-21kworker/0:109:21:480
121400ksoftirqd/1121650irq/29-eth0_g0_08:56:481
121400ksoftirqd/1121650irq/29-eth0_g0_07:21:221
2041199391cyclictest26615-21unixbench_multi09:41:591
2041199391cyclictest19606-21netstat11:26:551
2041199391cyclictest14743-21sh11:06:561
121750390irq/30-eth0_g0_31ksoftirqd/011:36:550
121750390irq/30-eth0_g0_1219-21kworker/1:211:01:071
121750390irq/30-eth0_g0_1219-21kworker/1:210:38:421
121750390irq/30-eth0_g0_121ksoftirqd/109:28:271
121750390irq/30-eth0_g0_0-21swapper/111:37:551
121750390irq/30-eth0_g0_0-21swapper/110:07:051
121650390irq/29-eth0_g0_30069-21pluginstate09:56:590
121650390irq/29-eth0_g0_31ksoftirqd/012:11:550
121650390irq/29-eth0_g0_15498-21awk08:56:570
121650390irq/29-eth0_g0_13-21kworker/0:112:26:520
121650390irq/29-eth0_g0_13-21kworker/0:111:56:290
121650390irq/29-eth0_g0_13-21kworker/0:111:32:030
121650390irq/29-eth0_g0_13-21kworker/0:110:54:240
121650390irq/29-eth0_g0_13-21kworker/0:110:16:470
121650390irq/29-eth0_g0_13-21kworker/0:109:15:090
121650390irq/29-eth0_g0_0-21swapper/012:06:540
2041199382cyclictest28077-21irqstats07:36:521
2041199382cyclictest25450-21df07:26:491
2041199381cyclictest22428-21unixbench_singl07:12:001
2041199381cyclictest13902-21runrttasks08:51:521
121750380irq/30-eth0_g0_31ksoftirqd/009:31:570
121750380irq/30-eth0_g0_31ksoftirqd/009:31:570
121750380irq/30-eth0_g0_19500-21irqstats07:01:511
121750380irq/30-eth0_g0_1219-21kworker/1:211:57:581
121750380irq/30-eth0_g0_1219-21kworker/1:210:52:271
121650380irq/29-eth0_g0_9181-21cat08:31:540
121650380irq/29-eth0_g0_27248-21unixbench_multi07:31:590
121650380irq/29-eth0_g0_13-21kworker/0:112:34:530
121650380irq/29-eth0_g0_13-21kworker/0:111:21:250
121650380irq/29-eth0_g0_13-21kworker/0:110:45:400
121650380irq/29-eth0_g0_13-21kworker/0:110:28:500
121650380irq/29-eth0_g0_13-21kworker/0:109:27:260
121650380irq/29-eth0_g0_1152-21memory10:11:530
121380ksoftirqd/1121650irq/29-eth0_g0_08:46:291
2041199372cyclictest5426-21iostat08:16:531
2041199371cyclictest30800-21sendmail_mailst12:11:581
2041199371cyclictest22249-21grep09:26:391
2041199371cyclictest10365-21memory08:36:541
121750370irq/30-eth0_g0_1219-21kworker/1:210:21:181
121650370irq/29-eth0_g0_4802-21sshd08:13:060
121650370irq/29-eth0_g0_1964-21runrttasks07:48:190
121650370irq/29-eth0_g0_13-21kworker/0:112:20:180
121650370irq/29-eth0_g0_13-21kworker/0:109:54:000
2041199361cyclictest4510-21sendmail_mailqu08:11:581
2041199361cyclictest27146-21rt-features07:31:571
2041199361cyclictest24728-21sendmail_mailtr07:21:591
2041199361cyclictest21144-21unixbench_multi07:06:591
2041199361cyclictest17298-21cat09:06:381
121650360irq/29-eth0_g0_23247-21/usr/sbin/munin07:16:540
121650360irq/29-eth0_g0_2176-21unixbench_multi08:02:000
121650360irq/29-eth0_g0_1964-21runrttasks09:18:320
121650360irq/29-eth0_g0_1964-21runrttasks08:56:230
121650360irq/29-eth0_g0_17968-21timerandwakeup09:07:000
121650360irq/29-eth0_g0_0-21swapper/008:16:570
121650360irq/29-eth0_g0_0-21swapper/007:51:510
2041199351cyclictest0-21swapper/112:31:561
2041199351cyclictest0-21swapper/107:52:441
121650350irq/29-eth0_g0_3304-21awk08:06:580
121650350irq/29-eth0_g0_24404-21taskset07:21:520
121650350irq/29-eth0_g0_10366-21seq08:36:540
121350ksoftirqd/1121750irq/30-eth0_g0_08:24:000
2041199342cyclictest7104-21grep08:22:001
2041199341cyclictest8317-21unixbench_singl08:27:001
121650340irq/29-eth0_g0_7874-21irqstats08:26:520
121650340irq/29-eth0_g0_608-21netstat07:56:540
121650340irq/29-eth0_g0_29749-21grep07:42:000
121650340irq/29-eth0_g0_29749-21grep07:42:000
121650340irq/29-eth0_g0_26526-21munin-run07:31:380
121650340irq/29-eth0_g0_21730-21cpu07:11:490
121650340irq/29-eth0_g0_1964-21runrttasks08:42:380
2041199331cyclictest3443-21grep08:06:591
121650320irq/29-eth0_g0_0-21swapper/107:56:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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