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2026-07-12 - 21:45

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 Sun Jul 12, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
859121640sleep0121650irq/29-eth0_g0_09:35:150
3211521070sleep1121750irq/30-eth0_g0_08:58:221
121960ksoftirqd/1121750irq/30-eth0_g0_09:52:191
121900ksoftirqd/1121650irq/29-eth0_g0_12:28:280
121770ksoftirqd/1121750irq/30-eth0_g0_10:10:191
79242680sleep1121750irq/30-eth0_g0_11:43:521
121670ksoftirqd/1121750irq/30-eth0_g0_09:47:151
70282620sleep0121750irq/30-eth0_g0_11:42:440
121610ksoftirqd/1121750irq/30-eth0_g0_09:44:550
121722560sleep0121750irq/30-eth0_g0_07:38:150
121722560sleep0121750irq/30-eth0_g0_07:38:150
134272530sleep0121750irq/30-eth0_g0_09:54:320
121520ksoftirqd/1121750irq/30-eth0_g0_09:20:421
121510ksoftirqd/1121750irq/30-eth0_g0_07:31:161
71322500sleep0121650irq/29-eth0_g0_09:28:220
298822500sleep0121750irq/30-eth0_g0_11:03:110
121480ksoftirqd/1121750irq/30-eth0_g0_11:30:511
121470ksoftirqd/1121650irq/29-eth0_g0_08:33:141
121460ksoftirqd/1121750irq/30-eth0_g0_12:11:341
121650440irq/29-eth0_g0_32254-21vmstat08:58:230
121440ksoftirqd/1121750irq/30-eth0_g0_12:19:091
121440ksoftirqd/1121650irq/29-eth0_g0_10:22:421
121440ksoftirqd/1121650irq/29-eth0_g0_09:40:511
121750430irq/30-eth0_g0_121ksoftirqd/111:03:191
121650430irq/29-eth0_g0_13-21kworker/0:110:34:320
121650430irq/29-eth0_g0_13-21kworker/0:110:22:520
121430ksoftirqd/1121750irq/30-eth0_g0_11:44:420
121750420irq/30-eth0_g0_31ksoftirqd/008:03:200
121420ksoftirqd/1121750irq/30-eth0_g0_11:09:590
121420ksoftirqd/1121650irq/29-eth0_g0_11:48:190
121420ksoftirqd/1121650irq/29-eth0_g0_10:49:081
121420ksoftirqd/1121650irq/29-eth0_g0_10:46:151
121420ksoftirqd/1121650irq/29-eth0_g0_09:17:410
121750410irq/30-eth0_g0_4523-21cat07:08:001
121750410irq/30-eth0_g0_28636-21df_abs10:58:121
121750410irq/30-eth0_g0_1219-21kworker/1:210:54:451
121750410irq/30-eth0_g0_1219-21kworker/1:209:13:471
121650410irq/29-eth0_g0_4461-21latencyplot07:07:590
121650410irq/29-eth0_g0_16284-21mailstats12:18:200
121650410irq/29-eth0_g0_13-21kworker/0:112:03:070
121650410irq/29-eth0_g0_13-21kworker/0:111:25:060
121650410irq/29-eth0_g0_13-21kworker/0:111:25:060
121650410irq/29-eth0_g0_13-21kworker/0:111:19:500
121650410irq/29-eth0_g0_13-21kworker/0:110:58:120
121650410irq/29-eth0_g0_13-21kworker/0:109:20:010
446699401cyclictest13881-21chrt09:58:121
121750400irq/30-eth0_g0_1219-21kworker/1:211:22:011
121750400irq/30-eth0_g0_1219-21kworker/1:210:23:281
121750400irq/30-eth0_g0_121ksoftirqd/109:54:551
121650400irq/29-eth0_g0_27840-21find10:53:200
121650400irq/29-eth0_g0_13-21kworker/0:112:33:120
121650400irq/29-eth0_g0_13-21kworker/0:112:23:450
121650400irq/29-eth0_g0_13-21kworker/0:111:56:400
121650400irq/29-eth0_g0_13-21kworker/0:111:28:520
121650400irq/29-eth0_g0_13-21kworker/0:110:48:240
121650400irq/29-eth0_g0_13-21kworker/0:110:44:470
121650400irq/29-eth0_g0_13-21kworker/0:110:38:290
121650400irq/29-eth0_g0_13-21kworker/0:110:32:280
121650400irq/29-eth0_g0_13-21kworker/0:110:06:400
121650400irq/29-eth0_g0_13-21kworker/0:109:48:040
121650400irq/29-eth0_g0_0-21swapper/011:34:500
121400ksoftirqd/1121650irq/29-eth0_g0_07:58:521
446699392cyclictest1696-21df_inode09:08:111
446699391cyclictest18177-21sed10:13:221
446699391cyclictest14271-21chrt07:47:591
26012390chrt121750irq/30-eth0_g0_11:23:141
26012390chrt121750irq/30-eth0_g0_11:23:141
121750390irq/30-eth0_g0_1219-21kworker/1:209:23:151
121750390irq/30-eth0_g0_121ksoftirqd/111:15:371
121750390irq/30-eth0_g0_121ksoftirqd/111:08:571
121650390irq/29-eth0_g0_31ksoftirqd/009:23:540
121650390irq/29-eth0_g0_31ksoftirqd/008:43:150
121650390irq/29-eth0_g0_13820-21/usr/sbin/munin09:58:230
121650390irq/29-eth0_g0_13-21kworker/0:112:14:310
121650390irq/29-eth0_g0_13-21kworker/0:110:24:110
121650390irq/29-eth0_g0_13-21kworker/0:110:09:450
121390ksoftirqd/1121650irq/29-eth0_g0_12:29:281
121390ksoftirqd/1121650irq/29-eth0_g0_08:54:361
121390ksoftirqd/1121650irq/29-eth0_g0_08:40:201
121390ksoftirqd/1121650irq/29-eth0_g0_08:09:051
121390ksoftirqd/1121650irq/29-eth0_g0_07:35:091
446699382cyclictest18209-21forks08:03:121
121750380irq/30-eth0_g0_121ksoftirqd/112:35:241
121750380irq/30-eth0_g0_121ksoftirqd/112:07:081
121750380irq/30-eth0_g0_121ksoftirqd/110:06:181
121750380irq/30-eth0_g0_11245-21seq11:58:181
121750380irq/30-eth0_g0_0-21swapper/112:24:201
121650380irq/29-eth0_g0_31ksoftirqd/008:13:110
121650380irq/29-eth0_g0_1964-21runrttasks07:52:490
121650380irq/29-eth0_g0_13-21kworker/0:112:00:490
121650380irq/29-eth0_g0_13-21kworker/0:111:13:260
121650380irq/29-eth0_g0_13-21kworker/0:110:13:470
121650380irq/29-eth0_g0_13-21kworker/0:109:42:210
121650380irq/29-eth0_g0_13-21kworker/0:109:10:020
121650380irq/29-eth0_g0_121ksoftirqd/112:18:001
121380ksoftirqd/1121650irq/29-eth0_g0_09:30:091
121380ksoftirqd/1121650irq/29-eth0_g0_08:14:221
121380ksoftirqd/1121650irq/29-eth0_g0_07:40:481
121380ksoftirqd/1121650irq/29-eth0_g0_07:40:481
446699371cyclictest59562sleep107:13:121
446699371cyclictest1964-21runrttasks08:31:201
446699371cyclictest16777-21cat07:58:001
446699371cyclictest0-21swapper/110:41:331
121750370irq/30-eth0_g0_1964-21runrttasks12:10:280
121750370irq/30-eth0_g0_1219-21kworker/1:210:34:061
121750370irq/30-eth0_g0_121ksoftirqd/111:38:151
121750370irq/30-eth0_g0_121ksoftirqd/109:33:421
121650370irq/29-eth0_g0_1964-21runrttasks08:02:120
121650370irq/29-eth0_g0_121ksoftirqd/111:57:061
121650370irq/29-eth0_g0_10151-21unixbench_singl07:28:220
121370ksoftirqd/1121650irq/29-eth0_g0_11:33:421
446699362cyclictest8474-21irqstats07:23:131
446699361cyclictest28447-21ls08:43:201
121650360irq/29-eth0_g0_8899-21unixbench_multi07:23:210
121650360irq/29-eth0_g0_30816-21chrt08:53:200
121650360irq/29-eth0_g0_27288-21unixbench_singl08:38:210
121650360irq/29-eth0_g0_23189-21latency08:23:150
121650360irq/29-eth0_g0_1964-21runrttasks07:36:530
121650360irq/29-eth0_g0_15836-21latency07:53:140
121360ksoftirqd/1121650irq/29-eth0_g0_11:48:271
121360ksoftirqd/1121650irq/29-eth0_g0_07:48:181
446699351cyclictest979-21grep09:03:201
121650350irq/29-eth0_g0_4941-21ntpdc07:08:180
121650350irq/29-eth0_g0_22854-21latency_hist08:23:000
121650350irq/29-eth0_g0_19648-21taskset08:08:170
121350ksoftirqd/1121750irq/30-eth0_g0_08:33:460
121350ksoftirqd/1121650irq/29-eth0_g0_10:30:551
446699341cyclictest5724-21latency_hist07:13:001
446699341cyclictest23012-21df_abs08:23:121
446699341cyclictest22102-21awk08:18:161
446699341cyclictest0-21swapper/108:51:091
121650340irq/29-eth0_g0_917-21unixbench_multi09:03:200
121650340irq/29-eth0_g0_7406-21cat07:18:170
121650340irq/29-eth0_g0_6082-21cat07:13:150
121650340irq/29-eth0_g0_13196-21df07:43:110
121650330irq/29-eth0_g0_29756-21sed08:48:230
121650330irq/29-eth0_g0_2126-21lldpd08:30:450
446699320cyclictest0-21swapper/107:18:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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