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2026-07-10 - 03:05

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 Jul 10, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121900ksoftirqd/1121750irq/30-eth0_g0_19:28:180
121750ksoftirqd/1288172chrt19:03:380
121750ksoftirqd/1121750irq/30-eth0_g0_22:34:541
121680ksoftirqd/12921299cyclictest23:18:171
121670ksoftirqd/1121650irq/29-eth0_g0_22:18:201
94912570sleep0121750irq/30-eth0_g0_22:11:020
19732570sleep0121650irq/29-eth0_g0_21:39:050
13952520sleep1121650irq/29-eth0_g0_23:49:181
121500ksoftirqd/1121750irq/30-eth0_g0_23:23:101
121500ksoftirqd/1121750irq/30-eth0_g0_22:40:451
121490ksoftirqd/1121750irq/30-eth0_g0_23:45:501
121490ksoftirqd/1121750irq/30-eth0_g0_23:42:410
121650480irq/29-eth0_g0_31ksoftirqd/021:53:240
121480ksoftirqd/1121750irq/30-eth0_g0_00:32:071
121460ksoftirqd/1121750irq/30-eth0_g0_23:41:061
121650450irq/29-eth0_g0_31ksoftirqd/022:26:240
121450ksoftirqd/1121750irq/30-eth0_g0_22:32:151
194342440sleep1121650irq/29-eth0_g0_22:52:501
121750440irq/30-eth0_g0_1219-21kworker/1:200:14:441
121650440irq/29-eth0_g0_7434-21df_abs22:03:170
121440ksoftirqd/1121650irq/29-eth0_g0_22:09:321
121440ksoftirqd/1121650irq/29-eth0_g0_22:08:061
121440ksoftirqd/1121650irq/29-eth0_g0_00:24:521
309692430sleep0121650irq/29-eth0_g0_21:26:590
121750430irq/30-eth0_g0_1219-21kworker/1:223:33:241
121750430irq/30-eth0_g0_1219-21kworker/1:200:20:291
121650430irq/29-eth0_g0_31ksoftirqd/023:58:300
121650430irq/29-eth0_g0_121ksoftirqd/122:27:121
121650430irq/29-eth0_g0_121ksoftirqd/122:00:530
121650430irq/29-eth0_g0_0-21swapper/023:28:270
121430ksoftirqd/1121650irq/29-eth0_g0_22:29:190
121650420irq/29-eth0_g0_31ksoftirqd/021:19:140
121650420irq/29-eth0_g0_31ksoftirqd/000:23:300
121650420irq/29-eth0_g0_13-21kworker/0:122:41:090
121650420irq/29-eth0_g0_12337-21sed00:33:280
32352410sleep1121750irq/30-eth0_g0_21:44:301
121750410irq/30-eth0_g0_28129-21df_abs19:03:171
121750410irq/30-eth0_g0_121ksoftirqd/100:04:561
121650410irq/29-eth0_g0_13-21kworker/0:122:50:500
121410ksoftirqd/1121750irq/30-eth0_g0_23:00:130
121410ksoftirqd/1121650irq/29-eth0_g0_21:05:421
2921299401cyclictest31200-21unixbench_singl19:13:271
121750400irq/30-eth0_g0_1219-21kworker/1:223:29:141
121750400irq/30-eth0_g0_1219-21kworker/1:222:58:581
121750400irq/30-eth0_g0_1219-21kworker/1:221:51:371
121750400irq/30-eth0_g0_1219-21kworker/1:221:51:371
121750400irq/30-eth0_g0_121ksoftirqd/121:11:081
121650400irq/29-eth0_g0_13-21kworker/0:121:46:470
121650400irq/29-eth0_g0_0-21swapper/021:13:290
121400ksoftirqd/1121650irq/29-eth0_g0_23:59:191
2921299391cyclictest21309-21cat20:48:061
204282390sleep0121650irq/29-eth0_g0_22:55:070
121750390irq/30-eth0_g0_31ksoftirqd/022:34:280
121750390irq/30-eth0_g0_1219-21kworker/1:221:14:481
121750390irq/30-eth0_g0_121ksoftirqd/121:57:401
121650390irq/29-eth0_g0_31ksoftirqd/023:53:300
121650390irq/29-eth0_g0_31ksoftirqd/000:18:520
121650390irq/29-eth0_g0_13-21kworker/0:123:23:010
121650390irq/29-eth0_g0_13-21kworker/0:123:04:520
121650390irq/29-eth0_g0_13-21kworker/0:121:29:450
2921299382cyclictest9457-21taskset19:58:211
2921299382cyclictest23280-21df23:08:161
29212993810cyclictest0-21swapper/123:15:101
238142380sleep0121650irq/29-eth0_g0_23:08:250
121750380irq/30-eth0_g0_1219-21kworker/1:221:42:171
121750380irq/30-eth0_g0_1219-21kworker/1:221:22:591
121750380irq/30-eth0_g0_121ksoftirqd/122:14:561
121750380irq/30-eth0_g0_121ksoftirqd/121:27:281
121750380irq/30-eth0_g0_121ksoftirqd/100:34:561
121650380irq/29-eth0_g0_4916-21unixbench_singl19:38:270
121650380irq/29-eth0_g0_31ksoftirqd/023:51:430
121650380irq/29-eth0_g0_31ksoftirqd/023:47:200
121650380irq/29-eth0_g0_31ksoftirqd/021:48:220
121650380irq/29-eth0_g0_31ksoftirqd/021:48:220
121650380irq/29-eth0_g0_2921199cyclictest00:08:190
121650380irq/29-eth0_g0_1964-21runrttasks20:06:150
121650380irq/29-eth0_g0_1964-21runrttasks19:43:240
121650380irq/29-eth0_g0_18871-21ls20:38:060
121650380irq/29-eth0_g0_13-21kworker/0:123:16:540
121650380irq/29-eth0_g0_13-21kworker/0:122:13:200
121650380irq/29-eth0_g0_121ksoftirqd/122:43:571
121380ksoftirqd/1121650irq/29-eth0_g0_00:07:390
2921299372cyclictest29766-21proc_pri19:08:261
2921299371cyclictest24467-21unixbench_singl20:58:271
2921299371cyclictest23259-21head20:53:261
2921299371cyclictest15301-21df_abs20:23:171
121750370irq/30-eth0_g0_1219-21kworker/1:223:03:261
121750370irq/30-eth0_g0_1219-21kworker/1:222:55:071
121750370irq/30-eth0_g0_1219-21kworker/1:221:34:041
121750370irq/30-eth0_g0_1219-21kworker/1:221:34:041
121650370irq/29-eth0_g0_24379-21cat20:58:260
121650370irq/29-eth0_g0_21983-21unixbench_multi20:48:270
121650370irq/29-eth0_g0_1964-21runrttasks23:26:450
121650370irq/29-eth0_g0_1964-21runrttasks19:37:210
121650370irq/29-eth0_g0_13-21kworker/0:123:33:480
121650370irq/29-eth0_g0_13-21kworker/0:122:45:520
121650370irq/29-eth0_g0_13-21kworker/0:121:09:580
121650370irq/29-eth0_g0_11511-21rt-features22:18:270
121370ksoftirqd/1121650irq/29-eth0_g0_19:32:321
63162360chrt121650irq/29-eth0_g0_00:09:221
2921299361cyclictest6137-21grep19:43:271
2921299361cyclictest2394-21awk23:53:281
2921299361cyclictest17095-21unixbench_multi20:28:291
2921299361cyclictest13252-21proc_pri20:13:231
2921299361cyclictest11745-21if_err_eth020:08:181
2921299361cyclictest10987-21unixbench_multi20:03:271
121750360irq/30-eth0_g0_15172-21latency_hist20:23:061
121750360irq/30-eth0_g0_1219-21kworker/1:222:00:091
121650360irq/29-eth0_g0_821-21missed_timers19:23:220
121650360irq/29-eth0_g0_7023-21memory00:13:200
121650360irq/29-eth0_g0_32373-21grep19:18:270
121650360irq/29-eth0_g0_32373-21grep19:18:270
121650360irq/29-eth0_g0_31523-21netstat21:28:201
121650360irq/29-eth0_g0_22892-21missed_timers20:53:200
121650360irq/29-eth0_g0_2093-21snmpd20:18:030
121650360irq/29-eth0_g0_1964-21runrttasks21:33:140
121650360irq/29-eth0_g0_1964-21runrttasks21:33:140
121650360irq/29-eth0_g0_1964-21runrttasks20:20:460
121650360irq/29-eth0_g0_1964-21runrttasks19:55:020
121650360irq/29-eth0_g0_1964-21runrttasks19:10:250
121650360irq/29-eth0_g0_15928-21unixbench_singl20:23:270
121650360irq/29-eth0_g0_13-21kworker/0:100:28:560
2921299351cyclictest4766-21find19:38:251
121750350irq/30-eth0_g0_8589-21unixbench_singl19:53:261
121750350irq/30-eth0_g0_121ksoftirqd/120:48:351
121650350irq/29-eth0_g0_30527-21/usr/sbin/munin19:13:150
121650350irq/29-eth0_g0_20525-21ntpq20:43:220
121650350irq/29-eth0_g0_1964-21runrttasks20:30:050
121650350irq/29-eth0_g0_11721-21/usr/sbin/munin20:08:170
29212993418cyclictest19606-21grep20:38:271
2921299341cyclictest3424-21/usr/sbin/munin19:33:241
2921299341cyclictest31995-21latency19:18:201
2921299341cyclictest31995-21latency19:18:201
2921299341cyclictest14502sleep119:25:341
2921299340cyclictest0-21swapper/119:49:181
121650340irq/29-eth0_g0_9812-21grep19:58:280
121650340irq/29-eth0_g0_6738-21df19:48:160
121650340irq/29-eth0_g0_0-21swapper/021:03:220
121750330irq/30-eth0_g0_18210-21sendmail_mailqu20:33:251
121650330irq/29-eth0_g0_19038-21sed20:38:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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