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2026-09-02 - 13:04

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 376 highest latencies:
System rack3slot5s.osadl.org (updated Wed Sep 02, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3196421400sleep1121650irq/29-eth0_g0_21:14:351
1764321270sleep1121650irq/29-eth0_g0_22:26:211
1211110ksoftirqd/1121750irq/30-eth0_g0_00:35:401
1211060ksoftirqd/1121750irq/30-eth0_g0_19:47:541
121930ksoftirqd/1121750irq/30-eth0_g0_21:22:321
121830ksoftirqd/1121750irq/30-eth0_g0_22:19:560
199892740sleep1121750irq/30-eth0_g0_22:36:181
121710ksoftirqd/1121750irq/30-eth0_g0_22:21:150
161872690chrt121750irq/30-eth0_g0_20:10:571
161872690chrt121750irq/30-eth0_g0_20:10:571
110422680sleep0121750irq/30-eth0_g0_00:12:360
213392550sleep1121650irq/29-eth0_g0_22:41:451
121490ksoftirqd/1121750irq/30-eth0_g0_23:20:471
121490ksoftirqd/1121750irq/30-eth0_g0_23:00:051
121480ksoftirqd/1121750irq/30-eth0_g0_23:08:581
121470ksoftirqd/1121750irq/30-eth0_g0_23:27:481
121460ksoftirqd/1121750irq/30-eth0_g0_00:29:361
121750450irq/30-eth0_g0_1219-21kworker/1:222:07:121
121650450irq/29-eth0_g0_31567-21/usr/sbin/munin19:01:120
121450ksoftirqd/1121750irq/30-eth0_g0_22:16:251
121650440irq/29-eth0_g0_21500-21taskset22:43:370
121440ksoftirqd/1121750irq/30-eth0_g0_21:58:251
89062430chrt121750irq/30-eth0_g0_19:40:571
121750430irq/30-eth0_g0_5692sleep121:17:371
121750430irq/30-eth0_g0_1219-21kworker/1:221:42:401
121650430irq/29-eth0_g0_31ksoftirqd/019:21:070
121430ksoftirqd/1121650irq/29-eth0_g0_21:48:321
23852420sleep0121750irq/30-eth0_g0_23:36:390
121750420irq/30-eth0_g0_1219-21kworker/1:223:39:351
121420ksoftirqd/1121650irq/29-eth0_g0_00:19:030
56892410sleep0121650irq/29-eth0_g0_21:39:470
121750410irq/30-eth0_g0_1219-21kworker/1:222:32:511
121750410irq/30-eth0_g0_1219-21kworker/1:200:13:171
121750410irq/30-eth0_g0_0-21swapper/123:56:091
121750410irq/30-eth0_g0_0-21swapper/123:56:091
121650410irq/29-eth0_g0_31ksoftirqd/023:26:150
121650410irq/29-eth0_g0_31ksoftirqd/021:47:540
121650410irq/29-eth0_g0_31ksoftirqd/021:44:510
121650410irq/29-eth0_g0_13034-21taskset22:09:430
121650410irq/29-eth0_g0_13-21kworker/0:121:19:060
121650410irq/29-eth0_g0_13-21kworker/0:121:14:120
121650410irq/29-eth0_g0_13-21kworker/0:100:34:360
121650410irq/29-eth0_g0_113022pluginstate19:50:560
3271399402cyclictest6467-21latency_hist23:55:571
121750400irq/30-eth0_g0_6934-21/usr/sbin/munin19:31:151
121750400irq/30-eth0_g0_1219-21kworker/1:223:48:111
121750400irq/30-eth0_g0_1219-21kworker/1:222:01:141
121750400irq/30-eth0_g0_121ksoftirqd/123:32:281
121650400irq/29-eth0_g0_13-21kworker/0:123:14:190
121650400irq/29-eth0_g0_13-21kworker/0:123:03:340
121650400irq/29-eth0_g0_13-21kworker/0:122:32:110
121650400irq/29-eth0_g0_13-21kworker/0:122:29:360
121650400irq/29-eth0_g0_13-21kworker/0:100:28:320
121650400irq/29-eth0_g0_13-21kworker/0:100:01:410
121650400irq/29-eth0_g0_121ksoftirqd/122:58:040
121400ksoftirqd/1121750irq/30-eth0_g0_23:22:160
3271399392cyclictest15834-21df_inode22:21:091
3271399391cyclictest5982-21unixbench_singl19:26:201
3271399391cyclictest1988-21taskset19:11:141
121750390irq/30-eth0_g0_8818-21processes21:51:170
121750390irq/30-eth0_g0_1219-21kworker/1:222:49:051
121650390irq/29-eth0_g0_31ksoftirqd/023:43:240
121650390irq/29-eth0_g0_13-21kworker/0:123:06:560
121650390irq/29-eth0_g0_13-21kworker/0:122:47:320
121650390irq/29-eth0_g0_13-21kworker/0:122:39:570
121650390irq/29-eth0_g0_13-21kworker/0:121:33:190
121650390irq/29-eth0_g0_13-21kworker/0:121:23:110
121650390irq/29-eth0_g0_13-21kworker/0:100:09:010
121650390irq/29-eth0_g0_121ksoftirqd/123:04:131
121390ksoftirqd/1121750irq/30-eth0_g0_23:33:580
121390ksoftirqd/1121650irq/29-eth0_g0_00:23:461
3271399381cyclictest25070-21grep20:46:101
310942380sleep1121750irq/30-eth0_g0_23:21:191
1499380watchdog/138282sleep123:44:121
121750380irq/30-eth0_g0_1219-21kworker/1:221:34:551
121750380irq/30-eth0_g0_1219-21kworker/1:200:16:111
121750380irq/30-eth0_g0_1219-21kworker/1:200:03:521
121650380irq/29-eth0_g0_6707-21seq23:56:100
121650380irq/29-eth0_g0_6707-21seq23:56:100
121650380irq/29-eth0_g0_31ksoftirqd/020:56:170
121650380irq/29-eth0_g0_29722-21/usr/sbin/munin21:06:100
121650380irq/29-eth0_g0_1964-21runrttasks19:26:560
121650380irq/29-eth0_g0_17962-21proc_pri20:16:160
121650380irq/29-eth0_g0_13-21kworker/0:122:11:410
121650380irq/29-eth0_g0_13-21kworker/0:122:04:120
121650380irq/29-eth0_g0_10202-21tail21:56:200
3271399372cyclictest13313-21unixbench_singl19:56:181
3271399372cyclictest12042-21unixbench_multi19:51:211
3271399371cyclictest1964-21runrttasks23:14:231
121750370irq/30-eth0_g0_21820-21grep20:31:171
121750370irq/30-eth0_g0_0-21swapper/122:11:371
121650370irq/29-eth0_g0_409-21df_abs19:06:100
121650370irq/29-eth0_g0_29715-21wc23:16:170
121650370irq/29-eth0_g0_1964-21runrttasks20:28:040
121650370irq/29-eth0_g0_19114-21/usr/sbin/munin20:21:150
121650370irq/29-eth0_g0_13-21kworker/0:123:53:160
121650370irq/29-eth0_g0_13-21kworker/0:121:27:410
121370ksoftirqd/1121650irq/29-eth0_g0_20:23:151
3271399362cyclictest1928-21sshd21:09:171
3271399362cyclictest16343-21df_abs20:11:081
3271399361cyclictest9602-21unixbench_multi19:41:171
121750360irq/30-eth0_g0_1219-21kworker/1:221:39:281
121750360irq/30-eth0_g0_1219-21kworker/1:200:07:461
121650360irq/29-eth0_g0_9121-21forks19:41:080
121650360irq/29-eth0_g0_8379-21unixbench_multi19:36:170
121650360irq/29-eth0_g0_32446-21runrttasks19:02:571
121650360irq/29-eth0_g0_25417-21chrt20:46:170
121650360irq/29-eth0_g0_1964-21runrttasks23:50:030
121650360irq/29-eth0_g0_1964-21runrttasks20:51:060
121650360irq/29-eth0_g0_1964-21runrttasks20:45:250
121650360irq/29-eth0_g0_1964-21runrttasks20:32:450
121650360irq/29-eth0_g0_14568-21vmstat20:01:180
121650360irq/29-eth0_g0_13027-21ntpdc00:21:130
121650360irq/29-eth0_g0_13-21kworker/0:122:53:260
121360ksoftirqd/1121650irq/29-eth0_g0_22:51:171
32713993519cyclictest19943-21/usr/sbin/munin20:26:101
3271399351cyclictest3158-21cat19:16:121
3271399351cyclictest23007-21/usr/sbin/munin20:36:181
3271399351cyclictest0-21swapper/119:21:501
121750350irq/30-eth0_g0_1219-21kworker/1:221:27:071
121650350irq/29-eth0_g0_31ksoftirqd/019:11:140
121650350irq/29-eth0_g0_1964-21runrttasks21:02:250
121650350irq/29-eth0_g0_1964-21runrttasks20:11:550
121650350irq/29-eth0_g0_1964-21runrttasks20:09:160
121650350irq/29-eth0_g0_1964-21runrttasks20:09:160
121650350irq/29-eth0_g0_1964-21runrttasks19:16:200
3271399341cyclictest601-21wc19:06:131
3271399341cyclictest288732sleep121:01:121
3271399341cyclictest26580-21seq20:51:171
3271399341cyclictest0-21swapper/120:04:421
121750340irq/30-eth0_g0_1219-21kworker/1:221:54:281
121650340irq/29-eth0_g0_22602-21interrupts20:36:110
121650340irq/29-eth0_g0_12087-21sed19:51:220
3271399331cyclictest236642sleep120:41:091
121750330irq/30-eth0_g0_0-21swapper/120:16:091
121650330irq/29-eth0_g0_1964-21runrttasks19:56:030
3271399321cyclictest27797-21ps20:56:151
121650320irq/29-eth0_g0_6499-21/usr/sbin/munin19:31:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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