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2026-08-30 - 03:13

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 Sun Aug 30, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1243821270chrt121650irq/29-eth0_g0_21:41:291
3069921040sleep0121650irq/29-eth0_g0_22:56:320
121890ksoftirqd/1121750irq/30-eth0_g0_23:41:371
121640ksoftirqd/1121650irq/29-eth0_g0_22:36:291
121630ksoftirqd/1121650irq/29-eth0_g0_23:41:250
224472530sleep1121750irq/30-eth0_g0_22:24:541
101192530sleep1121750irq/30-eth0_g0_19:21:141
121520ksoftirqd/1121750irq/30-eth0_g0_21:06:401
46612510sleep1121650irq/29-eth0_g0_23:24:581
33452500sleep0121650irq/29-eth0_g0_23:18:420
121500ksoftirqd/1121750irq/30-eth0_g0_22:37:510
121500ksoftirqd/1121750irq/30-eth0_g0_21:11:220
132392480sleep1121650irq/29-eth0_g0_00:00:291
121480ksoftirqd/1121750irq/30-eth0_g0_22:43:021
121480ksoftirqd/1112582sleep019:26:040
121470ksoftirqd/1121650irq/29-eth0_g0_22:01:550
129542460sleep0121650irq/29-eth0_g0_23:57:020
121750460irq/30-eth0_g0_103282sleep123:46:231
121460ksoftirqd/1121750irq/30-eth0_g0_23:28:131
121650450irq/29-eth0_g0_7944-21unixbench_multi23:36:250
121650450irq/29-eth0_g0_31ksoftirqd/021:16:240
121450ksoftirqd/1121750irq/30-eth0_g0_23:19:351
121450ksoftirqd/1121750irq/30-eth0_g0_23:13:561
121450ksoftirqd/1121750irq/30-eth0_g0_23:13:561
121450ksoftirqd/1121750irq/30-eth0_g0_22:48:401
121450ksoftirqd/1121750irq/30-eth0_g0_21:17:501
121440ksoftirqd/1121650irq/29-eth0_g0_23:39:031
121750430irq/30-eth0_g0_1219-21kworker/1:223:53:081
121750430irq/30-eth0_g0_1219-21kworker/1:222:05:211
121430ksoftirqd/1121750irq/30-eth0_g0_22:59:001
121430ksoftirqd/1121750irq/30-eth0_g0_21:47:261
69952420sleep0121750irq/30-eth0_g0_23:33:370
69952420sleep0121750irq/30-eth0_g0_23:33:370
121750420irq/30-eth0_g0_1219-21kworker/1:223:33:021
121750420irq/30-eth0_g0_1219-21kworker/1:223:33:021
121750420irq/30-eth0_g0_1219-21kworker/1:222:30:061
121650420irq/29-eth0_g0_13562-21grep21:46:260
121420ksoftirqd/1121650irq/29-eth0_g0_23:08:301
121750410irq/30-eth0_g0_1219-21kworker/1:200:28:261
121650410irq/29-eth0_g0_5942-21unixbench_singl19:01:290
121650410irq/29-eth0_g0_31ksoftirqd/023:12:270
121650410irq/29-eth0_g0_31ksoftirqd/023:12:270
121650410irq/29-eth0_g0_15602-21wc21:56:170
121650410irq/29-eth0_g0_10315-21timerandwakeup23:46:230
121410ksoftirqd/1121650irq/29-eth0_g0_21:37:561
121410ksoftirqd/1121650irq/29-eth0_g0_00:08:441
121750400irq/30-eth0_g0_76892sleep121:22:571
121750400irq/30-eth0_g0_29751-21runrttasks22:54:461
121750400irq/30-eth0_g0_1219-21kworker/1:222:11:271
121750400irq/30-eth0_g0_1219-21kworker/1:221:13:461
121650400irq/29-eth0_g0_31ksoftirqd/022:31:120
121650400irq/29-eth0_g0_13-21kworker/0:123:22:010
121650400irq/29-eth0_g0_13-21kworker/0:123:03:340
121650400irq/29-eth0_g0_13-21kworker/0:122:20:570
121650400irq/29-eth0_g0_13-21kworker/0:122:06:060
121650400irq/29-eth0_g0_13-21kworker/0:121:41:290
121650400irq/29-eth0_g0_13-21kworker/0:121:10:220
638499391cyclictest191082sleep119:56:211
121750390irq/30-eth0_g0_1219-21kworker/1:222:06:081
121750390irq/30-eth0_g0_121ksoftirqd/122:16:311
121650390irq/29-eth0_g0_6474-21/usr/sbin/munin19:06:170
121650390irq/29-eth0_g0_31ksoftirqd/022:43:410
121650390irq/29-eth0_g0_13-21kworker/0:123:26:360
121650390irq/29-eth0_g0_13-21kworker/0:122:29:380
121650390irq/29-eth0_g0_13-21kworker/0:122:14:010
121650390irq/29-eth0_g0_13-21kworker/0:121:52:490
121650390irq/29-eth0_g0_13-21kworker/0:100:31:380
121650390irq/29-eth0_g0_117042sleep023:51:380
121390ksoftirqd/1121650irq/29-eth0_g0_21:34:231
638499386cyclictest121750irq/30-eth0_g0_23:05:061
638499381cyclictest6601-21df_abs19:06:151
638499381cyclictest203752sleep120:01:261
638499381cyclictest203752sleep120:01:261
638499381cyclictest1425-21unixbench_singl20:56:251
638499381cyclictest11859-21find19:26:251
121750380irq/30-eth0_g0_14374-21irqstats21:51:181
121750380irq/30-eth0_g0_1219-21kworker/1:221:26:511
121650380irq/29-eth0_g0_1964-21runrttasks23:10:390
121650380irq/29-eth0_g0_1964-21runrttasks21:03:380
121650380irq/29-eth0_g0_13-21kworker/0:122:23:300
121650380irq/29-eth0_g0_13-21kworker/0:121:36:530
121650380irq/29-eth0_g0_13-21kworker/0:121:32:520
121650380irq/29-eth0_g0_121ksoftirqd/100:03:490
638499372cyclictest15723-21netstat21:56:191
638499372cyclictest15422-21proc_pri19:41:231
638499371cyclictest273692sleep120:31:161
638499371cyclictest21391-21grep00:31:271
638499371cyclictest17733-21sed00:16:261
121750370irq/30-eth0_g0_1219-21kworker/1:200:01:271
121750370irq/30-eth0_g0_0-21swapper/120:21:171
121650370irq/29-eth0_g0_7466-21grep21:21:260
121650370irq/29-eth0_g0_31ksoftirqd/000:16:220
121650370irq/29-eth0_g0_20179-21ntp_kernel_err20:01:220
121650370irq/29-eth0_g0_20179-21ntp_kernel_err20:01:220
121650370irq/29-eth0_g0_1964-21runrttasks22:52:540
121650370irq/29-eth0_g0_1964-21runrttasks20:18:060
121650370irq/29-eth0_g0_13-21kworker/0:100:28:310
121650370irq/29-eth0_g0_13-21kworker/0:100:13:450
121650370irq/29-eth0_g0_13-21kworker/0:100:07:480
121650370irq/29-eth0_g0_121ksoftirqd/100:26:020
121650370irq/29-eth0_g0_0-21swapper/021:27:230
121650370irq/29-eth0_g0_0-21swapper/019:50:110
638499362cyclictest23400-21cat20:16:041
638499362cyclictest0-21swapper/119:51:031
638499361cyclictest28366-21df20:36:141
638499361cyclictest26006-21sed20:26:151
638499361cyclictest23905-21proc_pri20:16:231
638499361cyclictest212352sleep120:06:171
638499361cyclictest16039-21ethtool00:11:171
121650360irq/29-eth0_g0_31383-21sed20:46:260
121650360irq/29-eth0_g0_21402-21grep20:06:200
121650360irq/29-eth0_g0_1964-21runrttasks20:43:560
121650360irq/29-eth0_g0_1964-21runrttasks20:43:560
121650360irq/29-eth0_g0_1964-21runrttasks20:36:500
121650360irq/29-eth0_g0_1964-21runrttasks19:11:370
121650360irq/29-eth0_g0_13198-21unixbench_multi19:31:250
121650360irq/29-eth0_g0_13-21kworker/0:122:47:400
121650360irq/29-eth0_g0_0-21swapper/019:21:040
638499352cyclictest13983-21iostat19:36:191
638499351cyclictest80662sleep119:11:211
638499351cyclictest31026-21expr20:46:191
638499351cyclictest29581-21chrt20:41:151
638499351cyclictest29581-21chrt20:41:151
638499351cyclictest18851-21sort00:21:251
638499351cyclictest0-21swapper/121:01:231
121750350irq/30-eth0_g0_6380-21munin-run19:06:031
121750350irq/30-eth0_g0_12633-21df_abs19:31:161
121750350irq/30-eth0_g0_0-21swapper/122:32:051
121650350irq/29-eth0_g0_32465-21sendmail_mailqu20:51:220
121650350irq/29-eth0_g0_27080-21/usr/sbin/munin20:31:130
121650350irq/29-eth0_g0_25252-21ls20:21:240
121650350irq/29-eth0_g0_23399-21latency_hist20:16:040
121650350irq/29-eth0_g0_1964-21runrttasks20:26:300
121650350irq/29-eth0_g0_1964-21runrttasks19:37:530
121650350irq/29-eth0_g0_19235-21unixbench_multi19:56:230
638499341cyclictest9595-21grep19:16:251
121650340irq/29-eth0_g0_17519-21df19:51:140
121650340irq/29-eth0_g0_11708-21ntpdc19:26:220
638499331cyclictest17929-21taskset19:51:241
121650330irq/29-eth0_g0_15032-21df_abs19:41:150
121750320irq/30-eth0_g0_32476-21sendmail_mailst20:51:221
121650320irq/29-eth0_g0_1400-21sed20:56:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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