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2025-11-04 - 15:54

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 all highest latencies:
System rack3slot5s.osadl.org (updated Tue Nov 04, 2025 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2654521490sleep1121550irq/29-eth0_g0_10:23:191
924221380sleep1121550irq/29-eth0_g0_09:11:131
3151721240sleep1121550irq/29-eth0_g0_10:44:211
121860ksoftirqd/1121550irq/29-eth0_g0_10:26:430
64552830sleep0121550irq/29-eth0_g0_11:14:280
167922670sleep0121550irq/29-eth0_g0_09:43:420
254422630sleep0121650irq/30-eth0_g0_10:19:420
121590ksoftirqd/1121550irq/29-eth0_g0_11:46:030
121480ksoftirqd/1121650irq/30-eth0_g0_09:37:451
65632460sleep0121550irq/29-eth0_g0_11:14:470
121650460irq/30-eth0_g0_302622sleep110:38:581
121450ksoftirqd/1121550irq/29-eth0_g0_11:21:271
121550440irq/29-eth0_g0_121ksoftirqd/109:34:441
121440ksoftirqd/1121650irq/30-eth0_g0_11:31:160
121440ksoftirqd/1121550irq/29-eth0_g0_10:01:041
121650430irq/30-eth0_g0_470-21kworker/1:110:11:511
121650430irq/30-eth0_g0_121ksoftirqd/111:09:561
121550430irq/29-eth0_g0_31ksoftirqd/011:29:430
121550430irq/29-eth0_g0_31ksoftirqd/011:19:560
121550430irq/29-eth0_g0_31ksoftirqd/009:23:330
121550430irq/29-eth0_g0_28794-21ethtool08:19:580
121550430irq/29-eth0_g0_13-21kworker/0:111:56:060
121550430irq/29-eth0_g0_0-21swapper/007:35:000
121430ksoftirqd/1121650irq/30-eth0_g0_07:14:200
121430ksoftirqd/1121550irq/29-eth0_g0_09:26:031
1138099431cyclictest11420-21cat11:34:441
121650420irq/30-eth0_g0_470-21kworker/1:112:37:021
121650420irq/30-eth0_g0_10909-21unixbench_singl07:05:061
121550420irq/29-eth0_g0_1955-21runrttasks09:32:170
121550420irq/29-eth0_g0_13-21kworker/0:110:04:260
121550420irq/29-eth0_g0_10923-21unixbench_singl07:05:060
121420ksoftirqd/1121550irq/29-eth0_g0_12:21:051
121420ksoftirqd/1121550irq/29-eth0_g0_09:52:361
121420ksoftirqd/1121550irq/29-eth0_g0_09:42:291
11380994227cyclictest1955-21runrttasks08:23:381
121650410irq/30-eth0_g0_470-21kworker/1:111:07:541
121650410irq/30-eth0_g0_121ksoftirqd/111:39:591
121550410irq/29-eth0_g0_31ksoftirqd/007:15:040
121550410irq/29-eth0_g0_13-21kworker/0:110:38:460
121550410irq/29-eth0_g0_13-21kworker/0:110:06:330
121550410irq/29-eth0_g0_13-21kworker/0:110:06:330
121410ksoftirqd/1121650irq/30-eth0_g0_09:55:050
1138099411cyclictest25259-21missed_timers12:29:591
257902400sleep0121550irq/29-eth0_g0_12:31:210
168992400sleep016904-21sendmail_mailqu07:30:050
121650400irq/30-eth0_g0_470-21kworker/1:112:16:511
121650400irq/30-eth0_g0_121ksoftirqd/112:27:211
121650400irq/30-eth0_g0_121ksoftirqd/111:18:481
121650400irq/30-eth0_g0_121ksoftirqd/110:46:581
121650400irq/30-eth0_g0_121ksoftirqd/110:07:591
121650400irq/30-eth0_g0_121ksoftirqd/110:07:591
121650400irq/30-eth0_g0_10376-21chrt09:15:111
121650400irq/30-eth0_g0_10376-21chrt09:15:111
121550400irq/29-eth0_g0_31ksoftirqd/012:15:160
121550400irq/29-eth0_g0_20425-21ntpdc07:45:000
121550400irq/29-eth0_g0_20425-21ntpdc07:45:000
121550400irq/29-eth0_g0_1955-21runrttasks09:26:350
121550400irq/29-eth0_g0_13-21kworker/0:112:29:270
121550400irq/29-eth0_g0_13-21kworker/0:112:24:230
121550400irq/29-eth0_g0_13-21kworker/0:110:49:530
121550400irq/29-eth0_g0_13-21kworker/0:110:49:530
121550400irq/29-eth0_g0_13-21kworker/0:110:22:530
121550400irq/29-eth0_g0_0-21swapper/011:04:570
121400ksoftirqd/1121650irq/30-eth0_g0_09:13:510
121400ksoftirqd/1121550irq/29-eth0_g0_07:36:411
183712390sleep0121550irq/29-eth0_g0_12:00:320
183712390sleep0121550irq/29-eth0_g0_12:00:320
121650390irq/30-eth0_g0_470-21kworker/1:111:29:281
121650390irq/30-eth0_g0_470-21kworker/1:109:47:411
121650390irq/30-eth0_g0_3060-21df_inode10:59:571
121650390irq/30-eth0_g0_121ksoftirqd/111:53:111
121650390irq/30-eth0_g0_0-21swapper/112:07:171
121650390irq/30-eth0_g0_0-21swapper/111:35:051
121550390irq/29-eth0_g0_13-21kworker/0:112:11:010
121550390irq/29-eth0_g0_13-21kworker/0:110:32:440
121550390irq/29-eth0_g0_13-21kworker/0:109:47:110
121550390irq/29-eth0_g0_13-21kworker/0:109:36:080
121390ksoftirqd/1121650irq/30-eth0_g0_12:35:050
121390ksoftirqd/1121650irq/30-eth0_g0_11:39:270
121390ksoftirqd/1121650irq/30-eth0_g0_10:58:090
121390ksoftirqd/1121650irq/30-eth0_g0_09:16:210
121390ksoftirqd/1121650irq/30-eth0_g0_09:16:210
121390ksoftirqd/1121650irq/30-eth0_g0_08:15:120
121390ksoftirqd/1121550irq/29-eth0_g0_10:15:251
121390ksoftirqd/1121550irq/29-eth0_g0_08:39:421
121390ksoftirqd/1121550irq/29-eth0_g0_07:44:261
11380993925cyclictest1955-21runrttasks08:03:051
1138099391cyclictest23129-21tail07:55:031
1138099391cyclictest12099-21sed07:10:061
121650380irq/30-eth0_g0_470-21kworker/1:112:04:191
121650380irq/30-eth0_g0_470-21kworker/1:112:04:191
121650380irq/30-eth0_g0_470-21kworker/1:109:55:021
121650380irq/30-eth0_g0_121ksoftirqd/111:58:541
121550380irq/29-eth0_g0_3288-21ntp_kernel_pll_11:00:010
121550380irq/29-eth0_g0_13-21kworker/0:110:49:220
121550380irq/29-eth0_g0_13-21kworker/0:110:39:550
121550380irq/29-eth0_g0_12941-21irqstats11:39:590
121550380irq/29-eth0_g0_121ksoftirqd/111:49:421
121380ksoftirqd/1121550irq/29-eth0_g0_09:04:191
121380ksoftirqd/1121550irq/29-eth0_g0_08:50:151
121650370irq/30-eth0_g0_470-21kworker/1:110:30:101
121550370irq/29-eth0_g0_7559-21seq09:05:030
121550370irq/29-eth0_g0_6647-21head09:00:060
121550370irq/29-eth0_g0_31ksoftirqd/010:13:520
121550370irq/29-eth0_g0_31ksoftirqd/007:54:560
121550370irq/29-eth0_g0_20006-21cat07:44:450
121550370irq/29-eth0_g0_15723-21cat07:25:050
121550370irq/29-eth0_g0_13-21kworker/0:111:51:540
121550370irq/29-eth0_g0_13-21kworker/0:109:52:400
121550370irq/29-eth0_g0_121ksoftirqd/110:50:031
121550370irq/29-eth0_g0_121ksoftirqd/110:50:031
1138099371cyclictest5382-21unixbench_multi08:55:061
1138099371cyclictest27394-21timerandwakeup10:25:261
1138099371cyclictest14567-21grep07:20:071
1138099371cyclictest0-21swapper/108:25:101
121650360irq/30-eth0_g0_470-21kworker/1:109:23:541
121650360irq/30-eth0_g0_121ksoftirqd/112:09:451
121550360irq/29-eth0_g0_29879-21df_abs08:24:560
121550360irq/29-eth0_g0_2677-21awk08:45:030
121550360irq/29-eth0_g0_25163-21irqstats08:05:010
121550360irq/29-eth0_g0_19472-21tail12:05:070
121550360irq/29-eth0_g0_1731-21unixbench_singl08:40:070
121550360irq/29-eth0_g0_14551-21unixbench_multi07:20:070
121360ksoftirqd/1121550irq/29-eth0_g0_08:09:591
1138099362cyclictest27770-21ntp_states08:15:041
1138099361cyclictest1868-21ethtool10:54:571
1138099361cyclictest1484-21chrt08:40:041
121550350irq/29-eth0_g0_32461-21if_eth008:34:590
121550350irq/29-eth0_g0_31ksoftirqd/008:00:000
121550350irq/29-eth0_g0_26392-21cat08:09:590
121550350irq/29-eth0_g0_1955-21runrttasks08:56:220
121550350irq/29-eth0_g0_1955-21runrttasks08:31:550
121550350irq/29-eth0_g0_0-21swapper/008:49:590
1138099351cyclictest312612sleep108:30:021
1138099351cyclictest2354-21df_abs08:44:581
121650340irq/30-eth0_g0_16835-21proc_pri07:30:041
121550340irq/29-eth0_g0_21829-21chrt07:50:190
1138099342cyclictest0-21swapper/107:45:051
1138099342cyclictest0-21swapper/107:45:051
1138099341cyclictest0-21swapper/107:14:581
121650330irq/30-eth0_g0_1138099cyclictest07:50:121
1138099331cyclictest0-21swapper/108:05:001
1138099331cyclictest0-21swapper/107:26:161
121650320irq/30-eth0_g0_0-21swapper/109:08:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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