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2026-09-04 - 19:07

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 Fri Sep 04, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
222972910sleep0121650irq/29-eth0_g0_11:59:290
121860ksoftirqd/1121750irq/30-eth0_g0_11:31:090
121860ksoftirqd/1121750irq/30-eth0_g0_11:31:090
309402730sleep1121650irq/29-eth0_g0_12:35:271
121670ksoftirqd/1121750irq/30-eth0_g0_12:18:200
121670ksoftirqd/1121750irq/30-eth0_g0_12:18:200
121660ksoftirqd/1121750irq/30-eth0_g0_10:17:270
121630ksoftirqd/1148382chrt07:03:170
196232540sleep1121750irq/30-eth0_g0_09:36:031
22472490sleep0121750irq/30-eth0_g0_10:36:100
213982490chrt121650irq/29-eth0_g0_09:41:210
121470ksoftirqd/1121750irq/30-eth0_g0_12:10:461
121470ksoftirqd/1121750irq/30-eth0_g0_09:45:471
121470ksoftirqd/1121650irq/29-eth0_g0_08:11:050
121460ksoftirqd/1121750irq/30-eth0_g0_10:25:231
121460ksoftirqd/1121750irq/30-eth0_g0_10:02:351
121460ksoftirqd/1121750irq/30-eth0_g0_10:02:351
121650450irq/29-eth0_g0_13-21kworker/0:112:11:090
121650450irq/29-eth0_g0_121ksoftirqd/109:37:060
121750440irq/30-eth0_g0_1219-21kworker/1:211:29:381
121750440irq/30-eth0_g0_121ksoftirqd/109:53:351
121650440irq/29-eth0_g0_121ksoftirqd/111:36:131
121650440irq/29-eth0_g0_121ksoftirqd/110:39:361
121650430irq/29-eth0_g0_2925-21cpu10:41:000
121650430irq/29-eth0_g0_2925-21cpu10:41:000
121430ksoftirqd/1121750irq/30-eth0_g0_11:21:301
121430ksoftirqd/1121650irq/29-eth0_g0_10:46:091
121430ksoftirqd/1121650irq/29-eth0_g0_09:08:320
89722420sleep18975-21latency_hist11:05:511
121750420irq/30-eth0_g0_1219-21kworker/1:209:47:491
121650420irq/29-eth0_g0_17998-21ntp_offset11:41:060
121650420irq/29-eth0_g0_121ksoftirqd/112:21:100
121650420irq/29-eth0_g0_0-21swapper/010:56:100
121650410irq/29-eth0_g0_8428-21unixbench_multi11:01:110
121650410irq/29-eth0_g0_7110-21latency_hist08:45:500
121650410irq/29-eth0_g0_31ksoftirqd/011:36:120
121650410irq/29-eth0_g0_13-21kworker/0:109:22:110
197392400sleep1121750irq/30-eth0_g0_11:48:121
121750400irq/30-eth0_g0_1219-21kworker/1:211:52:021
121750400irq/30-eth0_g0_1219-21kworker/1:210:28:401
121650400irq/29-eth0_g0_15069-21cyclictest11:16:051
121650400irq/29-eth0_g0_13-21kworker/0:112:10:230
121650400irq/29-eth0_g0_13-21kworker/0:111:17:450
121650400irq/29-eth0_g0_13-21kworker/0:110:32:060
121650400irq/29-eth0_g0_13-21kworker/0:110:28:560
121650400irq/29-eth0_g0_13-21kworker/0:110:24:460
121650400irq/29-eth0_g0_13-21kworker/0:110:01:110
121650400irq/29-eth0_g0_13-21kworker/0:110:01:110
121650400irq/29-eth0_g0_13-21kworker/0:109:31:310
121650400irq/29-eth0_g0_13-21kworker/0:109:31:310
121400ksoftirqd/1121650irq/29-eth0_g0_09:21:201
1507199391cyclictest13833-21seq09:11:081
1507199391cyclictest0-21swapper/110:11:061
121750390irq/30-eth0_g0_14471-21sendmail_mailst07:01:111
121750390irq/30-eth0_g0_121ksoftirqd/110:34:051
121750390irq/30-eth0_g0_0-21swapper/110:42:041
121750390irq/30-eth0_g0_0-21swapper/110:42:041
121650390irq/29-eth0_g0_31ksoftirqd/010:53:230
121650390irq/29-eth0_g0_31ksoftirqd/010:12:050
121650390irq/29-eth0_g0_31ksoftirqd/009:49:580
121650390irq/29-eth0_g0_31ksoftirqd/009:15:470
121650390irq/29-eth0_g0_23330-21iostat09:51:040
121650390irq/29-eth0_g0_21727-21proc_pri07:31:070
121650390irq/29-eth0_g0_1964-21runrttasks10:09:400
121650390irq/29-eth0_g0_13-21kworker/0:112:27:450
121650390irq/29-eth0_g0_13-21kworker/0:111:52:230
121650390irq/29-eth0_g0_13-21kworker/0:111:09:350
121650390irq/29-eth0_g0_13-21kworker/0:109:57:090
121650390irq/29-eth0_g0_13-21kworker/0:109:26:480
121650390irq/29-eth0_g0_121ksoftirqd/109:06:581
121390ksoftirqd/1121750irq/30-eth0_g0_11:49:500
121390ksoftirqd/1121650irq/29-eth0_g0_11:56:241
121390ksoftirqd/1121650irq/29-eth0_g0_07:15:191
1507199382cyclictest18070-21grep11:41:081
1507199381cyclictest29301-21grep12:26:101
1507199381cyclictest24983-21grep09:56:121
121750380irq/30-eth0_g0_9631-21/usr/sbin/munin08:56:001
121750380irq/30-eth0_g0_1219-21kworker/1:212:01:091
121750380irq/30-eth0_g0_1219-21kworker/1:211:33:531
121750380irq/30-eth0_g0_1219-21kworker/1:211:33:531
121750380irq/30-eth0_g0_1219-21kworker/1:210:53:071
121750380irq/30-eth0_g0_1219-21kworker/1:210:16:571
121750380irq/30-eth0_g0_1219-21kworker/1:209:31:391
121750380irq/30-eth0_g0_1219-21kworker/1:209:31:391
121750380irq/30-eth0_g0_121ksoftirqd/112:23:121
121750380irq/30-eth0_g0_121ksoftirqd/112:12:521
121750380irq/30-eth0_g0_121ksoftirqd/109:30:181
121750380irq/30-eth0_g0_121ksoftirqd/109:18:241
121650380irq/29-eth0_g0_4841-21unixbench_singl10:46:150
121650380irq/29-eth0_g0_31ksoftirqd/009:18:360
121650380irq/29-eth0_g0_25184-21ls07:46:040
121650380irq/29-eth0_g0_1964-21runrttasks09:02:430
121650380irq/29-eth0_g0_13-21kworker/0:111:23:020
121380ksoftirqd/1121650irq/29-eth0_g0_07:20:121
1507199372cyclictest5450-21grep08:36:121
1507199372cyclictest0-21swapper/108:16:111
1507199371cyclictest7265-21head10:56:121
1507199371cyclictest24078-21netstat07:41:061
1507199371cyclictest23074-21sort07:36:121
121750370irq/30-eth0_g0_1219-21kworker/1:211:10:211
121750370irq/30-eth0_g0_1219-21kworker/1:210:07:221
121750370irq/30-eth0_g0_121ksoftirqd/111:11:031
121650370irq/29-eth0_g0_15785-21unixbench_multi07:06:120
121650370irq/29-eth0_g0_14321-21awk11:26:110
121650370irq/29-eth0_g0_13-21kworker/0:112:01:540
121650370irq/29-eth0_g0_13-21kworker/0:111:11:350
799360migration/029302-21unixbench_singl08:01:120
1507199362cyclictest21173-21latency_hist07:30:511
1507199361cyclictest3856-21missed_timers08:31:081
1507199361cyclictest30917-21chrt08:10:201
1507199361cyclictest1356-21chrt08:21:051
1507199361cyclictest1356-21chrt08:21:051
1507199361cyclictest11416-21awk09:01:101
121750360irq/30-eth0_g0_1219-21kworker/1:212:18:021
121750360irq/30-eth0_g0_1219-21kworker/1:212:18:021
121650360irq/29-eth0_g0_7875-21unixbench_singl08:46:130
121650360irq/29-eth0_g0_4695-21latency_hist08:35:510
121650360irq/29-eth0_g0_26829-21grep07:51:090
121650360irq/29-eth0_g0_1964-21runrttasks09:00:000
121650360irq/29-eth0_g0_1964-21runrttasks07:57:070
121650360irq/29-eth0_g0_19070-21latency07:21:050
121650360irq/29-eth0_g0_16449-21grep07:11:020
314362350sleep131438-21awk08:11:051
1507199351cyclictest27686-21cat07:56:061
1507199351cyclictest26781-21unixbench_multi07:51:081
1507199351cyclictest21563-21missed_timers07:31:031
121750350irq/30-eth0_g0_25605-21unixbench_singl07:46:121
121650350irq/29-eth0_g0_5152-21ntp_states08:36:080
121650350irq/29-eth0_g0_30527-21unixbench_singl12:31:110
121650350irq/29-eth0_g0_30293-21proc_pri08:06:090
121650350irq/29-eth0_g0_1964-21runrttasks08:25:320
121650350irq/29-eth0_g0_1964-21runrttasks08:25:320
121650350irq/29-eth0_g0_17659-21df07:16:020
15071993419cyclictest19456-21grep07:21:121
1507199341cyclictest6375-21ntp_states08:41:081
1507199341cyclictest28930-21seq08:01:061
1507199341cyclictest15549-21awk07:06:081
121650340irq/29-eth0_g0_24879-21latency_hist07:45:510
121650340irq/29-eth0_g0_23089-21timerandwakeup07:36:120
121650340irq/29-eth0_g0_1964-21runrttasks08:54:260
121340ksoftirqd/1121650irq/29-eth0_g0_08:46:091
121750330irq/30-eth0_g0_2746-21chrt08:26:091
121750330irq/30-eth0_g0_0-21swapper/108:55:511
121650330irq/29-eth0_g0_657-21taskset08:17:210
121650330irq/29-eth0_g0_2109-21lldpd07:28:470
121650320irq/29-eth0_g0_3440-21munin-run08:30:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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