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2025-11-25 - 11:40

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 Tue Nov 25, 2025 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7432870sleep1121750irq/30-eth0_g0_21:24:541
121780ksoftirqd/1121750irq/30-eth0_g0_19:04:581
13162750sleep1121750irq/30-eth0_g0_23:39:521
63292670sleep1121750irq/30-eth0_g0_23:59:551
63292670sleep1121750irq/30-eth0_g0_23:59:551
121630ksoftirqd/194322chrt00:12:000
121590ksoftirqd/1121750irq/30-eth0_g0_23:15:030
121580ksoftirqd/1121750irq/30-eth0_g0_21:21:481
121570ksoftirqd/1288222sleep023:19:510
121650490irq/29-eth0_g0_31ksoftirqd/000:34:570
121480ksoftirqd/1121750irq/30-eth0_g0_21:51:371
315272460sleep1121750irq/30-eth0_g0_23:29:581
121750460irq/30-eth0_g0_1219-21kworker/1:223:46:291
121460ksoftirqd/1121750irq/30-eth0_g0_21:30:501
121460ksoftirqd/1121750irq/30-eth0_g0_21:30:501
121460ksoftirqd/1121750irq/30-eth0_g0_00:29:111
121460ksoftirqd/1121750irq/30-eth0_g0_00:14:471
121650450irq/29-eth0_g0_31ksoftirqd/023:44:590
121750440irq/30-eth0_g0_1219-21kworker/1:221:19:251
121650440irq/29-eth0_g0_13-21kworker/0:122:57:490
121440ksoftirqd/1121650irq/29-eth0_g0_21:21:240
121430ksoftirqd/1121750irq/30-eth0_g0_22:35:241
121430ksoftirqd/1121750irq/30-eth0_g0_21:13:311
121750420irq/30-eth0_g0_1219-21kworker/1:223:27:071
121650420irq/29-eth0_g0_1894-21runrttasks23:35:470
121650410irq/29-eth0_g0_31729-21unixbench_multi19:05:030
121650410irq/29-eth0_g0_31ksoftirqd/021:52:400
121650410irq/29-eth0_g0_29932-21cpu23:24:510
121650410irq/29-eth0_g0_20008-21runrttasks22:44:140
121650410irq/29-eth0_g0_1894-21runrttasks21:14:250
3224799401cyclictest11062-21grep22:05:021
121750400irq/30-eth0_g0_1219-21kworker/1:222:02:041
121650400irq/29-eth0_g0_3224699cyclictest22:01:440
121650400irq/29-eth0_g0_21411-21chrt22:49:500
121650400irq/29-eth0_g0_13-21kworker/0:123:32:380
121650400irq/29-eth0_g0_13-21kworker/0:122:15:500
121650400irq/29-eth0_g0_13-21kworker/0:122:10:430
121650400irq/29-eth0_g0_13-21kworker/0:122:10:430
121650400irq/29-eth0_g0_13-21kworker/0:100:26:360
121650400irq/29-eth0_g0_13-21kworker/0:100:06:120
121650400irq/29-eth0_g0_121ksoftirqd/120:49:591
121650400irq/29-eth0_g0_121ksoftirqd/100:01:240
121650400irq/29-eth0_g0_121ksoftirqd/100:01:240
121650400irq/29-eth0_g0_0-21swapper/022:47:060
121400ksoftirqd/1121750irq/30-eth0_g0_21:46:090
3224799396cyclictest8913-21awk19:44:581
32247993934cyclictest4349-21uptime23:50:031
13672390chrt121650irq/29-eth0_g0_21:26:000
121750390irq/30-eth0_g0_1219-21kworker/1:222:30:071
121750390irq/30-eth0_g0_1219-21kworker/1:221:55:291
121750390irq/30-eth0_g0_1219-21kworker/1:221:48:111
121750390irq/30-eth0_g0_1219-21kworker/1:200:32:481
121750390irq/30-eth0_g0_121ksoftirqd/122:23:221
121750390irq/30-eth0_g0_121ksoftirqd/122:14:521
121750390irq/30-eth0_g0_121ksoftirqd/121:36:331
121650390irq/29-eth0_g0_29201-21diskmemload22:24:350
121650390irq/29-eth0_g0_28696-21unixbench_multi21:05:020
121650390irq/29-eth0_g0_1894-21runrttasks20:59:240
121650390irq/29-eth0_g0_13-21kworker/0:123:57:500
121650390irq/29-eth0_g0_13-21kworker/0:123:10:350
121650390irq/29-eth0_g0_13-21kworker/0:123:08:010
121650390irq/29-eth0_g0_13-21kworker/0:123:03:320
121650390irq/29-eth0_g0_13-21kworker/0:123:03:320
121650390irq/29-eth0_g0_13-21kworker/0:122:29:360
121650390irq/29-eth0_g0_13-21kworker/0:121:31:040
121650390irq/29-eth0_g0_13-21kworker/0:121:31:040
121650390irq/29-eth0_g0_10148-21ntp_kernel_pll_00:14:580
121650390irq/29-eth0_g0_0-21swapper/023:50:090
121390ksoftirqd/1121650irq/29-eth0_g0_22:24:581
121390ksoftirqd/1121650irq/29-eth0_g0_19:24:581
3224799382cyclictest32505-21df_inode19:09:531
3224799381cyclictest15321-21grep00:35:011
121750380irq/30-eth0_g0_1219-21kworker/1:222:47:001
121750380irq/30-eth0_g0_121ksoftirqd/123:10:181
121750380irq/30-eth0_g0_121ksoftirqd/122:55:161
121750380irq/30-eth0_g0_121ksoftirqd/122:50:401
121750380irq/30-eth0_g0_0-21swapper/100:20:191
121650380irq/29-eth0_g0_9044-21/usr/sbin/munin19:45:000
121650380irq/29-eth0_g0_7206-21latency_hist19:39:400
121650380irq/29-eth0_g0_31ksoftirqd/022:04:590
121650380irq/29-eth0_g0_17736-21grep20:20:040
121650380irq/29-eth0_g0_17488-21chrt22:33:240
121650380irq/29-eth0_g0_13-21kworker/0:121:54:590
121650380irq/29-eth0_g0_13-21kworker/0:121:35:290
3224799372cyclictest29201-21diskmemload22:11:061
3224799372cyclictest29201-21diskmemload22:11:061
3224799372cyclictest1913-21/usr/sbin/munin20:01:051
3224799371cyclictest659-21vmstat23:35:051
3224799371cyclictest6029-21sort23:59:401
3224799371cyclictest29201-21diskmemload23:14:521
3224799371cyclictest12084-21wc19:59:401
121750370irq/30-eth0_g0_1219-21kworker/1:223:23:021
121750370irq/30-eth0_g0_1219-21kworker/1:223:00:031
121750370irq/30-eth0_g0_1219-21kworker/1:223:00:031
121750370irq/30-eth0_g0_1219-21kworker/1:222:40:221
121750370irq/30-eth0_g0_0-21swapper/121:41:371
121750370irq/30-eth0_g0_0-21swapper/100:05:201
121650370irq/29-eth0_g0_1894-21runrttasks21:15:080
121650370irq/29-eth0_g0_1894-21runrttasks20:08:120
121650370irq/29-eth0_g0_1894-21runrttasks19:39:550
121650370irq/29-eth0_g0_1894-21runrttasks00:30:210
121650370irq/29-eth0_g0_15751-21cat20:14:400
121650370irq/29-eth0_g0_13-21kworker/0:100:21:010
121650370irq/29-eth0_g0_121ksoftirqd/121:41:250
121650370irq/29-eth0_g0_0-21swapper/023:39:530
3224799362cyclictest20203-21grep20:30:021
3224799361cyclictest6316-21sort19:34:571
3224799361cyclictest5502-21grep19:30:031
3224799361cyclictest27480-21grep21:00:011
3224799361cyclictest26770-21cut20:59:401
3224799361cyclictest25663-21tail23:05:011
3224799361cyclictest16068-21interrupts20:14:561
3224799361cyclictest151412sleep120:09:591
121750360irq/30-eth0_g0_1219-21kworker/1:200:11:041
121650360irq/29-eth0_g0_18983-21grep20:25:020
121650360irq/29-eth0_g0_1894-21runrttasks20:48:360
121650360irq/29-eth0_g0_1894-21runrttasks20:48:360
121650360irq/29-eth0_g0_1894-21runrttasks20:38:540
121650360irq/29-eth0_g0_1894-21runrttasks20:01:400
121650360irq/29-eth0_g0_1894-21runrttasks19:25:500
121650360irq/29-eth0_g0_13-21kworker/0:122:36:100
121650360irq/29-eth0_g0_11250-21sort19:54:540
3224799352cyclictest23116-21sort20:44:411
3224799351cyclictest2697-21cat19:19:561
3224799351cyclictest23736-21sendmail_mailtr20:45:011
3224799351cyclictest23736-21sendmail_mailtr20:45:011
3224799351cyclictest21362-21grep20:35:011
3224799351cyclictest17353-21memory20:19:571
3224799351cyclictest0-21swapper/120:28:211
121650350irq/29-eth0_g0_1894-21runrttasks20:30:550
121650350irq/29-eth0_g0_1894-21runrttasks19:51:490
121650350irq/29-eth0_g0_15902-21/usr/sbin/munin20:14:540
121350ksoftirqd/1121650irq/29-eth0_g0_19:49:591
3224799341cyclictest7705-21awk19:40:001
121650340irq/29-eth0_g0_632-21/usr/sbin/munin19:10:030
121650340irq/29-eth0_g0_2910-21find19:20:000
121650340irq/29-eth0_g0_22016-21df_abs20:39:520
121650340irq/29-eth0_g0_1894-21runrttasks21:02:060
121650340irq/29-eth0_g0_1270-21df_abs19:14:520
3224799331cyclictest28535-21proc_pri21:04:591
3224799331cyclictest13770-21awk20:04:561
121650330irq/29-eth0_g0_1894-21runrttasks20:49:530
121650330irq/29-eth0_g0_1894-21runrttasks19:16:511
121650320irq/29-eth0_g0_0-21swapper/019:29:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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