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2026-08-21 - 04:07

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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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  Intel
Click here to display the system's profile data or here to proceed to next system.
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, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Fri Aug 21, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5913721000,2chrt575-21kworker/3:2+events23:22:463
41630752740,2sleep3471rcuc/321:52:453
41351922640,4chrt0-21swapper/121:22:541
3999803996140,18cyclictest4070987-21awk20:20:002
3999800996151,7cyclictest4185534-21latency_hist22:15:011
3999800995749,5cyclictest4070977-21latency_hist20:20:011
3999800995443,8cyclictest275-21systemd-journal00:20:001
3999796995448,4cyclictest3999516-21kworker/u8:1+flush-8:019:20:000
3999803995332,19cyclictest4145710-21awk21:35:002
3999800995141,8cyclictest4090777-21latency_hist20:40:011
3999803995041,7cyclictest36106-21apt-get23:00:002
3999803995041,7cyclictest36106-21apt-get23:00:002
3999796995045,4cyclictest2667878-21kworker/u8:3+flush-8:020:07:530
3999796994539,5cyclictest90304-21kworker/u8:0+events_unbound00:27:440
3999796994539,5cyclictest90304-21kworker/u8:0+events_unbound00:27:440
3999800994438,4cyclictest4007126-21apt-get19:17:351
3999796994436,6cyclictest4051607-21/usr/sbin/munin20:02:540
3999796994237,4cyclictest4080887-21kworker/u8:1+flush-8:020:57:400
3999803994124,14cyclictest131455-21aten2_r5power_e00:37:382
3999796994135,4cyclictest4091253-21kworker/u8:2+flush-8:020:42:400
3999796994133,6cyclictest4036770-21/usr/sbin/munin19:47:470
3999796994031,6cyclictest20621-21ntpq22:42:510
3999803993925,12cyclictest25951-21unixbench_multi22:47:552
3999800993933,4cyclictest4096240-21kworker/u8:0+flush-8:021:32:551
3999796993930,7cyclictest2667878-21kworker/u8:3+flush-8:020:37:560
3999796993929,8cyclictest4135067-21ntpq21:22:500
3999803993820,16cyclictest275-21systemd-journal23:53:192
3999800993833,4cyclictest90304-21kworker/u8:0+flush-8:000:27:451
3999800993833,4cyclictest90304-21kworker/u8:0+flush-8:000:27:451
3999800993831,4cyclictest4041730-21apt-get19:52:351
3999796993834,3cyclictest4096240-21kworker/u8:0+flush-8:021:52:540
3999796993834,3cyclictest36588-21kworker/u8:1+flush-8:023:02:520
3999796993833,3cyclictest4145535-21kworker/u8:2+flush-8:021:42:580
3999796993829,6cyclictest4135638-21kworker/u8:3+flush-8:023:22:530
3999803993731,4cyclictest120867-21gpgv00:25:002
3999803993723,12cyclictest4190437-21cron22:20:002
3999796993729,6cyclictest275-21systemd-journal20:49:420
3999803993629,5cyclictest275-21systemd-journal20:43:192
3999800993631,4cyclictest4080887-21kworker/u8:1+flush-8:020:47:441
3999796993631,4cyclictest4135638-21kworker/u8:3+flush-8:022:17:540
3999796993631,4cyclictest4091253-21kworker/u8:2+flush-8:021:02:460
3999796993630,4cyclictest4080887-21kworker/u8:1+events_unbound20:52:400
3999796993627,6cyclictest4021503-21latency_hist19:30:000
3999796993627,6cyclictest4021503-21latency_hist19:30:000
3999803993521,12cyclictest61848-21aten2_r5power_p23:27:382
3999803993511,11cyclictest0-21swapper/221:27:492
3999800993528,6cyclictest2667878-21kworker/u8:3+flush-8:019:32:551
3999800993526,7cyclictest120143-21ntpq00:22:521
3999796993531,3cyclictest4056349-21kworker/u8:0+flush-8:020:32:520
3999796993530,4cyclictest4096240-21kworker/u8:0+flush-8:021:27:400
3999796993528,5cyclictest4066037-21latency_hist20:15:010
3999796993528,5cyclictest101218-21kworker/u8:3+flush-8:000:35:000
3999796993526,7cyclictest4166441-21diskstats21:57:400
3999796993525,8cyclictest90276-21ntpq23:52:490
39994302353,9sleep10-21swapper/119:09:401
41318892340,6sleep3451irq_work/321:22:443
3999800993425,7cyclictest4085123-21ntpq20:32:491
3999796993430,3cyclictest4135638-21kworker/u8:3+flush-8:022:52:470
3999796993430,3cyclictest4135638-21kworker/u8:3+flush-8:022:52:470
3999796993424,9cyclictest4070979-21munin-plugin-st20:20:000
33642340,2sleep0201rcuc/022:27:460
399980399332,26cyclictest4077268-21ps20:27:432
399980399332,23cyclictest4176082-21apt-get22:07:362
399980399331,29cyclictest20660-21/usr/sbin/munin22:42:522
3999800993328,3cyclictest57318-21irqrtprio23:22:441
3999800993324,7cyclictest4120312-21ntpq21:07:501
3999800993324,7cyclictest4120312-21ntpq21:07:501
3999800993323,8cyclictest4030658-21ntpq19:37:471
3999796993330,1cyclictest51186-21latency_hist23:15:010
3999796993330,1cyclictest4096240-21kworker/u8:0+flush-8:021:33:010
3999796993329,3cyclictest4056349-21kworker/u8:0+flush-8:020:22:520
3999796993327,4cyclictest4056349-21kworker/u8:0+flush-8:020:27:450
3999796993327,4cyclictest36588-21kworker/u8:1+flush-8:023:27:550
3999796993327,4cyclictest101218-21kworker/u8:3+flush-8:000:22:460
3999796993325,6cyclictest4121743-21fschecks_time21:12:400
3999796993323,7cyclictest275-21systemd-journal19:35:000
399980399324,22cyclictest4126368-21apt-get21:17:362
3999803993215,15cyclictest4085594-21unixbench_multi20:32:552
399980399321,23cyclictest4031884-21apt-get19:42:342
3999800993226,4cyclictest90304-21kworker/u8:0+flush-8:023:52:551
3999800993224,6cyclictest45517-21ntpq23:07:501
3999796993227,3cyclictest4146866-21irqrtprio21:37:440
3999796993225,5cyclictest4156583-21grep21:47:400
3999796993224,6cyclictest26213-21latency_hist22:50:000
399979699320,29cyclictest56172-21munin-run23:20:010
399980399313,20cyclictest4101363-21apt-get20:52:372
3999803993116,12cyclictest108556-21kthreadcore00:12:482
3999803993111,18cyclictest4150778-21cp21:40:012
399980399310,26cyclictest4150662-21apt-get21:40:032
3999796993125,4cyclictest4025960-21kworker/u8:0+events_unbound19:37:410
3999796993124,4cyclictest4096240-21kworker/u8:0+flush-8:021:17:430
3999796993123,6cyclictest4000190-21munin-node19:12:360
3999803993026,2cyclictest4007212-21aten2_r5power_p19:17:372
399980399302,21cyclictest4181028-21apt-get22:12:382
3999803993018,10cyclictest46946-21fschecks_count23:12:402
3999803993014,14cyclictest275-21systemd-journal23:23:192
399980399300,28cyclictest4170723-21seq22:00:012
3999800993026,2cyclictest35311-21needreboot22:57:471
3999800993026,2cyclictest35311-21needreboot22:57:471
3999800993025,3cyclictest4091253-21kworker/u8:2+flush-8:021:02:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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