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2026-05-15 - 18:57

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 May 15, 2026 12:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
211255621530,3sleep3451irq_work/307:36:013
22952112660,6chrt0-21swapper/210:40:592
22952112660,6chrt0-21swapper/210:40:592
2081703996557,5cyclictest2153954-21cat08:20:002
2081700996353,8cyclictest2187685-21ntpq08:51:041
21049802600,2sleep0201rcuc/007:30:570
2081700995750,5cyclictest2263578-21/usr/sbin/munin10:11:011
2081698995649,5cyclictest2081562-21kworker/u8:0+flush-8:008:35:540
2081698995649,5cyclictest2081562-21kworker/u8:0+flush-8:008:35:540
2081700995547,6cyclictest2193698-21apt-get09:00:001
2081700995547,6cyclictest2167821-21ntpq08:31:021
2081698995546,6cyclictest2407399-21latency_hist12:35:000
2081698995544,9cyclictest2187640-21ntpq08:51:030
2081698995450,3cyclictest2327688-21kworker/u8:2+events_unbound11:46:070
2081698995449,3cyclictest2347520-21kworker/u8:0+events_unbound11:56:080
2081698995346,5cyclictest2081562-21kworker/u8:0+flush-8:007:20:010
2081700995243,7cyclictest2313370-21/usr/sbin/munin11:01:011
2081698995245,5cyclictest2081562-21kworker/u8:0+flush-8:007:46:060
2081698995244,6cyclictest2038822-21kworker/u8:3+flush-8:007:25:550
2081703995140,8cyclictest2087218-21ntpq07:15:032
2081698995146,4cyclictest2392247-21kworker/u8:2+events_unbound12:20:000
2081698995146,4cyclictest2392247-21kworker/u8:2+events_unbound12:19:590
2081698995143,6cyclictest2252574-21ntpq09:56:030
2081703995040,8cyclictest2238394-21apt-get09:45:002
2081698995043,5cyclictest2268540-21apt-get10:15:500
2081703994941,5cyclictest280-21systemd-journal12:31:062
2081700994943,4cyclictest2347520-21kworker/u8:0+flush-8:011:55:541
24031822480,3sleep10-21swapper/112:30:541
2081703994841,5cyclictest280-21systemd-journal11:40:352
2081703994837,8cyclictest2193698-21apt-get09:00:012
2081700994839,6cyclictest2223545-21latency_hist09:30:011
2081698994841,5cyclictest2082167-21diskstats07:10:540
2081700994741,4cyclictest280-21systemd-journal07:43:351
2081700994640,5cyclictest2183309-21kworker/u8:1+flush-8:011:36:031
2081700994640,4cyclictest2158534-21kworker/u8:2+flush-8:009:35:591
2081703994540,4cyclictest2081562-21kworker/u8:0+flush-8:007:36:062
2081700994537,6cyclictest2318375-21apt-get11:05:491
2081698994536,6cyclictest2352754-21latency_hist11:40:010
2081698994439,3cyclictest2362703-21kworker/u8:3+flush-8:012:06:050
208169899441,40cyclictest1-21systemd08:25:000
21416672430,3sleep375-21kworker/3:1+events08:05:593
2081700994334,6cyclictest2238395-21latency_hist09:45:011
2081700994333,7cyclictest2173657-21latency_hist08:40:011
2081700994333,7cyclictest2173657-21latency_hist08:40:011
2081698994337,4cyclictest2133231-21kworker/u8:3+flush-8:009:05:550
2081698994336,5cyclictest2119075-21latency_hist07:45:010
21961542420,4sleep00-21swapper/009:00:570
2081700994232,7cyclictest2099002-21latency_hist07:25:011
2081698994235,5cyclictest280-21systemd-journal09:49:580
2081698994231,8cyclictest2113191-21ntpq07:36:040
2081698994230,9cyclictest280-21systemd-journal08:00:000
2081700994134,5cyclictest2038822-21kworker/u8:3+flush-8:007:11:071
2081698994136,4cyclictest2133231-21kworker/u8:3+flush-8:010:00:530
2081700994035,4cyclictest2327688-21kworker/u8:2+events_unbound12:05:001
2081700994034,4cyclictest2099310-21apt-get07:25:501
2081698994035,4cyclictest2158534-21kworker/u8:2+flush-8:009:30:580
2081698994028,10cyclictest280-21systemd-journal08:20:000
2081700993931,6cyclictest2273496-21apt-get10:20:481
2081700993931,5cyclictest2392567-21latency_hist12:20:011
2081700993931,5cyclictest2392567-21latency_hist12:20:001
2081700993928,8cyclictest2327083-21ntpq11:11:021
2081698993935,3cyclictest2183309-21kworker/u8:1+flush-8:011:01:050
2081698993930,7cyclictest2401588-21ntpq12:26:030
2081703993832,4cyclictest2133231-21kworker/u8:3+flush-8:009:31:072
2081700993832,4cyclictest280-21systemd-journal08:06:351
2081700993829,6cyclictest2081541-21latency_hist07:10:001
2081698993832,4cyclictest2158534-21kworker/u8:2+flush-8:010:26:070
2081700993730,5cyclictest280-21systemd-journal07:45:361
2081698993733,3cyclictest2327688-21kworker/u8:2+events_unbound11:30:520
2081698993730,5cyclictest2183309-21kworker/u8:1+flush-8:011:21:100
2081698993728,7cyclictest2377485-21latency_hist12:05:010
2081700993629,5cyclictest2153633-21apt-get08:20:001
2081700993626,7cyclictest2263294-21latency_hist10:10:001
2081698993632,2cyclictest2284112-21irqrtprio10:30:560
2081698993626,7cyclictest2347520-21kworker/u8:0+flush-8:012:11:040
2081703993529,4cyclictest2133231-21kworker/u8:3+events_unbound09:00:022
2081700993529,4cyclictest2347520-21kworker/u8:0+flush-8:011:51:101
2081700993528,5cyclictest280-21systemd-journal10:05:001
2081700993527,6cyclictest2283366-21/usr/sbin/munin10:31:011
2081700993526,5cyclictest2327688-21kworker/u8:2+events_unbound11:45:531
2081698993531,3cyclictest2133231-21kworker/u8:3+events_unbound09:51:080
2081698993528,5cyclictest2347520-21kworker/u8:0+events_unbound11:51:060
2081698993528,5cyclictest2183309-21kworker/u8:1+events_unbound10:11:050
2081698993522,9cyclictest280-21systemd-journal08:35:000
2081700993429,4cyclictest2347520-21kworker/u8:0+events_unbound12:11:081
2081700993428,4cyclictest2243893-21apt-get09:50:491
2081700993428,4cyclictest2124291-21apt-get07:50:501
2081698993430,3cyclictest2183309-21kworker/u8:1+events_unbound09:20:580
2081698993429,4cyclictest2038822-21kworker/u8:3+events_unbound07:21:040
2081698993428,4cyclictest2103931-21kworker/u8:1+flush-8:008:03:080
2081698993426,6cyclictest2081562-21kworker/u8:0+flush-8:008:06:040
2081700993329,3cyclictest2327688-21kworker/u8:2+flush-8:011:45:011
2081700993328,3cyclictest2081562-21kworker/u8:0+flush-8:007:30:421
2081700993323,8cyclictest280-21systemd-journal08:01:371
2081698993327,4cyclictest2081562-21kworker/u8:0+flush-8:008:10:530
2081698993323,7cyclictest2219864-21kthreadcore09:25:590
2081700993230,1cyclictest2327688-21kworker/u8:2+flush-8:011:31:081
2081698993227,4cyclictest2283104-21kworker/u8:0+events_unbound10:45:540
2081698993226,4cyclictest2393199-21fschecks_count12:20:550
2081698993226,4cyclictest2183309-21kworker/u8:1+flush-8:010:56:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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