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2026-06-05 - 19:42

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 Jun 05, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
200803522420,3sleep375-21kworker/3:1-events08:00:023
222576222200,3sleep375-21kworker/3:1+events11:35:553
22516282850,5chrt0-21swapper/212:05:352
19708672830,5chrt0-21swapper/107:20:421
21163242660,8chrt75-21kworker/3:1+mm_percpu_wq09:45:523
1956199995849,7cyclictest1704890-21systemd-journal07:40:001
21835202530,3chrt75-21kworker/3:1+events10:55:423
1956201995347,5cyclictest1926790-21kworker/u8:1+flush-8:008:20:512
1956199995245,5cyclictest2012798-21kworker/u8:2+flush-8:008:15:491
1956199995243,7cyclictest2091199-21ntpq09:20:471
1956199995141,7cyclictest2185627-21ntpq10:55:471
1956201995044,4cyclictest2181482-21kworker/u8:2+events_unbound12:00:512
1956199995040,8cyclictest2051795-21ntpq08:40:511
1956201994943,5cyclictest1926790-21kworker/u8:1+events_unbound07:15:522
1956201994843,4cyclictest2165866-21kworker/u8:3+events_unbound12:30:472
1956199994839,7cyclictest1991891-21ntpq07:40:491
1956201994742,3cyclictest1967587-21kworker/u8:0+flush-8:007:30:522
1956201994742,3cyclictest1967587-21kworker/u8:0+flush-8:007:30:522
1956197994738,7cyclictest2136611-21latency_hist10:10:000
1956201994641,4cyclictest1997951-21kworker/u8:0+flush-8:010:00:522
1956201994640,4cyclictest1973188-21kworker/u8:2+events_unbound07:35:382
1956199994636,7cyclictest2062460-21latency_hist08:55:011
1956197994640,4cyclictest2186479-21kworker/u8:0+flush-8:011:00:370
1956199994539,4cyclictest2013066-21apt-get08:05:311
1956199994538,5cyclictest2195490-21ntpq11:05:451
1956201994439,4cyclictest1983055-21kworker/u8:3+flush-8:007:45:002
1956199994438,5cyclictest1997951-21kworker/u8:0+flush-8:009:40:361
1956199994433,8cyclictest2081407-21ntpq09:10:471
1956199994430,9cyclictest1704890-21systemd-journal10:54:491
1956199994337,5cyclictest2114521-21kworker/u8:3+events_unbound09:45:511
1956199994333,8cyclictest1967035-21ntpq07:15:471
1956197994334,6cyclictest1704890-21systemd-journal10:15:500
1956197994332,8cyclictest2086281-21ntpq09:15:450
1956197994332,8cyclictest2086281-21ntpq09:15:450
1956201994238,3cyclictest2181482-21kworker/u8:2+flush-8:011:20:512
1956201994238,3cyclictest1973188-21kworker/u8:2+flush-8:007:45:462
1956199994233,7cyclictest2036816-21ntpq08:25:471
1956197994234,6cyclictest2265020-21ntpq12:15:460
1956197994234,6cyclictest2013041-21/usr/sbin/munin08:05:450
1956197994231,9cyclictest2023439-21diskstats08:15:350
1956201994137,3cyclictest1997951-21kworker/u8:0+flush-8:009:55:452
1956201994035,3cyclictest1997951-21kworker/u8:0+events_unbound09:30:412
1956201994031,7cyclictest1704890-21systemd-journal12:38:502
1956199994035,4cyclictest2012798-21kworker/u8:2+flush-8:008:30:381
1956197994036,3cyclictest2012798-21kworker/u8:2+events_unbound09:45:360
1956197994030,8cyclictest1981975-21ntpq07:30:490
1956197994030,8cyclictest1981975-21ntpq07:30:490
22838762390,6sleep3451irq_work/312:35:423
21938942390,3sleep00-21swapper/011:05:420
1956199993931,6cyclictest1997951-21kworker/u8:0+flush-8:010:05:481
1956199993927,7cyclictest1704890-21systemd-journal10:26:481
1956199993833,4cyclictest2186479-21kworker/u8:0+flush-8:011:35:541
1956199993832,4cyclictest2271139-21kworker/u8:0+flush-8:012:35:511
1956197993832,4cyclictest2165866-21kworker/u8:3+flush-8:010:59:590
1956197993831,5cyclictest2162052-21apt-get10:35:320
1956201993730,5cyclictest2221183-21turbostat.cron11:35:012
1956201993727,8cyclictest2141773-21awk10:14:592
1956199993730,5cyclictest1704890-21systemd-journal12:31:491
1956199993728,7cyclictest2120890-21ntpq09:50:451
1956199993728,6cyclictest2146716-21latency_hist10:20:011
1956199993728,6cyclictest2076416-21ntpq09:05:451
1956197993732,4cyclictest1926790-21kworker/u8:1+flush-8:007:10:500
1956197993728,6cyclictest2181551-21latency_hist10:55:010
1956199993628,6cyclictest2097045-21kworker/u8:1+events_unbound09:35:331
1956199993623,10cyclictest1704890-21systemd-journal07:51:501
1956197993629,5cyclictest1983055-21kworker/u8:3+flush-8:007:40:550
19560102363,9sleep10-21swapper/107:09:561
1956201993531,3cyclictest2181482-21kworker/u8:2+events_unbound11:10:002
1956199993531,2cyclictest2256058-21systemd-run12:10:011
1956199993530,4cyclictest1967587-21kworker/u8:0+flush-8:007:30:541
1956199993530,4cyclictest1967587-21kworker/u8:0+flush-8:007:30:531
19570992340,1sleep21957101-21grep07:10:412
1956199993430,3cyclictest2271139-21kworker/u8:0+events_unbound12:25:331
1956199993429,4cyclictest2114521-21kworker/u8:3+events_unbound10:10:361
1956199993429,4cyclictest1926790-21kworker/u8:1+events_unbound07:10:521
1956199993427,5cyclictest2181482-21kworker/u8:2+flush-8:012:00:461
1956197993429,4cyclictest2012798-21kworker/u8:2+flush-8:008:25:510
195619799340,30cyclictest1-21systemd07:40:000
1956201993324,7cyclictest2171700-21awk10:45:002
1956201993323,8cyclictest2236026-21awk11:50:012
1956199993327,4cyclictest1997951-21kworker/u8:0+flush-8:009:25:521
1956199993327,4cyclictest1994001-21kthreadcore07:45:401
1956199993326,5cyclictest2042386-21kworker/u8:3+flush-8:009:15:361
1956199993326,5cyclictest2042386-21kworker/u8:3+flush-8:009:15:361
1956199993324,6cyclictest2018023-21apt-get08:10:331
1956197993328,4cyclictest1997951-21kworker/u8:0+flush-8:008:35:500
1956199993228,3cyclictest2181482-21kworker/u8:2+flush-8:011:25:511
1956199993228,3cyclictest1983055-21kworker/u8:3+flush-8:007:55:541
1956199993228,2cyclictest2042386-21kworker/u8:3+events_unbound08:55:421
1956199993226,5cyclictest2157040-21kworker/u8:1+events_unbound10:35:481
1956199993225,5cyclictest2206595-21apt-get11:20:321
1956199993225,5cyclictest1967587-21kworker/u8:0+flush-8:007:25:531
1956197993228,3cyclictest2165866-21kworker/u8:3+flush-8:010:45:500
1956197993227,4cyclictest1997951-21kworker/u8:0+flush-8:009:10:510
1956197993226,4cyclictest1983055-21kworker/u8:3+flush-8:007:51:210
1956197993222,8cyclictest2246382-21/usr/sbin/munin12:00:430
19553872322,26sleep20-21swapper/207:05:512
1956201993125,4cyclictest1704890-21systemd-journal10:20:002
1956199993127,3cyclictest2172912-21kthreadcore10:45:401
1956199993127,3cyclictest2165866-21kworker/u8:3+events_unbound11:55:491
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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