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2026-06-21 - 11:27

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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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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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack2slot7s.osadl.org (updated Sun Jun 21, 2026 00:43:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2323946996655,6cyclictest0-21swapper/223:00:352
2323945996053,4cyclictest2453961-21modprobe23:40:301
2323946995140,7cyclictest2412673-21cut22:35:012
2323946995140,7cyclictest2412673-21cut22:35:012
2323944994942,4cyclictest2344938-21basename20:20:010
2323945994739,5cyclictest2334439-21munin-run19:45:001
2323946994636,6cyclictest1-21systemd23:35:012
2323946994535,6cyclictest2422894-21needreboot22:50:272
2323946994437,3cyclictest0-21swapper/221:45:322
2323945994436,5cyclictest2349445-21systemd-run20:35:011
2323945994435,6cyclictest2326935-21sendmail19:20:011
232394699433,31cyclictest2444787-21ssh23:25:362
232394699433,31cyclictest2444787-21ssh23:25:362
2323945994234,5cyclictest2477638-21sendmail00:20:011
2323945994234,5cyclictest2366245-21latency_hist21:20:021
2323945994134,4cyclictest2400908-21gltestperf22:15:231
2323945994131,6cyclictest420-21avahi-daemon22:14:501
2323945994131,6cyclictest420-21avahi-daemon21:36:381
2323945994131,6cyclictest2329957-21systemd-run19:30:011
232394499413,32cyclictest2453916-21ssh23:40:280
2323944994123,12cyclictest151ktimers/023:15:310
2323946994033,4cyclictest2455975-21ssh23:45:012
2323944994033,5cyclictest2465301-21munin-run00:00:020
2323946993933,3cyclictest0-21swapper/221:35:192
2323945993932,4cyclictest0-21swapper/123:05:401
2323945993931,5cyclictest1002-21mta-sts-daemon21:42:421
2323944993932,5cyclictest2449815-21systemd-run23:35:010
232394699383,29cyclictest2441657-21ssh23:20:332
232394699383,29cyclictest2441657-21ssh23:20:332
2323946993830,5cyclictest2421977-21true22:50:012
2323946993830,3cyclictest0-21swapper/221:15:302
2323946993825,9cyclictest2361396-21timerandwakeup21:10:422
2323945993832,3cyclictest0-21swapper/121:30:011
2323945993830,5cyclictest2449868-21latency_hist23:35:021
2323946993731,3cyclictest0-21swapper/221:25:012
2323946993731,3cyclictest0-21swapper/200:00:022
2323946993730,4cyclictest0-21swapper/200:40:002
2323946993730,3cyclictest0-21swapper/200:35:012
2323946993730,3cyclictest0-21swapper/200:35:012
2323946993729,5cyclictest2353933-21munin-plugin-st20:50:002
2323946993729,5cyclictest2353933-21munin-plugin-st20:50:002
2323946993729,4cyclictest0-21swapper/222:40:412
2323946993726,7cyclictest2465353-21cups-browsed00:01:422
232394699371,31cyclictest2469512-21sh00:05:362
2323945993728,6cyclictest420-21avahi-daemon22:05:021
2323945993728,6cyclictest1001-21mta-sts-daemon22:51:571
232394599372,28cyclictest2373528-21ssh21:30:331
2323944993723,9cyclictest12650irq/32-eth022:15:350
2323946993628,5cyclictest2341926-21cron20:10:012
2323946993627,5cyclictest2403332-21idleruntime-cro22:20:012
2323946993626,6cyclictest561985-21cups-browsed22:10:592
2323946993625,7cyclictest421-21dbus-daemon20:00:312
232394699362,24cyclictest2472523-21ssh00:10:352
2323945993630,3cyclictest0-21swapper/100:35:311
2323945993629,4cyclictest2334415-21kworker/u8:5-rpciod21:10:031
2323945993629,3cyclictest0-21swapper/100:00:011
2323945993627,6cyclictest561985-21cups-browsed21:12:331
2323945993620,11cyclictest271ktimers/123:35:261
2323944993628,5cyclictest420-21avahi-daemon21:43:360
2323944993627,7cyclictest2366146-21sh21:20:000
2323944993622,10cyclictest12650irq/32-eth021:10:320
2323946993527,5cyclictest2415797-21systemd-run22:40:012
2323945993527,5cyclictest0-21swapper/119:40:011
2323945993527,5cyclictest0-21swapper/119:40:011
2323945993527,4cyclictest0-21swapper/100:30:291
2323945993527,4cyclictest0-21swapper/100:30:291
2323945993526,5cyclictest1000-21mta-sts-daemon21:55:331
2323944993529,4cyclictest2332857-21sed19:35:410
2323944993529,4cyclictest2332857-21sed19:35:410
2323944993528,4cyclictest2394133-21systemd-run22:05:010
2323944993527,4cyclictest0-21swapper/023:00:010
2323944993525,7cyclictest2441347-21latency23:20:240
2323944993525,7cyclictest2441347-21latency23:20:240
232394499352,26cyclictest2389010-21ssh21:55:320
2323944993514,15cyclictest561985-21cups-browsed19:15:310
232394699343,25cyclictest561985-21cups-browsed23:10:292
2323946993426,5cyclictest2437742-21/usr/sbin/munin23:15:412
2323946993426,5cyclictest2326836-21unixbench_singl19:15:402
2323946993426,3cyclictest0-21swapper/219:20:282
2323946993424,7cyclictest2450799-21ntp_kernel_pll_23:35:282
2323945993428,3cyclictest0-21swapper/120:20:011
2323945993427,4cyclictest2414203-21unixbench-2d22:35:401
2323945993427,4cyclictest1002-21mta-sts-daemon20:50:431
2323945993427,4cyclictest0-21swapper/121:50:301
2323945993427,3cyclictest0-21swapper/122:45:311
2323945993426,5cyclictest2358440-21munin-plugin-st21:05:001
2323945993425,5cyclictest439-21systemd-logind23:55:011
2323945993423,8cyclictest2347280-21ntp_kernel_err20:25:281
232394499343,24cyclictest665-21snmpd22:05:320
2323944993426,5cyclictest420-21avahi-daemon23:00:350
2323944993426,4cyclictest0-21swapper/000:00:290
2323944993423,8cyclictest2370268-21ssh21:25:280
2323944993417,12cyclictest12650irq/32-eth000:30:290
2323944993417,12cyclictest12650irq/32-eth000:30:290
2323944993411,17cyclictest2422945-21ssh22:50:290
2323946993325,5cyclictest2425798-21sh22:55:252
2323946993325,3cyclictest0-21swapper/221:55:322
2323945993327,3cyclictest0-21swapper/100:10:011
2323945993325,5cyclictest2480915-21latency_hist00:25:031
2323945993325,5cyclictest2334948-21fschecks_count19:45:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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