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2026-06-28 - 20:41

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 28, 2026 12:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3931383997030,18cyclictest12650irq/32-eth009:30:300
3931385994436,5cyclictest3985843-21munin-run09:40:012
3931384994437,3cyclictest0-21swapper/110:05:311
3931383994437,5cyclictest3992898-21needreboot09:50:290
3931383994429,13cyclictest3964404-21latency_hist09:00:020
3931385994334,6cyclictest421-21dbus-daemon08:05:012
3931384994332,7cyclictest3127484-21cups-browsed12:15:231
393138399431,36cyclictest4062860-21ssh11:45:350
3931385994233,6cyclictest421-21dbus-daemon11:31:492
3931383994236,4cyclictest4001159-21systemd-run10:05:020
3931383994232,8cyclictest3941879-21idleruntime-cro07:45:010
3931385994131,7cyclictest4092876-21missed_timers12:35:292
3931384994130,8cyclictest4048404-21sshd11:21:011
3931383994121,15cyclictest12650irq/32-eth012:05:330
3931385994034,3cyclictest0-21swapper/211:25:362
3931385994034,2cyclictest0-21swapper/210:00:012
3931385994032,4cyclictest4046640-21sendmail11:20:012
3931384994033,4cyclictest4025440-21idleruntime-cro10:45:011
3931383994019,14cyclictest12650irq/32-eth011:15:360
3931383994017,15cyclictest12650irq/32-eth009:15:430
3931385993934,2cyclictest0-21swapper/210:40:332
3931385993933,3cyclictest0-21swapper/212:00:262
3931385993930,5cyclictest4079892-21grep12:15:012
3931385993930,5cyclictest1003-21mta-sts-daemon10:19:582
3931385993928,7cyclictest4047638-21ntp_kernel_err11:20:312
3931384993931,5cyclictest1-21systemd12:35:011
3931383993929,8cyclictest4083767-21latency12:20:260
3931384993830,5cyclictest4070834-21idleruntime-cro12:00:011
3931384993830,4cyclictest0-21swapper/111:40:371
3931384993827,7cyclictest421-21dbus-daemon11:35:021
3931383993829,4cyclictest0-21swapper/012:30:320
3931385993730,4cyclictest4031557-21latency_hist10:55:022
3931385993730,3cyclictest0-21swapper/211:05:362
3931385993730,3cyclictest0-21swapper/209:45:202
3931384993730,4cyclictest4085956-21cron12:25:011
3931384993730,4cyclictest3991964-21/usr/sbin/munin09:50:011
3931384993729,5cyclictest4029880-21timerandwakeup10:50:421
3931384993728,6cyclictest3976764-21latency_hist09:25:021
3931384993728,6cyclictest3127484-21cups-browsed09:12:261
3931384993727,7cyclictest4017714-21switchtime10:30:431
3931384993727,6cyclictest0-21swapper/108:30:361
3931383993730,4cyclictest1002-21mta-sts-daemon11:20:380
3931383993729,5cyclictest4078142-21sendmail_mailst12:10:410
3931383993725,9cyclictest4019375-21munin-plugin-st10:35:010
3931385993630,3cyclictest0-21swapper/210:00:342
3931385993630,3cyclictest0-21swapper/209:25:262
3931385993630,3cyclictest0-21swapper/209:20:012
3931385993628,5cyclictest4037553-21munin-plugin-st11:05:002
3931385993628,5cyclictest4037553-21munin-plugin-st11:05:002
3931385993628,5cyclictest4028466-21cut10:50:012
3931385993628,5cyclictest3974336-21latency09:20:272
3931385993628,5cyclictest3940371-21systemctl07:40:012
3931385993627,6cyclictest420-21avahi-daemon10:55:412
3931385993627,6cyclictest1-21systemd11:40:022
3931385993624,8cyclictest421-21dbus-daemon09:12:042
3931384993629,4cyclictest4079880-21ssh12:15:011
3931384993629,3cyclictest0-21swapper/111:55:011
3931384993628,5cyclictest4095045-21basename12:40:011
3931384993628,5cyclictest4076870-21latency_hist12:10:011
3931384993628,5cyclictest3958366-21cut08:40:011
3931384993628,4cyclictest0-21swapper/109:15:361
3931383993626,7cyclictest0-21swapper/012:00:010
3931383993626,5cyclictest151ktimers/008:00:300
3931385993529,3cyclictest0-21swapper/210:35:322
3931385993529,3cyclictest0-21swapper/210:30:372
3931385993528,3cyclictest0-21swapper/211:40:412
3931385993528,3cyclictest0-21swapper/210:05:392
3931385993527,5cyclictest3967367-21diskmemload11:50:212
3931385993525,6cyclictest3127484-21cups-browsed12:20:102
3931385993524,6cyclictest485-21in:imuxsock07:45:012
393138499353,26cyclictest3986942-21ssh09:40:391
3931384993526,4cyclictest0-21swapper/110:55:311
3931383993528,4cyclictest4057301-21unixbench_multi11:35:440
3931385993427,3cyclictest0-21swapper/209:40:382
3931385993426,5cyclictest3948413-21fschecks_time08:05:252
3931385993425,5cyclictest3995030-21systemd-run09:55:012
3931385993425,5cyclictest3942393-21grep07:45:252
3931385993425,5cyclictest3942393-21grep07:45:252
393138499343,25cyclictest4071831-21ssh12:00:321
3931384993426,3cyclictest0-21swapper/112:25:371
3931384993425,6cyclictest627-21lldpd09:31:421
3931384993423,8cyclictest421-21dbus-daemon08:10:021
393138499341,26cyclictest3939836-21sshd07:35:361
393138399343,23cyclictest3974599-21ssh09:20:330
3931383993428,4cyclictest4061755-21cron11:45:010
3931383993428,4cyclictest3968807-21threads09:10:440
3931383993427,5cyclictest3957390-21fschecks_count08:35:300
3931385993327,3cyclictest0-21swapper/212:20:012
3931385993327,3cyclictest0-21swapper/209:30:372
3931385993326,4cyclictest4074522-21gltestperf12:05:262
3931385993325,5cyclictest3959821-21unixbench_singl08:40:442
3931384993326,4cyclictest4064784-21munin-plugin-st11:50:011
3931384993326,3cyclictest0-21swapper/111:15:321
393138499331,26cyclictest4050907-21diskmemload11:25:401
3931383993327,4cyclictest4007286-21latency_hist10:15:020
3931383993327,3cyclictest0-21swapper/012:01:350
3931383993326,4cyclictest1001-21mta-sts-daemon11:30:420
3931383993324,6cyclictest421-21dbus-daemon10:54:130
3931383993318,10cyclictest151ktimers/008:10:330
3931385993226,3cyclictest3934615-21kworker/u8:7-rpciod09:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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