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2026-04-17 - 07:48

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 Fri Apr 17, 2026 00:43:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3173563998068,9cyclictest3313198-21awk23:20:001
3173563998068,9cyclictest3313198-21awk23:20:001
3173562996454,7cyclictest420-21avahi-daemon22:30:440
3173563996047,10cyclictest421-21dbus-daemon21:05:011
3173564995946,8cyclictest3217494-21run-parts21:20:002
3173564995946,8cyclictest3217494-21run-parts21:20:002
3173562995929,20cyclictest12350irq/32-eth021:25:340
3173562995135,10cyclictest12350irq/32-eth022:05:390
3173563995039,6cyclictest3205050-21systemd-run20:55:011
3173564994937,9cyclictest421-21dbus-daemon22:00:492
3173563994940,5cyclictest3357393-21systemd-run00:15:021
3173563994938,6cyclictest0-21swapper/122:45:371
317356399483,34cyclictest3322572-21ssh23:30:421
3173563994812,6cyclictest0-21swapper/120:30:391
3173563994736,7cyclictest3258613-21sendmail_mailqu22:10:501
3173563994636,5cyclictest3173567-21systemd-run19:10:011
3173563994634,8cyclictest420-21avahi-daemon21:45:011
317356399463,33cyclictest3338632-21ssh23:50:461
317356399462,37cyclictest3302401-21ssh23:05:401
3173564994538,3cyclictest0-21swapper/222:35:392
3173563994533,6cyclictest0-21swapper/122:00:381
3173563994528,7cyclictest3261637-21aten_r2power_cu22:15:281
3173563994528,7cyclictest3261637-21aten_r2power_cu22:15:281
3173562994540,3cyclictest0-21swapper/021:10:310
3173564994435,6cyclictest421-21dbus-daemon23:15:012
3173563994435,6cyclictest1-21systemd23:30:021
3173562994437,4cyclictest3305321-21latency_hist23:10:020
3173564994336,4cyclictest3301163-21grep23:05:012
3173563994335,5cyclictest3184168-21latency_hist19:45:021
3173562994326,14cyclictest0-21swapper/021:20:000
3173562994326,14cyclictest0-21swapper/021:20:000
3173564994232,5cyclictest0-21swapper/222:55:432
3173564994229,10cyclictest3358927-21switchtime00:15:492
3173564994229,10cyclictest3358927-21switchtime00:15:492
3173563994134,3cyclictest0-21swapper/122:35:381
3173563994132,6cyclictest3345300-21cupsd00:00:001
3173562994135,4cyclictest3290538-21sendmail_mailqu22:50:450
3173564994031,6cyclictest428-21mta-sts-daemon00:10:452
3173564994031,5cyclictest0-21swapper/200:30:402
3173564994030,7cyclictest3270224-21needreboot22:25:412
3173563994028,9cyclictest3233411-21grep21:40:021
3173562994026,12cyclictest3345299-40systemctl00:00:000
317356499394,26cyclictest3246417-21ssh21:55:412
3173564993930,6cyclictest3255020-21unixbench_singl22:05:492
3173564993928,6cyclictest0-21swapper/223:25:402
317356499391,31cyclictest3258436-21ssh22:10:452
3173563993930,6cyclictest3365377-21ssh00:25:001
3173563993930,5cyclictest3190057-21munin-plugin-st20:05:001
3173563993929,7cyclictest3184723-21latency19:45:341
3173563993928,7cyclictest3374197-21fschecks_time00:35:301
3173563993928,6cyclictest3337319-21sh23:50:001
3173564993830,5cyclictest3362399-21missed_timers00:20:352
3173564993830,5cyclictest3313205-21munin-run23:20:002
3173564993830,5cyclictest3313205-21munin-run23:20:002
3173564993829,6cyclictest3326744-21mailstats23:35:462
3173564993829,6cyclictest3326744-21mailstats23:35:462
3173564993829,5cyclictest3322862-21timerandwakeup23:30:472
3173564993828,6cyclictest3199850-21needreboot20:35:392
3173564993828,5cyclictest0-21swapper/221:25:402
3173563993831,3cyclictest0-21swapper/123:35:411
3173563993831,3cyclictest0-21swapper/123:35:411
3173563993829,5cyclictest3179572-21systemd-run19:30:011
3173563993828,4cyclictest0-21swapper/121:50:371
3173563993827,6cyclictest1051-21mta-sts-daemon22:50:391
3173563993823,11cyclictest3298997-21unixbench_singl23:00:531
3173563993814,15cyclictest3214733-21sshd21:15:381
3173563993814,15cyclictest3214733-21sshd21:15:381
3173562993830,5cyclictest1368112-21cups-browsed22:20:380
3173562993830,5cyclictest1368112-21cups-browsed22:20:380
3173564993728,6cyclictest3265144-21munin-run22:20:012
3173564993728,6cyclictest3265144-21munin-run22:20:012
3173564993727,6cyclictest3290953-21unixbench_singl22:50:502
3173564993725,9cyclictest3238549-21ntp_kernel_pll_21:45:412
317356499371,29cyclictest3226688-21ssh21:30:392
3173563993729,3cyclictest0-21swapper/122:55:431
3173563993727,6cyclictest3373508-21latency_hist00:35:021
317356299373,23cyclictest3218866-21ssh21:20:450
3173562993729,5cyclictest420-21avahi-daemon23:17:310
3173562993729,5cyclictest420-21avahi-daemon23:17:310
3173564993628,5cyclictest3281841-21fschecks_count22:40:302
3173564993628,5cyclictest3277047-21latency_hist22:35:022
3173564993628,5cyclictest3196068-21systemd-run20:25:012
3173564993626,6cyclictest3374276-21if_eth000:35:312
3173564993626,5cyclictest3233961-21aten_r2power_fr21:40:272
3173564993625,8cyclictest3346320-21latency00:00:322
317356499362,26cyclictest3218777-21ssh21:20:412
317356499361,25cyclictest3338622-21ssh23:50:452
3173563993628,5cyclictest3282496-21sendmail_mailqu22:40:441
3173563993628,5cyclictest3273159-21latency_hist22:30:011
3173563993627,6cyclictest3277172-21latency_hist22:35:021
3173563993624,8cyclictest3222518-21ls21:25:311
317356399362,26cyclictest3330645-21ssh23:40:451
317356399361,28cyclictest3246476-21ssh21:55:431
3173562993627,7cyclictest3250093-21kernelversion22:00:330
3173562993627,6cyclictest1368112-21cups-browsed21:58:260
317356499355,25cyclictest3366552-21ssh00:25:382
3173564993529,4cyclictest3194574-21kthreadd20:20:012
3173564993529,3cyclictest0-21swapper/222:45:402
3173564993521,11cyclictest421-21dbus-daemon20:05:422
317356399355,25cyclictest3218745-21ssh21:20:401
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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