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2025-12-14 - 17:02

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.

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 Dec 14, 2025 07:55:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3687451996648,14cyclictest3908342-21grep05:39:390
3687453996339,5cyclictest3919043-21od05:40:262
3687453995831,19cyclictest1167-21mta-sts-daemon05:29:422
3687452995544,8cyclictest3910022-21multi.sh05:39:461
3687453995343,6cyclictest270800-21multi.sh06:08:592
3687452995346,3cyclictest3678270-21kworker/u8:14-xprtiod06:09:421
3687453995245,3cyclictest0-21swapper/205:49:392
3687453995244,5cyclictest358654-21sh06:12:292
3687452995232,3cyclictest171rcu_preempt06:10:081
3687451995044,4cyclictest329164-21sh06:11:190
3687451994841,5cyclictest3971942-21sh05:42:390
3687451994838,8cyclictest290297-21wc06:09:440
3687452994739,4cyclictest3948433-21sh05:41:391
3687453994637,6cyclictest369-21systemd-journal06:25:012
3687451994636,7cyclictest3995873-21execl05:49:400
3687452994533,9cyclictest378947-21sh06:40:011
3687452994335,5cyclictest3995872-21execl05:49:501
3687452994133,5cyclictest3690435-21systemd-run05:15:011
368745399405,27cyclictest3910105-21tee05:39:462
3687452994030,7cyclictest4006055-21spawn06:02:501
3687453993832,3cyclictest0-21swapper/205:15:012
3687453993830,5cyclictest3693531-21grep05:24:472
3687453993829,6cyclictest164480-21spawn06:04:152
3687452993829,5cyclictest3998473-21Run05:59:061
3687451993832,3cyclictest0-21swapper/006:20:010
368745199382,33cyclictest3850355-21spawn05:34:470
3687453993730,4cyclictest0-21swapper/205:51:042
3687452993732,2cyclictest0-21swapper/105:50:131
3687451993731,4cyclictest378916-21grep06:40:000
3687451993630,3cyclictest4117799-21spawn06:03:150
3687451993621,12cyclictest0-21swapper/005:50:580
3687452993527,5cyclictest1-21systemd06:30:011
368745299351,30cyclictest3692383-21fstime05:24:391
3687451993529,4cyclictest374516-21rotate-stats06:25:010
3687453993418,10cyclictest3998374-21fstime05:57:192
3687453993415,13cyclictest0-21swapper/205:34:432
368745299343,23cyclictest577-21mta-sts-daemon05:29:421
3687452993325,5cyclictest3821702-21spawn05:34:521
368745199331,28cyclictest3999069-21pipe05:59:360
3687452993221,8cyclictest374536-21munin-plugin-st06:25:011
3687451993226,4cyclictest3691947-21unixbench_multi05:19:490
3687451993226,4cyclictest3690347-21cron05:15:010
3687453993123,5cyclictest373047-21munin-run06:20:012
3687452993123,5cyclictest377449-21cron06:35:011
3687453993022,5cyclictest378903-21cron06:40:002
3687452993022,5cyclictest3691964-21unixbench_multi05:19:491
3687451993022,6cyclictest3688269-21needreboot05:09:370
368745399293,17cyclictest1166-21mta-sts-daemon06:29:382
3687453992924,2cyclictest0-21swapper/205:20:012
3687451992924,2cyclictest0-21swapper/006:30:010
3687451992923,3cyclictest0-21swapper/005:30:010
3687453992821,4cyclictest1168-21mta-sts-daemon05:09:392
3687453992821,3cyclictest0-21swapper/206:35:012
3687452992418,3cyclictest0-21swapper/106:20:011
3687452992416,5cyclictest3688228-21missed_timers05:09:361
3687451992417,4cyclictest377565-21latency_hist06:35:020
3687451992219,2cyclictest0-21swapper/005:05:010
3687451992215,5cyclictest3562023-21cups-browsed05:20:330
368745499214,10cyclictest0-21swapper/305:57:013
3687453992116,3cyclictest0-21swapper/205:05:012
3687452992015,2cyclictest0-21swapper/105:05:011
368745499192,10cyclictest0-21swapper/305:43:293
368745499183,9cyclictest0-21swapper/305:39:433
368745499176,8cyclictest0-21swapper/305:51:093
368745499173,10cyclictest0-21swapper/306:09:423
368745499172,9cyclictest0-21swapper/306:12:103
368745499172,6cyclictest0-21swapper/306:29:423
368745499171,10cyclictest0-21swapper/306:02:453
368745499164,8cyclictest0-21swapper/305:45:153
368745499161,9cyclictest0-21swapper/305:34:463
368745499154,5cyclictest0-21swapper/305:24:403
368745499151,6cyclictest0-21swapper/306:39:393
368745499151,6cyclictest0-21swapper/306:19:383
368745499142,6cyclictest0-21swapper/305:28:023
368745499133,4cyclictest0-21swapper/306:24:383
368745499131,6cyclictest0-21swapper/305:19:393
368745499121,6cyclictest0-21swapper/305:09:433
368745499111,5cyclictest0-21swapper/306:34:383
368745499102,5cyclictest0-21swapper/305:15:013
36874549981,4cyclictest0-21swapper/305:05:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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