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2026-03-31 - 17:44

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 Tue Mar 31, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2225166996447,11cyclictest421-21dbus-daemon12:25:301
2225166996048,8cyclictest2400472-21/usr/sbin/munin12:00:021
2225165995619,29cyclictest2352389-21ssh11:00:270
222516699494,36cyclictest2290938-21ssh09:45:271
2225166994939,6cyclictest2302156-21systemd-run10:00:021
2225166994939,6cyclictest2302156-21systemd-run10:00:021
2225166994936,8cyclictest439-21systemd-logind10:00:401
2225165994941,5cyclictest2397539-21ntpq11:55:320
2225166994839,5cyclictest2318550-21systemd-run10:20:011
2225166994638,4cyclictest0-21swapper/110:55:011
2225166994635,8cyclictest439-21systemd-logind12:15:011
2225165994637,7cyclictest2238656-21sh07:55:010
2225165994637,7cyclictest2238656-21sh07:55:010
2225165994534,6cyclictest2290931-21ssh09:45:270
2225167994435,5cyclictest2402225-21grep12:00:412
2225167994434,4cyclictest0-21swapper/210:10:352
2225167994433,8cyclictest2269389-21sendmail09:20:012
2225165994430,5cyclictest420-21avahi-daemon10:25:300
222516799437,3cyclictest2261139-21diskmemload09:55:352
222516799437,3cyclictest2261139-21diskmemload09:55:352
222516799435,28cyclictest2262344-21ssh09:10:302
2225167994334,6cyclictest421-21dbus-daemon11:25:012
2225167994334,6cyclictest421-21dbus-daemon11:25:012
2225166994331,9cyclictest2266911-21timerwakeupswit09:15:401
222516599434,30cyclictest2278716-21ssh09:30:280
222516799424,20cyclictest2303219-21ssh10:00:302
2225167994231,7cyclictest420-21avahi-daemon12:35:472
2225166994234,5cyclictest2359469-21ssh11:10:011
2225165994235,5cyclictest1360225-21cups-browsed11:20:430
2225165994235,5cyclictest1360225-21cups-browsed11:20:430
2225165994235,4cyclictest2388204-21latency_hist11:45:020
2225167994133,5cyclictest2240125-21cron08:00:002
2225167994128,10cyclictest2409659-21needreboot12:10:282
222516699414,30cyclictest2413985-21ssh12:15:351
2225166994134,3cyclictest0-21swapper/107:35:011
2225166994133,5cyclictest2339037-21systemd-run10:45:021
2225166994133,5cyclictest2339037-21systemd-run10:45:021
222516699412,33cyclictest2401555-21ssh12:00:291
2225165994137,2cyclictest0-21swapper/012:30:400
2225165994131,4cyclictest0-21swapper/011:35:310
2225167994030,6cyclictest1056-21mta-sts-daemon09:00:252
2225167994030,6cyclictest1056-21mta-sts-daemon09:00:252
2225166994033,4cyclictest0-21swapper/111:20:011
2225166994030,4cyclictest0-21swapper/111:50:281
2225166994027,9cyclictest2294888-21missed_timers09:50:251
222516599404,30cyclictest2327900-21ssh10:30:320
2225165994029,8cyclictest2322597-21latency_hist10:25:020
2225165994017,6cyclictest12350irq/32-eth010:10:280
2225166993931,5cyclictest2252134-21grep08:40:011
2225165993930,6cyclictest420-21avahi-daemon09:36:040
2225165993930,6cyclictest420-21avahi-daemon09:36:040
2225167993831,4cyclictest2241670-21true08:05:012
2225167993830,5cyclictest2343099-21cron10:50:002
2225167993830,3cyclictest0-21swapper/212:05:312
2225167993830,3cyclictest0-21swapper/212:05:312
2225167993828,6cyclictest2347184-21cron10:55:002
2225166993829,7cyclictest2383996-21sendmail11:40:011
2225166993829,6cyclictest2340733-21unixbench_multi10:45:421
2225166993829,5cyclictest2353018-21tail11:00:401
2225165993830,5cyclictest420-21avahi-daemon08:45:360
2225165993824,12cyclictest2318507-21run-parts10:20:010
2225165993822,8cyclictest12350irq/32-eth010:45:310
2225167993729,3cyclictest0-21swapper/212:20:302
2225167993720,13cyclictest351ktimers/208:55:332
2225167993720,13cyclictest351ktimers/208:55:332
222516699373,25cyclictest2262262-21ssh09:10:271
2225166993730,4cyclictest2351324-21systemd-run11:00:021
2225166993728,5cyclictest0-21swapper/107:50:011
2225166993728,5cyclictest0-21swapper/107:50:011
2225166993727,6cyclictest0-21swapper/111:45:011
2225165993730,5cyclictest548-21gdbus09:15:010
2225165993730,5cyclictest2392708-21sh11:50:180
2225165993725,10cyclictest2287546-21unixbench_singl09:40:420
222516799363,27cyclictest2356714-21sh11:05:362
2225167993630,3cyclictest0-21swapper/212:30:422
2225167993628,5cyclictest2416827-21sendmail12:20:012
2225167993627,6cyclictest2289857-21munin-plugin-st09:45:002
2225167993627,4cyclictest0-21swapper/211:00:312
2225166993628,5cyclictest2430100-21grep12:35:241
2225166993628,5cyclictest2287546-21unixbench_singl09:40:421
222516599365,5cyclictest171rcu_preempt09:15:350
2225165993629,4cyclictest2225170-21systemd-run07:10:010
2225165993627,7cyclictest421-21dbus-daemon10:00:400
2225165993627,6cyclictest1360225-21cups-browsed11:45:080
222516599361,29cyclictest2372891-21ssh11:25:300
222516599361,29cyclictest2372891-21ssh11:25:300
222516799357,17cyclictest2377076-21ssh11:30:342
2225167993527,5cyclictest2336613-21unixbench_multi10:40:412
2225167993527,5cyclictest2336613-21unixbench_multi10:40:412
2225167993527,5cyclictest2252126-21cron08:40:012
222516799352,27cyclictest2372843-21ssh11:25:292
222516799352,27cyclictest2372843-21ssh11:25:292
222516799352,26cyclictest2389296-21sh11:45:302
2225166993529,3cyclictest0-21swapper/112:10:001
2225166993529,3cyclictest0-21swapper/112:10:001
2225166993528,3cyclictest0-21swapper/109:40:011
2225166993528,3cyclictest0-21swapper/109:40:011
2225166993527,5cyclictest2334871-21ssh10:40:011
2225166993525,7cyclictest2257496-21ntp_kernel_pll_08:55:281
2225166993525,7cyclictest2257496-21ntp_kernel_pll_08:55:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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