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2026-06-12 - 03:54

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 Jun 12, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
215637299532,41cyclictest2228415-21sh22:05:302
215637299532,41cyclictest2228415-21sh22:05:302
215637199531,31cyclictest2285153-21ssh23:35:251
215637299526,18cyclictest2215641-21ssh21:45:252
215637199526,15cyclictest1001-21mta-sts-daemon21:25:231
2156371995123,12cyclictest2310520-21sshd00:15:281
2156370995136,10cyclictest12650irq/32-eth023:35:220
215637299504,33cyclictest2202927-21ssh21:25:242
215637299501,6cyclictest2199847-21ssh21:20:282
2156370995029,13cyclictest12650irq/32-eth023:55:270
2156372994941,5cyclictest2287308-21tr23:40:012
2156370994841,3cyclictest0-21swapper/022:15:300
2156370994835,10cyclictest2293637-21ssh23:50:020
2156372994537,5cyclictest2303115-21munin-plugin-st00:05:012
2156371994538,4cyclictest0-21swapper/123:15:271
2156371994533,7cyclictest2275649-21sh23:20:231
2156372994439,2cyclictest0-21swapper/222:40:262
2156372994436,5cyclictest2306291-21systemd-run00:10:012
215637299442,33cyclictest2193442-21ssh21:10:292
215637299441,11cyclictest2256855-21ssh22:50:322
2156372994332,7cyclictest420-21avahi-daemon23:50:302
2156372994331,4cyclictest171rcu_preempt19:20:222
2156370994335,5cyclictest2162362-21idleruntime-cro19:30:010
215637299424,7cyclictest171rcu_preempt22:45:252
215637299422,36cyclictest2184221-21sshd20:40:222
2156371994235,4cyclictest2252559-21cron22:45:001
2156371994212,4cyclictest171rcu_preempt23:55:311
215637099426,28cyclictest2225276-21ssh22:00:330
215637099426,28cyclictest2225276-21ssh22:00:330
2156370994225,8cyclictest12650irq/32-eth020:20:250
215637299418,22cyclictest428-21mta-sts-daemon23:20:302
2156372994134,5cyclictest1000-21mta-sts-daemon22:35:302
2156372994134,2cyclictest0-21swapper/222:30:272
2156372994131,6cyclictest1-21systemd19:50:022
2156372994130,8cyclictest2311047-21unixbench_singl00:15:362
2156372994126,10cyclictest0-21swapper/200:30:272
215637299412,34cyclictest2288427-21ssh23:40:302
2156371994134,3cyclictest0-21swapper/100:20:271
215637199411,34cyclictest2206229-21ssh21:30:281
2156370994127,4cyclictest2212170-21if_eth021:40:220
215637299402,8cyclictest171rcu_preempt23:10:302
215637199402,30cyclictest2294743-21ssh23:50:291
2156370994015,5cyclictest12750irq/33-eth022:35:260
2156372993932,3cyclictest0-21swapper/223:00:012
2156372993932,3cyclictest0-21swapper/222:00:012
2156372993932,3cyclictest0-21swapper/222:00:012
2156372993931,5cyclictest421-21dbus-daemon20:10:232
2156371993931,5cyclictest2244695-21unixbench_singl22:30:381
2156371993931,5cyclictest2236745-21grep22:20:001
2156371993931,5cyclictest1001-21mta-sts-daemon21:20:251
2156371993929,7cyclictest2220923-21cron21:55:011
215637099391,33cyclictest2237810-21ssh22:20:270
2156372993830,5cyclictest2165348-21sendmail19:40:002
2156372993830,5cyclictest2165348-21sendmail19:40:002
2156372993828,7cyclictest0-21swapper/223:55:362
2156372993827,7cyclictest420-21avahi-daemon23:01:312
2156371993830,5cyclictest421-21dbus-daemon23:00:011
2156371993830,5cyclictest2167052-21latency_hist19:45:021
2156371993829,5cyclictest0-21swapper/120:20:221
2156371993827,8cyclictest2318932-21sh00:30:011
215637199382,28cyclictest2278984-21ssh23:25:351
2156370993833,3cyclictest2271501-21ssh23:15:010
215637299373,27cyclictest2212523-21ssh21:40:322
2156372993728,4cyclictest0-21swapper/200:20:142
215637299372,6cyclictest171rcu_preempt22:00:262
215637299372,6cyclictest171rcu_preempt22:00:262
215637299371,29cyclictest2266225-21rm23:05:252
215637199373,29cyclictest2193531-21ssh21:10:331
2156371993729,5cyclictest2255781-21latency_hist22:50:021
2156371993729,5cyclictest2175869-21systemd-run20:15:021
2156371993729,5cyclictest0-21swapper/121:40:011
2156371993728,6cyclictest423725-21cups-browsed20:45:141
2156370993731,3cyclictest0-21swapper/022:10:220
2156370993731,3cyclictest0-21swapper/022:10:220
2156370993725,10cyclictest2303191-21grep00:05:020
215637299363,24cyclictest2291519-21ssh23:45:272
2156372993628,5cyclictest2171343-21munin-run20:00:012
215637199363,27cyclictest2307247-21ssh00:10:231
2156371993629,3cyclictest0-21swapper/123:10:301
2156371993626,6cyclictest2263667-21head23:00:381
2156370993630,3cyclictest0-21swapper/020:05:020
2156370993627,7cyclictest2246327-21latency_hist22:35:020
215637299355,18cyclictest2281971-21ssh23:30:252
2156372993526,5cyclictest2187864-21kworker/u8:10+xprtiod20:55:012
2156372993524,8cyclictest2325232-21idleruntime-cro00:40:012
2156372993517,12cyclictest1002-21mta-sts-daemon20:35:222
215637299351,26cyclictest2241057-21ssh22:25:342
215637199353,25cyclictest2237820-21ssh22:20:281
2156371993528,3cyclictest0-21swapper/122:30:011
2156371993527,5cyclictest2290472-21grep23:45:011
2156371993527,5cyclictest0-21swapper/120:20:011
215637199352,26cyclictest2266205-21ssh23:05:241
215637099359,17cyclictest428-21mta-sts-daemon23:50:240
2156370993527,5cyclictest1-21systemd19:40:010
2156370993527,5cyclictest1-21systemd19:40:010
2156370993526,7cyclictest2312601-21sendmail00:20:010
2156372993429,2cyclictest0-21swapper/222:25:012
2156372993427,3cyclictest0-21swapper/223:25:312
2156371993427,4cyclictest2196410-21latency21:15:251
2156371993427,3cyclictest0-21swapper/100:00:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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