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2026-07-11 - 08:10

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 Sat Jul 11, 2026 00:43:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2256288995028,19cyclictest0-21swapper/221:45:012
2256287994938,7cyclictest420-21avahi-daemon23:20:321
2256287994938,7cyclictest420-21avahi-daemon23:20:321
2256286994929,14cyclictest12650irq/32-eth021:00:420
2256287994827,18cyclictest0-21swapper/122:50:001
2256286994841,5cyclictest2275793-21systemd-run20:15:010
2256286994841,5cyclictest2275793-21systemd-run20:15:010
2256287994638,5cyclictest2368306-21munin-run23:15:011
225628699466,37cyclictest2402381-21ssh00:10:360
2256286994632,7cyclictest12650irq/32-eth022:05:420
2256288994538,4cyclictest2266774-21cron19:45:012
2256288994537,5cyclictest2274293-21systemd-run20:10:012
2256288994529,13cyclictest2393907-21unixbench-2d23:55:502
2256288994524,17cyclictest420-21avahi-daemon23:40:322
225628899452,23cyclictest2330077-21ntpq22:10:472
2256288994520,20cyclictest2292140-21unixbench_multi21:05:492
2256287994535,7cyclictest1003-21mta-sts-daemon00:00:011
2256286994524,4cyclictest171rcu_preempt00:00:410
225628699450,6cyclictest0-21swapper/021:45:440
225628699450,6cyclictest0-21swapper/021:45:440
2256288994435,6cyclictest2347059-21sendmail22:40:002
225628799445,28cyclictest2314867-21ssh21:45:411
225628799445,28cyclictest2314867-21ssh21:45:411
2256286994431,11cyclictest2419390-21munin-run00:40:000
2256288994322,19cyclictest0-21swapper/223:40:022
2256287994336,4cyclictest2371330-21ssh23:20:011
225628799432,34cyclictest2273684-21ntpq20:05:421
2256286994331,9cyclictest2372764-21switchtime23:20:490
2256286994331,9cyclictest2372764-21switchtime23:20:490
2256288994232,7cyclictest2298399-21munin-plugin-st21:20:012
2256288994221,17cyclictest2274539-21aten_r2power_cu20:10:322
2256288994221,17cyclictest2274539-21aten_r2power_cu20:10:322
2256287994233,5cyclictest1000-21mta-sts-daemon21:38:151
2256287994232,7cyclictest2298402-21sendmail21:20:011
225628799422,33cyclictest2357353-21ssh22:55:441
225628799422,33cyclictest2278262-21ntpq20:20:441
225628799421,35cyclictest2288669-21ntpq20:55:391
2256286994235,4cyclictest2292271-21diskmemload00:15:520
2256286994234,5cyclictest421-21dbus-daemon22:20:010
2256288994133,4cyclictest1003-21mta-sts-daemon22:05:392
2256287994135,3cyclictest0-21swapper/119:30:421
2256287994131,7cyclictest2413513-21sort00:30:021
2256286994126,5cyclictest421-21dbus-daemon00:25:350
2256286994126,12cyclictest2309002-21sh21:35:490
225628899409,27cyclictest421-21dbus-daemon21:47:532
225628899409,27cyclictest421-21dbus-daemon21:47:532
2256288994030,7cyclictest510950-21cups-browsed23:20:012
2256288994025,11cyclictest0-21swapper/200:00:472
2256288994019,18cyclictest0-21swapper/222:25:022
2256287994032,5cyclictest2292270-21idleruntime-cro21:10:011
2256287994031,6cyclictest420-21avahi-daemon21:40:461
225628799402,32cyclictest2392326-21/usr/sbin/munin23:55:021
2256287994021,16cyclictest0-21swapper/122:45:021
2256287994019,19cyclictest0-21swapper/122:25:031
2256287994019,18cyclictest0-21swapper/100:15:021
225628799401,35cyclictest2281153-21ntpq20:30:381
2256286994026,10cyclictest0-21swapper/021:05:490
2256288993931,5cyclictest1002-21mta-sts-daemon23:10:422
2256288993922,8cyclictest0-21swapper/221:25:412
225628899392,26cyclictest2305675-21ssh21:30:432
2256288993922,14cyclictest510950-21cups-browsed23:01:162
225628799392,31cyclictest2287127-21ntpq20:50:361
225628799391,34cyclictest2290154-21ntpq21:00:391
225628799391,30cyclictest2275289-21ps20:10:501
225628799391,30cyclictest2275289-21ps20:10:501
2256286993928,8cyclictest2289294-21sh21:00:010
2256286993928,5cyclictest0-21swapper/023:00:430
2256288993826,8cyclictest1001-21mta-sts-daemon23:49:472
2256288993823,13cyclictest0-21swapper/223:30:542
2256288993823,13cyclictest0-21swapper/223:30:542
2256288993818,14cyclictest0-21swapper/220:35:352
225628799384,29cyclictest2302596-21sshd21:25:421
2256287993830,5cyclictest2323486-21fschecks_time22:00:321
2256287993829,7cyclictest2307598-21sh21:35:011
2256287993829,6cyclictest420-21avahi-daemon23:26:131
2256287993829,6cyclictest420-21avahi-daemon23:26:131
2256287993829,6cyclictest2386365-21wc23:45:021
2256287993813,21cyclictest2399103-21ssh00:05:331
225628799381,31cyclictest2381465-21ntpq23:35:401
225628799381,11cyclictest2330762-21ssh22:11:251
225628899373,29cyclictest2348171-21ntpq22:40:412
225628899372,30cyclictest2288613-21ntpq20:55:362
2256288993715,16cyclictest0-21swapper/221:50:252
2256288993715,16cyclictest0-21swapper/221:50:252
225628899371,33cyclictest2284335-21/usr/sbin/munin20:40:452
225628899371,31cyclictest2277439-21latency_hist20:20:022
225628899371,31cyclictest2277439-21latency_hist20:20:022
225628899371,31cyclictest2261625-21ntpq19:25:372
225628799376,28cyclictest2333335-21grep22:15:551
225628799373,29cyclictest2279625-21ntpq20:25:361
2256287993729,5cyclictest2345672-21unixbench_multi22:35:501
225628799372,31cyclictest2363260-21ntpq23:05:371
225628799372,31cyclictest2326973-21ntpq22:05:421
225628799372,30cyclictest2320894-21ntpq21:55:411
225628799371,33cyclictest2284151-21ntpq20:40:381
225628799371,33cyclictest2267736-21ntpq19:45:441
225628799371,31cyclictest2264631-21ntpq19:35:381
225628799371,31cyclictest2258653-21ntpq19:15:391
225628799371,31cyclictest2258653-21ntpq19:15:391
225628799371,11cyclictest2379153-21ssh23:31:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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