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2026-05-12 - 20:03

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #2

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 rack1slot2s.osadl.org (updated Tue May 12, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
234423626,0sleep30-21swapper/306:53:263
219423627,0sleep20-21swapper/206:51:372
3245823228,0sleep00-21swapper/006:51:110
242823119,0sleep10-21swapper/106:54:241
339960,0migration/3894-21irqcore11:56:053
339960,0migration/37697-21sh11:40:153
339960,0migration/323954-21sh09:47:033
339960,0migration/323582-21sh10:06:393
339960,0migration/316720-21sh09:44:233
339960,0migration/316123-21sh11:05:153
29725060,0irq/27-eth0-tx-2854-21munin-node06:56:120
29715060,0irq/26-eth0-rx-22241-21grep09:26:083
26399965,0cyclictest25594-21munin-node11:31:061
26399960,0cyclictest0-21swapper/111:36:191
26379960,0cyclictest0-21swapper/010:31:050
149960,0migration/025491-21idleruntime11:11:050
149960,0migration/015229-21sh10:21:240
149960,0migration/013931-21ntp_offset11:21:110
339950,0migration/39258-21taskset06:59:153
339950,0migration/38458-21aten_r1power_en11:21:033
339950,0migration/38190-21sh11:41:013
339950,0migration/37249-21munin-node09:36:123
339950,0migration/36308-21df_abs08:11:033
339950,0migration/332246-21aten_r1power_vo12:16:013
339950,0migration/332219-21taskset09:11:453
339950,0migration/331489-21taskset11:54:233
339950,0migration/33027-21kthreadcore09:16:073
339950,0migration/326629-21kthreadcore07:36:093
339950,0migration/325820-21aten2.4-expect09:31:013
339950,0migration/324443-21kthreadcore07:11:093
339950,0migration/321793-21munin-node12:06:113
339950,0migration/317238-21latency_hist07:30:513
339950,0migration/317009-21kthreadcore08:41:083
339950,0migration/312610-21kthreadcore10:01:083
339950,0migration/311814-21kthreadcore07:01:073
339950,0migration/310224-21fschecks_count09:21:043
29725050,0irq/27-eth0-tx-9037-21munin-node10:21:152
29725050,0irq/27-eth0-tx-8205-21munin-node11:41:102
29725050,0irq/27-eth0-tx-7224-21ssh11:38:522
29725050,0irq/27-eth0-tx-30641-21kthreadcore09:51:092
29725050,0irq/27-eth0-tx-24543-21ssh10:09:272
29725050,0irq/27-eth0-tx-24060-21munin-node12:11:012
29725050,0irq/27-eth0-tx-23419-21ssh10:47:262
29725050,0irq/27-eth0-tx-17781-21munin-node09:26:032
29725050,0irq/27-eth0-tx-17077-21munin-node10:26:132
29725050,0irq/27-eth0-tx-16181-21munin-node11:46:072
29725050,0irq/27-eth0-tx-1115-21munin-node08:56:100
29725050,0irq/27-eth0-tx-0-21swapper/211:52:142
29725050,0irq/27-eth0-tx-0-21swapper/211:26:102
29725050,0irq/27-eth0-tx-0-21swapper/210:53:072
29725050,0irq/27-eth0-tx-0-21swapper/209:07:442
29725050,0irq/27-eth0-tx-0-21swapper/008:31:080
29715050,0irq/26-eth0-rx-7981-21ssh09:57:553
29715050,0irq/26-eth0-rx-6402-21python10:56:133
29715050,0irq/26-eth0-rx-31560-21ssh10:52:503
29715050,0irq/26-eth0-rx-30877-21ssh10:11:103
29715050,0irq/26-eth0-rx-27132-21cut10:31:073
29715050,0irq/26-eth0-rx-24192-21sh10:28:583
29715050,0irq/26-eth0-rx-0-21swapper/312:24:303
29715050,0irq/26-eth0-rx-0-21swapper/312:11:573
29715050,0irq/26-eth0-rx-0-21swapper/312:01:073
29715050,0irq/26-eth0-rx-0-21swapper/311:16:123
29715050,0irq/26-eth0-rx-0-21swapper/311:10:563
29715050,0irq/26-eth0-rx-0-21swapper/311:06:153
29715050,0irq/26-eth0-rx-0-21swapper/310:43:133
29715050,0irq/26-eth0-rx-0-21swapper/310:16:073
29715050,0irq/26-eth0-rx-0-21swapper/309:51:093
29715050,0irq/26-eth0-rx-0-21swapper/309:01:023
29715050,0irq/26-eth0-rx-0-21swapper/308:59:373
26409955,0cyclictest0-21swapper/210:16:142
26399955,0cyclictest0-21swapper/110:45:331
26399955,0cyclictest0-21swapper/109:30:581
26399950,0cyclictest0-21swapper/111:18:111
26399950,0cyclictest0-21swapper/110:16:411
26399950,0cyclictest0-21swapper/109:06:321
26399950,0cyclictest0-21swapper/106:56:091
26379955,0cyclictest16951-21kworker/0:209:21:160
26379950,0cyclictest0-21swapper/011:47:140
26379950,0cyclictest0-21swapper/009:10:500
259950,0migration/29414-21fschecks_count10:41:042
259950,0migration/26835-21sh11:58:112
259950,0migration/25537-21kthreadcore11:16:082
259950,0migration/24838-21munin-node07:21:072
259950,0migration/232246-21latency_hist11:35:502
259950,0migration/231273-21needreboot08:26:102
259950,0migration/221392-21munin-node12:06:072
259950,0migration/218677-21munin-node07:56:032
259950,0migration/215188-21missed_timers09:21:102
259950,0migration/21491-21df_abs09:56:042
259950,0migration/213546-21munin-node08:41:012
259950,0migration/213463-21missed_timers12:01:082
249950,0watchdog/28654-21munin-node11:01:122
249950,0watchdog/226247-21kthreadcore07:36:092
249950,0watchdog/210630-21kthreadcore08:36:092
19150,0ktimersoftd/10-21swapper/112:19:111
19150,0ktimersoftd/10-21swapper/109:28:361
179950,0migration/17411-21runrttasks09:56:171
179950,0migration/132245-21taskset08:29:591
179950,0migration/13134-21kthreadcore08:06:061
179950,0migration/12622-21munin-node07:16:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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