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2026-03-25 - 08:31

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 50 highest latencies:
System rack1slot2s.osadl.org (updated Wed Mar 25, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450590,0irq/25-eth10-21swapper/318:55:383
2734623626,0sleep20-21swapper/218:58:002
2751423524,0sleep00-21swapper/018:59:580
2658023424,0sleep10-21swapper/118:55:471
276279983,0cyclictest19279-21awk20:30:390
276279980,0cyclictest22193-21munin-node19:20:380
276279980,0cyclictest11798-21munin-node20:25:380
276279973,0cyclictest3556-21lldpd19:01:130
276279972,0cyclictest729-21awk23:05:370
276279972,0cyclictest31760-21awk20:15:400
276279972,0cyclictest31583-21dump-pmu-power23:25:240
276279972,0cyclictest2993-21awk19:05:400
276279972,0cyclictest29592-21turbostat19:50:250
276279972,0cyclictest28042-21grep22:20:420
276279972,0cyclictest2653-21awk21:05:390
276279972,0cyclictest25681-21sadc21:40:250
276279972,0cyclictest2443-21awk21:45:400
276279972,0cyclictest16095-21awk23:55:400
276279971,0cyclictest32446-21awk23:45:410
276279971,0cyclictest21967-21sadc19:20:250
276279971,0cyclictest18606-21awk21:55:420
276279970,0cyclictest930-21ssh21:44:200
276279970,0cyclictest8601-21netstat19:30:440
276279970,0cyclictest5064-21munin-node20:20:430
276279970,0cyclictest24381-21irqstats00:00:420
276279970,0cyclictest2156-21munin-node22:05:400
276279970,0cyclictest19739-21cut00:15:430
276279970,0cyclictest16499-21munin-node19:40:470
276279970,0cyclictest16238-21ssh22:13:190
276279970,0cyclictest16034-21ssh22:55:210
276279970,0cyclictest13216-21awk23:30:460
276279970,0cyclictest1229-21ssh21:24:040
276279970,0cyclictest10134-21tune2fs21:50:380
276279970,0cyclictest10134-21tune2fs21:50:380
276279970,0cyclictest0-21swapper/020:10:460
339960,0migration/330707-21sh23:22:513
339960,0migration/324078-21sh22:17:573
339960,0migration/317726-21sh21:14:563
339960,0migration/315550-21munin-node23:35:363
29715060,0irq/26-eth0-rx-25882-21ssh21:20:103
29715060,0irq/26-eth0-rx-17309-21if_eth1.322:55:403
29715060,0irq/26-eth0-rx-1450-21ssh22:45:403
276309966,0cyclictest0-21swapper/220:35:422
276279961,0cyclictest31857-21aten_r1power_po20:40:360
276279961,0cyclictest25714-21grep20:35:380
276279960,0cyclictest9962-21aten_r1power_po19:35:360
276279960,0cyclictest9955-21cat21:30:250
276279960,0cyclictest9745-21latency_hist21:10:250
276279960,0cyclictest9216-21tr19:10:370
276279960,0cyclictest8786-21sh22:30:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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