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2026-07-28 - 03:12

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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.

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 rack4slot1s.osadl.org (updated Tue Jul 28, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
513021280,4chrt5133-21grep22:48:461
2138421010,3chrt0-21swapper/320:38:483
2138421010,3chrt0-21swapper/320:38:483
317432970,4sleep30-21swapper/323:58:513
317432970,4sleep30-21swapper/323:58:513
18522860,1sleep0201rcuc/021:13:460
18522860,1sleep0201rcuc/021:13:460
36412760,3sleep30-21swapper/322:43:503
141152740,4sleep30-21swapper/300:38:473
141152740,4sleep30-21swapper/300:38:473
182052670,5sleep018378-21unixbench-2d20:28:570
182052670,5sleep018378-21unixbench-2d20:28:570
106772600,2sleep10-21swapper/123:03:461
7652580,3sleep30-21swapper/319:43:483
102412550,2chrt1616-21sendmail-mta23:03:250
182882480,4sleep30-21swapper/323:23:473
182882480,4sleep30-21swapper/323:23:473
139462430,2sleep113947-21if_wlan020:18:481
224072410,3chrt0-21swapper/323:33:513
224072410,3chrt0-21swapper/323:33:513
10792400,3sleep0171ktimers/019:43:530
28292390,3sleep20-21swapper/221:13:562
28292390,3sleep20-21swapper/221:13:562
21669993920,15cyclictest0-21swapper/000:03:380
21669993920,15cyclictest0-21swapper/000:03:380
259982380,3sleep20-21swapper/219:23:492
259982380,3sleep20-21swapper/219:23:492
259592380,2sleep125291-21/usr/sbin/munin19:23:491
259592380,2sleep125291-21/usr/sbin/munin19:23:491
11002380,3sleep20-21swapper/200:03:492
11002380,3sleep20-21swapper/200:03:492
21669993730,6cyclictest19579-21threads21:58:570
21669993730,6cyclictest19579-21threads21:58:570
21669993730,5cyclictest32516-21latency_hist19:43:330
21669993730,5cyclictest32516-21latency_hist19:43:330
100072370,2sleep10-21swapper/100:28:441
100072370,2sleep10-21swapper/100:28:441
21670993620,3cyclictest700-21192.168.115.40-manager19:59:291
21670993620,3cyclictest700-21192.168.115.40-manager19:59:291
21669993629,5cyclictest4052-21kernelversion21:18:500
21669993629,5cyclictest4052-21kernelversion21:18:500
21669993629,5cyclictest28799-21latency_hist19:33:330
21669993629,5cyclictest28799-21latency_hist19:33:330
21669993629,5cyclictest13774-21gltestperf20:18:460
208692360,3sleep20-21swapper/220:38:392
208692360,3sleep20-21swapper/220:38:392
21669993528,6cyclictest25986-21kernelversion23:43:480
21669993528,6cyclictest25986-21kernelversion23:43:480
21669993528,5cyclictest29719-21netstat19:33:510
21669993528,5cyclictest29719-21netstat19:33:510
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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