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2025-05-13 - 12:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #8

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 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: 50 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 highest latencies:
System rack9slot8s.osadl.org (updated Tue May 13, 2025 00:44:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1011360,0ktimersoftd/02280-21runrttasks19:07:550
81950900,0irq/47-4a10000029877-21diskmemload23:45:270
81950890,0irq/47-4a100000739-21kworker/u2:023:59:140
81950890,0irq/47-4a10000014568-21kworker/u2:222:06:470
81950880,0irq/47-4a1000007964-21awk22:55:020
81950880,0irq/47-4a10000027076-21ssh23:41:380
81950880,0irq/47-4a10000020369-21kworker/u2:620:10:010
81950880,0irq/47-4a1000001560-21kworker/u2:221:22:430
81850880,0irq/46-4a1000002280-21runrttasks23:30:100
81950870,0irq/47-4a10000029877-21diskmemload23:21:540
81950870,0irq/47-4a10000024729-21ssh22:16:340
81950870,0irq/47-4a10000010073-21rm00:21:110
81950860,0irq/47-4a100000739-21kworker/u2:000:03:020
81950860,0irq/47-4a10000023858-21runrttasks22:14:340
81950860,0irq/47-4a10000010231-21ssh21:40:510
81850860,0irq/46-4a10000022017-21ssh23:29:390
81950850,0irq/47-4a1000009093-21rm21:38:330
81950850,0irq/47-4a1000006833-21ssh00:12:010
81950850,0irq/47-4a1000005743-21ssh22:49:320
81950850,0irq/47-4a10000030859-21rm21:12:140
81950850,0irq/47-4a10000030188-21apt-get22:30:220
81950850,0irq/47-4a10000029877-21diskmemload23:53:570
81950850,0irq/47-4a10000029063-21kworker/u2:100:32:540
81950850,0irq/47-4a10000014192-21sshd19:24:360
81950840,0irq/47-4a1000009563-21munin-run00:20:030
81950840,0irq/47-4a1000006003-21rm21:30:480
81950840,0irq/47-4a1000005659-21ssh00:08:580
81950840,0irq/47-4a10000032743-21kworker/u2:121:17:310
81950840,0irq/47-4a10000028094-21ssh22:24:570
81950840,0irq/47-4a10000024492-21seq20:33:130
81950840,0irq/47-4a10000018836-21rm22:02:070
81950840,0irq/47-4a10000017848-21ssh21:59:540
81950840,0irq/47-4a10000015627-21kworker/u2:200:36:340
81950840,0irq/47-4a10000012786-21ssh21:47:190
89552830,0chrt4721-21kworker/u2:022:57:220
81950830,0irq/47-4a100000701-21ssh22:37:000
81950830,0irq/47-4a1000002956-21ssh22:42:290
81950830,0irq/47-4a10000028396-21latency_hist21:00:040
81950830,0irq/47-4a10000024952-21ssh23:36:280
81950830,0irq/47-4a10000018649-21apt19:55:010
81950830,0irq/47-4a10000017713-21seq19:48:260
81950830,0irq/47-4a10000016860-21ssh23:16:480
81950830,0irq/47-4a10000015869-21ssh23:14:310
81950830,0irq/47-4a10000014501-21ssh21:51:270
81950830,0irq/47-4a10000012968-21ssh23:07:150
81950830,0irq/47-4a10000012863-21rm00:28:500
81950830,0irq/47-4a10000010105-21ssh23:00:060
163322830,0sleep013109-21kworker/u2:019:39:160
81950820,0irq/47-4a10000029916-21ssh21:10:040
81950820,0irq/47-4a10000029877-21diskmemload21:26:380
81950820,0irq/47-4a10000029219-21rm22:27:320
81950820,0irq/47-4a10000023568-21kworker/u2:320:45:020
81950820,0irq/47-4a10000012281-21sshd19:14:360
219922820,0sleep021109-21kworker/u2:020:17:260
81950810,0irq/47-4a10000020855-21latency_hist20:10:030
81950800,0irq/47-4a10000023570-21sshd20:26:350
81950800,0irq/47-4a10000019345-21seq19:59:550
152322800,0sleep013109-21kworker/u2:019:31:120
145802800,0chrt13891-21kworker/u2:419:26:470
81950790,0irq/47-4a10000023078-21apt-get20:25:030
129562790,0sleep010450-21kworker/u2:419:15:420
81950780,0irq/47-4a10000026565-21kworker/u2:020:50:030
81950770,0irq/47-4a10000016430-21kworker/u2:319:45:010
282252760,0chrt27921-21kworker/u2:020:58:470
81950740,0irq/47-4a10000013109-21kworker/u2:020:02:010
81850730,0irq/46-4a10000026936-21apt20:50:000
252082720,0sleep023569-21kworker/u2:420:38:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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