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2025-04-02 - 04:07

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 Wed Apr 02, 2025 00:44:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818501710,0irq/46-4a10000010725-21runrttasks19:06:520
81850780,0irq/46-4a1000004372-21kworker/u2:821:28:080
81850770,0irq/46-4a1000005135-21seq22:45:430
81850760,0irq/46-4a10000026575-21rm22:19:300
81850760,0irq/46-4a10000017864-21ssh00:36:290
81850760,0irq/46-4a10000010894-21rm22:59:520
81850750,0irq/46-4a10000029994-21diskmemload22:41:030
81850750,0irq/46-4a10000014424-21ls21:50:050
81850750,0irq/46-4a10000012549-21ssh00:22:210
81850740,0irq/46-4a1000005595-21apt-get00:05:240
81850740,0irq/46-4a10000029994-21diskmemload23:18:090
81850740,0irq/46-4a10000029994-21diskmemload21:40:000
81850740,0irq/46-4a10000027383-21kworker/u2:421:00:330
81850730,0irq/46-4a1000003929-21latency_hist21:25:040
81850730,0irq/46-4a10000030890-21rm22:29:490
81850730,0irq/46-4a10000030003-21munin-run21:10:020
81850730,0irq/46-4a10000022826-21sshd23:28:230
81850730,0irq/46-4a10000020140-21kworker/u2:523:23:290
81850730,0irq/46-4a10000014852-21sh00:28:180
81850720,0irq/46-4a10000029370-21rm23:43:500
81850720,0irq/46-4a10000028095-21rm22:23:010
81850710,0irq/46-4a1000004372-21kworker/u2:821:51:360
81850710,0irq/46-4a100000317-21ssh21:16:290
81850710,0irq/46-4a10000031699-21kworker/u2:322:36:230
81850710,0irq/46-4a10000017969-21kworker/u2:220:05:020
81850710,0irq/46-4a10000014042-21ssh23:07:170
81850710,0irq/46-4a10000010965-21kworker/u2:623:53:240
81850700,0irq/46-4a1000004372-21kworker/u2:821:32:360
81850700,0irq/46-4a10000029994-21diskmemload23:58:050
81850700,0irq/46-4a10000026086-21sshd20:45:240
81850700,0irq/46-4a10000023110-1kworker/u3:320:35:320
81850700,0irq/46-4a10000019379-21kworker/u2:422:09:390
81850700,0irq/46-4a10000019379-21kworker/u2:422:01:580
81950690,0irq/47-4a1000009-21ksoftirqd/019:10:310
81850690,0irq/46-4a1000008496-21kworker/u2:000:12:060
81850690,0irq/46-4a10000031581-21ssh23:49:130
81850690,0irq/46-4a10000017963-21kworker/u2:123:40:050
81850680,0irq/46-4a1000007753-21kworker/u2:023:00:470
81850680,0irq/46-4a10000025286-21kworker/u2:022:32:190
212372680,0chrt20840-21kworker/u2:520:14:350
81850670,0irq/46-4a1000006475-21kworker/u2:500:18:120
81850670,0irq/46-4a10000023865-21sh22:12:500
81850670,0irq/46-4a10000015814-21kworker/u2:023:11:370
81950660,0irq/47-4a10000024356-21kworker/u2:223:32:560
81850660,0irq/46-4a1000008014-21runrttasks22:52:440
81850660,0irq/46-4a10000028115-21kworker/u2:521:15:050
81850660,0irq/46-4a10000010495-21kworker/u2:200:31:160
81850650,0irq/46-4a10000023107-21kworker/u2:220:30:010
11155996529,0cyclictest0-21swapper21:41:490
81850640,0irq/46-4a10000021843-21192.168.115.90-20:18:290
81850640,0irq/46-4a10000012840-21kworker/u2:219:18:040
81850640,0irq/46-4a1000000-21swapper00:04:220
81850620,0irq/46-4a10000011151-21cyclictest19:54:030
81850620,0irq/46-4a1000000-21swapper21:55:450
81850600,0irq/46-4a10000014969-21192.168.115.90-19:31:230
11155995630,0cyclictest0-21swapper20:55:190
11155995236,0cyclictest0-21swapper19:29:320
11155995126,0cyclictest0-21swapper20:41:100
11155995126,0cyclictest0-21swapper20:32:340
11155995033,0cyclictest17006-21latency_hist19:45:030
11155994934,0cyclictest19922-21latency_hist20:05:030
11155994933,0cyclictest22840-21latency_hist20:25:030
11155994930,0cyclictest16278-21latency_hist19:40:050
11155994836,0cyclictest81850irq/46-4a10000020:00:020
11155994832,0cyclictest26985-21runrttasks20:51:490
11155994830,0cyclictest2279-21lldpd19:24:180
11155994736,0cyclictest81850irq/46-4a10000019:40:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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