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2025-07-02 - 03:48

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 376 highest latencies:
System rack9slot8s.osadl.org (updated Wed Jul 02, 2025 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818501710,0irq/46-4a10000027532-21kworker/0:119:06:190
81850900,0irq/46-4a1000008535-21ssh00:20:490
81850870,0irq/46-4a10000024457-21ssh22:37:390
81850820,0irq/46-4a10000029931-21ssh23:57:420
66772810,0chrt5101-21kworker/u2:422:00:040
208872816,0sleep020893-21ssh23:38:320
81850800,0irq/46-4a1000008547-21ssh23:12:200
81950790,0irq/47-4a1000007225-21sshd23:09:460
81850790,0irq/46-4a10000030527-21ssh22:50:140
81850790,0irq/46-4a1000001976-21ssh00:07:100
81850790,0irq/46-4a10000018344-21sh23:33:050
81850790,0irq/46-4a10000014345-21ssh22:16:130
81850790,0irq/46-4a10000012205-21ssh22:11:500
37352797,0sleep03744-21ssh23:02:160
168192790,0chrt16101-21kworker/u2:621:13:210
81950780,0irq/47-4a10000014396-21rm00:33:200
81950770,0irq/47-4a10000026991-21ssh22:43:000
81950770,0irq/47-4a10000014440-21apt-get23:25:010
81850770,0irq/46-4a1000009883-21ssh23:15:050
81850770,0irq/46-4a10000016101-21kworker/u2:621:15:200
81850770,0irq/46-4a1000001185-21apt-get19:40:200
46282770,0chrt4364-21kworker/u2:800:12:410
322682777,0sleep032271-21ssh00:02:370
190262770,0chrt14404-21kworker/u2:222:26:080
81950760,0irq/47-4a1000009290-21seq20:31:260
81950760,0irq/47-4a100000760-21ssh21:47:490
81950760,0irq/47-4a1000005775-21kworker/u2:123:25:390
81850760,0irq/46-4a1000006588-21runrttasks00:16:470
81850760,0irq/46-4a10000028869-21sshd21:38:420
81850760,0irq/46-4a10000021748-21kworker/u2:019:15:010
81850760,0irq/46-4a10000015201-21runrttasks21:34:010
81850760,0irq/46-4a10000015173-21snmpd19:38:510
103362760,0chrt9504-21kworker/u2:622:07:560
81950750,0irq/47-4a10000019230-21kworker/u2:022:30:420
81950750,0irq/47-4a10000010053-21sshd20:36:400
81850750,0irq/46-4a10000027173-21ssh23:51:450
39282750,0chrt3850-21kworker/u2:419:56:370
81950740,0irq/47-4a10000027801-21kworker/u2:021:55:020
81950740,0irq/47-4a10000011251-21ls20:44:550
81850740,0irq/46-4a1000006570-21apt-get20:15:160
81850740,0irq/46-4a10000030533-21chrt21:42:070
231452740,0sleep08259-21kworker/u2:323:43:150
120942740,0sleep029505-21kworker/u2:000:28:270
81950730,0irq/47-4a10000028384-21ssh22:45:420
81950730,0irq/47-4a10000015173-21snmpd20:14:010
81950730,0irq/47-4a10000015173-21snmpd00:35:290
81850730,0irq/46-4a1000005101-21kworker/u2:422:20:120
286842730,0sleep028164-21kworker/u2:419:09:520
248832730,0chrt24700-21kworker/u2:123:46:530
14982730,0chrt21693-21kworker/u2:322:57:340
130392730,0chrt11811-21kworker/u2:320:55:170
81950720,0irq/47-4a1000008594-21kworker/u2:320:29:530
81950720,0irq/47-4a10000020640-21ssh21:21:150
81950720,0irq/47-4a10000012724-21sshd20:53:410
81950720,0irq/47-4a10000011811-21kworker/u2:320:49:540
81850720,0irq/46-4a10000027801-21kworker/u2:021:54:530
81850720,0irq/46-4a10000022953-21kworker/u2:021:27:210
319512720,0sleep030166-21kworker/u2:119:28:170
81950710,0irq/47-4a1000003608-21apt19:54:520
81950710,0irq/47-4a1000002587-21sshd19:47:370
81950710,0irq/47-4a10000011811-21kworker/u2:321:04:530
81950700,0irq/47-4a10000015173-21snmpd21:07:040
81950690,0irq/47-4a10000030307-1kworker/u3:619:23:460
81322690,0chrt4623-21kworker/u2:120:23:540
49732690,0chrt3695-21kworker/u2:320:03:540
81950670,0irq/47-4a10000032276-21runrttasks19:29:590
81950640,0irq/47-4a1000003849-1kworker/u3:320:06:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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