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2025-07-16 - 00:30

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 50 highest latencies:
System rack9slot8s.osadl.org (updated Tue Jul 15, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818501700,0irq/46-4a10000027613-21kworker/0:307:05:000
81850880,0irq/46-4a1000001527-21sshd12:09:420
81850850,0irq/46-4a10000030989-21runrttasks09:44:360
81950840,0irq/47-4a10000015173-21snmpd09:11:460
81850830,0irq/46-4a10000023701-21seq10:38:280
81850830,0irq/46-4a10000014662-21diskmemload11:08:080
81950820,0irq/47-4a10000013477-21ssh12:34:590
81850810,0irq/46-4a10000020517-21ssh09:22:020
81950800,0irq/47-4a1000009510-21ssh12:26:230
81950800,0irq/47-4a10000010637-21awk11:19:590
81850800,0irq/46-4a10000022252-21sshd11:44:400
81950790,0irq/47-4a100000960-21ssh10:59:180
81950790,0irq/47-4a1000009076-21apt-get08:34:520
81950790,0irq/47-4a1000007144-21kworker/u2:408:34:570
81950790,0irq/47-4a10000032409-21cron07:34:500
81850790,0irq/46-4a1000008869-21runrttasks10:06:360
81850790,0irq/46-4a1000007228-21ssh11:12:370
81850790,0irq/46-4a10000030821-21runrttasks10:53:420
81850790,0irq/46-4a10000028901-21chrt11:58:500
81850790,0irq/46-4a10000026983-21ssh09:35:510
81850790,0irq/46-4a10000026386-21ssh11:53:280
81850790,0irq/46-4a10000020914-21runrttasks10:32:260
81850790,0irq/46-4a10000019552-21ssh10:29:360
81850790,0irq/46-4a10000013998-21ssh11:26:570
81950780,0irq/47-4a10000030232-21sendmail-msp07:19:500
81950780,0irq/47-4a10000024087-21ssh11:48:320
81950780,0irq/47-4a10000019583-21runrttasks11:38:580
81950780,0irq/47-4a1000001768-21ssh12:10:040
81950780,0irq/47-4a10000012676-21ssh10:14:550
81850780,0irq/46-4a1000007796-21ssh10:04:260
81850780,0irq/46-4a100000307-21ssh09:48:230
81850780,0irq/46-4a10000017119-21ssh11:33:410
81850780,0irq/46-4a10000015766-21ssh12:39:480
60612780,0chrt4949-21kworker/u2:612:19:210
252712780,0chrt25114-21kworker/u2:209:32:140
14172780,0chrt1015-21kworker/u2:307:44:290
81950770,0irq/47-4a1000006467-21runrttasks08:16:510
81950770,0irq/47-4a10000025691-21sshd10:42:390
81950770,0irq/47-4a10000015173-21snmpd12:02:520
81850770,0irq/46-4a10000027810-21ssh10:47:100
81850770,0irq/46-4a1000002566-21ssh11:02:370
81850770,0irq/46-4a10000018253-21ssh09:17:130
81850770,0irq/46-4a10000010630-21apt-get11:20:490
49042770,0chrt2941-21kworker/u2:308:06:090
234492770,0chrt8640-21kworker/u2:609:28:230
81950760,0irq/47-4a1000006105-21apt08:14:510
81950760,0irq/47-4a1000002649-21sshd07:52:330
81950760,0irq/47-4a10000015180-21lldpd07:46:320
81950760,0irq/47-4a10000013887-21ssh10:17:240
81850760,0irq/46-4a10000031834-21kworker/u2:010:24:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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