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2025-07-04 - 02:13

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 all highest latencies:
System rack9slot8s.osadl.org (updated Thu Jul 03, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818501840,0irq/46-4a1000007402-21kworker/0:007:07:260
81850850,0irq/46-4a1000008406-21sshd10:48:100
81850800,0irq/46-4a10000010946-21runrttasks09:45:040
81850780,0irq/46-4a1000007094-21runrttasks09:37:020
81850780,0irq/46-4a10000026418-21ssh10:17:440
81850780,0irq/46-4a10000015092-21ssh09:53:570
81850770,0irq/46-4a1000005253-21ssh09:33:110
81850760,0irq/46-4a10000028357-21ssh12:39:090
81850760,0irq/46-4a10000024509-21ssh11:21:590
81850760,0irq/46-4a10000019436-21kworker/u2:011:14:320
81850760,0irq/46-4a10000015874-21ssh12:12:160
81850760,0irq/46-4a10000012230-21ssh10:56:050
81850750,0irq/46-4a1000009929-21ssh09:43:020
81850750,0irq/46-4a10000028116-21ssh10:21:120
81850740,0irq/46-4a1000006607-21ssh10:44:250
81850740,0irq/46-4a1000003541-21ssh11:46:110
81850730,0irq/46-4a1000007745-21kworker/u2:211:00:160
81850730,0irq/46-4a10000032727-21ssh10:30:410
81850720,0irq/46-4a10000025179-21runrttasks12:32:130
81850710,0irq/46-4a10000017012-21kworker/u2:311:08:060
81850710,0irq/46-4a10000015201-21runrttasks11:40:460
81850700,0irq/46-4a10000031551-21kworker/u2:312:03:590
81850700,0irq/46-4a10000015173-21snmpd12:24:470
81850700,0irq/46-4a10000011641-21wc10:55:020
81850690,0irq/46-4a1000005921-21kworker/u2:011:51:250
81850690,0irq/46-4a100000502-21kworker/u2:611:58:000
81850690,0irq/46-4a10000029138-21kworker/u2:111:33:150
81850690,0irq/46-4a10000026581-21ssh11:26:220
81850690,0irq/46-4a10000025389-21kworker/u2:409:25:560
81850690,0irq/46-4a10000020432-21kworker/u2:212:27:330
81850690,0irq/46-4a10000019480-21kworker/u2:509:24:020
81850690,0irq/46-4a10000019369-21chrt08:20:200
81850690,0irq/46-4a10000014742-21cron12:09:590
8198996832,0cyclictest0-21swapper09:15:450
81850680,0irq/46-4a10000030356-21runrttasks10:25:450
81850680,0irq/46-4a10000021845-21kworker/u2:211:36:420
81850680,0irq/46-4a10000018797-21kworker/u2:610:03:050
81850680,0irq/46-4a10000018022-21kworker/u2:012:17:450
81950670,0irq/47-4a1000004542-21sendmail-msp10:39:580
81850670,0irq/46-4a10000027381-21kworker/u2:009:12:200
81850660,0irq/46-4a10000021221-21kworker/u2:110:11:420
81850660,0irq/46-4a10000011490-21kworker/u2:209:56:300
81850650,0irq/46-4a10000021857-21kworker/u2:311:19:240
127302650,0sleep09667-21kworker/u2:107:37:250
101650,0ktimersoftd/021993-21ssh10:08:270
81850640,0irq/46-4a1000009-21ksoftirqd/007:16:390
8198995845,0cyclictest81850irq/46-4a10000008:39:560
8198995828,0cyclictest0-21swapper07:29:500
8198995725,0cyclictest0-21swapper08:18:500
8198995544,0cyclictest81850irq/46-4a10000009:09:530
8198995544,0cyclictest81850irq/46-4a10000007:12:420
8198995532,0cyclictest23448-21runrttasks08:48:300
8198995524,0cyclictest17529-21latency_hist08:09:520
81850550,0irq/46-4a1000000-21swapper07:41:400
8198995443,0cyclictest81850irq/46-4a10000008:44:110
8198995443,0cyclictest81850irq/46-4a10000007:32:230
81850540,0irq/46-4a1000000-21swapper08:32:530
81850540,0irq/46-4a1000000-21swapper07:59:500
8198995326,0cyclictest17657-21seq08:10:120
8198995231,0cyclictest0-21swapper07:54:500
8198995140,0cyclictest81850irq/46-4a10000007:23:190
8198995132,0cyclictest16343-21runrttasks08:01:270
8198995126,0cyclictest13927-21sshd07:45:000
8198995041,0cyclictest101ktimersoftd/008:50:590
8198995035,0cyclictest24622-21sshd08:56:050
8198994924,0cyclictest20278-21runrttasks08:26:440
8198994823,0cyclictest25701-21seq09:03:430
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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