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2026-08-07 - 16:25

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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 here to display the system's profile data or here to proceed to next system.
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: 100 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 100 highest latencies:
System rack4slot1s.osadl.org (updated Fri Aug 07, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
247872680,6chrt24784-21grep11:39:050
247872680,6chrt24784-21grep11:39:050
6542600,1sleep00-21swapper/012:03:540
6542600,1sleep00-21swapper/012:03:540
209832590,2sleep121109-21users11:29:061
209832590,2sleep121109-21users11:29:061
30892510,2chrt0-21swapper/210:43:562
30892510,2chrt0-21swapper/210:43:562
314872500,4sleep0201rcuc/007:38:580
314872500,4sleep0201rcuc/007:38:580
312032480,4sleep20-21swapper/209:04:022
312032480,4sleep20-21swapper/209:04:022
187362450,3sleep00-21swapper/011:24:020
187362450,3sleep00-21swapper/011:24:020
23662440,3sleep30-21swapper/309:14:003
23662440,3sleep30-21swapper/309:14:003
21973994113,18cyclictest11824-21chrt11:05:010
64292400,2sleep2351rcuc/212:18:552
64292400,2sleep2351rcuc/212:18:552
64292400,2sleep2351rcuc/212:18:552
21973994029,9cyclictest700-21192.168.115.40-manager11:44:100
21973994029,9cyclictest700-21192.168.115.40-manager11:44:100
21973994014,10cyclictest4649-21seq10:48:440
21973994014,10cyclictest4649-21seq10:48:440
263962390,3sleep00-21swapper/010:18:580
263962390,3sleep00-21swapper/010:18:580
21973993928,8cyclictest700-21192.168.115.40-manager11:35:250
21973993913,16cyclictest6849-21chrt09:25:510
21973993913,16cyclictest6849-21chrt09:25:510
108812390,3chrt0-21swapper/309:38:453
271832380,1sleep00-21swapper/007:28:530
21974993828,7cyclictest2143-21latency_hist07:48:461
21973993829,7cyclictest30471-21fschecks_count09:03:540
21973993829,7cyclictest30471-21fschecks_count09:03:540
21973993811,18cyclictest13921-21taskset11:12:430
21973993726,9cyclictest700-21192.168.115.40-manager10:34:080
21973993713,8cyclictest31460-21cat10:33:440
21973993713,8cyclictest31460-21cat10:33:440
21973993711,16cyclictest13088-21chrt12:34:410
21973993711,15cyclictest25652-21runrttasks10:16:530
21973993711,15cyclictest25652-21runrttasks10:16:530
21973993711,11cyclictest9755-21date12:28:450
21973993711,11cyclictest9755-21date12:28:450
21973993629,5cyclictest775-21threads09:09:020
21973993629,5cyclictest775-21threads09:09:020
21973993624,9cyclictest700-21192.168.115.40-manager10:13:380
21973993612,11cyclictest29364-21runrttasks10:26:210
21973993612,11cyclictest29364-21runrttasks10:26:210
21973993610,11cyclictest14678-21systemd-journal07:34:480
123752360,3sleep20-21swapper/209:39:442
123752360,3sleep20-21swapper/209:39:442
65722350,2chrt0-21swapper/210:53:452
65722350,2chrt0-21swapper/210:53:452
21974993529,4cyclictest5372-21latency10:48:571
21974993529,4cyclictest5372-21latency10:48:571
2197399359,12cyclictest9830-21sed10:59:050
2197399359,12cyclictest9830-21sed10:59:050
2197399359,12cyclictest8231-21taskset10:57:210
2197399358,10cyclictest749-21runrttasks08:21:470
2197399358,10cyclictest749-21runrttasks08:21:470
21973993529,4cyclictest749-21runrttasks09:18:510
21973993529,4cyclictest749-21runrttasks09:18:510
21973993512,10cyclictest32419-21taskset12:00:180
21973993512,10cyclictest32419-21taskset12:00:180
21973993511,7cyclictest2320-21strings09:13:590
21973993511,7cyclictest2320-21strings09:13:590
21973993511,7cyclictest16936-21taskset08:27:350
30422340,3sleep30-21swapper/307:49:023
21974993426,6cyclictest21966-21cyclictest10:53:571
21973993412,9cyclictest30652-21chrt11:56:300
21973993412,9cyclictest30652-21chrt11:56:300
21973993411,9cyclictest20724-21chrt08:38:240
21973993411,8cyclictest2226-21/usr/sbin/munin07:48:560
21973993410,8cyclictest12611-21taskset09:42:490
21973993410,8cyclictest12611-21taskset09:42:490
21973993410,8cyclictest0-21swapper/012:30:300
21973993410,8cyclictest0-21swapper/012:30:300
2197399339,8cyclictest0-21swapper/008:12:580
2197399339,11cyclictest4474-21basename07:53:550
2197399339,10cyclictest17961-21/usr/sbin/munin08:29:010
2197399338,8cyclictest0-21swapper/008:54:260
21973993318,12cyclictest11808-21fschecks_time08:13:550
2197399329,11cyclictest29465-21find08:59:020
2197399329,11cyclictest29465-21find08:59:020
2197399327,8cyclictest4834-21cpu10:48:530
2197399327,8cyclictest4834-21cpu10:48:530
21973993225,5cyclictest21966-21cyclictest10:43:000
21973993225,5cyclictest21966-21cyclictest10:43:000
21973993224,6cyclictest15027-21fschecks_time09:48:550
21973993217,11cyclictest8045-21ntp_states09:29:000
21974993126,3cyclictest6863-21ntp_offset12:19:041
21974993126,3cyclictest6863-21ntp_offset12:19:041
21974993126,3cyclictest6863-21ntp_offset12:19:041
21974993123,6cyclictest10244-21kernelversion08:09:011
21974993122,7cyclictest6447-21threads09:24:041
21974993122,7cyclictest6447-21threads09:24:041
2197399319,8cyclictest9284-21taskset08:05:390
2197399319,8cyclictest9284-21taskset08:05:390
2197399318,10cyclictest28606-21runrttasks11:49:070
2197399318,10cyclictest28606-21runrttasks11:49:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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