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2026-08-12 - 05:10

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 Wed Aug 12, 2026 00:44:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2593321140,3sleep30-21swapper/322:24:073
721321060,3sleep30-21swapper/320:09:083
721321060,3sleep30-21swapper/320:09:083
3149821060,4sleep10-21swapper/122:39:091
3149821060,4sleep10-21swapper/122:39:091
2782921020,3sleep30-21swapper/322:29:063
182652930,3sleep10-21swapper/122:04:071
182652930,3sleep10-21swapper/122:04:071
244322920,3sleep30-21swapper/320:54:073
168782730,2chrt16879-21awk20:34:060
245912720,3sleep30-21swapper/319:29:003
196552650,4sleep30-21swapper/322:09:003
196552650,4sleep30-21swapper/322:09:003
261032630,7sleep026107-21timerwakeupswit22:24:080
132602630,3sleep30-21swapper/323:18:593
132602630,3sleep30-21swapper/323:18:593
246922570,3chrt0-21swapper/323:49:023
28242560,3sleep02828-21grep21:24:020
83982540,2sleep10-21swapper/123:04:051
18983995343,5cyclictest0-21swapper/000:03:540
18983995343,5cyclictest0-21swapper/000:03:540
20132510,3chrt0-21swapper/122:48:581
20132510,3chrt0-21swapper/122:48:581
48192500,1sleep10-21swapper/121:29:021
124752490,3sleep30-21swapper/321:49:023
18983994638,5cyclictest0-21swapper/000:04:060
18983994638,5cyclictest0-21swapper/000:04:060
181812460,3sleep30-21swapper/322:04:053
181812460,3sleep30-21swapper/322:04:053
109882460,3chrt10989-21tune2fs00:39:011
109882460,3chrt10989-21tune2fs00:39:011
109882460,3chrt10989-21tune2fs00:39:011
262052440,3chrt0-21swapper/320:59:053
262052440,3chrt0-21swapper/320:59:053
186482430,2chrt18649-21missed_timers20:39:051
186482430,2chrt18649-21missed_timers20:39:051
112802430,5sleep110014-21/usr/sbin/munin21:44:091
112802430,5sleep110014-21/usr/sbin/munin21:44:091
163742400,3chrt0-21swapper/321:59:073
163742400,3chrt0-21swapper/321:59:073
97762370,3sleep20-21swapper/221:43:462
97762370,3sleep20-21swapper/221:43:462
18985993630,4cyclictest23897-21fschecks_time20:54:001
36732340,2sleep10-21swapper/100:19:041
36732340,2sleep10-21swapper/100:19:041
36732340,2sleep10-21swapper/100:19:041
18985993429,3cyclictest13428-21kworker/u9:2-xprtiod00:03:471
18985993429,3cyclictest13428-21kworker/u9:2-xprtiod00:03:471
18985993428,4cyclictest24751-21latency_hist22:23:461
18985993428,4cyclictest24751-21latency_hist22:23:461
18985993427,5cyclictest6908-21latency_hist00:28:521
18983993427,5cyclictest14565-21fschecks_time20:29:010
18983993427,5cyclictest14565-21fschecks_time20:29:010
18983993425,7cyclictest4528-21fschecks_count21:29:000
18985993328,3cyclictest429-21switchtime00:09:111
18985993328,3cyclictest429-21switchtime00:09:111
18985993328,3cyclictest0-21swapper/123:58:461
18985993327,4cyclictest547-21rs:main1
18985993327,4cyclictest547-21rs:main1
18985993326,5cyclictest17248-21gltestperf23:29:001
18985993326,5cyclictest13119-21unixbench_singl21:49:101
18985993324,7cyclictest23603-21latency_hist20:53:521
111992330,3chrt0-21swapper/300:39:033
111992330,3chrt0-21swapper/300:39:033
111992330,3chrt0-21swapper/300:39:033
18985993225,5cyclictest23673-21sshd19:24:351
18985993225,5cyclictest19985-21unixbench_multi23:34:091
18985993225,5cyclictest19985-21unixbench_multi23:34:091
18985993225,5cyclictest14778-21threads21:54:071
18983993223,7cyclictest25671-21fschecks_count20:59:000
18983993223,7cyclictest25671-21fschecks_count20:59:000
18983993220,10cyclictest18982-21cyclictest20:24:330
18985993124,5cyclictest7450-21kernelversion00:29:021
18985993124,5cyclictest7450-21kernelversion00:29:021
18985993122,7cyclictest3964-21cut22:54:001
18985993122,7cyclictest3964-21cut22:54:001
207692301,4sleep020829-21grep23:38:590
207692301,4sleep020829-21grep23:38:590
18985993025,4cyclictest30929-21cron21:13:461
18985993025,4cyclictest30929-21cron21:13:461
18983993025,3cyclictest31998-21gltestperf19:48:590
18983993025,3cyclictest12940-21latency_hist23:18:460
18983993025,3cyclictest12940-21latency_hist23:18:460
18983993024,4cyclictest29251-21latency22:34:030
18983993024,4cyclictest29251-21latency22:34:030
18983993022,6cyclictest30532-21netstat19:44:040
18983993022,6cyclictest18321-21processes22:04:080
18983993022,6cyclictest18321-21processes22:04:080
18983993022,6cyclictest13681-21apache222:39:510
18983993022,6cyclictest13681-21apache222:39:510
1898599294,19cyclictest30509-21irqstats00:04:031
1898599294,19cyclictest30509-21irqstats00:04:031
18985992923,5cyclictest26111-21latency_hist23:53:481
18985992923,5cyclictest2331-21threads00:14:081
18985992922,5cyclictest18982-21cyclictest21:36:511
18985992922,5cyclictest18982-21cyclictest21:36:511
18983992924,3cyclictest1248-21needreboot21:19:040
18983992924,3cyclictest1248-21needreboot21:19:040
96452280,2sleep19778-21mailstats00:34:071
96452280,2sleep19778-21mailstats00:34:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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