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2026-07-28 - 23:08

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 Tue Jul 28, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2513021170,3sleep20-21swapper/211:23:452
2513021170,3sleep20-21swapper/211:23:452
1639021130,3chrt0-21swapper/310:58:543
1639021130,3chrt0-21swapper/310:58:543
2230821060,3chrt0-21swapper/208:23:432
64012970,2sleep20-21swapper/209:08:332
64012970,2sleep20-21swapper/209:08:332
64012970,2sleep20-21swapper/209:08:332
81342890,1sleep00-21swapper/012:03:510
135462810,2chrt13542-21ntpq07:58:530
135462810,2chrt13542-21ntpq07:58:530
190942710,2chrt17885-21/usr/sbin/munin09:38:590
171692610,6chrt17173-21gltestperf12:28:470
303532580,3chrt30347-21gzip08:43:510
303532580,3chrt30347-21gzip08:43:510
132832560,3sleep00-21swapper/009:23:550
132832560,3sleep00-21swapper/009:23:550
326102550,3sleep30-21swapper/308:48:573
326102550,3sleep30-21swapper/308:48:573
123002550,3chrt544-21lldpd07:54:510
123002550,3chrt544-21lldpd07:54:510
27442490,4sleep20-21swapper/210:23:472
27442490,4sleep20-21swapper/210:23:472
113992490,3sleep20-21swapper/207:53:482
113992490,3sleep20-21swapper/207:53:482
219172460,3sleep30-21swapper/309:48:473
219172460,3sleep30-21swapper/309:48:473
219172460,3sleep30-21swapper/309:48:473
134822440,3chrt0-21swapper/307:58:523
134822440,3chrt0-21swapper/307:58:523
227222430,9sleep0171ktimers/009:48:560
227222430,9sleep0171ktimers/009:48:560
227222430,9sleep0171ktimers/009:48:560
170042430,3sleep30-21swapper/312:28:463
60582420,2chrt0-21swapper/207:38:532
60582420,2chrt0-21swapper/207:38:532
205742400,3sleep00-21swapper/009:43:530
205742400,3sleep00-21swapper/009:43:530
38942390,3sleep03688-21/usr/sbin/munin11:53:460
38942390,3sleep03688-21/usr/sbin/munin11:53:460
199962390,2sleep120015-21ntp_states11:08:531
199962390,2sleep120015-21ntp_states11:08:531
22682380,4sleep10-21swapper/110:23:421
22682380,4sleep10-21swapper/110:23:421
123832380,4sleep20-21swapper/209:23:452
123832380,4sleep20-21swapper/209:23:452
297232360,1sleep129794-21tail10:08:521
297232360,1sleep129794-21tail10:08:521
28753993628,6cyclictest25134-21latency_hist09:58:331
28753993628,6cyclictest25134-21latency_hist09:58:331
28753993628,5cyclictest6330-21threads07:38:561
28753993628,5cyclictest6330-21threads07:38:561
51232350,1sleep15147-21latency_hist07:38:371
28752993529,4cyclictest8847-21sh07:48:330
28752993529,4cyclictest8847-21sh07:48:330
2875299347,10cyclictest16243-21/usr/sbin/munin10:58:510
2875299347,10cyclictest16243-21/usr/sbin/munin10:58:510
28753993326,5cyclictest27568-21latency_hist08:38:371
28753993326,5cyclictest27568-21latency_hist08:38:371
28753993325,6cyclictest17578-21netstat12:28:511
28752993328,3cyclictest0-21swapper/010:43:330
28752993328,3cyclictest0-21swapper/010:43:330
28752993327,4cyclictest16164-21fschecks_count09:33:450
28752993327,4cyclictest16164-21fschecks_count09:33:450
28752993323,7cyclictest171ktimers/009:03:080
28753993225,5cyclictest24004-21threads11:18:551
28753993225,5cyclictest24004-21threads11:18:551
28752993226,5cyclictest24657-21latency_hist11:23:330
28752993226,5cyclictest24657-21latency_hist11:23:330
28752993226,4cyclictest11357-21switchtime09:18:540
28752993226,4cyclictest11357-21switchtime09:18:540
28752993225,4cyclictest0-21swapper/010:35:000
28752993225,4cyclictest0-21swapper/010:35:000
28752993224,6cyclictest30507-21/usr/sbin/munin11:38:530
28752993224,6cyclictest30507-21/usr/sbin/munin11:38:530
28752993217,13cyclictest0-21swapper/011:13:470
28753993126,2cyclictest0-21swapper/110:03:111
28753993126,2cyclictest0-21swapper/110:03:111
28753993125,4cyclictest21970-21latency_hist08:23:331
28753993125,4cyclictest21970-21latency_hist08:23:331
28753993124,5cyclictest18620-21fschecks_count08:13:461
28753993124,5cyclictest18620-21fschecks_count08:13:461
28753993123,6cyclictest28747-21cyclictest11:33:561
28753993123,6cyclictest28747-21cyclictest11:33:561
28752993126,3cyclictest22854-21needreboot08:23:490
28752993125,4cyclictest735-21systemd-logind11:28:550
28752993125,4cyclictest735-21systemd-logind11:28:550
28752993125,4cyclictest0-21swapper/008:48:550
28752993125,4cyclictest0-21swapper/008:48:550
28752993124,5cyclictest31193-21cut10:13:460
28752993124,5cyclictest31193-21cut10:13:460
28752993118,11cyclictest0-21swapper/010:18:460
28752993118,11cyclictest0-21swapper/010:18:460
28753993023,5cyclictest550-21cron09:28:421
28753993023,5cyclictest550-21cron09:28:421
28753993021,7cyclictest17617-21fschecks_time11:03:461
28753993021,7cyclictest17617-21fschecks_time11:03:461
2875299305,10cyclictest30193-21cat10:08:570
2875299305,10cyclictest30193-21cat10:08:570
2875299304,9cyclictest2046-21sed08:53:550
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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