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2025-11-24 - 09:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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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  Intel
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: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Mon Nov 24, 2025 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12752662860,3chrt586-21kworker/3:2-events19:56:203
14677562720,3sleep20-21swapper/223:11:182
14677562720,3sleep20-21swapper/223:11:182
12651562640,6chrt0-21swapper/219:46:202
1226706995953,4cyclictest1253576-21kworker/u8:4+flush-8:019:41:340
1226711995851,5cyclictest1238262-21kworker/u8:2+flush-8:021:10:001
1226706995645,8cyclictest282-21systemd-journal22:39:590
1226711995441,10cyclictest1466844-21latency_hist23:10:011
1226711995437,15cyclictest1437295-21/usr/sbin/munin22:41:211
1226711995344,6cyclictest1287958-21latency_hist20:10:011
1226706995345,6cyclictest1303038-21kworker/u8:1+flush-8:021:51:270
1226706995343,7cyclictest1416335-21ntpq22:16:230
1226711995233,16cyclictest1257492-21ntpq19:36:231
1226706995247,4cyclictest1387318-21kworker/u8:0+flush-8:022:31:270
1226706995246,4cyclictest1238262-21kworker/u8:2+flush-8:022:51:260
1226711995141,8cyclictest1417538-21/usr/sbin/munin22:21:211
1226706994938,9cyclictest1282224-21ntpq20:01:240
1226706994840,6cyclictest1326930-21ntpq20:46:250
1226715994741,4cyclictest1303038-21kworker/u8:1+flush-8:021:46:272
1226711994729,15cyclictest1352809-21apt-get21:16:081
1226706994737,7cyclictest282-21systemd-journal22:56:210
1226706994736,8cyclictest1401357-21ntpq22:01:270
1226711994637,7cyclictest1268539-21/usr/sbin/munin19:51:281
1226711994636,8cyclictest1248718-21apt-get19:31:111
1226711994636,7cyclictest1520418-21ntpq00:01:241
1226706994639,5cyclictest1247502-21ntpq19:26:240
1226711994528,15cyclictest1338005-21apt-get21:01:121
1226711994528,15cyclictest1338005-21apt-get21:01:121
1226711994525,17cyclictest282-21systemd-journal23:24:211
1226706994435,6cyclictest1382133-21latency_hist21:45:010
1226706994434,8cyclictest1242621-21ntpq19:21:260
1226711994336,5cyclictest1278075-21latency_hist20:00:011
1226711994333,8cyclictest1366463-21ntpq21:26:251
1226706994338,4cyclictest383363-21kworker/u8:1+flush-8:019:11:290
1226706994335,6cyclictest1253346-21latency_hist19:35:010
1226706994333,8cyclictest1292134-21ntpq20:11:250
1226706994333,7cyclictest282-21systemd-journal00:01:220
12453662420,4sleep1281rcuc/119:26:191
1226711994234,5cyclictest1491554-21latency_hist23:35:011
1226711994224,15cyclictest282-21systemd-journal00:30:421
1226706994238,3cyclictest1303038-21kworker/u8:1+events_unbound21:56:250
1226706994237,3cyclictest1238262-21kworker/u8:2+flush-8:020:56:260
1226706994234,6cyclictest1311837-21ntpq20:31:220
1226706994233,7cyclictest1382679-21/usr/sbin/munin21:46:220
1226711994124,14cyclictest1382136-21apt-get21:45:011
1226706994131,8cyclictest1545139-21ntpq00:26:240
1226706994130,9cyclictest1238262-21kworker/u8:2+flush-8:021:26:320
1226711994032,6cyclictest1267412-21ntpq19:46:251
1226711994029,7cyclictest282-21systemd-journal20:23:501
1226706994035,4cyclictest1387318-21kworker/u8:0+flush-8:022:11:310
12257302403,30sleep01225759-21ntpq19:06:250
12257302403,30sleep01225759-21ntpq19:06:250
14333502390,5sleep30-21swapper/322:36:203
13418452390,4sleep2371rcuc/221:01:282
13418452390,4sleep2371rcuc/221:01:282
1226715993934,4cyclictest1238262-21kworker/u8:2+flush-8:020:46:152
1226715993933,4cyclictest1407107-21gpgv22:10:002
1226711993929,7cyclictest1372593-21/usr/sbin/munin21:36:231
1226711993927,10cyclictest1525287-21needreboot00:06:251
1226711993832,4cyclictest1313040-21apt-get20:36:111
1226706993833,3cyclictest1238262-21kworker/u8:2+flush-8:021:21:280
1226711993727,8cyclictest1328405-21fschecks_time20:51:151
1226711993727,8cyclictest1282681-21unixbench_multi20:01:301
1226711993719,16cyclictest1391909-21unixbench_multi21:51:301
1226706993733,3cyclictest1238262-21kworker/u8:2+events_unbound21:16:290
1226706993731,4cyclictest1253576-21kworker/u8:4+events_unbound19:56:140
1226706993730,5cyclictest1475941-21kworker/u8:0+flush-8:000:06:320
1226706993727,8cyclictest1550057-21ntpq00:31:240
1226715993631,4cyclictest1530647-21kworker/u8:2+events_unbound00:21:262
1226715993627,6cyclictest282-21systemd-journal22:25:012
1226715993624,9cyclictest1407496-21cat22:10:012
1226711993629,5cyclictest1237571-21ntpq19:16:221
1226711993623,11cyclictest1327779-21systemd-run20:49:591
1226711993623,11cyclictest0-21swapper/119:41:321
1226706993631,4cyclictest1238262-21kworker/u8:2+flush-8:022:06:250
1226706993630,4cyclictest1387318-21kworker/u8:0+flush-8:022:21:280
122671199354,5cyclictest0-21swapper/123:41:101
1226711993526,7cyclictest1230736-21ntpq19:11:251
1226711993517,16cyclictest0-21swapper/122:56:201
1226706993527,6cyclictest1475941-21kworker/u8:0+events_unbound23:41:310
1226706993525,8cyclictest1303038-21kworker/u8:1+flush-8:021:36:340
12219342353,27sleep10-21swapper/119:05:421
12219342353,27sleep10-21swapper/119:05:421
1226711993423,9cyclictest1312397-21unixbench_singl20:31:291
1226711993419,13cyclictest1462031-21latency_hist23:05:011
1226711993417,15cyclictest1321733-21ntp_kernel_err20:41:231
1226706993430,3cyclictest1303038-21kworker/u8:1+flush-8:020:26:150
1226706993429,4cyclictest1436701-21kworker/u8:3+events_unbound23:11:290
1226706993429,4cyclictest1436701-21kworker/u8:3+events_unbound23:11:290
1226706993429,4cyclictest1253576-21kworker/u8:4+flush-8:020:21:290
1226706993428,4cyclictest1238262-21kworker/u8:2+flush-8:020:16:210
1226706993425,6cyclictest1556057-21latency_hist00:40:010
1226706993425,6cyclictest1238262-21kworker/u8:2+flush-8:019:46:240
1226711993319,12cyclictest1372303-21systemd-run21:35:011
1226706993328,4cyclictest1169336-21kworker/u8:3+events_unbound19:16:270
1226706993327,4cyclictest1446004-21ntpq22:46:210
1226706993325,6cyclictest1436701-21kworker/u8:3+events_unbound23:16:210
1226715993228,3cyclictest1530647-21kworker/u8:2+flush-8:000:26:302
1226715993228,3cyclictest1238262-21kworker/u8:2+flush-8:021:31:282
1226715993224,6cyclictest1476927-21cat23:20:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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