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2026-07-30 - 03:34

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 Thu Jul 30, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15625082710,2sleep3575-21kworker/3:2-events20:35:013
1475623994530,13cyclictest1742451-21fschecks_time23:37:560
1475623994511,21cyclictest0-21swapper/019:22:580
1475623994422,20cyclictest1627560-21diskstats21:42:560
1475632994332,8cyclictest1766384-21awk00:00:002
1475623994234,5cyclictest1507936-21kworker/u8:3+flush-8:019:52:570
1475623994226,14cyclictest0-21swapper/019:20:010
1475623994219,19cyclictest1602106-21latency_hist21:15:010
1475623994134,5cyclictest1542266-21latency_hist20:15:010
1475623994123,16cyclictest1796790-21apt-get00:32:520
1475632994032,6cyclictest1726707-21cp23:20:002
1475623994029,9cyclictest275-21systemd-journal23:10:010
1475623994024,14cyclictest1686873-21aten2_r5power_c22:42:570
15890642390,9sleep0141ktimers/021:03:020
1475623993930,7cyclictest1716481-21apt-get23:10:010
1475623993830,5cyclictest1681884-21/usr/sbin/munin22:38:110
1475623993821,15cyclictest0-21swapper/022:35:000
14710452384,10sleep10-21swapper/119:07:541
1475625993729,6cyclictest1777009-21/usr/sbin/munin00:13:151
1475623993724,11cyclictest1480524-21idleruntime-cro19:15:000
1475623993718,17cyclictest401-21dbus-daemon20:00:010
1475623993718,16cyclictest0-21swapper/021:07:530
1475623993713,21cyclictest1581723-21ntpq20:53:100
1475623993628,6cyclictest1755800-21ntpq23:48:030
1475623993628,6cyclictest1755800-21ntpq23:48:030
147562399362,30cyclictest1772081-21taskset00:07:570
147562399362,14cyclictest573-21runrttasks00:12:580
147562399360,12cyclictest1607469-21sshd21:22:250
147562399352,6cyclictest1670633-21ntpq22:23:070
147562399352,11cyclictest1781967-21apt-get00:17:540
147562399351,8cyclictest1766370-40ogrotate00:00:000
147562599349,17cyclictest1486681-21ld19:18:061
1475625993429,3cyclictest1614635-21kthreadcore21:28:031
1475623993426,6cyclictest1696243-21latency_hist22:50:000
1475623993426,6cyclictest1696243-21latency_hist22:50:000
147562399342,10cyclictest1700675-21ntpq22:53:060
1475623993418,14cyclictest1507463-21unixbench_multi19:38:120
147562399341,4cyclictest1747094-21apt-get23:42:550
1475623993414,18cyclictest1702500-21idleruntime22:57:580
1475623993413,17cyclictest1735926-21grep23:28:050
147562399341,12cyclictest1760702-21ntpq23:53:050
147562399341,10cyclictest1571591-21ntpq20:43:100
147562399341,10cyclictest1508177-21/usr/sbin/munin19:42:540
1475632993322,8cyclictest1671466-21cat22:25:012
1475625993329,3cyclictest1766365-21munin-run00:00:001
1475625993325,6cyclictest1776370-21grep00:08:191
147562399339,4cyclictest1543235-21grep20:17:580
147562399337,4cyclictest1582808-21/usr/sbin/munin20:57:530
147562399332,9cyclictest571-21snmpd20:22:550
1475623993327,4cyclictest1642157-21apt-get21:57:510
1475623993324,6cyclictest1621918-21latency_hist21:35:010
147562399331,9cyclictest1652426-21/usr/sbin/munin22:07:580
147562399331,8cyclictest1533239-21/usr/sbin/munin20:07:570
1475623993318,13cyclictest1641521-21unixbench_singl21:53:140
1475623993318,12cyclictest275-21systemd-journal23:31:250
1475623993317,14cyclictest0-21swapper/000:37:570
1475623993315,16cyclictest1606791-21unixbench_multi21:18:140
1475623993314,16cyclictest1795546-21needreboot00:28:050
147562599329,11cyclictest1619579-21ps21:33:021
1475625993228,2cyclictest0-21swapper/122:35:001
1475625993224,2cyclictest161rcu_preempt22:55:001
147562399323,7cyclictest1727308-21apt-get23:22:530
1475623993226,4cyclictest1771668-21latency_hist00:05:010
147562399321,9cyclictest1647091-21apt-get22:02:530
147562399321,9cyclictest1635989-21ntpq21:48:070
147562399321,9cyclictest1635989-21ntpq21:48:070
147562399321,9cyclictest1501627-21kthreadcore19:33:040
147562399321,6cyclictest1552860-21apt-get20:27:550
1475623993214,16cyclictest1657486-21sort22:12:590
1475623993212,18cyclictest401-21dbus-daemon23:05:010
1475623993211,5cyclictest1616235-21ntpq21:28:080
1475623993211,17cyclictest0-21swapper/019:10:010
147562399320,9cyclictest1576609-21/usr/sbin/munin20:48:130
147562399320,9cyclictest1576609-21/usr/sbin/munin20:48:130
147562599318,15cyclictest1655587-21ls22:08:041
1475625993127,3cyclictest1711552-21systemd-run23:05:011
1475625993127,2cyclictest1608248-21irqrtprio21:23:001
1475625993127,2cyclictest1476577-21irqcore19:13:011
147562399318,6cyclictest1675213-21cut22:28:050
147562399311,9cyclictest1725779-21/usr/sbin/munin23:18:050
147562399311,9cyclictest1626118-21ntpq21:38:060
147562399311,9cyclictest1497328-21/usr/sbin/munin19:28:110
1475623993114,14cyclictest0-21swapper/022:17:560
1475623993112,17cyclictest1559656-21kthreadcore20:33:020
147562399311,12cyclictest1516930-21ntpq19:48:080
1475623993110,19cyclictest0-21swapper/020:02:580
1475632993025,3cyclictest1587056-21unixbench_singl20:58:132
1475632993024,4cyclictest1746416-21unixbench_singl23:38:122
147562599308,10cyclictest1800199-21cut00:33:031
147562599307,15cyclictest1725925-21ld23:18:081
147562599306,11cyclictest1770062-21cut00:03:061
147562399303,3cyclictest0-21swapper/020:37:540
1475623993019,9cyclictest1787150-21diskstats00:22:590
147562599298,10cyclictest1628327-21cut21:43:001
1475625992920,6cyclictest1626825-21latency_hist21:40:011
1475625992919,2cyclictest161rcu_preempt22:43:141
1475632992824,2cyclictest1552917-21aten2_r5power_e20:27:552
1475632992823,3cyclictest1505365-21kthreadcore19:38:032
147562599287,10cyclictest1792779-21cut00:28:011
147562599287,10cyclictest1748050-21cut23:43:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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