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2026-04-16 - 01:57

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #6

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 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: 50 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack4slot6s.osadl.org (updated Thu Apr 16, 2026 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1144022480,2sleep011443-21missed_timers21:30:190
1784821770,3sleep017849-21grep00:00:240
718221530,3sleep07181-21grep23:20:100
1432121350,3chrt14323-21processes19:35:240
1821821220,4chrt18221-21processes19:50:240
851721210,3sleep08519-21basename21:20:000
2487821210,4chrt24877-21/usr/sbin/munin20:15:290
1649921200,2sleep016500-21cat21:50:120
1495621170,4chrt14957-21cpu23:50:110
1956521140,3chrt19563-21users22:00:290
1040821140,4sleep010406-21ntp_states19:20:230
1687521110,3chrt288-21snmpd23:56:070
2672821080,3chrt26731-21missed_timers00:35:190
297212960,3sleep029790-21switchtime22:40:250
11182950,3sleep01186-21switchtime22:55:270
45092940,3sleep04505-21cat23:10:020
81192740,2sleep08116-21vmstat19:10:300
660627218,30sleep06671-21mailstats19:05:240
94702683,5sleep00-21swapper21:22:130
239982665,50sleep0288-21snmpd20:13:430
225642650,2sleep022565-21modprobe00:20:000
7413996425,15cyclictest1-21systemd22:20:260
7413996311,21cyclictest20717-21ntp_states20:00:210
741399618,19cyclictest12342-21/usr/sbin/munin23:40:180
7413996132,22cyclictest22914-21latency_hist20:10:020
7413996123,13cyclictest2431-21ntp_offset20:55:200
741399608,17cyclictest9751-21chrt23:30:110
7413996035,14cyclictest1368-21/usr/sbin/munin20:50:280
7413996010,18cyclictest20074-21/usr/sbin/munin00:10:250
741399599,18cyclictest11399-21/usr/sbin/munin19:25:250
741399599,17cyclictest31867-21/usr/sbin/munin22:50:280
741399598,18cyclictest17662-21/usr/sbin/munin21:55:130
741399597,18cyclictest25428-21/usr/sbin/munin22:25:130
7413995935,14cyclictest24228-21/usr/sbin/munin00:25:200
7413995933,16cyclictest31172-21/usr/sbin/munin20:40:240
7413995911,20cyclictest17171-21sshd19:45:330
741399587,17cyclictest16442-21sshd19:45:000
7413995833,16cyclictest30661-21/usr/sbin/munin22:45:140
7413995833,15cyclictest19105-21/usr/sbin/munin00:05:220
7413995833,15cyclictest13875-21/usr/sbin/munin23:45:180
7413995832,17cyclictest6640-21runrttasks21:10:280
7413995830,20cyclictest0-21swapper20:20:100
7413995810,15cyclictest2292-21ntp_states23:00:230
741399579,18cyclictest4080-21sshd21:00:330
741399579,17cyclictest21874-21/usr/sbin/munin22:10:240
741399578,18cyclictest20783-21/usr/sbin/munin22:05:270
741399577,18cyclictest5858-21/usr/sbin/munin23:15:140
7413995735,15cyclictest15391-21/usr/sbin/munin21:45:210
7413995733,14cyclictest13941-21latency_hist19:35:010
7413995732,16cyclictest12585-21/usr/sbin/munin21:35:140
7413995732,15cyclictest10033-21/usr/sbin/munin21:25:150
7413995731,16cyclictest4929-21/usr/sbin/munin23:10:230
7413995728,21cyclictest29715-21/usr/sbin/munin20:35:200
7413995723,11cyclictest13964-21latency21:40:150
7413995722,22cyclictest23106-21ntpq22:15:200
741399569,15cyclictest11323-21ntp_states23:35:200
741399568,16cyclictest26714-21/usr/sbin/munin22:30:160
741399568,15cyclictest19120-21/usr/sbin/munin19:55:250
741399567,18cyclictest8465-21/usr/sbin/munin23:25:250
7413995610,15cyclictest9976-21munin-run19:20:000
741399559,17cyclictest28232-21df_inode20:30:130
741399559,13cyclictest5268-21sed21:05:270
741399558,16cyclictest27162-21awk20:25:200
7413995532,15cyclictest32128-21/usr/sbin/munin20:45:130
7413995519,12cyclictest25246-21/usr/sbin/munin00:30:190
741399548,12cyclictest27995-21/usr/sbin/munin22:35:180
7413995431,15cyclictest22825-21irqstats00:20:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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