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2026-04-05 - 07:55

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #7

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: 50.5 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 highest latencies:
System rack5slot7s.osadl.org (updated Sun Apr 05, 2026 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21553224392199,98sleep00-21swapper19:09:570
216049916515,127cyclictest15642-21apt-get21:45:230
216049916115,107cyclictest31234-21apt-get20:06:580
216049916113,122cyclictest22329-21head19:11:200
21604991589,124cyclictest7940-21/usr/sbin/munin21:00:130
216049915818,115cyclictest30142-21users23:11:070
216049915817,21cyclictest3529-21apt-get23:50:250
21604991579,124cyclictest272-21snmpd20:36:000
216049915738,24cyclictest31827-21latency_hist23:25:030
216049915723,27cyclictest11181-21apt-get21:20:300
216049915720,31cyclictest9175-21users00:21:070
216049915712,122cyclictest28194-21grep19:45:560
216049915614,102cyclictest31337-21latency_hist20:05:090
216049915613,118cyclictest19844-21apt-get22:10:200
216049915612,119cyclictest2103-21memory23:40:430
21604991559,119cyclictest5949-21sed00:01:030
216049915518,39cyclictest11142-21memory00:35:430
216049915518,27cyclictest9533-21apt-get21:10:200
216049915517,23cyclictest14699-21munin-run21:40:020
216049915517,112cyclictest31910-21apt-get23:25:180
216049915515,24cyclictest15512-21munin-run21:45:040
216049915510,26cyclictest26001-21switchtime19:32:010
216049915418,110cyclictest28800-21diskstats23:05:310
216049915414,121cyclictest272-21snmpd22:30:520
216049915413,118cyclictest29550-21apt-get19:55:280
216049915412,118cyclictest4774-21awk23:55:560
216049915329,19cyclictest23544-21munin-run19:20:020
216049915316,23cyclictest1358-21ntp_states23:35:500
216049915315,23cyclictest10008-21munin-run00:30:000
216049915315,113cyclictest6323-21/usr/sbin/munin20:50:460
216049915311,119cyclictest24768-21grep19:25:480
216049915310,120cyclictest24606-21grep22:40:050
216049915233,99cyclictest6410-21ntp_offset00:05:510
216049915222,29cyclictest7120-21apt-get20:55:210
216049915210,27cyclictest2655-21/usr/sbin/munin23:45:560
216049915113,111cyclictest26281-21apt-get19:35:120
216049915112,36cyclictest7946-1kworker/u3:321:50:140
216049915111,117cyclictest13708-21apt-config21:35:060
216049915110,97cyclictest9354-21unixbench_singl21:06:030
216049915018,108cyclictest27775-21munin-run23:00:010
216049915016,92cyclictest21348-21munin-run22:20:020
216049915016,107cyclictest21470-21apt-get22:20:200
216049915014,23cyclictest27794-21apt19:45:020
216049915013,114cyclictest2575-21sort20:25:460
216049915012,27cyclictest4990-21/usr/sbin/munin20:40:570
216049915011,24cyclictest111-21systemd-journal20:35:010
216049915010,114cyclictest1895-21grep20:20:530
216049914934,92cyclictest7402-21switchtime00:10:590
216049914918,25cyclictest5770-21memory20:45:530
21604991489,100cyclictest26858-21sort22:51:010
216049914834,21cyclictest32362-21apt-get20:10:130
216049914822,96cyclictest17432-21apt-get21:55:200
216049914819,24cyclictest19151-21df_inode22:05:270
216049914816,26cyclictest10282-21irqstats00:30:410
216049914815,36cyclictest18908-21users22:01:060
216049914815,21cyclictest24681-21apt-get22:40:180
216049914815,107cyclictest27894-21/usr/sbin/munin23:00:480
216049914811,26cyclictest1206-21switchtime20:15:580
216049914810,27cyclictest30520-21memory23:15:420
216049914810,27cyclictest12373-21kernelversion21:25:480
216049914716,47cyclictest10428-21df21:15:260
216049914710,97cyclictest22914-21grep22:26:020
216049914627,22cyclictest8307-21head00:16:030
216049914618,24cyclictest418-21irqstats23:30:390
216049914611,112cyclictest25854-21wc22:45:560
216049914511,109cyclictest28815-21fw_packets19:50:350
216049914414,25cyclictest23661-21/usr/sbin/munin19:20:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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