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2026-03-10 - 00:11

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 all highest latencies:
System rack5slot7s.osadl.org (updated Mon Mar 09, 2026 12:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6648224192184,88sleep00-21swapper07:06:490
70479916922,121cyclictest12538-21/usr/sbin/munin07:41:090
70479916414,104cyclictest26123-21cat12:20:420
70479916313,125cyclictest4676-21users10:07:090
70479916222,30cyclictest30739-21diskstats09:30:340
70479916218,101cyclictest28996-21apt12:40:010
70479916116,121cyclictest5790-21snmpd07:11:060
70479916113,121cyclictest10593-21apt-get07:31:420
70479916035,20cyclictest12419-21munin-run07:40:020
7047991599,123cyclictest24439-21apt-get08:56:510
70479915914,121cyclictest7078-21sed10:21:030
70479915914,120cyclictest31707-21tr09:35:470
70479915816,25cyclictest16706-21irqstats08:05:370
70479915816,118cyclictest26458-21apt-get09:05:260
70479915811,121cyclictest17768-21cron11:30:000
70479915713,39cyclictest10517-21grep07:26:010
70479915617,22cyclictest13752-21diskstats11:05:330
70479915614,118cyclictest5394-21timerwakeupswit10:11:090
70479915613,122cyclictest13570-21sort11:05:030
70479915611,24cyclictest16020-21latency_hist11:20:090
70479915515,98cyclictest2069-21munin-run09:55:010
70479915416,92cyclictest16548-21/usr/sbin/munin11:21:270
70479915416,110cyclictest5606-21apt-get10:15:170
70479915415,112cyclictest17430-21df08:10:260
70479915318,25cyclictest27506-21apt-get12:30:140
70479915318,23cyclictest13985-21users07:46:050
70479915317,24cyclictest8030-21apt-get10:30:180
70479915315,26cyclictest23127-21irqstats08:45:360
70479915315,23cyclictest28107-21apt09:15:000
70479915314,26cyclictest22502-21grep11:56:010
70479915310,41cyclictest18845-21irqstats11:35:380
70479915229,23cyclictest14741-21unixbench_singl07:51:010
70479915220,19cyclictest0-21swapper09:20:570
70479915216,25cyclictest14919-21apt-get07:55:160
70479915214,26cyclictest24394-21df12:10:240
70479915213,22cyclictest12490-21awk10:55:580
70479915213,115cyclictest28914-21sh09:20:020
70479915212,101cyclictest21778-21latency_hist11:55:000
70479915210,99cyclictest18089-21sort11:30:410
70479915210,102cyclictest5790-21snmpd09:25:350
70479915111,115cyclictest26110-21sort09:01:060
70479915111,101cyclictest10005-21ps10:40:530
70479915034,18cyclictest0-21swapper07:25:040
70479915016,110cyclictest32417-21irqstats09:40:380
70479915014,24cyclictest9524-21munin-run10:40:020
70479915013,113cyclictest8968-21modprobe07:20:010
70479915012,113cyclictest10801-21grep10:45:540
70479914927,102cyclictest20938-21unixbench_singl11:46:020
70479914917,23cyclictest22816-21users08:41:050
70479914914,27cyclictest11883-21/usr/sbin/munin10:51:050
70479914914,23cyclictest21512-21irqstats08:35:400
70479914912,112cyclictest24549-21cat08:55:100
70479914911,115cyclictest16413-21sshd08:01:350
70479914828,21cyclictest0-21swapper08:30:570
70479914816,23cyclictest25796-21munin-run12:20:020
70479914813,112cyclictest7759-21ls10:25:590
70479914719,25cyclictest18229-21df_inode08:15:280
70479914715,25cyclictest2279-21df_inode09:55:290
70479914714,23cyclictest27169-21cut12:25:560
70479914713,26cyclictest19701-21/usr/sbin/munin11:40:430
70479914711,112cyclictest19699-21sort08:25:040
7047991469,114cyclictest23865-21wc12:05:530
70479914615,109cyclictest22811-21df_inode12:00:290
70479914614,109cyclictest3092-21df10:00:240
70479914514,23cyclictest19857-21df_inode08:25:290
70479914512,113cyclictest753-21irqstats09:45:370
70479914510,26cyclictest14716-21grep11:10:490
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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