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2025-11-06 - 15:32

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, 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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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
Compare latency of primary with shadow system
Characteristics of all highest latencies:
System rackfslot4s.osadl.org (updated Thu Nov 06, 2025 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2701121300,1sleep027010-21nfs4_client19:05:370
1945821290,3chrt19457-21/usr/sbin/munin22:55:530
1503221190,3chrt15033-21sh22:47:410
2800121160,3chrt27997-21cat00:10:050
87521150,2sleep0874-21ls21:25:060
851421130,2chrt8515-21rm21:38:040
476821120,2chrt4766-21/usr/sbin/munin23:27:120
2683921120,3chrt26837-21fschecks_time22:10:540
78621080,2chrt787-21ld22:21:540
1877221070,2sleep018773-21ls23:52:240
1063721060,2chrt10638-21sh20:41:060
256321040,2chrt2564-21sh23:23:380
2841521020,3chrt28416-21sleep20:12:530
195932920,2sleep019594-21cat21:00:050
113112900,2sleep011312-21basename23:40:010
292612890,2sleep029262-21sh21:17:150
23912850,2sleep02390-21cut20:25:370
45962840,2sleep04594-21if_can000:26:020
157592810,2chrt15746-21ntpq20:51:170
84032780,1sleep08401-21if_eth022:36:030
318182780,2sleep031816-21users23:17:200
164122760,1sleep016410-21ls19:50:030
272232750,2sleep027221-21cat23:10:050
175062690,2sleep017508-21ntp_offset22:51:450
117012660,1sleep011704-21tail23:40:330
237252625,9sleep0859-21snmpd00:01:270
323482583,45sleep032354-21sleep20:20:370
72952553,41sleep07300-21ntpq19:30:510
317152540,3chrt31706-21awk22:20:010
129582543,42sleep012991-21fschecks_time21:46:270
28554905319,25cyclictest0-21swapper21:27:360
292712523,39sleep029268-21ntpq00:11:300
93772514,7sleep09339-21apt-get21:40:210
84182513,8sleep08479-21users20:36:270
221532513,38sleep022155-21diskstats23:00:470
323212500,3chrt32300-21ntpq00:17:090
304232503,36sleep030425-21memory20:16:380
28554905021,22cyclictest0-21swapper23:57:580
28554904916,25cyclictest0-21swapper00:34:480
28554904819,22cyclictest0-21swapper21:14:520
28554904720,20cyclictest0-21swapper22:28:350
215872470,3chrt21585-21/usr/sbin/munin22:01:400
28554904617,14cyclictest0-21swapper21:33:160
243012462,36sleep024405-21irqrtprio22:06:050
80622440,1sleep08063-21rm23:33:320
28554904414,23cyclictest0-21swapper22:32:590
28554904314,22cyclictest0-21swapper23:47:330
28554904313,22cyclictest0-21swapper23:13:030
28554904311,23cyclictest0-21swapper00:35:060
174242432,5sleep017422-21ssh21:54:190
102392430,1sleep010281-21cat19:36:250
2855490425,9cyclictest21574-21users21:02:190
2855490424,10cyclictest12570-21ntp_states19:41:120
28554904215,20cyclictest12119-21python322:42:150
28554904215,10cyclictest29535-21latency19:10:480
28554904212,12cyclictest25101-21ntpq20:06:010
17712423,30sleep01777-21smartctl19:20:370
2855490415,9cyclictest22690-21ntpq20:01:150
2855490414,19cyclictest23507-21ntpq21:06:090
28554904113,21cyclictest0-21swapper21:58:290
2855490404,11cyclictest12878-21irqstats20:45:440
2855490404,10cyclictest32188-21ntpq19:15:550
28554904014,9cyclictest5772-21mailstats20:31:220
28554904012,10cyclictest2062-21irqrtprio00:21:070
2855490394,16cyclictest20110-21chrt19:56:100
2855490393,17cyclictest16767-21/usr/sbin/munin19:50:310
2855490374,25cyclictest4150-21diskstats19:25:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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