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2025-10-17 - 13:38

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 the 376 highest latencies:
System rackfslot4s.osadl.org (updated Fri Oct 17, 2025 00:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
561121290,4chrt5612-21fschecks_count23:25:510
2847421290,3chrt28476-21fschecks_time21:05:470
2941921260,2chrt29420-21aten2.4_rfpower23:10:320
1644821230,2chrt16449-21/usr/sbin/munin20:41:270
1755621170,2chrt17540-21ntpq23:46:500
206721160,3chrt2063-21ntpq21:16:360
2456521150,2chrt24564-21sendmail-msp00:00:020
3140021100,2chrt31401-21sh00:11:280
2533521050,3chrt25336-21ssh22:04:210
2538421040,2chrt25386-21cut19:55:540
1815221030,2chrt18155-21wc21:51:080
893821020,2sleep08939-21latency23:31:160
114892950,2sleep011490-21uname20:32:100
126132910,2sleep012614-21cat21:40:050
144682890,1sleep014470-21cut23:41:190
126772890,2sleep012678-21ssh23:38:070
39182870,2sleep03920-21processes23:22:110
284052830,2sleep028406-21run-parts20:01:250
192242820,2sleep019225-21awk23:50:180
157092780,2sleep015710-21ntpq19:36:550
276352730,1sleep027636-21gcc23:06:220
94222650,1sleep09425-21cut00:30:520
299792584,43sleep029995-21fschecks_time20:05:310
325302563,7sleep032527-21ntpq22:16:450
250662553,8sleep025075-21df00:00:400
74242533,8sleep07432-21ntpq00:26:490
238512533,41sleep023847-21ntpq20:55:510
282472522,5sleep028178-21ssh00:06:090
33602512,6sleep03363-21ssh00:20:150
2422905121,21cyclictest0-21swapper22:58:320
186142514,38sleep018626-21sed20:45:550
2422905019,22cyclictest0-21swapper23:18:330
198252503,6sleep019827-21python322:52:160
87524912,22sleep0877-21ntpq19:05:390
45122493,7sleep04552-21ssh22:25:330
22482490,3chrt2246-21/usr/sbin/munin20:15:180
75002483,35sleep07523-21memory19:20:430
2422904819,22cyclictest0-21swapper22:24:370
2422904819,13cyclictest0-21swapper00:35:120
231742483,38sleep023171-21ntpq19:51:120
127072482,6sleep012698-21apt-get21:40:150
64102473,34sleep06412-21memory21:26:110
2422904716,23cyclictest0-21swapper22:05:080
2422904618,21cyclictest0-21swapper21:49:130
2422904618,20cyclictest0-21swapper21:30:280
2422904616,21cyclictest0-21swapper00:19:330
2422904615,24cyclictest0-21swapper23:02:590
2422904517,21cyclictest0-21swapper22:43:190
2422904514,22cyclictest0-21swapper21:10:060
117802450,3chrt11772-21aten2.4-expect19:30:270
242290425,10cyclictest21054-21perl20:51:300
242290424,9cyclictest20371-21diskstats21:55:470
2422904220,16cyclictest0-21swapper22:47:280
242290414,9cyclictest26579-21ntp_states21:01:100
2422904116,19cyclictest9666-21/usr/sbin/munin20:30:040
2422904116,19cyclictest29034-21fw_packets22:10:540
2422904114,19cyclictest0-21swapper21:24:450
2422904113,9cyclictest8754-21python322:32:180
2422904113,10cyclictest10237-21sleep22:35:380
242290405,8cyclictest18056-21ntpq19:41:060
242290405,16cyclictest53212sleep019:15:250
242290404,17cyclictest5125-21munin-run19:15:020
2422904013,9cyclictest20680-21ntp_states19:46:170
242290395,8cyclictest5780-21ntpq20:20:570
242290394,16cyclictest9174-21apt-get19:25:210
2422903914,18cyclictest494-21irqstats20:10:450
242290385,27cyclictest12874-21df20:35:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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