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2026-05-27 - 13:52

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 Wed May 27, 2026 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2513321300,3sleep025132-21dpkg20:00:110
812821240,2chrt8129-21sleep23:41:070
1057121210,2chrt10569-21ssh22:07:390
1132921200,2chrt11330-21latency_hist20:30:070
2207321180,3chrt22066-21ntpq00:02:100
813021170,2chrt8131-21cat21:16:070
1343021170,2chrt13432-21grep19:40:450
196121160,3chrt1962-21sleep21:05:560
525821140,3chrt5261-21aten2.4_rfpower20:20:240
2214021140,2chrt22144-21aten2.4_rfpower22:25:320
2146421140,3chrt21465-21awk23:12:200
452321110,2chrt4479-21ssh22:47:130
2120021100,2chrt21201-21seq22:23:420
102721100,2chrt1029-21grep23:30:510
1304721090,3chrt13049-21rm23:48:530
314821080,3chrt3149-21sleep21:56:410
3268721070,2chrt32688-21if_err_eth122:41:020
1381921070,2chrt13820-21runrttasks21:24:520
2713221060,3chrt27133-21runrttasks21:44:370
1773821050,3chrt17739-21sleep19:47:450
1395421050,2chrt13955-21mii-tool23:01:440
654621040,3chrt6547-21sleep21:13:340
166321020,2chrt1664-21sleep20:14:300
1878021010,2chrt18781-21sleep23:08:360
90702990,3chrt9071-21sh19:34:360
290222970,1sleep029024-21timerwakeupswit00:12:210
45692960,2sleep04570-21cat23:36:040
274602950,2sleep027461-21seq21:45:080
244582930,2sleep024457-21ld23:16:550
61452920,2sleep06143-21irqstats22:01:090
144322920,1sleep014433-21chrt22:13:510
284902830,2sleep028491-21cat22:35:050
283772830,2sleep028376-21ntpq20:56:120
121332830,2sleep012134-21cat00:36:030
315042790,2sleep031507-21wc23:27:230
153292790,2sleep015330-21apt-config22:15:180
145112780,2sleep014512-21idleruntime-cro20:35:010
24912760,2sleep02492-21chrt00:21:210
56772730,2sleep05679-21sed00:26:090
226442720,2sleep022647-21mailstats21:37:210
204092700,2sleep020410-21chrt21:34:360
169932680,2sleep016994-21chrt23:55:050
235372677,47sleep023611-21fschecks_time19:05:290
306742583,9sleep030669-21ntp_states19:16:110
5592573,8sleep0565-21ssh21:52:460
62592550,2sleep06260-21chrt22:50:320
29352543,9sleep02997-21memory20:15:480
156962540,2sleep015698-21timerandwakeup23:52:230
310152513,7sleep031024-21/usr/sbin/munin00:15:590
172702514,8sleep017253-21munin-run21:30:020
266322495,36sleep026638-21chrt00:09:330
97562480,2chrt9757-21aten2.4_rfpower22:55:360
277772470,2chrt27733-21ssh23:21:520
178142450,3chrt17815-21runrttasks20:40:110
298092440,3chrt29808-21seq22:36:180
2619690435,11cyclictest31591-21ntp_states21:01:250
221762433,32sleep022188-21ntpq20:46:140
2619690415,18cyclictest9719-21seq00:32:180
2619690415,10cyclictest25160-21ntpq20:51:060
26196904115,9cyclictest22081-21cpu19:55:250
2619690405,28cyclictest19798-21ntpq19:50:550
2619690404,10cyclictest16187-21python320:36:260
26196904018,15cyclictest0-21swapper19:20:230
26196904010,15cyclictest0-21swapper19:14:520
2619690397,12cyclictest3570-21diskstats19:25:330
2619690394,28cyclictest9965-21basename19:35:400
26196903813,19cyclictest28292-21apt-get20:05:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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