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2025-06-16 - 20:09

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 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 Mon Jun 16, 2025 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2077921240,2chrt20775-21ntpq10:21:400
553021200,4chrt5529-21sed07:50:460
3221621170,3chrt32211-21awk09:45:000
2714821170,2chrt27149-21sleep12:30:510
2532721140,2chrt25314-21ntpq07:25:560
2312021120,3chrt23121-21sleep09:27:520
1972321100,2chrt19724-21sleep12:16:450
1246421100,2chrt12465-21sleep10:06:420
387921090,2chrt3881-21proc_pri08:51:260
1793921070,2chrt17941-21modprobe10:16:360
2536121050,2chrt25362-21ssh11:28:320
104482930,2sleep010450-21/usr/sbin/munin12:00:400
149302920,2sleep014926-21apt11:10:170
145652900,2sleep014567-21swap09:12:490
101232890,2sleep010121-21threads10:02:220
188412830,2sleep018839-21fschecks_count09:20:540
77912800,2sleep07793-21awk10:56:320
231872800,2sleep023190-21uniq10:26:450
187512800,2sleep018753-21sed11:16:170
183482800,2sleep018350-21sort12:15:040
180532580,1sleep018054-21ssh09:19:360
157972580,2sleep015800-21ntp_kernel_err08:10:520
117022580,2sleep011704-21timerwakeupswit09:06:320
90942550,1sleep09096-21cat11:57:240
23532520,2sleep02355-21sh10:46:440
264902500,2chrt26470-21ntpq10:31:420
62682490,3sleep06266-21swap11:52:230
61742491,40sleep06172-21ssh10:54:150
4632483,38sleep0459-21ntpq07:40:580
16593904820,21cyclictest0-21swapper10:39:110
16593904818,23cyclictest0-21swapper12:27:270
16593904620,18cyclictest25149-21telnet08:30:260
16593904616,23cyclictest0-21swapper11:48:540
16593904615,22cyclictest0-21swapper09:39:240
223732452,36sleep022368-21ntpq12:21:240
1659390458,18cyclictest0-21swapper09:58:140
16593904517,21cyclictest0-21swapper11:34:450
16593904516,22cyclictest0-21swapper12:39:100
16593904515,21cyclictest0-21swapper09:54:190
1445324512,18sleep014460-21df_inode07:05:250
278302440,2chrt27828-21ld07:30:540
1659390447,10cyclictest11051-21python311:02:260
1659390445,20cyclictest8212-21ntpq07:55:530
16593904416,9cyclictest1355-21ntp_states09:47:060
16593904414,21cyclictest0-21swapper12:09:030
16593904317,21cyclictest0-21swapper07:17:070
16593904314,22cyclictest0-21swapper10:10:350
205792420,2sleep020647-21irqrtprio08:20:530
1659390426,28cyclictest22445-21apt-get08:25:190
1659390424,9cyclictest6219-21ntpq08:56:050
1659390424,10cyclictest30940-21memory08:40:490
16593904221,13cyclictest0-21swapper11:44:250
16593904220,15cyclictest0-21swapper11:20:080
16593904216,20cyclictest0-21swapper11:08:190
16593904214,21cyclictest0-21swapper09:33:380
16593904211,22cyclictest0-21swapper11:35:070
1659390415,27cyclictest29678-21diskstats07:35:310
1659390415,26cyclictest2108-21sleep07:45:080
1659390415,17cyclictest31364-21if_can010:40:590
1659390414,17cyclictest17752-21sshd08:15:340
1659390414,10cyclictest12634-21diskstats08:05:320
16593904118,15cyclictest0-21swapper07:20:140
16593904116,19cyclictest0-21swapper09:00:050
16593904013,19cyclictest0-21swapper08:45:070
1659390394,9cyclictest18202-21users07:11:280
1659390394,10cyclictest27825-21diskstats08:35:360
16593903914,8cyclictest10996-21ntp_states08:01:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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