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2026-05-30 - 18:37

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 Sat May 30, 2026 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
675221300,3chrt6749-21ntpq09:41:180
3032621190,3chrt30325-21/usr/sbin/munin07:45:400
924721180,2chrt9242-21diskstats12:10:470
2489621170,2sleep024899-21aten2.4_rfpower09:20:370
1231721160,1sleep012318-21chrt10:38:090
439221150,2chrt4391-21/usr/sbin/munin10:26:080
2223021150,2chrt22231-21irqrtprio09:16:110
2013821130,2chrt20139-21seq10:01:350
3004621120,2chrt30045-21seq11:53:200
776721110,3chrt7768-21seq11:20:170
3048121100,2chrt30480-21basename11:05:350
853421090,2sleep08536-21switchtime10:32:160
2974721080,2chrt29748-21sleep11:04:210
2028521060,2sleep020286-21seq11:38:490
34222960,2sleep03423-21chrt11:13:100
155242950,2sleep015526-21cat11:31:150
262252930,2sleep026226-21seq11:47:180
246342920,2sleep024637-21sed10:56:510
215732910,2sleep021574-21chrt12:29:210
193442900,3sleep019345-21chrt08:20:210
124522890,2sleep012453-21chrt11:26:390
248832860,1sleep024884-21chrt10:08:130
154482850,2sleep015449-21seq07:21:070
54482840,2sleep05449-21awk12:05:150
133952830,2sleep013396-21chrt08:10:300
46662810,2sleep04668-21aten2.4_rfpower11:15:340
196262810,2sleep019627-21seq09:12:170
273462790,2sleep027342-21uptime12:37:200
787290786,12cyclictest31981-21perl11:56:290
208582770,2sleep020861-21sed10:51:050
40752750,1sleep04076-21seq09:37:240
104552750,2sleep010456-21ssh09:46:590
787290724,9cyclictest6691-21ntpq08:51:110
99842710,2sleep09985-21seq08:05:160
151062710,2sleep015107-21chrt09:05:280
116852700,1sleep011686-21chrt09:00:110
303252690,2sleep030326-21seq09:28:120
121632690,2sleep012164-21date09:50:060
7872906714,21cyclictest0-21swapper12:04:460
180672640,2sleep018068-21irqrtprio07:25:440
326712588,41sleep032713-21cut10:20:360
124772560,1sleep012478-21cat12:15:370
89262540,1sleep08983-21fschecks_count08:55:340
7872904717,23cyclictest0-21swapper09:58:170
7872904716,21cyclictest0-21swapper09:30:100
592024711,21sleep05917-21ntpq07:05:460
7872904516,21cyclictest0-21swapper10:12:590
7872904515,22cyclictest0-21swapper10:49:130
7872904417,19cyclictest25810-21df08:30:270
7872904415,22cyclictest0-21swapper10:18:360
33562440,3sleep03357-21chrt07:55:030
787290435,10cyclictest13954-21hddtemp_smartct10:40:560
7872904316,8cyclictest29558-21memory08:35:490
7872904314,22cyclictest0-21swapper11:42:510
278122430,3chrt27813-21sh07:41:010
240422430,3sleep024045-21grep12:32:260
239152430,2sleep023948-21fschecks_count07:35:340
7872904219,14cyclictest0-21swapper08:15:320
787290414,9cyclictest3600-21ntp_states08:46:110
787290414,28cyclictest412-21snmpd08:25:320
787290414,10cyclictest32763-21ntpq08:40:550
7872904114,9cyclictest8367-21python308:01:270
787290405,27cyclictest9001-21memory07:10:510
787290404,11cyclictest4354-21df07:56:190
787290404,11cyclictest16823-21ntpq12:21:380
787290395,13cyclictest21488-21ntpq07:30:530
7872903912,10cyclictest11369-21grep07:15:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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