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2026-07-31 - 04:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack4slot1s.osadl.org (updated Fri Jul 31, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
560821000,2sleep30-21swapper/320:48:523
560821000,2sleep30-21swapper/320:48:523
110622790,3sleep30-21swapper/321:03:513
110622790,3sleep30-21swapper/321:03:513
307522770,3chrt0-21swapper/223:23:482
289842690,2chrt0-21swapper/120:23:571
289842690,2chrt0-21swapper/120:23:571
228752610,2chrt29-21ksoftirqd/120:08:501
228752610,2chrt29-21ksoftirqd/120:08:501
286652600,2sleep128668-21tail21:49:001
286652600,2sleep128668-21tail21:49:001
36722590,3sleep20-21swapper/222:08:592
36722590,3sleep20-21swapper/222:08:592
154482560,3sleep20-21swapper/200:08:512
101222520,3sleep30-21swapper/323:53:523
101222520,3sleep30-21swapper/323:53:523
288612510,3sleep12151-21cyclictest23:18:491
288612510,3sleep12151-21cyclictest23:18:491
288612510,3sleep12151-21cyclictest23:18:491
215899502,40cyclictest12955-21latency_hist00:03:410
215899502,40cyclictest12955-21latency_hist00:03:410
215899502,40cyclictest12955-21latency_hist00:03:410
195332500,3sleep00-21swapper/022:53:470
195332500,3sleep00-21swapper/022:53:470
253482490,4chrt0-21swapper/321:43:353
253482490,4chrt0-21swapper/321:43:353
2158994937,8cyclictest13170-21/usr/sbin/munin00:03:550
2158994937,8cyclictest13170-21/usr/sbin/munin00:03:550
141742490,3sleep10-21swapper/121:13:381
141742490,3sleep10-21swapper/121:13:381
268692480,2sleep10-21swapper/123:13:461
2159994625,12cyclictest700-21192.168.115.40-manager20:30:491
2159994625,12cyclictest700-21192.168.115.40-manager20:30:491
248022440,1sleep3431rcuc/320:13:503
2159994416,11cyclictest26760-21needreboot20:18:511
2159994416,11cyclictest26760-21needreboot20:18:511
2159994331,9cyclictest700-21192.168.115.40-manager21:05:561
2159994331,9cyclictest700-21192.168.115.40-manager21:05:561
2159994315,12cyclictest22723-21taskset23:01:211
2159994315,12cyclictest22723-21taskset23:01:211
273492420,2sleep027352-21grep20:18:580
273492420,2sleep027352-21grep20:18:580
315782410,3sleep20-21swapper/221:58:502
315782410,3sleep20-21swapper/221:58:502
2159994014,10cyclictest13297-21taskset22:35:301
2159994014,10cyclictest13297-21taskset22:35:301
176302400,2sleep10-21swapper/100:13:571
176302400,2sleep10-21swapper/100:13:571
2159993929,8cyclictest700-21192.168.115.40-manager20:37:571
2159993914,12cyclictest9954-21date22:28:421
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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